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HomeMy WebLinkAboutAGENDA REPORT 2009 1216 CC REG ITEM 10G ITEM 10.G CiTY OF MOORPARK,CH�E ._!,1 City Council Meeting of /a2 -/G-A00 2 _. ACTION; 12A,447A a" MOORPARK CITY COUNCIL T p-e — �=�� AGENDA REPORT TO: Honorable City Council FROM: Yugal K. Lail, City Engineer/Public Works Director Prepared by: Shaun Kroes, Senior Management Analyst DATE: November 16, 2009 (CC meeting of 12/16/2009) SUBJECT: Consider Amendment to Cost Sharing Memorandum of Agreement for the Calleguas Creek Total Maximum Daily Load Monitoring and Implementation Program BACKGROUND/DISCUSSION This item was originally agendized for the regular City Council meeting of December 2, 2009, which was adjourned to December 16, 2009. On November 7, 2007, the City Council approved a cost sharing Memorandum of Agreement (MOA) with the Cities of Camarillo, Oxnard, Simi Valley and Thousand Oaks, the Camarillo Sanitary District, the County of Ventura, the Ventura County Waterworks District No. 1, Camrosa Water District, the U.S. Department of Navy, the California Department of Transportation (collectively,the Public Agencies), and the Ventura County Agricultural Irrigated Lands Group (Ag Group) for management, funding and cost sharing required for the implementation of the Calleguas Creek Watershed Total Maximum Daily Load (TMDL) Program. The City Council is now being asked to approve an Amendment to the MOA to continue participation in a regional program for management, funding and cost sharing required for the implementation of the Calleguas Creek TMDL Program. The amendment adds work related to two adopted TMDLS for trash (not applicable to Moorpark) and salts (applicable to Moorpark) and work related to a future TMDL for bacteria. At the time of the original MOA adopted in 2007, there were four TMDLs for Calleguas Creek that were adopted by the Los Angeles Regional Water Quality Control Board (RWCQB) and the Environmental Protection Agency(EPA),which include impairments for Nitrogen; Toxicity; Organochlorine Pesticides, PCBs, and Siltation; and Metals. Since then, the RWCQB and EPA have also adopted two more TMDLs (trash and salts). These TMDLs require specific water quality monitoring and implementation actions that must be completed within a specified time frame. The public agencies listed above along with the Ag Group worked collaboratively on these TMDLs and determined that it would be more S:\Public Works\Everyone\Reports\Staff Reports\2009\December\12-16-2009(FY 09-10 Calleguas TMDL Agreement)doc 242 Honorable City Council December 16, 2009 Page 2 cost effective to share in the costs of the required monitoring and implementation program. The proposed amendment updates the original MOA to reflect the new TMDL requirements and continues the coordinated efforts of all cooperating agencies. FISCAL IMPACT Moorpark's expected FY 2009/10 contribution is $33,996. Sufficient funds are already available in the FY 2009/10 budget. STAFF RECOMMENDATION Authorize the Mayor to sign the First Amended and Restated MOA. Attachment: 1. First Amended and Restated MOA SAPublic Works\Everyone\Reports\Staff Reports\2009\December\12-16-2009(FY 09-10 Calleguas TMDL Agreement).doc 243 Attachment 1 First Amended and Restated MEMORANDUM OF AGREEMENT Management, Funding and Cost Sharing for the Implementation of the Calleguas Creek Watershed Total Maximum Daily Load Program This First Amended and Restated Memorandum of Agreement ("MOA") is entered into effective 2009, by the Camrosa Water District, the Camarillo Sanitary District, the City of Camarillo, the City of Moorpark, the City of Oxnard, the City of Simi Valley, the City of Thousand Oaks, the County of Ventura, the Ventura County Waterworks District No. 1, the U.S. Department of Navy, the California Department of Transportation (collectively, the "Public Agencies") and the Ventura County Agricultural Irrigated Lands Group within the Calleguas Creek Watershed ("Ag Group"), a subdivision of the Farm Bureau of Ventura County ("Farm Bureau"), which together with the Public Agencies are collectively the "PARTIES". The PARTIES agree as follows: RECITALS A. On October 24, 2002, the California Regional Water Quality Control Board, Los Angeles Region ("RWQCB") adopted Resolution No. 2002-017 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to include a Total Maximum Daily Load ("TMDL") for Nitrogen Compounds and Related Effects in Calleguas Creek, a copy of which is attached and incorporated as Exhibit A. B. On July 7, 2005, the RWQCB adopted Resolution No. 2005-009 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to incorporate a TMDL for Toxicity, Chlorpyrifos, and Diazinon in Calleguas Creek, its tributaries and Mugu Lagoon a copy of which is attached and incorporated as Exhibit B. C. On July 7, 2005, the RWQCB adopted Resolution No. 2005-010 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to incorporate a TMDL for Organochlorine Pesticides, Polychorinated Biphenyls, and Siltation in Calleguas Creek, its tributaries and Mugu Lagoon, a copy of which is attached and incorporated as Exhibit C. D. On June 8, 2006, the RWQCB adopted Resolution No. 2006-012 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to incorporate a TMDL for Copper, Mercury, Nickel, and Selenium ("Metals") for Calleguas Creek, its tributaries, and Mugu Lagoon, a copy of which is attached and incorporated as Exhibit D. E. On June 7, 2007, the RWQCB adopted Resolution No. 2007-007 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to incorporate a TMDL for Trash in the Revolon Slough/Beardsley Wash Page 1 of 14 244 Subwatershed of Calleguas Creek, a copy of which is attached and incorporated as Exhibit J. F. On October 4, 2007, the RWQCB adopted Resolution No. 2007-016 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to incorporate a TMDL for Boron, Chloride, TDS, and Sulfate ("Salts") in Calleguas Creek, its tributaries and Mugu Lagoon, a copy of which is attached and incorporated as Exhibit K. G. Eight of fourteen reaches in the Calleguas Creek Watershed ("CCW") are identified on the 2006 Clean Water Act Section 303(d) list of water-quality limited segments as impaired due to elevated levels of fecal coliform in water. The PARTIES may initiate further work on developing the Bacteria TMDL to address these impairments. H. RWQCB Resolutions 2002-017, 2005-009, 2005-010, 2006-012, 2007-007 and 2007-016 are jointly referred to herein as the "TMDLs". I. The TMDLs are not self-executing and not all the TMDLs have been incorporated into all the existing National Pollutant Discharge Elimination System Permits regarding Waste Discharger Requirements for Municipal Stormwater and Urban Runoff Discharges or Publicly Owned Treatment Works ("POTWs") or the Irrigated Lands Waiver(RWQCB Order No. R4-2005-0080) (jointly referred to herein as the "NPDES Permit") within the CCW in the manner required for the limits of the TMDLs to be legally enforceable. J. The TMDLs require a monitoring and reporting program plan to be submitted to the RWQCB for approval. K. On September 24, 2006 the PARTIES submitted to the RWQCB, in accordance with the requirements of the TMDLs, the Calleguas Creek Watershed Management Plan TMDL Monitoring and Reporting Program's Quality Assurance Program Plan ("QAPP") hereinafter referred to as "Monitoring Plan," which is attached and incorporated as Exhibit E. L. On October 15, 2007, the RWQCB approved the Monitoring Plan. M. On June 26, 2007, the PARTIES submitted to the RWQCB, in accordance with the requirements of the Metals TMDL, a Monitoring and Reporting Plan to be incorporated into the QAPP, which is attached and incorporated as Exhibit E1. N. On January 30, 2009, the RWQCB approved the Metals Monitoring Plan. O. On June 2, 2009 the PARTIES submitted to the RWQCB, in accordance with the requirements of the Salts TMDL, a Monitoring and Reporting Plan to be incorporated into the QAPP, which is attached and incorporated as Exhibit E2. Page 2 of 14 245 P. The PARTIES' original MOA became effective on March 1, 2008, which established a joint monitoring and implementation program ("Program") that was consistent with the approved Monitoring Plan and consistent with the TMDLs. Q. The PARTIES desire to amend and restate in its entirety the MOA in order to continue the Program in a manner consistent with the approved Monitoring Plan and consistent with the TMDLs as they presently exist or are hereafter amended. R. The U.S. Department of the Navy("Navy") is an agency of the federal government, and therefore may be subject to limitations on its ability or requirement to comply with every provision of this MOA to the same extent that the Public Agencies are able to comply. These limitations are based upon, but not limited to, those identified in the federal Clean Water Act, the federal Antideficiency Act, the principle of sovereign immunity and the holdings of the United States Supreme Court, and other binding federal court decisions, as they interpret those sources of federal law. The limitations so mentioned include, but are not limited to, the availability of federal funding to pay for participation in this program, the ability of the Navy to participate directly in sampling, research or data gathering activities that are not located on Navy or federal lands or a point source of water discharge arising on Navy or federal lands, or other activities not specifically authorized by the federal Clean Water Act. To the extent the limitations described in this paragraph prevent the Navy from fully participating in the Program, it reserves the right, in its sole discretion, to participate in the Program and this MOA as a matter of comity. By entering into this MOA, the Navy does not authorize any of the Public Agencies to exercise regulatory authority over it except to the extent expressly permitted by state or federal law. S. The PARTIES also acknowledge that the obligation of the California Department of Transportation ("Caltrans") to contribute funds under this MOA is subject to the appropriation of funds by the California Legislature and the allocation of funds by the California Transportation Commission. AGREEMENT ARTICLE I — PURPOSE OF AGREEMENT 1.1. PURPOSE. The purpose of this MOA is to cooperatively and voluntarily devise and jointly fund a coordinated Program that is consistent with the TMDLs, that implements the Monitoring Plan, and that establishes a mechanism for the sharing of the costs associated with the Program. The PARTIES acknowledge that this MOA and the work to be accomplished hereunder is undertaken on a voluntary basis since the TMDL allocations have not been incorporated into the NPDES permits or Irrigated Lands Waiver in the manner required by law to be enforceable. Page 3 of 14 246 1.2. MAXIMUM EXTENT PRACTICABLE STANDARD. Nothing in this MOA, nor any activity approved or carried out by the PARTIES hereunder, may be interpreted as a waiver of the position that the efforts undertaken by the PARTIES are not subject to the "Maximum Extent Practicable" standard set forth in the Clean Water Act (33 U.S.C. Section 1251 et seq.). ARTICLE II — RESPONSIBILITIES 2.1. PARTIES. A. The PARTIES agree to designate four discharger groups as follows: 1) POTWs, consisting of Camrosa Water District, Camarillo Sanitary District, Ventura County Waterworks District No. 1, and the Cities of Simi Valley and Thousand Oaks; 2) "Urban Dischargers," consisting of the Cities of Simi Valley, Thousand Oaks, Camarillo, Moorpark and Oxnard and the County of Ventura; 3) "Agricultural Dischargers," consisting of the Ag Group; and 4) "Other Dischargers," consisting of the U.S. Department of Navy and Caltrans. B. The PARTIES agree to form a "Management Committee" consisting of one representative each from the POTWs, Urban Dischargers and Other Dischargers groups and two representatives from the Agricultural Dischargers group. Each discharger group will select its applicable representatives and will also select an alternate representative to serve in the absence of each primary representative in whatever manner each group deems appropriate. The representatives of the discharger groups that consist of Public Agencies will be agency employees with appropriate technical backgrounds or responsibilities relevant to the purposes of the Program. The PARTIES authorize the Management Committee to oversee the Program and make decisions to assure the Program is carried out in a timely, accountable fashion. The PARTIES reserve the authority to adopt the annual budget, and task the Management Committee to diligently concur on a recommended budget annually in order to present a recommended budget to the PARTIES for adoption. The PARTIES further reserve the authority to make substantial changes to each budget and to review and adopt any budget increase during the fiscal year as may be required to implement the Program. C. Annually, the PARTIES must each contribute the funding allocated to their respective agency in accordance with Exhibit F and reflected in Exhibits G and H. Each PARTY's voting power and cost allocations will be based on such PARTY'S actual annual allocated costs. 2.2. MANAGEMENT COMMITTEE. A. The Management Committee will attempt to reach consensus on all issues. If a vote is necessary, each Management Committee member will have one vote. A motion requires four affirmative votes of the Management Committee for passage. The Management Committee representatives will serve a minimum Page 4 of 14 247 term of one fiscal year starting July 1 through June 30. Each discharger group has the right to choose its representatives, including reappointing incumbent representatives, each fiscal year. B. The Management Committee will implement the Program following the principles and methods provided in this MOA. C. The Management Committee will recommend a budget for the PARTIES approval and funding as provided in this MOA. D. The Management Committee will manage Program task timelines and budgets as provided in the approved budget. The Management Committee will review and recommend budget variances and increases in funding to the PARTIES. E. The Management Committee will select the primary contractors ("Prime Contractors") to implement each element of the Program. The Prime Contractors will be responsible for technical program management in accordance with the requirements of the Monitoring Plans and TMDLs 2.3. FISCAL AGENT. A. The PARTIES will designate a "Fiscal Agent" for the PARTIES by a separate "Fiscal Agent Contract" which will be submitted for approval by the PARTIES. The Fiscal Agent will develop a recommended annual budget for review by the Management Committee, and ultimate approval by the PARTIES. The Fiscal Agent will contract with the selected Prime Contractors to implement the Program consisting of monitoring, laboratory services, data management, reporting, and implementation actions. The PARTIES agree to reimburse the Fiscal Agent for such management services as provided in the budget and the Fiscal Agent Contract. B. The Fiscal Agent must be a public agency and must serve a term of not less than one fiscal year. C. The then current Fiscal Agent may withdraw upon providing written notice to the Management Committee before March 1St prior to the next fiscal year. D. In the event that the Fiscal Agent withdraws from this MOA, another public agency may serve as successor Fiscal Agent. Any public agency willing to serve as successor Fiscal Agent may be nominated by another PARTY. Selection of a Fiscal Agent must be approved by the Management Committee. E. The Fiscal Agent must act in a timely manner to execute contracts with the Prime Contractor and all other contractors necessary to implement the Program. The Management Committee will select all contractors, and the Fiscal Agent will contract with those selected contractors. Upon the selection of a new Fiscal Page 5 of 14 248 Agent, if necessary, the new Fiscal Agent will renegotiate all existing contracts to ensure that they are properly assigned to the new Fiscal Agent. F. The Fiscal Agent will be the treasurer of Program funds. The Fiscal Agent, in accordance with generally accepted accounting procedures, must keep the Program funds segregated from any other funds administered by the Fiscal Agent; must credit the Program with appropriate interest income earned on Program funds in each fiscal year; and may not expend any funds except in accordance with the annual budget approved by the Management Committee or as otherwise directed by the Management Committee. G. By February 1 of each year, the Fiscal Agent must cause to be prepared a projected detailed annual budget for review and recommended approval by the Management Committee, and ultimate approval by the PARTIES, for the following fiscal year, as described under Section 3.1.13. The Fiscal Agent will retain all fiscal records for five years and make those records available for review by any PARTY upon request. H. The Fiscal Agent must provide a copy of any contract executed on behalf of the PARTIES to the Management Committee upon request. I. The Fiscal Agent may request under its agreement with the PARTIES, and as part of the annual Program budget, reimbursement for reasonable and customary costs incurred in providing the services under this MOA. Reimbursement to the Fiscal Agent will be subject to Management Committee review and approval as part of the Program budget. J. The Fiscal Agent will cause to be prepared an annual audit of expenditures and a report regarding the Program and submit such audit and report to the Management Committee within 90 days of the close of each fiscal year. 2.4. DOCUMENTATION. The PARTIES agree to provide all readily available information and documentation that is deemed necessary to perform the Program. 2.5. GRANT OF ACCESS RIGHTS. During the term of this MOA, the PARTIES (including all members of the Ag Group) will grant the right of access and entry to all monitoring locations to the Prime Contractors or any other contractor retained by the Fiscal Agent at all reasonable times for the purposes of collecting monitoring data consistent with the Monitoring Plan subject to all applicable laws of such PARTY. Any Public Agency or Prime Contractor intending to enter onto another PARTY's right-of-way, property or easement must first make a written request to the affected PARTY, identifying the site location, extent of access by persons (and equipment if any), dates and times of entry, as well as an explanation of the Page 6 of 14 249 purpose of that entry. The affected PARTY will then determine, within 10 working days, if that entry will require a formal encroachment permit or other approval. If a formal permit or approval is required based on that PARTY'S applicable law, the Public Agency or Prime Contractors must obtain such permit or approval. If a formal permit or approval is not required based on that PARTY's applicable law, the affected PARTY may still condition the right of entry on the accompaniment of a representative of the affected PARTY, who may restrict or limit the access to those persons deemed necessary at the sole discretion of the affected PARTY. ARTICLE III — FUNDING, COST & DATA SHARING 3.1. FUNDING. A. The PARTIES agree to provide funding for the costs of the Program including the services performed by the Prime Contractor and any other contractor retained by the Fiscal Agent consistent with each PARTY's percentage allocation as set forth in Exhibit F and reflected in Exhibits G and H. B. The monitoring cost estimate for the current Program year is attached as Exhibit G. The implementation cost estimate for the current Program year is attached as Exhibit H. If the actual budget exceeds the projected costs in Exhibits G and H, the Management Committee will develop a recommendation and call for a vote of the PARTIES to approve a revised budget. Each Program year, the applicable Prime Contractor and the Fiscal Agent will prepare a draft annual budget. The Fiscal Agent will facilitate budget review by the Management Committee and, upon the Management Committee reaching agreement, presentation of the recommended annual budget to the PARTIES. Once the PARTIES reach a two-thirds majority agreement on the recommended annual budget based on the PARTIES' percentage allocations, the budget will be considered an approved annual budget for the following fiscal year. The applicable Prime Contractor and Fiscal Agent will be provided a draft budget deadline by the Management Committee to provide sufficient time for review of the recommended Annual Budget to allow for its timely passage prior to June 30 annually. C. The Fiscal Agent will provide timely notice of fund transfers necessary to meet budgeted activities. D. The PARTIES understand and agree that the Farm Bureau has no specific or direct liability for the funds to be paid by the Ag Group within the CCW pursuant to this MOA. The Farm Bureau is a facilitator with the RWQCB in an Irrigated Agricultural Lands Waiver Program for properties within Ventura County, including properties within the CCW. The Farm Bureau cannot ensure that all irrigated agricultural property within the CCW is participating in, or will participate in the Ag Group. The Ag Group is the entity from which the Farm Bureau will collect funds due under this MOA. Page 7 of 14 250 In such capacity as a facilitator, the Farm Bureau cannot ensure or guarantee that all funds due from agriculture pursuant to this MOA will be collected. The Farm Bureau will use its best efforts to secure the greatest amount of participation by agricultural property within the CCW and the collection of funds due and owing under this MOA. E. To the extent a PARTY fails to timely pay all or a portion of such PARTY's cost allocation, the Management Committee must direct the applicable Prime Contractors to reduce to the extent feasible the Program monitoring and implementation activities that directly apply to such PARTY in proportion to the reduction in contributions from such PARTY. Under no circumstances will any PARTY be required to increase its contribution based on the failure of another PARTY to pay all or a portion of its cost allocation. 3.2. CONTRACT FOR SERVICES. A. The Management Committee will assist the Fiscal Agent in issuing requests for proposals, negotiating contracts, and selecting the Prime Contractors and any other contractors. If bids for the initial year of any subsequent fiscal year costs exceed the estimates in Exhibits G and H by more than ten percent (10%), the Management Committee must notify the PARTIES and request the PARTIES' direction on approval of additional funds. Payment for contract activities may only be made upon review and approval by the Management Committee of invoices submitted by the Prime Contractors and all other contractors. B. All Prime Contractors and all other contractors will be retained by contract with the Fiscal Agent. The Fiscal Agent will disburse funds to contractors within 30 days after approval of the invoice by the Management Committee. The Fiscal Agent will perform this role for the administrative convenience of the PARTIES. C. All costs for the Program are to be shared based upon' each PARTY's percentage allocation as set forth in Exhibit F. Fifty percent (50%) of each PARTY's share of first year costs as set forth in Exhibits G and H will be invoiced by, and is due and payable to the Fiscal Agent from each PARTY upon the effective date of this MOA, and the remaining fifty percent (50%) is due after six months from the effective date of the MOA. Subsequent annual budget costs will be due and payable to the Fiscal Agent within 45 days of receipt of the invoice, or upon such other terms as the Management Committee may approve. 3.3 DATA SHARING. It is the intent of the PARTIES that the monitoring data collected will remain in draft form until released to the RWQCB under the PARTIES' NPDES permits and the Irrigated Lands Waiver. Prior to such disclosure, no PARTY may share the monitoring data generated from the Program with members of the public without first obtaining permission from the Management Committee. Page 8 of 14 251 ARTICLE IV— GENERAL PROVISIONS 4.1. TERM. The effective date of this MOA is the date first above written. The initial term of the MOA will continue for a period of five years from the effective date. Thereafter, the MOA will automatically renew upon the anniversary of the effective date upon consensus of the PARTIES until terminated in the manner provided for in this MOA. 4.2. WITHDRAWAL. A. Any PARTY may withdraw from this MOA by providing written notice to the Management Committee on or before: (i) March 1 in any year; (ii) 30 days from notice of the Management Committee's recommended annual budget; or (iii) 15 days from any other PARTY's notice of withdrawal. If notice is timely given, the withdrawal will become effective at the beginning of the next fiscal year. B. Any PARTY that withdraws from this MOA will remain liable for that PARTY's share of the costs under this MOA through the end of the then current fiscal year. C. The withdrawing PARTY will be responsible for all lawfully assessed penalties on such PARTY as a consequence of and subsequent to the withdrawal. The withdrawing PARTY will also be responsible for fulfilling all requirements of the Program applicable to such withdrawing PARTY. D. Upon withdrawal or delay in adoption of the MOU by any PARTY, the Management Committee will revise the cost sharing formula set forth in Exhibit F to equitably reduce or reapportion the withdrawing PARTY's contribution among the remaining PARTIES. 4.3. AMENDMENTS. A. During the term of this MOA, any PARTY may request that the other PARTIES negotiate, in good faith, modifications to the MOA that may be reasonably necessary because of changed circumstances. B. Any amendment to this MOA must be in writing and must be consented to by all PARTIES. Upon such consent, the amendment must be executed by each Party within three months of notice by the Management Committee. 4.4. NOTICES. Any notices, bills, invoices, or reports relating to this MOA, and any request, demand, statement or other communication required or permitted hereunder must be in writing and must be delivered to the representatives of the PARTIES Page 9 of 14 252 at the addresses set forth in Exhibit I attached hereto. A notice will be deemed to have been received on (a) the day of delivery, if delivered by hand during regular business hours or by confirmed facsimile; or (b) on the third business day following deposit in the United States mail, postage prepaid. 4.5. RELATIONSHIP OF THE PARTIES, The PARTIES are, and will at all times remain as to each other, wholly independent entities. No PARTY has the power to incur any debt, obligation, or liability on behalf of any other PARTY unless expressly provided to the contrary by this MOA. No employee, agent, or officer of a PARTY will be deemed for any purposes whatsoever to be an agent, employee or officer of another PARTY. 4.6. COOPERATION, FURTHER ACTS. The PARTIES agree to cooperate fully with one another to attain the purposes and objectives of this MOA. 4.7. INDEMNIFICATION. Each PARTY will be solely responsible and liable for its individual obligations under this MOA. Each PARTY agrees to indemnify, defend, and hold the other PARTIES harmless for all losses, claims, and liability including attorney fees and costs, arising to the extent of the negligence or willful misconduct of the indemnifying PARTY. 4.8. EXECUTION OF COUNTERPARTS. This MOA may be executed in counterparts, each of which will be deemed an original, but together will constitute one and the same instrument. 4.9. GOVERNING LAW. This MOA is governed by the laws of the State of California. 4.10. SEVERABILITY. If any provision of this MOA is determined by any court to be invalid, illegal, or unenforceable to any extent, the remainder of this MOA will not be affected will be construed as if the invalid, illegal or unenforceable provision had never been contained in this MOA. (Signatures on following pages) Page 10 of 14 253 IN WITNESS WHEREOF, the PARTIES have caused this MOA to be executed on their behalf as of the date specified below, respectively, as follows: CAMROSA WATER DISTRICT Date: APPROVED AS TO FORM: By: By: Chair, Board of Directors General Counsel CAMARILLO SANITARY DISTRICT Date: APPROVED AS TO FORM: By: By: Chair, Board of Directors General Counsel CITY OF CAMARILLO Date: APPROVED AS TO FORM: By: By: Mayor, City Council City Attorney CITY OF MOORPARK Date: APPROVED AS TO FORM: By: By: Mayor, City Council City Attorney CITY OF OXNARD Date: APPROVED AS TO FORM: By: By: Dr. Thomas E. Holden, Mayor City Attorney Page 11 of 14 254 CITY OF SIMI VALLEY Date: APPROVED AS TO FORM: By: By: Mayor, City Council City Attorney CITY OF THOUSAND OAKS Date: APPROVED AS TO FORM: By: By: Mayor, City Council City Attorney COUNTY OF VENTURA Date: APPROVED AS TO FORM: By: By: Chair, Board of Supervisors County Counsel VENTURA COUNTY WATERWORKS DISTRICT NO. 1 Date: APPROVED AS TO FORM: By: By: Chair, Board of Directors General Counsel UNITED STATES DEPARTMENT OF NAVY Date: APPROVED AS TO FORM: By: By: General Counsel VENTURA COUNTY AGRICULTURAL IRRIGATED LANDS GROUP, a subdivision of the Farm Bureau of Ventura County Date: APPROVED AS TO FORM: By: By: General Counsel Page 12 of 14 255 STATE OF CALIFORNIA Department of Transportation [Position vacant at time of MOA] Director of Transportation By District Director Approved as to Form & Procedure: By: Attorney Certified as to Funds: By: District Budget Manager Certified as to Financial Terms and Conditions: By: Accounting Administrator Page 13 of 14 256 LIST OF EXHIBITS Full document will be attached to Agreement and has been provided to City Council under separate cover Electronic version (PDF) is available upon request: 805-517-6257 A hard copy is available for public viewing at Moorpark City Hall Front Counter: 799 Moorpark Avenue Moorpark, CA 93021 Exhibit A: RWQCB Resolution 02-017 — Nutrient TMDL Exhibit B: RWQCB Resolution R4-2005-009 —Toxicity TMDL Exhibit C: RWQCB Resolution R4- 2005-010 — Pesticides TMDL Exhibit D: RWQCB Resolution R4 - 2006-012 — Metals TMDL Exhibit E: CCWMP TMDL Monitoring QAPP Exhibit E1: Metals TMDL Monitoring Plan. Exhibit E2: Salts TMDL Monitoring Plan Exhibit F: Program Implementation Formula —Voting Power Exhibit G: Estimate of Program Monitoring Costs Exhibit H: Estimate of Program Implementation Costs Exhibit I: PARTY Representatives Exhibit J: RWQCB Resolution R4-2007-007 —Trash TMDL Exhibit K: RWQCB Resolution R4-2007-016 — Salts TMDL Page 14 of 14 257 ITEM 1= Calleguas Creek TMDL MOA Amendment Documents Total Maximum Daily Load (TMD) Memorandum of Agreement (MOA) 6/30/2009 Without Strikeout Attachment 1 First Amended and Restated MEMORANDUM OF AGREEMENT Management, Funding and Cost Sharing for the Implementation of the Calleguas Creek Watershed Total Maximum Daily Load Program This First Amended and Restated Memorandum of Agreement ("MOA") is entered into effective 2009, by the Camrosa Water District, the Camarillo Sanitary District, the City of Camarillo, the City of Moorpark, the City of Oxnard, the City of Simi Valley, the City of Thousand Oaks, the County of Ventura, the Ventura County Waterworks District No. 1, the U.S. Department of Navy, the California Department of Transportation (collectively, the "Public Agencies") and the Ventura County Agricultural Irrigated Lands Group within the Calleguas Creek Watershed ("Ag Group"), a subdivision of the Farm Bureau of Ventura County ("Farm Bureau"), which together with the Public Agencies are collectively the "PARTIES". The PARTIES agree as follows: RECITALS A. On October 24, 2002, the California Regional Water Quality Control Board, Los Angeles Region ("RWQCB") adopted Resolution No. 2002-017 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to include a Total Maximum Daily Load ("TMDL") for Nitrogen Compounds and Related Effects in Calleguas Creek, a copy of which is attached and incorporated as Exhibit A. B. On July 7, 2005, the RWQCB adopted Resolution No. 2005-009 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to incorporate a TMDL for Toxicity, Chlorpyrifos, and Diazinon in Calleguas Creek, its tributaries and Mugu Lagoon a copy of which is attached and incorporated as Exhibit B. C. On July 7, 2005, the RWQCB adopted Resolution No. 2005-010 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to incorporate a TMDL for Organochlorine Pesticides, Polychorinated Biphenyls, and Siltation in Calleguas Creek, its tributaries and Mugu Lagoon, a copy of which is attached and incorporated as Exhibit C. D. On June 8, 2006, the RWQCB adopted Resolution No. 2006-012 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to incorporate a TMDL for Copper, Mercury, Nickel, and Selenium ("Metals") for Calleguas Creek, its tributaries, and Mugu Lagoon, a copy of which is attached and incorporated as Exhibit D. E. On June 7, 2007, the RWQCB adopted Resolution No. 2007-007 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to CW incorporate a TMDL for Trash in the Revolon Slough/Beardsley Wash Page 1 of 14 Subwatershed of Calleguas Creek, a copy of which is attached and incorporated as Exhibit J. F. On October 4, 2007, the RWQCB adopted Resolution No. 2007-016 adopting an Amendment to the Water Quality Control Plan for the Los Angeles Region to incorporate a TMDL for Boron, Chloride, TDS, and Sulfate ("Salts") in Calleguas Creek, its tributaries and Mugu Lagoon, a copy of which is attached and incorporated as Exhibit K. G. Eight of fourteen reaches in the Calleguas Creek Watershed ("CCW") are identified on the 2006 Clean Water Act Section 303(d) list of water-quality limited segments as impaired due to elevated levels of fecal coliform in water. The PARTIES may initiate further work on developing the Bacteria TMDL to address these impairments. H. RWQCB Resolutions 2002-017, 2005-009, 2005-010, 2006-012, 2007-007 and 2007-016 are jointly referred to herein as the "TMDLs". I. The TMDLs are not self-executing and not all the TMDLs have been incorporated into all the existing National Pollutant Discharge Elimination System Permits regarding Waste Discharger Requirements for Municipal Stormwater and Urban Runoff Discharges or Publicly Owned Treatment Works ("POTWs") or the Irrigated Lands Waiver(RWQCB Order No. R4-2005-0080) (jointly referred to herein as the "NPDES Permit") within the CCW in the manner required for the limits of the TMDLs to be legally enforceable. J. The TMDLs require a monitoring and reporting program plan to be submitted to the RWQCB for approval. K. On September 24, 2006 the PARTIES submitted to the RWQCB, in accordance with the requirements of the TMDLs, the Calleguas Creek Watershed Management Plan TMDL Monitoring and Reporting Program's Quality Assurance Program Plan ("QAPP") hereinafter referred to as "Monitoring Plan," which is attached and incorporated as Exhibit E. L. On October 15, 2007, the RWQCB approved the Monitoring Plan. M. On June 26, 2007, the PARTIES submitted to the RWQCB, in accordance with the requirements of the Metals TMDL, a Monitoring and Reporting Plan to be incorporated into the QAPP, which is attached and incorporated as Exhibit E1. N. On January 30, 2009, the RWQCB approved the Metals Monitoring Plan. O. On June 2, 2009 the PARTIES submitted to the RWQCB, in accordance with the requirements of the Salts TMDL, a Monitoring and Reporting Plan to be incorporated into the QAPP, which is attached and incorporated as Exhibit E2. L Page 2 of 14 P. The PARTIES' original MOA became effective on March 1, 2008, which established a joint monitoring and implementation program ("Program") that was consistent with the approved Monitoring Plan and consistent with the TMDLs. Q. The PARTIES desire to amend and restate in its entirety the MOA in order to continue the Program in a manner consistent with the approved Monitoring Plan and consistent with the TMDLs as they presently exist or are hereafter amended. R. The U.S. Department of the Navy("Navy") is an agency of the federal government, and therefore may be subject to limitations on its ability or requirement to comply with every provision of this MOA to the same extent that the Public Agencies are able to comply. These limitations are based upon, but not limited to, those identified in the federal Clean Water Act, the federal Antideficiency Act, the principle of sovereign immunity and the holdings of the United States Supreme Court, and other binding federal court decisions, as they interpret those sources of federal law. The limitations so mentioned include, but are not limited to, the availability of federal funding to pay for participation in this program, the ability of the Navy to participate directly in sampling, research or data gathering activities that are not located on Navy or federal lands or a point source of water discharge arising on Navy or federal lands, or other activities not specifically authorized by the federal Clean Water Act. To the extent the limitations described in this paragraph prevent the Navy from fully participating in the Program, it reserves the right, in its sole discretion, to participate in the Program and this MOA as a matter of comity. By entering into this MOA, the Navy does not authorize any of the Public �.. Agencies to exercise regulatory authority over it except to the extent expressly permitted by state or federal law. S. The PARTIES also acknowledge that the obligation of the California Department of Transportation ("Caltrans") to contribute funds under this MOA is subject to the appropriation of funds by the California Legislature and the allocation of funds by the California Transportation Commission. AGREEMENT ARTICLE I — PURPOSE OF AGREEMENT 1.1. PURPOSE. The purpose of this MOA is to cooperatively and voluntarily devise and jointly fund a coordinated Program that is consistent with the TMDLs, that implements the Monitoring Plan, and that establishes a mechanism for the sharing of the costs associated with the Program. The PARTIES acknowledge that this MOA and the work to be accomplished hereunder is undertaken on a voluntary basis since the TMDL allocations have not been incorporated into the NPDES permits or Irrigated Lands Waiver in the manner required by law to be enforceable. Page 3 of 14 1.2. MAXIMUM EXTENT PRACTICABLE STANDARD. Nothing in this MOA, nor any activity approved or carried out by the PARTIES hereunder, may be interpreted as a waiver of the position that the efforts undertaken by the PARTIES are not subject to the "Maximum Extent Practicable" standard set forth in the Clean Water Act (33 U.S.C. Section 1251 et seq.). ARTICLE II — RESPONSIBILITIES 2.1. PARTIES. A. The PARTIES agree to designate four discharger groups as follows: 1) POTWs, consisting of Camrosa Water District, Camarillo Sanitary District, Ventura County Waterworks District No. 1, and the Cities of Simi Valley and Thousand Oaks; 2) "Urban Dischargers," consisting of the Cities of Simi Valley, Thousand Oaks, Camarillo, Moorpark and Oxnard and the County of Ventura; 3) "Agricultural Dischargers," consisting of the Ag Group; and 4) "Other Dischargers," consisting of the U.S. Department of Navy and Caltrans. B. The PARTIES agree to form a "Management Committee" consisting of one representative each from the POTWs, Urban Dischargers and Other Dischargers groups and two representatives from the Agricultural Dischargers group. Each discharger group will select its applicable representatives and will also select an alternate representative to serve in the absence of each primary representative in whatever manner each group deems appropriate. The representatives of the discharger groups that consist of Public Agencies will be agency employees with appropriate technical backgrounds or responsibilities relevant to the purposes of the Program. The PARTIES authorize the Management Committee to oversee the Program and make decisions to assure the Program is carried out in a timely, accountable fashion. The PARTIES reserve the authority to adopt the annual budget, and task the Management Committee to diligently concur on a recommended budget annually in order to present a recommended budget to the PARTIES for adoption. The PARTIES further reserve the authority to make substantial changes to each budget and to review and adopt any budget increase during the fiscal year as may be required to implement the Program. C. Annually, the PARTIES must each contribute the funding allocated to their respective agency in accordance with Exhibit F and reflected in Exhibits G and H. Each PARTY's voting power and cost allocations will be based on such PARTY'S actual annual allocated costs. 2.2. MANAGEMENT COMMITTEE. A. The Management Committee will attempt to reach consensus on all issues. If a vote is necessary, each Management Committee member will have one vote. A motion requires four affirmative votes of the Management Committee for passage. The Management Committee representatives will serve a minimum Page 4 of 14 term of one fiscal year starting July 1 through June 30. Each discharger group �..., has the right to choose its representatives, including reappointing incumbent representatives, each fiscal year. B. The Management Committee will implement the Program following the principles and methods provided in this MOA. C. The Management Committee will recommend a budget for the PARTIES approval and funding as provided in this MOA. D. The Management Committee will manage Program task timelines and budgets as provided in the approved budget. The Management Committee will review and recommend budget variances and increases in funding to the PARTIES. E. The Management Committee will select the primary contractors ("Prime Contractors") to implement each element of the Program. The Prime Contractors will be responsible for technical program management in accordance with the requirements of the Monitoring Plans and TMDLs 2.3. FISCAL AGENT. A. The PARTIES will designate a "Fiscal Agent" for the PARTIES by a separate "Fiscal Agent Contract" which will be submitted for approval by the PARTIES. �. The Fiscal Agent will develop a recommended annual budget for review by the Management Committee, and ultimate approval by the PARTIES. The Fiscal Agent will contract with the selected Prime Contractors to implement the Program consisting of monitoring, laboratory services, data management, reporting, and implementation actions. The PARTIES agree to reimburse the Fiscal Agent for such management services as provided in the budget and the Fiscal Agent Contract. B. The Fiscal Agent must be a public agency and must serve a term of not less than one fiscal year. C. The then current Fiscal Agent may withdraw upon providing written notice to the Management Committee before March 1St prior to the next fiscal year. D. In the event that the Fiscal Agent withdraws from this MOA, another public agency may serve as successor Fiscal Agent. Any public agency willing to serve as successor Fiscal Agent may be nominated by another PARTY. Selection of a Fiscal Agent must be approved by the Management Committee. E. The Fiscal Agent must act in a timely manner to execute contracts with the Prime Contractor and all other contractors necessary to implement the Program. The Management Committee will select all contractors, and the Fiscal Agent will contract with those selected contractors. Upon the selection of a new Fiscal Page 5 of 14 Agent, if necessary, the new Fiscal Agent will renegotiate all existing contracts to ensure that they are properly assigned to the new Fiscal Agent. F. The Fiscal Agent will be the treasurer of Program funds. The Fiscal Agent, in accordance with generally accepted accounting procedures, must keep the Program funds segregated from any other funds administered by the Fiscal Agent; must credit the Program with appropriate interest income earned on Program funds in each fiscal year; and may not expend any funds except in accordance with the annual budget approved by the Management Committee or as otherwise directed by the Management Committee. G. By February 1 of each year, the Fiscal Agent must cause to be prepared a projected detailed annual budget for review and recommended approval by the Management Committee, and ultimate approval by the PARTIES, for the following fiscal year, as described under Section 3.1.6. The Fiscal Agent will retain all fiscal records for five years and make those records available for review by any PARTY upon request. H. The Fiscal Agent must provide a copy of any contract executed on behalf of the PARTIES to the Management Committee upon request. I. The Fiscal Agent may request under its agreement with the PARTIES, and as part of the annual Program budget, reimbursement for reasonable and customary costs incurred in providing the services under this MOA. Reimbursement to the Fiscal Agent will be subject to Management Committee review and approval as part of the Program budget. J. The Fiscal Agent will cause to be prepared an annual audit of expenditures and a report regarding the Program and submit such audit and report to the Management Committee within 90 days of the close of each fiscal year. 2.4. DOCUMENTATION. The PARTIES agree to provide all readily available information and documentation that is deemed necessary to perform the Program. 2.5. GRANT OF ACCESS RIGHTS. During the term of this MOA, the PARTIES (including all members of the Ag Group) will grant the right of access and entry to all monitoring locations to the Prime Contractors or any other contractor retained by the Fiscal Agent at all reasonable times for the purposes of collecting monitoring data consistent with the Monitoring Plan subject to all applicable laws of such PARTY. Any Public Agency or Prime Contractor intending to enter onto another PARTY's right-of-way, property or easement must first make a written request to the affected PARTY, identifying the site location, extent of access by persons (and equipment if any), dates and times of entry, as well as an explanation of the Page 6 of 14 purpose of that entry. The affected PARTY will then determine, within 10 working days, if that entry will require a formal encroachment permit or other approval. If a formal permit or approval is required based on that PARTY'S applicable law, the Public Agency or Prime Contractors must obtain such permit or approval. If a formal permit or approval is not required based on that PARTY's applicable law, the affected PARTY may still condition the right of entry on the accompaniment of a representative of the affected PARTY, who may restrict or limit the access to those persons deemed necessary at the sole discretion of the affected PARTY. ARTICLE III — FUNDING, COST & DATA SHARING 3.1. FUNDING. A. The PARTIES agree to provide funding for the costs of the Program including the services performed by the Prime Contractor and any other contractor retained by the Fiscal Agent consistent with each PARTY's percentage allocation as set forth in Exhibit F and reflected in Exhibits G and H. B. The monitoring cost estimate for the current Program year is attached as Exhibit G. The implementation cost estimate for the current Program year is attached as Exhibit H. If the actual budget exceeds the projected costs in Exhibits G and H, the Management Committee will develop a recommendation and call for a vote of the PARTIES to approve a revised budget. Each Program year, the applicable `o.. Prime Contractor and the Fiscal Agent will prepare a draft annual budget. The Fiscal Agent will facilitate budget review by the Management Committee and, upon the Management Committee reaching agreement, presentation of the recommended annual budget to the PARTIES. Once the PARTIES reach a two-thirds majority agreement on the recommended annual budget based on the PARTIES' percentage allocations, the budget will be considered an approved annual budget for the following fiscal year. The applicable Prime Contractor and Fiscal Agent will be provided a draft budget deadline by the Management Committee to provide sufficient time for review of the recommended Annual Budget to allow for its timely passage prior to June 30 annually. C. The Fiscal Agent will provide timely notice of fund transfers necessary to meet budgeted activities. D. The PARTIES understand and agree that the Farm Bureau has no specific or direct liability for the funds to be paid by the Ag Group within the CCW pursuant to this MOA. The Farm Bureau is a facilitator with the RWQCB in an Irrigated Agricultural Lands Waiver Program for properties within Ventura County, including properties within the CCW. The Farm Bureau cannot ensure that all irrigated agricultural property within the CCW is participating in, or will participate in the Ag Group. The Ag Group is the entity from which the Farm Bureau will r- collect funds due under this MOA. Page 7 of 14 In such capacity as a facilitator, the Farm Bureau cannot ensure or guarantee that all funds due from agriculture pursuant to this MOA will be collected. The Farm Bureau will use its best efforts to secure the greatest amount of participation by agricultural property within the CCW and the collection of funds due and owing under this MOA. E. To the extent a PARTY fails to timely pay all or a portion of such PARTY's cost allocation, the Management Committee must direct the applicable Prime Contractors to reduce to the extent feasible the Program monitoring and implementation activities that directly apply to such PARTY in proportion to the reduction in contributions from such PARTY. Under no circumstances will any PARTY be required to increase its contribution based on the failure of another PARTY to pay all or a portion of its cost allocation. 3.2. CONTRACT FOR SERVICES. A. The Management Committee will assist the Fiscal Agent in issuing requests for proposals, negotiating contracts, and selecting the Prime Contractors and any other contractors. If bids for the initial year of any subsequent fiscal year costs exceed the estimates in Exhibits G and H by more than ten percent (10%), the Management Committee must notify the PARTIES and request the PARTIES' direction on approval of additional funds. Payment for contract activities may only be made upon review and approval by the Management Committee of invoices submitted by the Prime Contractors and all other contractors. B. All Prime Contractors and all other contractors will be retained by contract with the Fiscal Agent. The Fiscal Agent will disburse funds to contractors within 30 days after approval of the invoice by the Management Committee. The Fiscal Agent will perform this role for the administrative convenience of the PARTIES. C. All costs for the Program are to be shared based upon each PARTY's percentage allocation as set forth in Exhibit F. Fifty percent (50%) of each PARTY's share of first year costs as set forth in Exhibits G and H will be invoiced by, and is due and payable to the Fiscal Agent from each PARTY upon the effective date of this MOA, and the remaining fifty percent (50%) is due after six months from the effective date of the MOA. Subsequent annual budget costs will be due and payable to the Fiscal Agent within 45 days of receipt of the invoice, or upon such other terms as the Management Committee may approve. 3.3 DATA SHARING. It is the intent of the PARTIES that the monitoring data collected will remain in draft form until released to the RWQCB under the PARTIES' NPDES permits and the Irrigated Lands Waiver. Prior to such disclosure, no PARTY may share the monitoring data generated from the Program with members of the public without first obtaining permission from the Management Committee. Page 8 of 14 ARTICLE IV— GENERAL PROVISIONS 4.1. TERM. The effective date of this MOA is the date first above written. The initial term of the MOA will continue for a period of five years from the effective date. Thereafter, the MOA will automatically renew upon the anniversary of the effective date upon consensus of the PARTIES until terminated in the manner provided for in this MOA. 4.2. WITHDRAWAL. A. Any PARTY may withdraw from this MOA by providing written notice to the Management Committee on or before: (i) March 1 in any year; (ii) 30 days from notice of the Management Committee's recommended annual budget; or (iii) 15 days from any other PARTY's notice of withdrawal. If notice is timely given, the withdrawal will become effective at the beginning of the next fiscal year. B. Any PARTY that withdraws from this MOA will remain liable for that PARTY's share of the costs under this MOA through the end of the then current fiscal year. C. The withdrawing PARTY will be responsible for all lawfully assessed penalties on such PARTY as a consequence of and subsequent to the withdrawal. The withdrawing PARTY will also be responsible for fulfilling all requirements of the Program applicable to such withdrawing PARTY. D. Upon withdrawal or delay in adoption of the MOU by any PARTY, the Management Committee will revise the cost sharing formula set forth in Exhibit F to equitably reduce or reapportion the withdrawing PARTY's contribution among the remaining PARTIES. 4.3. AMENDMENTS. A. During the term of this MOA, any PARTY may request that the other PARTIES negotiate, in good faith, modifications to the MOA that may be reasonably necessary because of changed circumstances. B. Any amendment to this MOA must be in writing and must be consented to by all PARTIES. Upon such consent, the amendment must be executed by each Party within three months of notice by the Management Committee. 4.4. NOTICES. Any notices, bills, invoices, or reports relating to this MOA, and any request, demand, statement or other communication required or permitted hereunder .� must be in writing and must be delivered to the representatives of the PARTIES Page 9 of 14 at the addresses set forth in Exhibit I attached hereto. A notice will be deemed to �-- have been received on (a) the day of delivery, if delivered by hand during regular �..• business hours or by confirmed facsimile; or (b) on the third business day following deposit in the United States mail, postage prepaid. 4.5. RELATIONSHIP OF THE PARTIES. The PARTIES are, and will at all times remain as to each other, wholly independent entities. No PARTY has the power to incur any debt, obligation, or liability on behalf of any other PARTY unless expressly provided to the contrary by this MOA. No employee, agent, or officer of a PARTY will be deemed for any purposes whatsoever to be an agent, employee or officer of another PARTY. 4.6. COOPERATION, FURTHER ACTS. The PARTIES agree to cooperate fully with one another to attain the purposes and objectives of this MOA. 4.7. INDEMNIFICATION. Each PARTY will be solely responsible and liable for its individual obligations under this MOA. Each PARTY agrees to indemnify, defend, and hold the other PARTIES harmless for all losses, claims, and liability including attorney fees and costs, arising to the extent of the negligence or willful misconduct of the indemnifying PARTY. 4.8. EXECUTION OF COUNTERPARTS. This MOA may be executed in counterparts, each of which will be deemed an original, but together will constitute one and the same instrument. 4.9. GOVERNING LAW. This MOA is governed by the laws of the State of California. 4.10. SEVERABILITY. If any provision of this MOA is determined by any court to be invalid, illegal, or unenforceable to any extent, the remainder of this MOA will not be affected will be construed as if the invalid, illegal or unenforceable provision had never been contained in this MOA. (Signatures on following pages) Page 10 of 14 «.. IN WITNESS WHEREOF, the PARTIES have caused this MOA to be executed on their behalf as of the date specified below, respectively, as follows: CAMROSA WATER DISTRICT Date: APPROVED AS TO FORM: By: By: Chair, Board of Directors General Counsel CAMARILLO SANITARY DISTRICT Date: APPROVED AS TO FORM: By: By: Chair, Board of Directors General Counsel CITY OF CAMARILLO Date: APPROVED AS TO FORM: By: By: Mayor, City Council City Attorney CITY OF MOORPARK Date: APPROVED AS TO FORM: By: By: Mayor, City Council City Attorney CITY OF OXNARD Date: APPROVED AS TO FORM: By: By: Dr. Thomas E. Holden, Mayor City Attorney Page 11 of 14 CITY OF SIMI VALLEY �.. Date: APPROVED AS TO FORM: By: By: Mayor, City Council City Attorney CITY OF THOUSAND OAKS Date: APPROVED AS TO FORM: By: By: Mayor, City Council City Attorney COUNTY OF VENTURA Date: APPROVED AS TO FORM: By: By: Chair, Board of Supervisors County Counsel VENTURA COUNTY WATERWORKS DISTRICT NO. 1 Date: APPROVED AS TO FORM: By: By: Chair, Board of Directors General Counsel UNITED STATES DEPARTMENT OF NAVY Date: APPROVED AS TO FORM: By: By: General Counsel VENTURA COUNTY AGRICULTURAL IRRIGATED LANDS GROUP, a subdivision of the Farm Bureau of Ventura County Date: APPROVED AS TO FORM: By. By: General Counsel Page 12 of 14 STATE OF CALIFORNIA Department of Transportation [Position vacant at time of MOA] Director of Transportation By District Director Approved as to Form & Procedure: By: Attorney Certified as to Funds: By: District Budget Manager Certified as to Financial Terms and Conditions: By: Accounting Administrator Cw Page 13 of 14 LIST OF EXHIBITS Full document will be attached to Agreement and has been provided to City Council under separate cover Electronic version (PDF) is available upon request: 805-517-6257 A hard copy is available for public viewing at Moorpark City Hall Front Counter: 799 Moorpark Avenue Moorpark, CA 93021 Exhibit A: RWQCB Resolution 02-017 — Nutrient TMDL Exhibit B: RWQCB Resolution R4-2005-009 —Toxicity TMDL Exhibit C: RWQCB Resolution R4- 2005-010 — Pesticides TMDL Exhibit D: RWQCB Resolution R4 - 2006-012 — Metals TMDL Exhibit E: CCWMP TMDL Monitoring QAPP a.. Exhibit E1: Metals TMDL Monitoring Plan. Exhibit E2: Salts TMDL Monitoring Plan Exhibit F: Program Implementation Formula —Voting Power Exhibit G: Estimate of Program Monitoring Costs Exhibit H: Estimate of Program Implementation Costs Exhibit I: PARTY Representatives Exhibit J: RWQCB Resolution R4-2007-007 —Trash TMDL Exhibit K: RWQCB Resolution R4-2007-016 — Salts TMDL Page 14 of 14 Exhibit A — Nitrogen State of California California Regional Water Quality Control Board Los Angeles Region Resolution No. 02-017 October 24, 2002 Exhibit A - State of California California Regional Water Quality Control Board,Los Angeles Region RESOLUTION NO.02-017 October 24,2M Amendment to the Water Quality Control Plan for the Los Angeles Region to include a TMDL for Nitrogen Compounds and Related Effects in Calleguas Creek. WHEREAS;the California Regional Water Quality ControTBoard,Los Angeles Region,finds that: 1. The federal Clean Water Act(CWA)requires the California Regional Water Quality Control Board(Regional Board)to develop water quality standards which include beneficial use designations and criteria to protect beneficial uses for each water body found within its region. 2. The Regional Board carries out its CWA responsibilities through California's Porter- Cologne Water Quality Control Act and establishes water quality objectives designed to protect beneficial uses contained in the Water Quality Control Plan for the Los Angeles Region(Basin Plan). 3. Section 303(d)of the CWA requires states to identify and to prepare a list of water bodies that do not meet water quality standards and then to establish load and waste load allocations,or a total maximum daily load(TMDL),for each water body that will ensure attainment of water quality standards and then to incorporate those allocations into their water quality control plans. 4. Calleguas Creek was listed on California's 1998 section 303(d)list,due to impairment for nitrogen compounds and their effects that do not protect the most sensitive beneficial uses of the water body. 5. A consent decree between the U.S. Environmental Protection Agency(USEPA),Heal the Bay,Inc., and BayKeeper,Inc.was approved on March 22, 1999. The court order directs the USEPA to complete TMDLs for all the Los Angeles Region's impaired waters within 13 years. 6. The elements of a TMDL are described in 40 CFR 130.2 and 130.7 and section 303(d)of the CWA,as well as in USEPA guidance documents(e.g.,USEPA,19911). A TMDL is defined as"the sum of the individual waste load allocations for point sources and load allocations for nonpoint sources and natural background"(40 CFR 130.2). Regulations further stipulate that TMDLs must be set at"levels necessary to attain and maintain the applicable narrative and numeric water quality standards with seasonal variations and a margin of safety that takes into account any lack of knowledge concerning the relationship between effluent limitations and water quality"(40 CFR 1303(c)(1)). The regulations in 40 CFR 130.7 also state that August 30,2002 Revised:October 24,2002 J Resolution No.02-017 Page 2 . �.- TMDLs shall take into account critical conditions for stream flow,loading and water quality parameters. 7. Upon establishment of TMDLs by the State or USEPA,the State is required to incorporate the TMDLs along with appropriate implementation measures into the State Water Quality Management Plan(40 CFR 130.6(cxl), 130.7). The Basin Plan, and applicable statewide plans serve as the State Water Quality Management PIans governing the watersheds under the jurisdiction of the Regional Board. 8. Calleguas Creek is located in Ventura County,California. It reaches from the Simi Hills east of the City of Simi Valley to Mugu Lagoon south of the City of Oxnard. 9. The Regional Board's goal in establishing the above-mentioned TMDL is to maintain the warm water fish and wildlife habitat(WARM,WILD)and groundwater recharge (GWR)beneficial uses of Calleguas Creek as established in the Basin Plan. Additionally,ammonia is known to cause toxicity to aquatic organisms. 10.Interested persons and the public have had reasonable opportunity to participate in review of the amendment to the Basin Plan. Efforts to solicit public teview and comment include,ten public workshops held between January 1999 and February 2002;public notification 45 days preceding the Board hearing, and responses from the Regional Board staff to oral and written comments received from the public. 11.The amendment is consistent with the State Antidegradation Policy(State Board Resolution No.68-16),in that the changes to water quality objectives(i)consider maximum benefits to the people of the state,(ii)will not unreasonably affect present and anticipated beneficial use of waters,and(iii)will not result in water quality less than that prescribed in policies. Likewise,the amendment is consistent with the federal Antidegradation Policy(40 CFR 131.12). 12.The basin planning process has been certified as fimctionally equivalent to the California Environmental Quality Act requirements for preparing environmental documents and is,therefore,exempt from those requirements(Public Resources Code section 21000 et seq.),and the required environmental documentation and environmental checklist have been prepared. 13.The proposed amendment results in no potential for adverse effect(de minim is finding),either individually or cumulatively,on wildlife. 14.The regulatory action meets the"Necessity"standard of the Administrative Procedures Act,Government Code section 11353,subdivision(b). 15.The Basin Plan amendment incorporating a TMDL for nitrogen compounds and related effects for the Calleguas Creek watershed must be submitted for review and approval by the State Water Resources Control Board(State Board),the State Office of Administrative Law(OAL),and the US Environmental Protection Agency August 30,2002 Revised: October 24,2002 Resolution No.02-017 Page 3 (USEPA). The Basin Plan amendment will become effective upon approval by OAL and USLPA.A Notice of Decision will be filed. THE MFORE,be it resolved that pursuant to Section 13240 and 13241 of the Water Code,the Regional Board hereby amends the Basin Plan as follows: 1. Pursuant to sections 13240 and 13241 of the California Water Code,the Regional Board,after considering the entire record,including oral testimony at the hearing, hereby adopts the amendment to Chapter 7 the Water Quality Control Plan for the Los Angeles Region to incorporate the elements of the Calleguas Creek Nitrogen Compounds and Related Effects TMDL as set forth in Attachment A hereto. 2. The Executive Officer is directed to forward copies of the Basin Plan amendment to the SWRCB in accordance with the requirements of section 13245 of the California Water Code. 3. The Regional Board requests that the SWRCB approve the Basin Plan amendment in accordance with the its of sections 13245 and 13246 of the California Water Code and forward it to OAL and the USEPA. 4. If during its approval process the SWRCB or OAL determines that minor,non- substantive corrections to the language of the amendment are needed for clarity or consistency,the Executive Officer may make such changes,and shall inform the Board of any such changes. 5. The Executive Officer is authorized to sign a Certificate of Fee Exemption. 6. Amend the text in the Basin Plan,Plans and Policies(Chapter 5)to add: "Resolution No.02-017. Adopted October 24,2002. 'Amendment to include a TMDL for Nitrogen Compounds and Related Effects for Calleguas Creek' The resolution proposes a TMDL for nitrogen compounds and related effects in Calleguas Creek." 7. The Basin Plan amendment set forth in Attachment A shall only become effecti ve if the water quality objectives revised by Regional Board Resolution 2002-011,or equivalent water quality objectives,have been approved by the OAL and USEPA, and are consistent with the TMDL. August 30,2002 - Revised:October 24,2002 Resolution No.02-017 Page 4 li Dennis A.Dickerson,Executive Officer,do hereby certify that the foregoing is a full, true,and correct copy of a resolution adopted by the California Regional Water Quality Control Board,Los Angeles Region,on October 24,2002. Dennis A.Dickerson Executive Officer August 30,2002 Revised:October 24,2002 Exhibit A — Nitrogen Attachment A to Resolution No. 02-017 Proposed Amendment to the Water Quality Control Plan Los Angeles Region Basin Plan Amendment Exhibit A Attachment A to Resolution No.02-017 �r Proposed Amendment to the Water Quality Control Plan—Los Angeles Region to Incorporate the Calleguas Creek Nitrogen Compounds and Related Effects TMDL Adopted by the California Regional Water Quality Control Board,Los Angeles Region on October 24, 2002. Amendments Table of Contents Add: Chapter 7. Total Maximum Daily Loads (TMDLs) 7-7 Calleguas Creek Nitrogen Compounds and Related Effects TMDL List of Figures,Tables,and Inserts Add: Chapter 7. Total Maximum Daily Loads (TMDLs) Tables 7-7 Calleguas Creek Nitrogen Compounds and Related Effects TMDL 7-7.1. Calleguas Creek Nitrogen Compounds and Related Effects TMDL: Elements 7-7.2. Calleguas Creek Nitrogen Compounds and Related Effects TMDL: Implementation Schedule Chapter 7. Total Maximum Daily Loads (TMDLs) Calleguas Creek Nitrogen Compounds and Related Effects TMDL This TMDL was adopted by: The Regional Water Quality Control Board on October 24, 2002. This TMDL was approved by: The State Water Resources Control Board on March 19, 2003. The Office of Administrative Law on June 5, 2003. The U.S. Environmental Protection Agency on June 20,2003. August 30,2002 Revised: October 24, 2002 Resolution No.02-017 Page 2 Table 7-7.1. Calleguas Creek Nitrogen Compounds and Related Effects TMDL: Elements ,c 3W r�s rya wrl" nma. m Problem ' Elevated nitrogen concentrations (ammonia,nitrite and nitrate)are Statement causing impairments of the warm water fish and wildlife habitat, and groundwater recharge beneficial uses of Calleguas Creek. Nitrite and nitrate contribute to eutrophic effects such as low dissolved oxygen and algae growth. Ammonia contributes to toxicity. Numeric Target Numeric targets for this TMDL are listed as follows: (Interpretation of the numeric 1. Total Ammonia as Nitrogen (NH3-N) water quality NH3-N concentration(mg/L) objective, used One-hour Thirty-day to calculate the Reach average average load * Mugu Lagoon 8.1 2.9 allocations) * Calleguas Creek,South 5.5 2.4 * Calleguas Creek,North 8.4 3.0 * Revlon Slough 5.7 2.9 * Beardsley Channel 5.7 2.9 * Arroyo Las Posas 8.1 2.6 * Arroyo Simi 4.7 2.4 * Tapo Canyon 3.9 1.9 * Conejo Creek(Confluence with Calleguas 9.5 3.5 Creek to Santa Rosa Rd.) * Conejo Creek(Santa Rosa Road 8.4 3.4 to Thousand Oaks City Limit) * Conejo Creek,Hill Canyon Reach 8.4 3.1 * Conejo Creek,North Fork 3.2 1.7 * Arroyo Conejo(South Fork Conejo Creek) 5.1 3.4 * Arroyo Santa Rosa 5.7 2.4 2. Nitrate and nitrite as nitrogen (NO3-N and NO2-N) Constituent Concentration(mg/L) • NO3-N 10 • NOZ-N 1 • NO3-N+NO2-N 10 Numeric targets to address narrative objectives required to protect warm freshwater and wildlife habitat are intended to implement the narrative objectives and may be revised based on the results of monitoring and special.studies conducted pursuant to the implementation plan. August 30, 2002 Revised: October 24, 2002 Resolution No. 02-017 Page 3 Source Analysis The principal sources of nitrogen into Calleguas Creek are discharges from the POTWs in the watershed and runoff from agricultural activities in the watershed. Linkage Linkage between nitrogen sources and the in-stream water quality was Analysis established through a mass continuity model based on an evaluation of recent hydrodynamic and water quality data. Waste Load The waste load allocations (Wi.As) are as follows: Allocations (for Concentration(mg/L) point sources) NHj-N NO3-N NO2-N NO3-N+NO2-N MDEL' AMEL2 Daily WLA POTWS (mg/L) (lb/day) (mg/L) • Hill Canyon WTP3 5.6 3.1 254 9.0 0.9 9.0 • Simi Valley WQCF4 3.3 2.4 220 9.0 0.9 9.0 • Moorpark WTP 6.4 2.6 59 9.0 0.9 9.0 • Camarillo WRP5 7.8 3.5 177 9.0 0.9 9.0 • Camrosa WRF 6 7.2 3.0 33 9.0 0.9 9.0 Load Allocation The source analysis indicates that agricultural discharge is the major non- (for non point point source of oxidized nitrogen to Calleguas Creek and its tributaries. sources) This source is particularly significant in Revolon Slough and other agricultural drains in the lower Calleguas watershed where there are no point sources of ammonia and oxidized nitrogen. Load allocations for non-point sources are: NO3-N+NO2-N Nonpoint Source (mg/L) Agriculture 9.0 Other Nonpoint Source 9.0 Implementation 1. Refer to Table 7-7.2 2. Several of the POTWs in the Calleguas Creek watershed will require additional time to meet the nitrogen (NO3-N, NO2-N, and NO3-N+ NO2-N) waste load allocations. To allow time to meet the nitrogen waste load allocations, interim limits will be allowed for a period of four years from the effective date of the TMDL during which the POTWs will be required to meet the effluent limit for NO3-N+NO2- N only. Effluent limits for the individual compounds NO3-N and 1 MDEL.Maximum daily effluent limitation 2 AMEL:Average monthly effluent limitation 3 WTP:Wastewater Treatment Plant 4 WQCF:Water Quality Control Facility 5 WRP:Water Reclamation Plant 6 WRF:Water Reclamation Facility August 30,2002 Revised: October 24, 2002 Resolution No. 02-017 Page 4 NO2-N are not required during the interim period. �✓ Interim Limits for NO3-N+NO2-N Monthly Average Daily Maximum POTWs (mg/L) (mg/L) • Hill Canyon WTP 36.03 38.32 • Simi Valley WQCF 31.60 32.17 • Moorpark WTP 31.5 32.01 • Camarillo WRP 36.23 37.75 *The monthly average and daily maximum interim limits are based on the 95E'and 991,percentiles of effluent performance data reported in the Calleguas Creek Characterization Study 3. The waste load allocations for ammonia will be applicable on the effective date of the TMDL. Interim limits for ammonia will be applicable for no more than 2 years starting from October 24, 2002 for POTWs that are not able to achieve immediate compliance with the assigned waste load allocations. The interim limits for ammonia may be established at the discretion of the Regional Board when a POTW's NPDES permit is reissued. Margin of An implicit margin of safety is incorporated through conservative model Safety assumptions and statistical analysis. In addition, an explicit margin of safety is incorporated by reserving 10% of the load, calculated on a concentration basis, from allocation to POTW effluent sources. Seasonal A low flow critical condition is identified for this TMDL based on a Variations and review of flow data for the past twenty years. This flow condition was Critical identified because less assimilative capacity is available to dilute effluent Conditions discharge. August 30, 2002 Revised: October 24, 2002 Resolution No. 02-017 Page 5 Table 7-7.2. Implementation Schedule 1. WLA for ammonia apply to POTWs. Effective Date of TMDL 2. Interim Limits for NO3-N+NO2-N apply to POTWs. 3. Formation of Nonpoint Source BMP Evaluation Committee. 4. Submittal of Non point Source Monitoring 1 year after Effective Date Workplan by Calleguas Creek Watershed of TMDL Management Plan — Water Resources/Water Quality(CCWMP) Subcommittee. This monitoring is to evaluate nutrient loadings associated with agricultural drainage and other nonpoint sources. The monitoring program will include both dry and wet weather discharges from agricultural, urban and open space sources. In addition, groundwater discharge to Calleguas Creek will also be analyzed for nutrients to determine the magnitude of these loading and the need for load allocations. A key objective of these special studies will be to determine the effectiveness of agricultural BMPs in reducing nutrient loadings. Consequently, flow and analytical data for nutrients will be required to estimate loadings from nonpoint sources. 5. Submittal of Watershed Monitoring Workplan by CCWMP Subcommittee. In addition to the analytical parameters and flow data requirements, the watershed monitoring program will establish sampling locations from which representative samples can be obtained, including all listed tributaries. Monitoring results will be compared to the numeric instream targets identified in this TMDL to determine the effectiveness of the TMDL. Data on the extent and distribution of algal mats, scum and odors will be included in the watershed monitoring program. The data will be The CCWMP Subcommittee has offered to complete tasks 4 through 9 and 11. In the event the CCWMP Subcommittee fails to timely complete these tasks,the Regional Board will consider whether to amend this Implementation Plan to assign tasks to responsible dischargers in the regulatory approach. The Regional Board also reserves its right to take any other appropriate actions including,but not limited to,exercising its authorities under Water Code section 13267. August 30,2002 Revised: October 24, 2002 Resolution No. 02-017 Page 6 *%o/ BMW_ s_ used to provide further verification of the model and refine the TMDL to address nutrient effects as appropriate. 6. Submittal of Special Studies Workplan by CCWMP Subcommittee. These special studies include: Monitoring of minor point sources for nutrients to confirm assumptions that the loadings from these sources are.minor; Monitoring of greenhouse discharges and runoff to assess loadings from these sources; Monitoring of groundwater extraction and discharges in the Arroyo Santa Rosa subwatershed and other areas that may add significant nutrient loadings to Calleguas Creek; and Additional studies of the type and extent of algae impairment in Calleguas Creek and Mugu Lagoon. 7. Complete Special Studies for minor sources, 3 years after Effective Date greenhouses, and groundwater loadings. of TMDL �. 8. Completion of ammonia Water Effect Ratio (WER) studies. 9. Complete planning and preparation for construction of TMDL remedies to reduce non- point source nitrogen loads. 10. Interim Limits for NO3-N+NO2-N expire and 4 years after Effective Date WLAs for NO3-N, NO2-N, NO3-N+NO2-N apply of TMDL to POTWs. 11. Complete Special Studies for algae impairments of 5 years after Effective Date Calleguas Creek, its tributaries and Mugu Lagoon. of TMDL 12. Regional Board consideration of revised water 6 years after Effective Date quality objectives for nitrogen compounds based of TMDL on monitoring data, special studies, and ammonia WER, if appropriate. 13. Final achievement of ammonia and oxidized 7 years after Effective Date nitrogen standards. of TMDL August 30, 2002 Revised: October 24, 2002 Exhibit B — Toxicity State of California California Regional Water Quality Control Board Los Angeles Region Resolution No. R4-2005-009 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a Total Maximum Daily Load (TMDL) for Toxicity, Chlorpyrifos, and Diazinon in Calleguas Creek Its Tributaries and Mugu Lagoon Exhibit B �., State of California California Regional Water Quality Control Board, Los Angeles Region RESOLUTION NO. R4-2005-009 July 7,2005 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a Total Maximum Daily Load for Toxicity,Chlorpyrifos,and Diazinon in Calleguas Creek its Tributaries and Mugu Lagoon WHEREAS, the California Regional Water Quality Control Board, Los Angeles Region, finds that: 1. The Federal Clean Water Act(CWA)requires the California Regional Water Quality Control Board, Los Angles Region (Regional Board) to develop water quality objectives, which are sufficient to protect beneficial uses for each water body found within its region. 2. A consent decree between the U.S. Environmental Protection Agency (USEPA), Heal the Bay, Inc. and BayKeeper,Inc. was approved on March 22, 1999. This court order directs the USEPA to complete Total Maximum Daily Loads(TMDLs)for all impaired waters within 13 years. A schedule was established in the consent decree for the completion of the first 29 TMDLs within 7 years,including completion of a TMDL to reduce toxicity,chlorpyrifos,and diazinon in the Calleguas Creek Watershed by March 22, 2006. The remaining TMDLs will be scheduled by Regional Board staff within the 13-year period. 3. The elements of a TMDL are described in 40 CFR 130.2 and 130.7 and section 303(d)of the CWA, as well as in USEPA guidance documents (Report No. EPA/440/4-91/001). A TMDL is defined as the sum of the individual waste load allocations for point sources, load allocations for nonpoint sources and natural background(40 CFR 130.2). Regulations further- stipulate that TMDLs must be set at levels necessary to attain and maintain the applicable narrative and numeric water quality standards with seasonal variations and a margin of safety that takes into account any lack of knowledge concerning the relationship between effluent limitations and water quality (40 CFR 130.7(c)(1)). The regulations in 40 CFR 130.7 also state that TMDLs shall take into account critical conditions for stream flow, loading and water quality parameters. 4. The numeric targets in this TMDL are not water quality objectives and do not create new bases for enforcement against dischargers apart from the water quality objectives they translate. The targets merely establish the bases through which load allocations (LAs) and waste load allocations (WLAs) are calculated. WLAs are only enforced for a discharger's own discharges, and then only in the context of its National Pollutant Discharge Elimination System(NPDES)permit, which must be consistent with the assumptions and requirements of the WLA. The Regional Board will develop permit requirements through a subsequent permit action that will allow all interested persons, including but not limited to municipal storm water dischargers,to provide comments on how the WLA will be translated into permit requirements. 5. Upon establishment of TMDLs by the State or USEPA, the State is required to incorporate the TMDLs along with appropriate implementation measures into the State Water Quality J Resolution No.R4-2005-009 Page 2 Management Plan (40 CFR 130.6(c)(1), 130.7). This Water Quality Control Plan for the Los Angeles Region (Basin Plan), and applicable statewide plans, serves as the State Water Quality Management Plans governing the watersheds under the jurisdiction of the Regional Board. 6. The SWRCB adopted Policy for Implementation of Toxics Standards for Inland Surface Waters,Enclosed Bays, and Estuaries of California(also known as the State Implementation Plan or SIP)on March 2, 2000. The SIP was amended by Resolution No. 2000-30, on April 26,2000,and the Office of Administrative Law approved the SIP on April 28, 2000..The SIP applies to discharges of toxic pollutants in the inland surface waters, enclosed bays and estuaries of California which are subject to regulation under the State's Porter-Cologne Water Quality Control Act (Division 7 of the Water Code) and the Federal Clean Water Act. This policy also establishes the following: implementation provisions for priority pollutant criteria promulgated by USEPA through the CTR and for priority pollutant objectives established by Regional Water Quality Control Boards in their water quality control plans(Basin Plans) and chronic toxicity control provisions. 7. On May 18, 2000, the U.S. EPA promulgated the numeric criteria for priority pollutants for the State of California, known as the California Toxics Rule (CTR) and as codified as 40 CFR section 131.38. 8. The Calleguas Creek Watershed is located in southeast Ventura County, California, and in a small portion of western Los Angeles County, and drains an area of approximately 343 square miles from the Santa Susana Pass in the east, to Mugu Lagoon in the southwest. Current land use is approximately 26 percent agriculture, 24 percent urban, and 50 percent open space. The tributaries and the streams of the Calleguas Creek Watershed are divided �. into fourteen segments, or reaches. The 2002 Clean Water Act 303(d) list identified six reaches as impaired for water column toxicity,two for sediment toxicity,two for chlorpyrifos in fish tissue, and one for organophosphate pesticides in water. These listings were approved by the State Water Resources Control Board on February 4,2003. 9. The Regional Board's goal in establishing the Calleguas Creek Toxicity TMDL is to determine and set forth measures needed to prevent impairment of water quality due to water column toxicity in all impaired reaches by requiring reductions in diazinon and chlorpyrifos from both point and non-point sources, and by developing a numeric target for unknown causes of toxicity. 10. Calleguas Creek stakeholders have been actively engaged with US EPA and the Regional Board on a variety of watershed planning initiatives in the Calleguas Creek Watershed. Key stakeholders have formed the Calleguas Creek Watershed Management Plan (CCWMP), an established,stakeholder-led watershed management group that has been continually operating since 1996. The Calleguas Creek Watershed Management Plan has broad participation from Federal, State and County agencies, municipalities, POTWs, water purveyors, groundwater management agencies, and agricultural and environmental groups. As part of its mission to address issues of long-range comprehensive water resources; land use; economic development; open space preservation, enhancement and management, the CCWMP proposed to US EPA and Regional Board to take the lead on development of the TMDLs. 11. Regional Board staff have participated in the development of a detailed technical document that analyzes and describes the specific necessity and rationale for the development of this - TMDL. The technical document entitled "Calleguas Creek Watershed Toxicity TMDL" Resolution No.R4-2005-009 Page 3 prepared by Larry Walker Associates and is an integral part of this Regional Board action and was reviewed, considered, and accepted by the Regional Board as a supporting background report before acting. Further, the technical document provides the detailed factual basis and analysis supporting the problem statement,numeric targets(interpretation of the narrative and numeric water quality objectives used to calculate the pollutant allocations), source analysis, linkage analysis, waste load allocations (for point sources), load allocation (for nonpoint sources),margin of safety,and seasonal variations and critical conditions of this TMDL. 12. On May 5, 2005, prior to the Board's action on this resolution, public hearings were conducted on the Calleguas Creek Watershed Toxicity, Chlorpyrifos and Diazinon TMDL. Notice of the hearing for the Calleguas Creek Watershed Toxicity,Chlorpyrifos and Diazinon TMDL was published in accordance with the requirements of Water Code Section 13244. This notice was published in the Ventura County Star on April 26, the Daily News Los Angeles on April 26, and the Signal Newspaper on April 27,2005 13. The public has had reasonable opportunity to participate in the review of the amendment to the Basin Plan. A draft of the Calleguas Creek Watershed Toxicity TMDL was released for public comment on April 26, 2005; a Notice of Hearing was published and circulated 45 days preceding Board action; Regional Board staff responded to oral and written comments received from the public; and the Regional Board held a public hearing on July 7, 2005 to consider adoption of the TMDL. 14. In amending the Basin Plan, the Regional Board considered the factors set forth in Sections 13240 and 13242 of the California Water Code. 15. The amendment is consistent with the State Antidegradation Policy (State Board Resolution No. 68-16), in that it does not authorize any lowering of water quality and is designed to implement existing water quality objectives. Likewise,the amendment is consistent with the federal Antidegradation Policy(40 CFR 131.12). 16. The basin planning process has been certified as functionally equivalent to the California Environmental Quality Act requirements for preparing environmental documents (Public Resources Code, Section 21000 et seq.) and as such, the required environmental documentation and CEQA environmental checklist have been prepared. A CEQA Scoping hearing was conducted on May 31, 2005 in the City of Thousand Oaks, 2100 E. Thousand Oaks Blvd., Thousand Oaks, California. A notice of the CEQA Scoping hearing was sent to interested parties including cities and/or counties with jurisdiction in or bordering the Calleguas Creek watershed. 17. The proposed amendment could have a significant adverse effect on the environment. However, there are feasible alternatives and/or feasible mitigation measures that would substantially lessen any significant adverse impact. 18. The regulatory action meets the "Necessity" standard of the Administrative Procedures Act, Government Code, Section 11353, Subdivision(b). 19. The Basin Plan amendment incorporating a TMDL for Toxic Pollutants in Calleguas Creek watershed must be submitted for review and approval by the State Water Resources Control Board (State Board), the State Office of Administrative Law (OAL), and the USEPA. The Basin Plan amendment will become effective upon approval by USEPA. A Notice of Decision will be filed State of California Secretary of Resources. Resolution No.R4-2005-009 Page 4 THEREFORE,be it resolved that pursuant to sections 13240 and 13242 of the Water Code, the Regional Board hereby amends the Basin Plan as follows: 1. Pursuant to Sections 13240 and 13242 of the California Water Code, the Regional Board, after considering the entire record, including oral testimony at the hearing, hereby adopts the amendments to Chapter 7 of the Water Quality Control Plan for the Los Angeles Region, as set forth in Attachment A hereto, to incorporate the elements of the Calleguas Creek Watershed Toxicity TMDL. 2. The Executive Officer is directed to forward copies of the Basin Plan amendment to the State Board in accordance with the requirements of section 13245 of the California Water Code. 3. The Regional Board requests that the State Board approve the Basin Plan amendment in accordance with the requirements of sections 13245 and 13246 of the California Water Code and forward it to OAL and the USEPA. 4. If during its approval process Regional Board staff, the State Board or OAL determines that minor,non-substantive corrections to the language of the amendment are needed for clarity or consistency, the Executive Officer may make such changes, and shall inform the Board of any such changes. 5. The Executive Officer is authorized to sign a Certificate of Fee Exemption. I, Jonathan S. Bishop, Executive Officer, do hereby certify that the foregoing is a full, true, and correct copy of a resolution adopted by the California Regional Water Quality Control Board,Los Angeles Region,on July 7,2005. 7 11-fz of onathan S.Bishop Date Executive Officer `rr� Exhibit B — Toxicity Attachment A to Resolution No. R4-2005-009 Amendment to the Water Quality Control Plan Los Angeles Region to Incorporate a Total Maximum Daily Load (TMDL) for Toxicity, Chlorpyrifos, and Diazinon in Calleguas Creek, Its Tributaries, and Mugu Lagoon Exhibit B Attachment A to Resolution No.114-2005-009 Amendment to the Water Quality Control Plan—Los Angeles Region to Incorporate the Total Maximum Daily Load for Toxicity, Chlorpyrifos,and Diazinon in the Calleguas Creek,its Tributaries and Mugu Lagoon Adopted by the California Regional Water Quality Control Board, Los Angeles Region on 7 July, 2005. Amendments Table of Contents Add: Chapter 7. Total Maximum Daily Loads (TMDLs) 7- Calleguas Creek Watershed Toxicity TMDL List of Figures,Tables,and Inserts Add: Chapter 7.Total Maximum Daily Loads (TMDLs) Tables 7-16 Calleguas Creek Watershed Toxicity TMDL 7-16.1. Calleguas Creek Watershed Toxicity TMDL: Elements 7-16.2. Calleguas Creek Watershed Toxicity TMDL: Implementation Schedule Chapter 7. Total Maximum Daily Loads (TMDLs) Calleguas Creek Watershed Toxicity TMDL This TMDL was adopted by: The Regional Water Quality Control Board on July 7,2005. This TMDL was approved by: The State Water Resources Control Board on September 22, 2005. The Office of Administrative Law on December 22, 2005. The U.S. Environmental Protection Agency on March 14, 2006. July 7, 2005 Resolution No. R4-2005-009 Page 2 Table 7-16.1. Calleguas Creek Watershed Toxicity TMDL: Elements A W- -OM 4W1,41-y-11 One.14 iil"01 Problem Discharge of wastes containing chlorpyrifos,diazinon, other Statement pesticides and/or other toxicants to Calleguas Creek,its tributaries and Mugu Lagoon cause exceedances of water quality objectives for toxicity established in the Balsin Plan. Elevated levels of chlorpyrifos have been found in fish tissue samples collected from a segment of Calleguas Creek. Chlorpyrifos and diazinon are organophosphate pesticides used in both agricultural and urban settings. Excessive chlorpyrifos and diazinon can cause aquatic life toxicity in inland surface and estuarine waters such as Calleguas Creek and Mugu Lagoon. The California 2002 303(d)list of impaired waterbodies includes listings for"water column toxicity," "sediment toxicity,"chlorpyrifos in fish tissue," and "organophosphate pesticides in water" for various reaches of Calleguas Creek, its tributaries and Mugu Lagoon. Numeric Targets This TMDL establishes a numeric toxicity target of 1.0 toxicity unit —chronic (1.0 TUc)to address toxicity in reaches where the toxicant has not been identified through a Toxicity Identification Evaluation (TIE) (unknown toxicity). TUC=Toxicity Unit Chronic = I OO/NOEC (no observable effects concentration) A sediment toxicity target was defined in the technical report for reaches where the sediment toxicant has not been identified through a TIE. The target is based on the definition of a toxic sediment sample as defined by the September 2004 Water Quality Control Policy For Developing California's Clean Water Act Section 303(d) List(SWRCB). Chlorpyrifos Numeric Targets(ug/L) Chronic Acute (4 day average) (I hour average) Freshwater 0.014 0.025 Saltwater(Mugu Lagoon) 0.009 0.02 Diazinon Numeric Targets (ug/L) Chronic Acute (4 day average) (I hour average) Freshwater 0.10 0.10 Saltwater(Mugu Lagoon) 0.40 0.82 July 7,2005 Resolution No. R4-2005-009 Page 3 TMDL :cement° r Call. as Yatecshed ofnc TNIDU ` �� Additionally, the diazinon criteria selected as numeric targets are currently under review by the USEPA. If water quality objectives become available, the Regional Board may reconsider this TMDL and revise the water toxicity numeric target. Source Analysis Source analysis determined that agricultural and urban uses are the largest sources of chlorpyrifos and diazinon in the watershed. Urban use of diazinon and chlorpyrifos is unlikely to be a long-term source to the Calleguas Creek Watershed (CCW) as both of these pesticides have been banned for sale for non-agricultural uses on December 31, 2005 by federal regulation. As a result,the proportion of the loading from urban sources will likely decrease after December 2005. Chlorpyrifos—Sources by Use Dry Weather Wet Weather Agriculture 66% 80% Urban 23% 20% POTW 11% <1% Other <1% <1% Diazinon—Sources by Use Dry Weather Wet Weather Agriculture 30% 1% Urban 13% 62% POTW 57% 37% Other <1% <1% Linkage Analysis Water quality modeling established the linkage of sources of chlorpyrifos and diazinon in the CCW to observed water quality data.The linkage analysis qualitatively describes the connection between water column concentrations and sediment and fish tissue concentrations. The qualitative analysis demonstrates that the water column analysis conducted by laboratories implicitly includes sediment associated diazinon and chlorpyrifos loads transported to receiving waters as almost all water quality data do not differentiate between dissolved and particulate fractions. The linkage analysis assumes a reduction in water column concentrations will result in a reduction in fish tissue as chlorpyrifos in freshwater fish tissue rapidly depurate within several days of removal from exposure. Additionally, as chlorpyrifos preferentially binds to sediment the linkage analysis suggests that sediment concentrations of July 7, 2005 Resolution No. R4-2005-009 Page 4 ha chlorpyrifos will need to decrease to achieve water quality numeric targets. The modeling approach reflects the uncertainty in current conditions and the potential impacts of watershed planning actions that may affect those conditions. A detailed description of the model is provided in an Attachment to the TMDL Technical Report. Wasteload Maior point sources: Allocations (WLA) A wasteload of 1.0 TUB is allocated to the major point sources (POTWs) discharging to the Calleguas Creek Watershed. Additionally, the following wasteloads for chlorpyrifos and diazinon are established for POTWs. A margin of safety of 5% was included in the targets for chlorpyrifos for discharges to the Calleguas and Revolon subwatersheds. Chlorpyrifos WLAs,ug/L POTW Interim WLA Final WLA (4 day) (4 day) Hill Canyon WWTP 0.030 0.014 Simi Valley WQCP 0.030 0.014 Ventura County(Moorpark) WTP 0.030 0.014 Camarillo WRP 0.030 0.0133 Carnrosa WRP 0.030 0.0133 Diazinon WLAs,uz/L Interim Interim Final WLA Acute Chronic (Acute or Chronic) (I hour) (4 day) POTW Hill Canyon WWTP 0.567 0.312 0.10 Simi Valley WQCP 0.567 0.312 0.10 Ventura County(Morepark) WTP 0.567 0.312 0.10 Camarillo WRP 0.567 0.312 0.10 Carnrosa WRP 0.567 0.312 0.10 A wasteload of 1.0 TUB is allocated to Urban Stormwater Co- ... Permittees (MS4)discharges to the Calleguas Creek Watershed. July 7,2005 Resolution No. R4-2005-009 Page 5 `� all: as Meek ?faersied Totr. 1DI J1ZD ,Elements. �.3. .. y " Y. Additionally, the following wasteloads for chlorpyrifos and diazinon are established for MS4 discharges. Chlorpyrifos WLAs, ug/L Interim WLA Final WLA (4 day) (4 day) 0.45 0.014 Diazinon WLAs,ug/L Interim WLA Interim WLA Final WLA Acute(1 hour) Chronic(4 day) Acute and Chronic 1.73 0.556 0.10 Minor point sources: Minor sources include NPDES permittees other than POTWs and MS4s,discharging to the Calleguas Creek Watershed. A wasteload of 1.0 TUB is allocated to the minor point sources discharging to the Calleguas Creek Watershed. Additionally, the following wasteloads for chlorpyrifos and diazinon are established. Chlorpyrifos WLAs, ug/L Interim WLA Final WLA (4 day) (4 day) 0.45 0.014 Diazinon WLAs,ug/L Interim WLA Interim WLA Final WLA Acute(I hour) Chronic(4 day) Acute and Chronic 1.73 0.556 0.10 Load Allocations Non Point Source Dischargers: A load of 1.0 TUB is allocated to nonpoint sources discharging to the Calle as Creek Watershed. July 7,2005 Resolution No. R4-2005-009 Page 6 ti - � at as creekteheixic� ,T11D. �, TMD)C,.Eie>d�►en - ��- a.� Additionally, the following loads for chlorpyrifos and diazinon are established. These loads apply to dischargers in accordance with the subwatershed into which the dischargers discharge. A margin of safety of 5% was'included for chlorpyrifos for discharges to the Calleguas and Revolon subwatersheds. Chlorpyrifos Load Allocations,ug/L Interim Interim Final Subwatershed Acute(1hour) Chronic(4 day) Acute and Chronic Arroyo Simi 2.57 0.810 0.014 Las Posas 2.57 0.810 0.014 Conejo 2.57 0.810 0.014 Calleguas 2.57 0.810 0.0133 Revolon 2.57 0.810 0.0133 Mugu Lagoon 2.57 0.810 0.014 Diazinon Load Allocations,u2/L, Interim LA Interim LA Final LA Acute Chronic Acute and Chronic 0.278 0.138 0.10 Margin of Safety In addition to the implicit margin of safety achieved by conservative assumptions and by using a concentration based TMDL, an explicit margin of safety of 5% has been added to the targets for chlorpyrifos in the Calleguas and Revolon subwatersheds to address uncertainty in the linkages between the water column criteria and fish tissue and sediment concentrations. The Calleguas and Revolon subwatersheds include those reaches listed for sediment toxicity and chlorpyrifos in fish tissue. Future Growth Ventura County accounts for slightly more than 2% of the state's residents with a population of 753,197 (US Census Bureau, 2000). GIS analysis of the 2000 census data yields a population estimate of 334,000 for the CCW, which equals about 44% of the county population. According to the Southern California Association of Governments (SCAG), growth in Ventura County averaged about 51%per decade from 1900-2000; with growth exceeding 70%in the 1920s, 1950s, and 1960s. The phase-out of chlorpyrifos and diazinon is expected to reduce loads from urban and POTWs significantly by 2007. Use of diazinon in agriculture has declined considerably between 1998 and 2003. Conversely,chlorpyrifos use July 7, 2005 Resolution No. R4-2005-009 Page 7 Watershed T&A in agriculture has remained relatively stable over the same period. The phase out of chlorpyrifos and diazinon as well as population growth will cause an increase in the use of replacement pesticides (e.g. pyrethroids)in the urban environment and may have an impact on water and/or sediment toxicity. Additionally,population growth may affect an increase in the levels of chlorpyrifos and diazinon loading in the CCW from imported products which contain residues of these pesticides. Critical The critical condition in this TMDL is defined as the flowrate at Conditions which the model calculated the greatest in-stream diazinon or chlorpyrifos concentration in comparison to the appropriate criterion. The critical condition for chlorpyrifos was in dry weather based on a chronic numeric target; the critical condition for diazinon was in wet weather based on an acute numeric target except in Mugu Lagoon where it was in dry weather based on the chronic numeric target. Implementation WLAs established for the major points sources, including POTWs Plan in the CCW will be implemented through NPDES permit effluent limits. The final WLAs will be included in NPDES permits in accordance with the compliance schedules provided. The Regional Board may revise these WLAs based on additional information as described in the Special Studies and Monitoring Section of the Technical Report. The toxicity WLAs will be implemented in accordance with US EPA, State Board and Regional Board resolutions, guidance and policy at the time of pen-nit issuance or renewal. Currently, these WLAs would be implemented as a trigger for initiation of the TRE/TEE process as outlined in USEPA's 'Understanding and Accounting for Method Variability in Whole Effluent Toxicity Applications Under the National Pollutant Discharge Elimination System Program"(2000) and current NPDES permits held by dischargers to the CCW. Stormwater WLAs will be incorporated into the NPDES permit as receiving water limits measured in-stream at the base of each subwatershed and will be achieved through the implementation of BMPs as outlined below. Evaluation of progress of the TMDL will be determined through the measurement of in-stream water quality and sediment at the base of each of the CCW subwatersheds. The Regional Board may revise these WLAs based on additional information developed through special studies and/or monitoring conducted as part of the TMDL. July 7, 2005 Resolution No. R4-2005-009 Page 8 TMDL Elmenfi a '�` as Leek''fatershe Ta�ci ` . ' As shown in the attached table the following implementation actions will be taken by the MS4s discharging to the CCW and POTWs located in'the CCW: 4 Plan, develop, and implement an urban pesticides public education program; + Plan, develop, and implement urban pesticide education and chlorpyrifos and diazinon collection program; 4. Study diazinon and chlorpyrifos replacement pesticides for use in the urban environment; and, 4 Conduct environmental monitoring as outlined in the Monitoring Plan and NPDES Permits. LAs for chlorpyrifos and diazinon will be implemented through the State's Nonpoint Source Pollution Control Program(NPSPCP), nonpoint source pollution (i.e. Load Allocations). The LARWQCB is currently developing a Conditional Waiver for Irrigated Lands. Once adopted, the Conditional Waiver Program will implement' allocations and attain numeric targets of this TMDL. Compliance with LAs will be measured at the monitoring sites approved by the Executive Officer of the Regional Board through the monitoring program developed as part of the Conditional Waiver, or through a monitoring program that is required by this TMDL. The toxicity LAs will be implemented in accordance with US EPA, State Board and Regional Board resolutions, guidance and policy at the time of permit or waiver issuance or renewal. The following implementation actions will be taken by agriculture dischargers located in the CCW: + Enroll for coverage under a waiver of waste discharge requirements for irrigated lands; + Implement monitoring required by this TMDL and the Conditional Waiver program; Complete studies to determine the most appropriate BMPs given crop type,pesticide, site specific conditions, as well as the critical condition defined in the development of the LAs; and, 46 Implement appropriate BMPs and monitor to evaluate effectiveness on in-stream water and sediment quality. The Regional Board may revise this TMDL based on monitoring data and special studies of this TMDL. If the Regional Board revises NPDES permits or the Basin Plan to use other methods of L� L July 7,2005 Resolution No. R4-2005-009 Page 9 `�.• T1VME�Elemen '. .' r reeateirshed To��:. . MDI:� 3_ .;`_kti evaluating toxicity or if other information supporting other methods becomes available, the Regional Board may reconsider this TMDL and revise the water toxicity numeric target. Additionally,the development of sediment quality guidelines or criteria and other water quality criteria revisions may call for the reevaluation of the TMDL. The Implementation Plan includes this provision for reevaluating the TMDL to consider sediment quality guidelines or criteria and revised water quality objectives and the results of implementation studies, if appropriate. July 7, 2005 Resolution No. R4-2005-009 Page 10 Table 7-16.2. Overall Implementation Schedule for Calleguas Creek Watershed Toidcity TMDL 0 '"MO. ;X"0_1-11 Interim chlorpyrifos and diazinon waste-load allocations POTW permittees 2 1 apply. and MS4 Effective date Co rmittees 2 Interim chlorpyrifos and diazinon load allocations apply. Agricultural Effective date 2 Dischargers Finalize and submit workplan for integrated Calleguas POTW permittees,MS4 Copermittees, 6 months after effective date 3 Creek Watershed Monitoring Program for approval by 2 the Regional Board Executive Officer.3 and Agricultural of amendment Dischargers POTW permittees, 6 months after E.O. 4 Initiate Calleguas Creek Watershed Toxicity TMDL MS4 Copermittees, approval of Monitoring Monitoring Program developed under Task 3 workplan. and Agricultural Program(task 3)workplan. Dischargers Special Study#1 - Investigate the pesticides that will POTW permittees 5 replace diazinon and chlorpyrifos in the urban and MS4 2 years after effective date 2 environment,their potential impact on receiving waters, Copermittees and potential control measures. Special Study#2—Consider results of monitoring of 6 months after completion sediment concentrations by source/land use type through Agricultural of CCW OC Pesticides, 6 special study required in the OC Pesticide,PCB and Dischargers 3 and PCBs and Siltation TMDL siltation TMDL Implementation Plan. If the special study MS4 Copermittees sediment concentrations is not completed through the OC Pesticides,PCBs and 2 Siltation TMDL no consideration is necessary 3 special study. Develop and implement collection program for diazinon POTW permittees 7 and chlorpyrifos and an educational program. Collection and MS4 3 years after effective date 2 and education could occur through existing programs Copermittees such as household hazardous waste collection events Develop an Agricultural Water Quality Management Plan in conjunction with the Conditional Waiver for Irrigated Agricultural 2 8 Lands,or(if the Conditional Waiver is not adopted in a Dischargers 3 3 years after effective date timely manner)develop an Agricultural Water Quality Management Plan as part of the Calleguas Creek WMP. Identify the most appropriate BMPs given crop type, Agicultural 2 9 pesticide,site specific conditions,as well as the critical Discharge rS3 3 years after effective date condition defined in the development of the LAs. Implement educational program on BMPs identified in Agricultural I year after E.O. approval of 10 the Agricultural Water Quality Management Plan. Dischargers Plan(Task 7)2 Special Study#3 Calculation of sediment transport rates Agricultural 6 months after completion 11 in CCW. Consider findings of transport rates developed Dischargers 3 and of CCW OC Pesticides, through the OC Pesticide,PCB and siltation TMDL MS4 Co permittees PCBa and Siltation TMDL 1 Interim WLAs and LAs are effective immediately upon TMDL adoption. WLAs will be placed in POTW NPDES permits as effluent limits. WLAs will be placed in stormwater NPDES permits as in-stream limits. LAs will be implemented using applicable regulatory mechanisms. 2 Effective date of this TMDL. 3 The Regional Board regulatory programs addressing all discharges in effect at the time an implementation task is due may contain requirements substantially similar to the requirements of an implementation task. If such a requirement is in place in another regulatory program including other TMDLs,the Executive Officer may determine that such other requirements satisfy the requirements of an implementation task of the TMDL and thereby coordinate this TMDL implementation plan with other regulatory programs. 111N., July 7, 2005 Resolution No. R4-2005-009 Page 11 zLn fnten �.w. r•2�i�� �''ii`'°ts a��, .•r, y. 7f 3 �.5. a hK s'� r., Implementation Plan. If the special study is not sediment transport special completed through the OCsTMDL,no consideration is study.2 necessary.3 Agricultural 1 year after E.O. approval of 12 Begin implementation of BMPs. Dischargers 3 Plan(Task 8)2 Agricultural 3 years after E.O.approval 13 Evaluate effectiveness of BMPs. Dischargers 3 of Plan ask 8 2 Based on monitoring data and on the results of Stakeholders and Implementation Actions 1-13 and if sediment guidelines. Regional Board are promulgated,or water quality criteria are revised, 2 years after the submittal of 14 and/or if targets are achieved without attainment of information necessary to WLAs or LAs reevaluate the TMDLs,interim or final reevaluate the TMDL WLAs and LAs and implementation schedule,if necessary. POTW permittees 2 years after the effective 15 Achievement of Final WLAs and MS4 date of the TMDLZ Co ermittees 16 Achievement of Final LAs Agricultural 10 years after the effective Dischargers date of the TMDL2 July 7, 2005 Exhibit C — Organochlorine State of California California Regional Water Quality Control Board Los Angeles Region Resolution No. R4-2005-010 July 7, 2005 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a Total Maximum Daily Load for Organochlorine Pesticides, Polychorinated Biphenyls, and Siltation in Calleguas Creek, its Tributaries, and Mugu Lagoon Exhibit C State of California California Regional Water Quality Control Board,Los Angeles Region RESOLUTION NO. R4-2005-010 July 7,,2005 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a Total Maximum Daily Load for Organochlorine Pesticides, . Polychorinated Biphenyls,and Siltation in Calleguas Creek,its Tributaries,and Mugu Lagoon WHEREAS, the California Regional Water Quality Control Board, Los Angeles Region, finds that: 1. The Federal Clean Water Act(CWA)requires the Califomii Regional Water Quality Control Board, Los Angles Region (Regional Board)to develop water quality objectives, which are sufficient to protect beneficial uses for each water body found within its region. 2. A consent decree between the U.S. Environmental Protection Agency (USEPA), Heal the Bay, Inc. and BayKeeper,Inc. was approved on March 22, 1999. This court order directs the USEPA to complete Total Maximum Daily Loads(TMDLs)for all impaired waters within 13 years. A schedule was established in the consent decree for the completion of the first 29 TMDLs within 7 years, including completion of a TMDL to reduce Organochlorine (OC) pesticides and Polychlorinated Biphenyls (PCBs) at Calleguas Creek Watershed by March 22, 2006. The remaining TMDLs will be scheduled by Regional Board staff within the 13- year period. 3. The elements of a TMDL are described in 40 CFR 130.2 and 130.7 and section 303(d)of the CWA, as well as in USEPA guidance documents(Report No. EPA/440/4-91/001)_ A TMDL is defined as the sum of the individual waste load allocations for point sources, load allocations for nonpoint sources and natural background(40 CFR 130.2). Regulations further stipulate that TMDLs must be set at levels necessary to attain and maintain the applicable narrative and numeric water quality standards with seasonal variations and a margin of safety that takes into account any lack of knowledge concerning the relationship between effluent limitations and water quality (40 CFR 130.7(c)(1)). The regulations in 40 CFR 130.7 also state that TMDLs shall take into account critical conditions for stream flow, loading and water quality parameters. 4. The numeric targets in this TMDL are not water quality objectives and do not create new bases for enforcement against dischargers apart from the water quality objectives they translate. The targets merely establish the bases through which load allocations (LAs) and waste load allocations (WLAs) are calculated. WLAs are only enforced for a discharger's own discharges, and then only in the context of its National Pollutant Discharge Elimination System(NPDES)permit, which must be consistent with the assumptions and requirements of the WLA. The Regional Board will develop permit requirements through a subsequent permit action that will allow all interested persons, including but not limited to municipal storm water dischargers,to provide comments on how the WLA will be translated into permit requirements. �1rr► J Resolution No.R4-2005-010 Page 2 5. Upon establishment of TMDLs by the State or USEPA, the State is required to incorporate �.. the TMDLs along with appropriate implementation measures into the State Water Quality Management Plan(40 CFR I30.6(c)(1), 130.7). This Water Quality Control Plan for the Los Angeles Region (Basin Plan), and applicable statewide plans, serves as the State Water Quality Management Plans governing the watersheds under the jurisdiction of the Regional 'Board. 6. The SWRCB adopted Policy for Implementation of Toxics Standards for Inland Surface Waters,Enclosed Bays, and Estuaries of California (also known as the State Implementation flan or SIP) on March 2, 2000. The SIP was amended by Resolution No. 2000-30, on April 26,2000,and the Office of Administrative Law approved the SIP on April 28, 2000. The SIP applies to discharges of toxic pollutants in the inland surface waters, enclosed bays and estuaries of California which are subject to regulation under the State's Porter-Cologne Water Quality Control Act (Division 7 of the Water Code) and the Federal Clean Water Act. This policy also establishes the following: implementation provisions for priority pollutant criteria promulgated by USEPA through the CTR and for priority pollutant objectives established by Regional Water Quality Control Boards in their water quality control plans (Basin Plans) and chronic toxicity control provisions. 7. On May 18, 2000, the U.S. EPA promulgated the numeric criteria for priority pollutants for the State of California, known as the California Toxics Rule (CTR) and as codified as 40 CFR section 131.38. 8. The Calleguas Creek Watershed is located in southeast Ventura County, California, and in a small portion of western Los Angeles County, and drains an area of approximately 343 square miles from the Santa Susana Pass in the east, to Mugu Lagoon in the southwest. ` Current land use is approximately 26 percent agriculture, 24 percent urban, and 50 percent open space. The tributaries and the streams of the Calleguas Creek Watershed are divided into fourteen segments, or reaches. The 2002 Clean Water Act 303(d) list identified eleven reaches out of thirteen reaches of the Calleguas Creek watershed as impaired for OC pesticides and PCBs. These listings were approved by the State Water Resources Control Board on February 4, 2003. 9. The Regional Board's goal in establishing the Calleguas Creek OC Pesticides, PCBs and Siltation TMDL is to determine and set forth measures needed to prevent impairment of water quality due to OC pesticides and PCBs in Calleguas Creek. 10. Calleguas Creek stakeholders have been actively engaged with US EPA and the Regional Board on a variety of watershed planning initiatives in the Calleguas Creek Watershed. Key stakeholders have formed the Calleguas Creek Watershed Management Plan (CCWMP), an established,stakeholder-led watershed management group that has been continually operating since 1996. The Calleguas Creek Watershed Management Plan has broad participation from Federal, State and County agencies, municipalities, POTWs, water purveyors, groundwater management agencies, and agricultural and environmental groups. As part of its mission to address issues of long-range comprehensive water resources; land use; economic development; open space preservation, enhancement and management, the CCWMP proposed to US EPA and Regional Board to take the lead on development of the TMDLs. 11. Regional Board staff have worked with the CCWMP and US EPA in the development of a detailed technical document that analyzes and describes the specific necessity and rationale for the development of this TMDL. The technical document entitled "Calleguas Creek Resolution No.R4-2005-010 Page 3 Watershed OC Pesticides and PCBs TMDL" prepared by Larry Walker Associates is an integral part of this Regional Board action and was reviewed, and accepted by the Regional Board as a supporting technical analysis before acting. Regional Board staff led the development of the TMDL analysis for siltation with participation from CCWMP and Stakeholders. The technical document provides the detailed factual basis and analysis supporting the problem statement, numeric targets (interpretation of the narrative and numeric water quality objectives, used to calculate the pollutant allocations), source analysis, linkage analysis, waste load allocations (for point sources), load allocation (for nonpoint sources),margin of safety, and seasonal variations and critical conditions of this TMDL. 12. Regional Board staff used all available information in its analysis of the siltation listing for Mugu Lagoon. Based on available information, Regional Board staff find that excessive siltation into estuaries can impair aquatic life habitat through excess deposition. Furthermore, historic pesticides and PCBs adhere to sediment particles and are transported with sediment to Calleguas Creek and Mugu Lagoon. Staff find sufficient existing data to establish the annual excess sediment and silt loading to Mugu Lagoon, but insufficient existing data to establish the annual loading of sediment and silt to Mugu Lagoon under the highly variable meteorological and hydrological conditions within the Calleguas Creek watershed. Consequently, this TMDL establishes interim wasteload and interim load allocations as a sediment mass reduction, and provides for special studies to develop a refined TMDL as discussed below in order to protect aquatic life and wetland habitat beneficial uses. The interim wasteload and load reductions represent staff's best professional judgement of the sediment mass reductions needed to achieve compliance with the TMDL targets based on achieving the regional narrative water quality objectives for wetlands hydrology and habitat, and solid, suspended, or settleable materials that can cause siltation that degrades aquatic life habitat. 13. During the implementation period, stakeholders will conduct a special study to assess the amount of sediment, silt and pollutants that are conveyed to and deposited within the Mugu Lagoon over time. After the special study has been completed and reviewed by a Science Advisory Panel in accordance with the TMDL Implementation Plan,the Regional Board will re-consider the TMDL and the final wasteload and load allocations. The revised final TMDL and allocations may be expressed in terms of total mass loading of sediment, silt and/or pollutants to Mugu Lagoon. 14. On May 5, 2005, prior to the Board's action on this resolution, public hearings were conducted on the Calleguas Creek Watershed OC Pesticides, PCBs and Siltation TMDL. Notice of the hearing for the Calleguas Creek Watershed OC Pesticides and PCBs TMDL was published in accordance with the requirements of Water Code Section 13244. This notice was published in the Ventura County Star on April 26,the Daily News Los Angeles on April 26,and the Signal Newspaper on April 27,2005. 15. The public has had reasonable opportunity to participate in the review of the amendment to the Basin Plan. A draft of the Calleguas Creek Watershed OC Pesticides and PCBs TMDL was released for public comment on April 26,2005; a Notice of Hearing and Notice of Filing were published and circulated 45 days preceding Board action; Regional Board staff responded to oral and written comments received from the public; and the Regional Board held a public hearing on July 7,2005 to consider adoption of the TMDL. 16. In amending the Basin Plan, the Regional Board considered the factors set forth in Sections ., 13240 and 13242 of the California Water Code. Resolution No. R4-2005-010 Page 4 17. The amendment is consistent with the State Antidegradation Policy (State Board Resolution No. 68-16), in that it does not authorize any lowering of water quality and is designed to implement existing water quality objectives. Likewise,the amendment is consistent with the federal Antidegradation Policy(40 CFR 131.12). 18. The basin planning process has been certified as functionally equivalent to the California Environmental Quality Act requirements for preparing environmental documents (Public Resources Code, Section 21000 et seq.) and as such, the required environmental documentation and CEQA environmental checklist have been prepared. 'A CEQA Scoping hearing was conducted on May 31, 2005 in the City of Thousand Oaks, 2100 E. Thousand Oaks Blvd., Thousand Oaks, California. A notice of the CEQA Scoping hearing was sent to interested parties including cities and/or counties with jurisdiction in or bordering the Calleguas Creek watershed. 19. The proposed amendment could have a significant adverse effect on the environment. However, there are feasible alternatives and/or feasible mitigation measures that would substantially lessen any significant adverse impact. 20. The regulatory action meets the "Necessity" standard of the Administrative Procedures Act, Government Code, Section 11353, Subdivision(b). 21. The Basin Plan amendment incorporating a TMDL for OC Pesticides and PCBs in Calleguas Creek watershed must be submitted for review and approval by the State Water Resources Control Board(State Board),the State Office of Administrative Law(OAL),and the USEPA. The Basin Plan amendment will become effective upon approval by USEPA. A Notice of Decision will be filed with the State of California Secretary of Resources. THEREFORE, be it resolved that pursuant to sections 13240 and 13242 of the Water Code, the Regional Board hereby amends the Basin Plan as follows: 1. Pursuant to Sections 13240 and 13242 of the California Water Code, the Regional Board, after considering the entire record, including oral testimony at the hearing, hereby adopts the amendments to Chapter 7 of the Water Quality Control Plan for the Los Angeles Region, as set forth in Attachment A hereto, to incorporate the elements of the Calleguas Creek Watershed OC Pesticides and PCBs TMDL. 2. The Executive Officer is directed to forward copies of the Basin Plan amendment to the State Board in accordance with the requirements of section 13245 of the California Water Code. 3. The Regional Board requests that the State Board approve the Basin Plan amendment in accordance with the requirements of sections 13245 and 13246 of the California Water Code and forward it to OAL and the USEPA. 4. If during its approval process Regional Board staff, the State Board or OAL determines that minor,non-substantive corrections to the language of the amendment are needed for clarity or consistency, the Executive.Officer may make such changes, and shall inform the Board of any such changes. Resolution No.R4-2005-010 Page 5 5. The Executive Officer is authorized to sign a Certificate of Fee Exemption. I, Jonathan S. Bishop, Executive Officer, do hereby certify that the foregoing is a full, true, and correct copy of a resolution adopted by the California Regional Water Quality Control Board,Los Angeles Region,on July 7,2005. / - - �i f/Qt onathan S.Bisho Date Executive Officer Exhibit C — Organochlorine Pesticides Basin Plan Amendment Attachment A to Resolution No. R4-2005-010 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a Total Maximum Daily Loads (TMDLs) for Organochlorine (OC) Pesticides, Polychorinated Biphenyls (PCBs) , and Siltation in Calleguas Creek, its Tributaries, and Mugu Lagoon Exhibit C Attachment A to Resolution No. 114-2005-010 Amendment to the Water Quality Control Plan—Los Angeles Region to Incorporate a Total Maximum Daily Loads(TMDLs)for Organochlorine (OC) Pesticides, Polychlorinated Biphenyls (PCBs) and Siltation in Calleguas Creek,Its Tributaries,and Mugu Lagoon Adopted by the California Regional Water Quality Control Board, Los Angeles Region on July 7, 2005. Amendments Table of Contents Add: Chapter 7.Total Maximum Daily Loads (TMDLs) 7- 17 Calleguas Creek Organochlorine Pesticides, Polychlorinated Biphenyls, and Siltation TMDL List of Figures,Tables,and Inserts Add: Chapter 7.Total Maximum Daily Loads (TMDLs) Tables - 7-17 Calleguas Creek Organochlorine Pesticides,Polychlorinated Biphenyls, and Siltation TMDL 7-17.1 Calleguas Creek Organochlorine Pesticides,Polychlorinated Biphenyls, and Siltation TMDL: Elements 7-17.2 Calleguas Creek Organochlorine Pesticides, Polychlorinated Biphenyls, and Siltation TMDL: Implementation Schedule Chapter 7. Total Maximum Daily Loads(TMDLs) Calleguas Creek Organochlorine Pesticides,Polychlorinated Biphenyls, and Siltation TMDL Add: This TMDL was adopted by the Regional Water Quality Control Board on July 7,2005. This TMDL was approved by: The State Water Resources Control Board on September 22, 2005. The Office of Administrative Law on January 20, 2006. The U.S. Environmental Protection Agency on March 14, 2006. The following table includes the elements of the TMDL: July 7, 2005 Attachment A to Resolution No. R4-2005-010 Table 7-17.1. Calleguas Creek Watershed OC Pesticides,PCBs,and Siltation TMDL: Elements MIN a-"M . ..... Problem Eleven of fourteen reaches in the Calleguas Creek Watershed Statement (CCW)were identified on the 2002 303(d) list of water-quality limited segments as impaired due to elevated levels of organochlorine (OC)pesticides and/or polychlorinated biphenyls (PCBs)in water, sediment, and/or fish tissue. Additionally, Mugu Lagoon was listed as impaired for sedimentation/siltation. OC pesticides and PCBs can bioaccumulate in fish tissue and cause toxicity to aquatic life in estuarine and inland waters. Siltation may transport OC Pesticides and PCBs to surface waters and impair aquatic life and wildlife habitats. Numeric The following tables provide the targets for water, fish tissue, and Targets sediment for this TMDL. Water column targets were derived from the California Toxic Rule(CTR) water quality criteria for protection of aquatic life. Chronic criteria(Criteria Continuous Concentration, or CCC)were applied unless otherwise noted in the table below: Water Quality Targets(ng/L)t Constituent Freshwater MarineZ Aldrin 300.0 130.0 Chlordane 4.3 4.0 Dacthal 3,500,000.0 (a)3 4,4'-DDD4 (a)3 (a)3 4,4'-DDES (a)3 (a)3 4,4'-DDT6 1.0 1.0 Dieldrin 56.0 1.9 Endosulfan I 56.0 8.7 Endosulfan II 56.0 8.7 Endrin 36.0 2.3 HCH(alpha-BHC') (a)3 (a)3 HCH(beta-BHC) (a)3 (a)3 HCH(delta-BHC) a)3 (a)3 ng/L:nanogram per Etter '-Marine numeric targets applied to Mugu Lagoon 3 Numeric targets have not been established for these constituents 4 DDD:Dichlorodiphenyldichloroethane 3 DDE:Dichlorodiphenyldich loroethylene 6 DDT:Dichlorodiphenyltrichloroethane BHC:Hexachlorocyclohexane Page 2 July 7,2005 Attachment A to Resolution No.R4-2005-010 femen a - ek 5 i<+ed Uvi des fi h6>tt HCH(gamma BHC) 950.0 160.0 Heptachlor 3.8 3.6 Heptachlor Epoxide 3.8 3.6 PCBs 140.0' 30.07 Toxaphene 0.2 0.2 Fish tissue targets are derived from CTR human health criteria for consumption of organisms. Fish Tissue Targets(ng/Kg) Constituent Aldrin 50.0 Chlordane 830.0 Dacthal (a)Z 4,4'-DDD 45,000.0 4,4'-DDE 32,000.0 4,4'-DDT 32,000.0 Dieldrin 650.0 Endosulfan I 65,000,000.0 Endosulfan H 65,000,000.0 Endrin 3,200,000.0 HCH(alpha-BHC) 1,700.00 HCH(beta-BHC) 6,000.0 HCH(delta-BHC) (a)' HCH(gamma BHC) 8,200. Heptachlor 2,400.0 Heptachlor Epoxide 1,200.0 PCBs 5,300.03 Toxaphene 9,800.0 Sediment targets were derived from sediment quality guidelines contained in National Oceanographic and Atmospheric Administration (NOAA)Screening Quick Reference Tables (SQuiRT, Buchman, 1999). Sediment Quality Targets(ng/dry Kg) Constituent Freshwater,TEL° Marines,ER L6 Aldrin (a)' (a)' Chlordane 4,500.0 500.0 Dacthal (a)' (a)' 4,4'-DDD 3,500.0 2,000.0 'Applies to sum of all congener or isomer or homolog or Aroclor analyses 2 Numeric targets have not been established for these constituents 3 Applies to sum of all congener or isomer or homolog or Aroclor analyses TEL=Threshold Effects Level 'Marine numeric targets applied to Mugu Lagoon b ERL=Effects Range-Low. t Page 3 July 7,2005 Attachment A to Resolution No. R4-2005-010 `... ��Ele e�'A �a11' ;!✓�rry x a`}" h�UC�P� cxdJ' �PGB'`��aln�� tat3oF �: 4,4'DDE 1,400.0 2,200.0 4,4'-DDT (a)' 1,000.0 Dieldrin 2,900.0 20.0 Endosulfan I (a)' (a)' Endosulfan H (a)' (a)' Endrin 2,700.0 (a)' HCH(alpha-BHC) (a)' (a)' HCH(beta-BHC) (a)' (a)' HCH(delta-BHC) (a)' (a)' HCH(gamma BHC) 940.0 (a)' Heptachlor (a)' (a)' Heptachlor Epoxide 600.0 (a)' PCBs 34,000.0' 23,000.0 Toxaphene (a)' (a)' Siltation Targets This TMDL includes two numeric targets for siltation reduction and maintenance of existing habitat in Mugu Lagoon which are listed below: • Siltation reduction Annual average reduction in the import of silt of 5,200 tons/year, which will be measured at the US Naval Base total suspended sediment gauge at the entrance to Mugu Lagoon. • Maintenance of existing habitat in Mugu Lagoon Preservation of the existing 1400 acres of aquatic habitat in Mugu Lagoon. Source Analysis Monitoring data from major NPDES discharges and land use runoff were analyzed to estimate the magnitude of OC pesticides and PCBs loads to Calleguas Creek, its tributaries and Mugu Lagoon. The largest source of OC pesticides in the listed waters is agricultural runoff. Most PCB residues are due to past use of PCBs as coolants and lubricants in transformers, capacitors, and other electrical equipment. Atmospheric deposition is also a potential source of PCBs. Urban runoff and POTWs are minor sources of OC pesticides and PCBs. Data analysis suggests that groundwater, atmospheric deposition, and imported water are not significant sources of OC pesticides, PCBs, or sediment. Further evaluation of these sources is set forth in the Implementation Plan. Linkage The linkage analysis is based on a conceptual model for the fate, Analysis transformation, and uptake of OC pesticides and PCBs and a mass- balance model that connects the sources of OC pesticides and PCBs to their fate and transport in Calleguas Creek, its tributaries, and .� Mugu Lagoon. The linkage analysis indicates: 1)OC pesticides Page 4 July 7,2005 Attachment A to Resolution No.R4-2005-010 ,� TNIDItit`emal ' "_C>rek ateishec Q Pestrcid s� ' ` S' ta>ia�n ! T Yr 4 and PCBs concentrations in tissue are proportional to OC pesticides and PCBs concentrations in sediments;2) OC pesticides and PCBs concentrations in water are a function of OC pesticides and PCBs concentrations in sediment; and 3) OC pesticides and PCBs concentrations in sediment are a function of OC pesticides and PCBs loading and sediment transport. Because sediments store, convey and serve as a source of OC pesticides and PCBs, a reduction of OC pesticides and PCBs concentrations in sediment will result in a reduction of OC pesticides and PCBs concentration in the water column and fish tissue. In this linkage analysis,DDE is used as a representative constituent,because DDE is consistently detected in monitoring and exceeds numeric targets in water, sediment, and tissue samples. Also, other OC Pesticides and PCBs possess similar physical and chemical properties to DDE. Wasteload Allocations 1. Interim and Final WLAs*for Pollutants in Effluent for POTWs. The interim wasteload allocations for POTWs will be re- considered by the Regional Board on a 5-year basis. This re- consideration will be based on sufficient data to calculate Interim Wasteload Allocations in accordance with SIP procedures. a) Interim WLAs (ng/L) Constituent POTW Hill Canyon Simi Valley Moorpark Camarillo Camrosa Daily Daily Daily Daily Daily Chlordane 1.2 100.0 100.0 100.0 100.0 4,4-DDD 20.0 50.0 50.0 6.0 50.0 4,4-DDE 260.0 1.2 1.2 188.0 50.0 4,4-DDT 10.0 10.0 10.0 10.0 10.0 Dieldrin 10.0 10.0 10.0 10.0 10.0 PCBs 500.0 500.0 500.0 31.0 500.0 Tozaphene 500.0 500.0 500.0 500.0 500.0 *WLAs shall be applied to POTWsleffluent b) Final WLAs (ng/L) Constituent POTW Hill Canyon Simi Valley Moorpark Camarillo Camrosa Daily Monthly Daily Monthly Daily Monthly Daily Monthly Daily Monthly Chlordane 1.2 0.59 1.2 0.59 1.2 0.59 1.2 0.59 1.2 0.59 4,4-DDD 1.7 0.84 1.7 0.84 1.7 0.84 1.7 0.84 1.7 0.84 4,4-DDE 1.2 0.59 1.2 0.59 1.2 0.59 1.2 0.59 1.2 0.59 4,4-DDT 1.2 0.59 1.2 0.59 1.2 0.59 1.2 0.59 1.2 0.59 Dieldrin 0.28 0.14 0.28 0.14 0.28 0.14 0.28 0.14 0.28 0.14 Page 5 July 7, 2005 Attachment A to Resolution No. R4-2005-010 � ement,�� leguas 1UW�tersb r .fir« PCBs 0.34 0.17 0.34 0.17 0.34 0.17 0.34 0.17 0.34 0.17 Toxaphene 0.33 0.16 0.33 0.16 0.33 0.16 0.33 0.16 0.33 0.16 The final WLAs will be included in NPDES permits in accordance with schedule in the implementation plan. The Regional Board may revise final WLAs prior to the dates they are placed into permits and/or prior to the dates of final WLA achievement based on special studies and monitoring of this TMDL. 2. Interim and Final WLAs for Pollutants in Sediment for Stormwater Permittees a) Interim WLAs(ng/g) Constituent Subwatershed Mugu Calleguas Revolon Arroyo Arroyo Conejo Lagoon' Creek Slough Las Posas Simi Creek Chlordane 25.0 17.0 48.0 3.3 3.3 3.4 4,4-DDD 69.0 66.0 400.0 290.0 14.0 5.3 4,4-DDE 300.0 470.0 1,600.0 950.0 170.0 20.0 4,4-DDT 39.0 110.0 690.0 670.0 25.0 2.0 Dieldrin 19.0 3.0 5.7 1.1 1.1 3.0 PCBs 180.0 3,800.0 7,600.0 25,700.0 25,700.0 3,800.0 Toxaphene 22,900.0 260.0 790.0 230.0 230.0 260.0 Compliance with sediment based WLAs is measured as an in- stream annual average at the base of each subwatershed where the discharges are located. b) Final WLAs (ng/g) Constituent Subwatershed Mugu Calleguas Revolon Arroyo Arroyo Conejo Lagoon' Creek Slough Las Posas Simi Creek Chlordane 3.3 3.3 0.9 3.3 3.3 3.3 4,4-DDD 2.0 2.0 2.0 2.0 2.0 2.0 4,4-DDE 2.2 1.4 1.4 1.4 1.4 1.4 4,4-DDT 0.3 0.3 0.3 0.3 0.3 0.3 Dieldrin 4.3 0.2 0.1 0.2 0.2 0.2 PCBs 180.0 120.0 130.0 120.0 120.0 120.0 Toxaphene 360.0 0.6 1.0 0.6 0.6 0.6 1 The Mugu Lagoon subwatershed includes Duck Pond/Agricultural Drain/Mugu/Oxnard Drain#2. Compliance with sediment based WLAs is measured as an in- stream annual average at the base of each subwatershed where the discharges are located. 3. Final WLAs for Pollutants in Water Column for Minor Point Sources -^ WLAs for pollutants in water column are allocated below to Page 6 July 7, 2005 Attachment A to Resolution No. R4-2005-010 U w: w t Men it )KY NOW minor point sources enrolled under NPDES permits or VTDRs, which discharge to Calleguas Creek. Constituent Daily Maximum(ng/L) Monthly Average(ng/L) Chlordane 1.2 0.59 4,4-DDD 1.7 0.84 4,4-DDE 1.2 0.59 4,4-DDT 1.2 0.59 Dieldrin 0.28 0.14 PCBs 0.34 0.17 Toxaphene 0.33 0.16 4. Siltation WLA for MS4 MS4 dischargers will receive an allocation of 2,496-tons/yr. reduction in sediment yield to Mugu Lagoon. The baseline from which the load reduction will be evaluated will be determined by a special study of this TMDL. The load allocation will apply after the baseline is established, as described in the Implementation Plan. Load Compliance with sediment based LAs listed below is measured as Allocations an in-stream annual average at the base of each subwatershed. 1. Interim and Final Load Allocations a) Interim Sediment LAs (ng/g) Constituent Subwatershed Mugu Calleguas Revolon Arroyo Arroyo Conejo Lagoon' Creek Slough Las Posas Simi Creek Chlordane 25.0 ITO 48.0 3.3 3.3 3.4 4,4-DDD 69.0 66.0 400.0 290.0 14.0 5.3 4,4-DDE 300.0 470.0 1,600.0 950.0 170.0 20.0 4,4-DDT 39.0 110.0 690.0 670.0 25.0 2.0 Dieldrin 19.0 3.0 5.7 1.1 1.1 3.0 PCBs 180.0 3,800.0 7,600.0 25,700.0 25,700.0 3,800.0 Toxaphene 22900.0 260.0 790.0 230.0 230.0 260.0 1 The Mugu Lagoon subwatershed includes Duck Pond/Agricultural Drain/Mugu/Oxnard Drain#2. b) Final Sediment LAs (ng/g) Constituent Subwatershed Mugu Calleguas Revolon Arroyo Arroyo Conejo Lagoon Creek Slough Las Posas Simi Creek Page 7 July 7,2005 Attachment A to Resolution No.R4-2005-010 estfd 2 h X. 6 -e -n e; �,--Wil 1..,,. . ..,, .. -1-06 -xm- 1- Chlordane 3.3 3.3 0.9 3.3 3.3 3.3 4,4-DDD 2.0 2.0 2.0 2.0 2.0 2.0 4,4-DDE 2.2 1.4 1.4 1.4 1.4 1.4 4,4-DDT 0.3 0.3 0.3 0.3 0.3 U Dieldrin 4.3 0.2 0.1 0.2 0.2 0.2 PCBs 180.0 120.0 130.0 120.0 120.0 120.0 Toxaphene 360.0 0.6 1.0 0.6 0.6 0.6 1 The Mugu Lagoon subwatershed includes Duck Pond/Agricultural Drairu`Mup/Oxnard Drain#2. 2.Siltation LAs Agricultural dischargers will receive an allocation of 2,704 tons/yr. Reduction in sediment yield to Mugu Lagoon. The baseline from which the load reduction will be evaluated will be determined by a special study of this TMDL. The load allocation will apply after the baseline is established, as described in the Implementation Plan. Margin of This TMDL relies on an implicit margin of safety, by incorporating Safety conservative assumptions throughout its development, including: • Basing percent reductions on the historical data set of water and fish tissue concentrations, which does not reflect the effects of attenuation the over the past ten years. • Determining the percent reduction in sediment,by basing it on the greater percent reduction of either water or fish tissue concentrations based on available data. • Reducing the allowable concentration for upstream subwatersheds,to ensure protection of those subwatersheds downstream from upstream inputs. • Choosing Threshold Effects Levels (TELs) and Effects Range Lows (ERLs) as numeric targets for sediment,which are the most protective applicable sediment guidelines. 4. Selecting the more stringent of the allowable concentration(as calculated by percent reduction methodology) or the numeric target for sediment(TEL or ERL), when available, as the WLA and LA for all reaches with 303(d) listings for sediment. Future Growth Ventura County accounts for slightly more than 2% of the state's residents with a population of 753,197 (US Census Bureau, 2000). GIS analysis of the 2000 census data yields a population estimate of 334,000 for the CCW, which equals about 44% of the county population. According to the Southern California Association of Govemments (SCAG), growth in Ventura County averaged about 51%per decade from 1900-2000; with growth exceeding 70% in the 1920s, 1950s, and 1960s. Significant population growth is expected to occur within and near present city limits until at least 'loll Page 8 July 7,2005 Attachment A to Resolution No. R4-2005-010 ;� ter, eIn t k:S?K tees f M- 2020. ;�PC ap ilt W6 4. 6 Since most of the listed OCs and PCBs in the CCW are banned,this growth is not expected to increase current loads. Urban application of those OC pesticides which are still legal (dacthal and endosulfan) may increase, but overall use may decrease because urban expansion tends to reduce total acreage of agricultural land. Population growth may result in greater OC loading to POTW influent from washing food products containing OC residues. This loading may be proportional to the increase in population, if per capita domestic water use and pesticide load per household remain constant. Increased flow from POTWs should not result in impairment of the CCW as long as effluent concentration standards are met for each POT'W. As urban development occurs, construction activities may have a range of effects on OC loading to the CCW. Exposure of previously vegetated or deeply buried soil might lead to increased rates of transportation and volatilization. Conversely, urbanization of open space and/or agriculture areas may cover OC pesticides bound to sediments. Future growth in the CCW may result in increased groundwater concentrations of currently used OC pesticides. This is a potential concern for dacthal, which is still used and has been found in groundwater(although current levels of dacthal are significantly lower than all available targets). The effects of future growth upon PCB loads are unknown,but not likely to prove significant, since atmospheric deposition and accidental spills are the primary loading pathways. Any increase in OCs due to population growth may be offset by decreased inputs from banned OCs, as their presence attenuates due to fate and transport processes. Critical The linkage analysis found correlation between concentrations of Conditions OC pesticides and PCBs in water and total suspended solids (TSS), and a potential correlation between OC pesticides and PCBs concentrations in water and seasonality (wet vs. dry season). A similar correlation between sediment loading and wet weather is also noted. OC pesticides and PCB pollutants are of potential concern in the Calleguas Creek Watershed due to possible long-term loading and food chain bioaccumulation effects. There is no evidence of short- term effects. However, pollutant loads and transport within the Page 9 July 7,2005 Attachment A to Resolution No. R4-2005-010 MD gm Nx MAI N watershed may vary under different flow and runoff conditions. Therefore the TMDLs consider seasonal variations in loads and flows but are established in a manner which accounts for the longer time horizon in which ecological effects may occur. Wet weather events, which may occur at any time of the year, produce extensive sediment redistribution and transport downstream. This would be considered the critical condition for loading. However, the effects of organochlorine compounds are manifested over long time periods in response to bioaccumulation in the food chain. Therefore, short-term loading variations (within the time scale of wet and dry seasons each year) are not likely to cause significant variations in beneficial use effects. Therefore, although seasonal variations in loads and flows were considered, the TMDL was established in a manner which accounts for the longer time horizon in which ecological effects may occur Implementation The final WLAs will be included in NPDES permits in accordance Plan with the compliance schedules provided in Table 7-17.2. The Regional Board may revise these WLAs based on additional information developed through Special Studies and/or Monitoring of this TMDL. WLAs established for the five major POTWs in this TMDL will be implemented through NPDES permit limits. The proposed permit limits will be applied as end-of-pipe concentration-based effluent limits for POTWs. Compliance will be determined through monitoring of final effluent discharge as defined in the NPDES permit. The implementation plan for POTWs focuses on implementation of source control activities. Consideration of annual averaging of compliance data will be evaluated at the time of permit renewal based on available information, Regional Board policies, and US EPA approval. In accordance with current practice, a group concentration-based WLA has been developed for MS4s, including the Caltrans MS4. The grouped allocation will apply to all NPDES-regulated municipal stormwater discharges in the CCW. Other NPDES- regulated stormwater pern-tittees will be assigned a concentration- based WLA consistent with the interim and final WLAs set forth above. Stormwater WLAs will be incorporated into the NPDES permit as receiving water limits measured at the downstream points of each subwatershed and are expected to be achieved through the implementation of BMPs as outlined in the implementation plan. Page 10 July 7,2005 Attachment A to Resolution No.R4-2005-010 Y �... DEfemnn� _� katexs ed� esb id'�PGB�s an�� d �hon a The Regional Board will need to ensure that permit conditions are consistent with the assumptions of the WLAs. If BMPs are to be used,the Regional Board will need to detail its findings and conclusions supporting the use of BMPs in the NPDES permit fact sheets. Should federal, state, or regional guidance or practice for implementing WLAs into permits be revised,the Regional Board may reevaluated the TMDL to incorporate such guidance. LAs will be implemented through the State's Nonpoint Source Pollution Control Program(NPSPCP). The LARWQCB is developing a Conditional Waiver for Irrigated Lands,which includes monitoring at sites subject to approval by the Executive Officer of the Regional Board. Should adoption of the Conditional Waiver be delayed, monitoring will be required as part of this TMDL. Studies are currently being conducted to assess the effectiveness of BMPs for reduction of pollutants from agricultural operations. Results will be used to develop Agricultural Water Quality Management Plans,including the implementation of agricultural BMPs. Additionally, an agricultural education program will be developed to inform growers of the recommended BMPs and the Management Plan. As shown in Table 7-17.2, implementation actions will be taken by agricultural dischargers located in the CCW. The implementation of agricultural BMPs will be based on a comprehensive approach to address pollutant loads discharged from agricultural operations. The Regional Board may revise these LAs based on the collection of additional information developed through special studies and/or monitoring conducted as part of this TMDL. A number of provisions in this TMDL might provide information that could result in revisions to the TMDL. Additionally, the development of sediment quality criteria and other water quality criteria revisions may require the reevaluation of this TMDL. Finally, the use of OC pesticides in other countries which may be present in imported food products, compounded with the persistence of OC pesticides and PCBs in the environment, indicate that efforts to control sources and transport of OCs to receiving waters may not result in attainment of targets and allocations due to activities that are outside the control of local agencies and agriculture. For these reasons, the Implementation Plan includes this provision for reevaluating the TMDL to consider revised water Page 11 July 7,2005 Attachment A to Resolution No. R4-2005-010 4� 1 le iii ft'U' ,u c `k�itateprslIId..1 ' ticide t s,an S ta�oq; F quality objectives and the results of implementation studies, if appropriate. The siltation portion of the TMDL includes wasteload and load allocations set as an annual mass reduction from a baseline value of sediment and silt deposited in Mugu Lagoon. The baseline value of sediment and silt conveyed to Mugu Lagoon is to be determined by a TMDL Special Study and established by the Regional Board through an amendment to the TMDL. The Special Study is eight years in duration to ensure that the full range of current conditions that affect loading of sediment and siltation to Mugu Lagoon are considered. If appropriate,the Special Study may also result in a revision to the mass load reduction. The Special Study will be overseen by a Science Advisory Panel consisting of local,regional, and/or national experts in estuarine habitat biology,hydrology, and engineering. At the conclusion of the special study, the Regional Board will reconsider the TMDL to establish sustainable wasteload and load allocations recommended by the Special Study to support aquatic life and wetland habitat beneficial uses. In implementing this TMDL, staff recognize that dischargers may be implementing management measures and management practices to reduce sediment and Siltation loads through permit and waiver programs during the special studies. Further, since the effective date of the Consent Decree,reaches of Calleguas Creek have been listed due to sediment, and another TMDL may be initiated during the Special Study of this TMDL. Staff's intent is to coordinate the requirements of this TMDL with other programs that reduce sedimentation and siltation. The Special Study can consider sediment and silt load reductions through existing permits and the forthcoming conditional waiver for irrigated lands. Load and wasteload allocations become effective after the Regional Board actions based on the Special Study, nine years after the effective date of the TMDL. �rr Page 12 July 7,2005 Attachment A to Resolution No. R4-2005-010 Table 7-17.2 Im lementation Schedule 1 Interim organochlorine pesticide and polychlorinated NPDES Permittees Effective date of the biphenyls wasteload allocations apply. amendment 2 Interim organochlorine pesticide and polychlorinated Agricultural Dischargers Effective date of the biphenyls load allocations apply. amendment Finalize and submit workplan for organochlorine pesticide and polychlorinated biphenyls TMDL monitoring,or finalize and submit a workplan for an Integrated CaIleguas Creek Watershed organochlorine pesticide and POTW Permittees,MS4 6 months after effective 3 polychlorinated biphenyls Monitoring Program for approval Permittees,Agricultural date of the amendment by the Executive Officer. The monitoring workplan will Dischargers,US Navy include,but not be limited to,appropriate water,biota,and sediment loading and monitoring to verify attainment of targets and protection of beneficial uses. Initiate Calleguas Creek Watershed organochlorine POTW Permittees,MS4 6 months after Executive pesticide,polychlorinated biphenyls,and siltation Officer approval of 4 Monitoring Program developed under the Task 3 workplan Disch argers,iar e ger r s,US Navy Agricultural Monitoring Program(Task Disc approved b the-Executive Officer. 3)workplan Submit a workplan for approval by the Executive Officer to identify urban,industrial and domestic sources of 5 organochlorine pesticides and polychlorinated biphenyls POTW Permittees,MS4 1 year after effective date and control methods and to implement a collection and Permittees,US Navy of the amendment disposal program for organochlorine pesticides and polychlorinated biphenyls. Submit a workplan for approval by the Executive Officer to 6 identify agricultural sources and methods to implement a Agricultural Dischargers 1 year after effective date r collection and disposal program for organochlorine of the amendment pesticides and polychlorinated biphenyls. Special Study#1 —Submit a workplan and convene a Science Advisory Panel to quantify sedimentation in Mugu Lagoon and sediment transport throughout the Calleguas Creek Watershed. Evaluate management methods to control siltation and contaminated sediment transport to Calleguas Creek,identify appropriate BMPs to reduce sediment loadings,evaluate numeric targets and wasteload and load allocations for siltation/sedimentation to support POTW Permittees,MS4 1 year after effective date 7 habitat related beneficial uses in Mugu Lagoon, evaluate Permittees,Agricultural of the amendment the effect of sediment on habitat preservation in Mugu Dischargers,and US Navy Lagoon,and evaluate appropriate habitat baseline, effectiveness of sediment and siltation load allocations on a subwatershed basis,and methods to restore habitat for approval by the Executive Officer. Additionally,this special study will evaluate the concentration of organochlorine pesticides and polychlorinated biphenyls in sediments from various sources/land use es.2 Page 13 July 7,2005 Attachment A to Resolution No. R4-2005-010 Develop an Agricultural Water Quality Management Plan in , consideration of the forthcoming Conditional Waiver for Irrigated Lands,or,if the Conditional Waiver for Irrigated 9 Lands is not adopted in a timely manner,develop an Agricultural Dischargers 3 years after effective date Agricultural Water Quality Management Plan as part of the of the amendment Calleguas Creek WMP. Implement an educational program on BMPs identified in the Agricultural Water Quality Management Plan. Based on results of the Task 5 workplan approved by 10 Executive Officer,implement a collection and disposal POTW Permittees,MS4 5 years after effective of program for organochlorine pesticides and polychlorinated Permittees,US Navy the amendment bi hen ls. Based on results of the Task 6 workplan approved by 11 Executive Officer implement a collection and disposal Agricultural Dischargers 5 years after effective of program for organochlorine pesticides and polychlorinated the amendment bi hen ls. Re-evaluation of POTW Interim wasteload allocations for 5 years, 10 years and 15 12 organochlorine pesticides and polychlorinated biphenyls Regional Board years after the effective based on State Implementation Plan procedures. date of the amendment Special Study#1 —Submit results of Special Study#1, POTW Permittees,MS4 g years after effective date 13 including recommendations for refining the siltation load Permittees,Agricultural of the amendment and wasteload allocations. Dischargers,and US Navy 14 Re-evaluation of siltation and sediment load and wasteload Regional Board 9 years after effective date allocations based on Special Stud #1. of the amendment 15 Effective date of siltation load allocation and wasteload Agricultural dischargers, 9 years after effective date allocation. US Navy,MS4 permittees of the amendment Special Study#3—Evaluate natural attenuation rates and POTW Permittees, evaluate methods to accelerate organochlorine pesticide Agricultural Dischargers, 10 years after effective date 16 and polychlorinated biphenyl attenuation and examine the MS4 Permittees,and US of the amendment attainability of wasteload and load allocations in the Calleguas Creek Watershed.2.3 Navy Special Study#4(optional)—Examine of the food web and bioconcentration relationships throughout the watershed to 12 years after effective date 17 evaluate assumptions contained in the Linkage Analysis and Interested Parties of the amendment ensure that protection of beneficial uses is achieved.2 Based on the results of Implementation Items 1-17,if sediment guidelines are promulgated or water quality criteria are revised,and/or if fish tissue and water column 10 years after effective date 18 targets are achieved without attainment of WLAs or LAs, Regional Board of the amendment the Regional Board will consider revisions to the TMDL targets,allocations,and schedule for expiration of Interim Wasteload and Interim Load Allocations.3 Agricultural Dischargers, 20 years after effective date 19 Achieve Final WLAs and LAs POTW Permittees,and MS4 Permittees of the amendment Page 14 July 7,2005 Attachment A to Resolution No.114-2005-010 The Regional Board regulatory programs addressing all discharges in effect at the time an implementation task is due may contain requirements substantially similar to the requirements of an implementation task. If such a requirement is in place in another regulatory program including other TMDLs,the Executive Officer may determine that such other requirements satisfy the requirements of an implementation task of this TMDL and thereby coordinate this TMDL implementation plan with other regulatory rograms. Special studies included in the Implementation Plan are based on the TMDL Technical Documents. r After completion of this special study,.the TMDL will be reopened in order to enable the Regional Board to evaluate whether a shorter time period is appropriate for the achievement of the final WLAs and LAs. Page 15 July 7, 2005 Exhibit D — Metals State of California California Regional Water Quality Control Board Los Angeles Region Resolution No. R4-2006-0912 June 8, 2006 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a Total Maximum Daily Load for Metals for Calleguas Creek, its Tributaries, and Mugu Lagoon Exhibit D State of California California Regional Water Quality Control Board,Los Angeles Region RESOLUTION NO. 114-2006-012 June 8,2006 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a Total Maximum Daily Load for Metals for the Calleguas Creek,its Tributaries,and Mugu Lagoon WHEREAS, the California Regional 'Water Quality Control Board, Los Angeles Region, finds that: I. The Federal Clean Water Act(CWA)requires the California Regional Water Quality Control Board, Los Angles Region (Regional Board) to develop water quality objectives, which are sufficient to protect beneficial uses for each water body found within its region. Water bodies that do not meet water quality objectives or support beneficial uses are considered impaired. 2. A consent decree between the U.S. Environmental Protection Agency (U.S. EPA), Heal the Bay,Inc. and BayKeeper, Inc.was approved on March 22, 1999. This court order directs the U.S. EPA to complete Total Maximum Daily Loads(TMDLs) for all impaired waters within 13 years. A schedule was established in the consent decree for the completion of the first 29 TMDLs within 7 years, including completion of a TMDL to reduce metals in the Calleguas Creek, its tributaries, and Mugu Lagoon by U.S. EPA by March 22, 2007. The remaining TMDLs will be scheduled by Regional Board staff within the 13-year period. 3. The elements of a TMDL are described in 40 CFR 130.2 and 130.7 and section 303(d)of the CWA, as well as in U.S. EPA guidance documents (Report No. EPA/440/4-91/001). A TMDL is defined as the sum of the individual waste load allocations for point sources, load allocations for nonpoint sources and natural background(40 CFR 130.2). Regulations further stipulate that TMDLs must be set at levels necessary to attain and maintain the applicable narrative and numeric water quality standards with seasonal variations and a margin of safety that takes into account any lack of knowledge concerning the relationship between effluent limitations and water quality (40 CFR 1303(c)(1)). The regulations in 40 CFR 130.7 also state that TMDLs shall take into account critical conditions for stream flow, loading and water quality parameters. 4. The numeric targets in this TMDL are not water quality objectives and do not create new bases for enforcement against dischargers apart from the existing, numeric water quality standards they translate.The targets merely establish the bases through which load allocations (LAs) and waste load allocations (WLAs) are calculated. WLAs are only enforced for a discharger's own discharges,and then only in the context of its National Pollutant Discharge Elimination System (NPDES)permit,which must contain effluent limits consistent with the assumptions and requirements of the WLA (40 C.F.R. 122.44(d)(vii)(B)). The Regional Board will develop permit requirements through subsequent permit actions that will allow all interested persons,including but not limited to municipal storm water dischargers,to provide comments on how the WLA will be translated into permit requirements. Resolution No.R4-2006-012 Page 2 **blow 5. As envisioned by Water Code section 13242, the TMDL contains a "description of surveillance to be undertaken to determine compliance with objectives." The Compliance Monitoring and Special Studies elements of the TMDL recognize that monitoring will be necessary to assess the on-going condition of the Calleguas Creek, its tributaries, and Mugu Lagoon and to assess the on-going effectiveness of efforts by dischargers to reduce metals . loading to the Calleguas Creek. Special studies may also be appropriate to provide further information about new data, new or alternative sources, and revised scientific assumptions. The TMDL does not establish the requirements for these monitoring programs or reports, although it does recognize the type of information that will be necessary to secure. The Regional Board's Executive Officer will issue orders to appropriate entities to develop and to submit monitoring programs and technical reports. The Executive Officer will determine the scope of these programs and reports,taking into account any legal requirements,and issue the orders to the appropriate entities. 6. Upon establishment of TMDLs by the State or U.S. EPA, the State is required to incorporate the TMDLs along with appropriate implementation measures into the State Water Quality Management Plan(40 CFR 130.6(c)(1), 130.7). This Water Quality Control Plan for the Los Angeles Region (Basin Plan), and applicable statewide plans, serves as the State Water Quality Management Plans governing the watersheds under the jurisdiction of the Regional Board. Attachment A to this resolution contains the Basin Planning language for this TMDL. 7. The Calleguas Creek Watershed is located in southeast Ventura County, California, and in a small portion of western Los Angeles County, and drains an area of approximately 343 square miles from the Santa Susana Pass in the east, to Mugu Lagoon in the southwest. Current land use is approximately 26 percent agriculture, 24 percent urban, and 50 percent open space. The tributaries and the streams of the Calleguas Creek Watershed are divided `�--- into fourteen segments, or reaches. The 2002 Clean Water Act 303(d) list identified lower reaches of the Calleguas Creek watershed(reach 1,2,and 3)as impaired for copper,mercury, nickel, selenium, and zinc. These listings were approved by the State Water Resources Control Board on February 4, 2003. The proposed TMDL addresses impairments of water quality caused by these metals in lower reaches of the Calleguas Creek Watershed. 8. On May 18, 2000, the USEPA promulgated numeric criteria for priority pollutants for the State of California,known as the California Toxics Rule (CTR), codified as 40 CFR section 131.38. Federal water quality standards under section 303 of the Clean Water Act consist of designated uses and criteria to protect those uses. (40 C.F.R. 131.3(i)). Designated uses are beneficial uses under state law, and criteria are water quality objectives under state law.The CTR establishes the numeric water quality objectives for various toxic pollutants. These objectives apply "without exeception" to all inland surface waters within the State of California, including the Los Angeles region.(40 C.F.R. 131.38(d)(1)-(2)). 9. "[Ijt is the national policy that the discharge of toxic pollutants in toxic amounts be prohibited." (33 U.S.C. 125l(a)(3).) Water quality standards, including the CTR,reflect this express national policy of Congress. When a pollutant is present at levels in excess of the CTR numbers, then the pollutant is present in toxic amounts. In this sense, the numeric objectives in the CTR are USEPA's determination of when priority pollutants are present at toxic amounts in contravention of Congress's national policy. 10. The Regional Board's goal in establishing the Calleguas Creek Metals TMDL is to protect the aquatic life and wildlife beneficial uses of Calleguas Creek, its tributaries, and Mugu �.r Resolution No.R4-2006-012 Page 3 Lagoon, and to achieve the numeric water quality objectives set to protect these uses as contained in the CTR. 11. The water quality targets for copper in the TMDL are expressed as the copper water quality objective multiplied by a water-effect ratio (WER) consistent with the federal California Toxics Rule (CTR). A WER is a means to account for a difference between the toxicity of copper in laboratory dilution water and its toxicity in local waterbodies. A WER of 1.0 indicates equivalence between local waters and laboratory dilution water, while a WER of greater (less) than 1.0 indicates lower (higher) toxicity in local waters than in laboratory dilution waters. The water-effect ratio(WER)has a default value of 1.0 unless a site-specific WER is approved. To use a WER other than the default of 1.0, a study must be conducted consistent with USEPA's WER guidance and adopted by the Regional Board through the state's basin plan amendment process. 12. A WER study for Mugu Lagoon (Reach 1) lower Calleguas Creek (Reach 2), Revolon Slough(Reach 4)and Beardsley Wash(Reach 5)was conducted by Larry Walker Associates for the Calleguas Creek Management Group with involvement by Regional Board staff. A draft technical report dated September 21, 2005 contains recommended WERs of 2.13 for Mugu Lagoon and Revolon Slough and 4.06 for lower Calleguas Creek. 13. Regional Board staff commented on the draft report in a letter to Lary Walker Associates dated March 15, 2006. Regional Board staff identified several concerns and data limitations of the study that constrained the scientifically defensible alternatives available to the Board. Given these data limitations and unresolved technical issues,Regional Board staff proposed a single WER for the lagoon and lower creek that would be protective. Regional Board staff agreed to reconsider this single WER value if additional wet weather data were collected in the creek and technical issues were resolved. In response to Regional Board comments,Lang Walker Associates sampled an additional wet weather event on April 14, 2006 and Regional Board staff is actively engaged in discussions with Larry Walker Associates and independent technical experts to resolve other technical issues. 14. Upon resolution of these issues,Regional Board staff will recommend site-specific WERs for Mugu Lagoon (Reach 1), lower Calleguas Creek (Reach 2), Revolon Slough (Reach 4) and Beardsley Wash (Reach 5) to the Regional Board. Prior to Regional Board consideration, the proposed basin plan amendment to incorporate site-specific WERs must be submitted for peer review as required by Health and Safety Code section 57004 and be subject to public review and comment. 15. If site-specific WERs are approved by the Regional Board,the TMDL targets and allocations shall be implemented in accordance with the approved WERs using the equations set forth in Table 7-19.1 under "Numeric Targets", "Waste Load Allocations" and "Load Allocations", of the TMDL. 16. Calleguas Creek stakeholders have been actively engaged with USEPA and the Regional Board on a variety of watershed planning initiatives in the Calleguas Creek Watershed. Key stakeholders have formed the Calleguas Creek Watershed Management Plan (CCWMP), an established,stakeholder-led watershed management group that has been continually operating since 1996. The CCWMP has broad participation from federal, State and county agencies, municipalities, POTWs, water purveyors, groundwater management agencies, and agricultural and environmental groups. As part of its mission to address issues of long-range comprehensive water resources; land use; economic development; open space preservation, Resolution No.R4-2006-012 Page 4 enhancement and management,the CCWMP proposed to USEPA and Regional Board to take the lead on development of the TMDLs. 17. Regional Board staff have worked with the CCWMP and USEPA in the development of a detailed technical document that analyzes and describes the specific necessity and rationale for the development of this TMDL. The technical document entitled "Calleguas Creek Watershed Metals and Selenium TMDL" prepared by Larry Walker Associates is an integral part of this Regional Board action and was reviewed, and accepted by the Regional Board as a supporting technical analysis before acting. The technical document provides the detailed factual basis and analysis supporting the problem statement,numeric targets(interpretation of the narrative and numeric water quality objectives, used to calculate the pollutant allocations),source analysis, linkage analysis,waste load allocations(for point sources),load allocation (for nonpoint sources), margin of safety, and seasonal variations and critical conditions of this TMDL. 18. On June 8, 2006, prior to the Board's action on this resolution, public hearings were conducted on the Calleguas Creek Watershed Metals TMDL. Notice of the hearing for the Calleguas Creek Watershed Metals TMDL was published in accordance with the requirements of Water Code Section 13244. This notice was published in the Ventura County Star on April 10,2006. 19. The public has had reasonable opportunity to participate in the review of the amendment to the Basin Plan. A draft of the Calleguas Creek Watershed Metals TMDL was released for public comment on March 30,2006;a Notice of Hearing and Notice of Filing were published and circulated 45 days preceding Board action; Regional Board staff responded to oral and written comments received from the public; and the Regional Board held a public hearing on June 8, 2006 to consider adoption of the TMDL. 20. In amending the Basin Plan, the Regional Board considered the requirements set forth in Sections 13240 and 13242 of the California Water Code. 21. Because the TMDL implements existing numeric water quality objectives (i.e., the numeric water quality criteria established by U.S. EPA in the CTR), the Regional Board has consistently maintained(along with the State Water Resources Control Board)that adopting a TMDL does not require the water boards to consider the factors of Water Code section 13241. The consideration of the Water Code section 13241 factors, by section 13241's express terms, only applies "in establishing water quality objectives." Here the Regional Board is not establishing water quality objectives,but as required by section 303(d)(1)(C) of the Clean Water Act is adopting a TMDL that will implement the previously established objectives that have not been achieved. 22. While the Regional Board is not required to consider the factors of Water Code section 13241, it, nonetheless, has developed and received significant information pertaining to the Water Code section 13241 factors and considered that information in developing and adopting this TMDL. The past, present, and probable future beneficial uses of water have been considered in that the Calleguas Creek is designated for a multitude of beneficial uses in the Basin Plan. Various living organisms (including vegetation, fish, invertebrates, and wildlife) are present in, transient through, and will be present in the Calleguas Creek. Dry weather surface water in the Calleguas Creek watershed is primarily composed of groundwater, municipal wastewater, urban non-stormwater discharges, and agricultural ,,.. runoff. In the upper reaches of the watershed, upstream of any wastewater discharges, Now Resolution No.R4-2006-012 Page 5 groundwater discharge from shallow surface aquifers provide a constant base flow. "Storm- peaking" refers to peak discharges limited to a wet weather season and concentrated into a few days after short-term, discrete storm events,when flow commonly is two to three orders of magnitude greater than non-storm flow. The environmental characteristics of the Calleguas Creek are spelled out-at length in the Basin Plan and in the technical documents supporting this Basin Plan amendment, and have been considered in developing this TMDL. Water quality conditions that reasonably could be achieved through the coordinated control of all factors which affect water quality in the area have been considered via the discussion of likely means of compliance, and-studies indicating that a mix of best management practices (BMPs), rather than advanced treatment plants, would achieve the water quality criteria established in the CTR. Authorizing certain storm water dischargers to rely on BMPs in the first instances reflects the reasonableness of the action in terms of the ability to implement the requirements, as well as a belief that the water quality conditions can reasonably be achieved in any event. Establishing a plan that will ensure the Calleguas Creek is not toxic is a reasonable water quality condition. However, to the extent that there would be any conflict between the consideration of the factor in Water Code section 13241 subdivision (c), if the consideration were required, and the Clean Water Act, the Clean Water Act would prevail. Notably,national policy established by Congress prohibits the discharge of toxic pollutants in toxic amounts. Economic considerations were considered throughout the development of the TMDL. Some of these economic considerations arise in the context of Public Resources Code section 21159 and are equally applicable here. This implementation program recognizes the economic limitations on achieving immediate compliance-especially for municipal storm water dischargers. The TMDL also authorizes the use of BMPs, to the extent authorized by law, for various storm water dischargers. Economic considerations were considered and are reflected in an implementation program that is flexible and allows 10 years for POTWs, and 15 years for agricultural and permitted stormwater dischargers to comply with the final allocations. The need for housing within the region has been considered, but this TMDL is unlikely to affect housing needs. Whatever housing impacts could materialize are ameliorated by the flexible nature of this TMDL and the implementation schedule. 23. The amendment is consistent with the State Antidegradation Policy (State Board Resolution No. 68-16), in that it does not authorize any lowering of water quality and is designed to implement existing water quality objectives. Likewise,the amendment is consistent with the federal Antidegradation Policy(40 CFR 131.12). 24. Pursuant to Public Resources Code section 21080.5, the Resources Agency has approved the Regional Water Boards' basin planning process as a "certified regulatory program" that adequately satisfies the California Environmental Quality Act (CEQA) (Public Resources Code, Section 21000 et seq.)requirements for preparing environmental documents. (14 Cal. Code Regs. § 15251(g); 23 Cal. Code Regs. § 3782.) As such, the Regional Water Board's basin planning documents together with an Environmental Checklist, are the "substitute documents" that contain the required environmental documentation under CEQA. (23 Cal Code Regs. § 3777.) The detailed technical report entitled "Calleguas Creek Watershed Metals and Selenium TMDL", this resolution, and the Environmental Checklist serve as the substitute documents for this project. The project itself is the establishment of a TMDL for toxic metals in the Calleguas Creek, its tributaries, and Mugu Lagoon. While the Regional Board has no discretion to not establish a TMDL (the TMDL is required by federal law) or for determining the water quality standard to be applied (the CTR establishes the numeric water quality objectives that must be implemented), the Board does exercise discretion in assigning waste load allocations and load allocations, determining the program of Resolution No.R4-2006-012 Page 6 implementation, and setting various milestones in achieving the numeric water quality standards established in the CTR. 25. A CEQA Scoping hearing was conducted on January 26,2006 in the City of Thousand Oaks, 2100 E. Thousand Oaks Blvd., Thousand Oaks, California. A notice of the CEQA Scoping hearing was sent to interested parties including cities and/or counties with jurisdiction in or bordering the Calleguas Creek watershed. 26. The lengthy implementation period allowed by the TMDL, will allow rpany compliance approaches to be pursued. In preparing the accompanying CEQA substitute documents, the Regional Board has considered the requirements of Public Resources Code section 21159 and Califomia Code of Regulations, title 14, section 15187,and intends the substitute documents to serve as a tier 1 environmental review. Many compliance obligations will be undertaken directly by public agencies that will have their own obligations under CEQA. In addition, public agencies such as the Ventura County, Farm Bureau and the Resource Conservation Disctrict, are expected to facilitate compliance obligations per participated growers, and to the extent that the proposed projects including installation of BMPs, are subject to project- level CEQA analysis, the public agency may assume those responsibilities. Individual growers who propose BMPs that impact waters of the State through dredge or fill operations will be subjected to applicable State and federal permitting requirements. In this instance,the "Lead" State agency will assure compliance with project-level CEQA analysis. Project level impacts will need to be considered in any subsequent environmental analysis performed by other public agencies, pursuant to Public Resources Code section 21159.2. If not properly mitigated at the project level, there could be adverse environmental impacts. The substitute documents for this TMDL, and in particular the Environmental Checklist and staff's responses to comments,identify broad mitigation approaches that should be considered at the project level. Consistent with CEQA, the substitute documents do not engage in speculation or conjecture and only consider the reasonably foreseeable environmental impacts of the methods of compliance, the reasonably foreseeable feasible mitigation measures, and the reasonably foreseeable alternative means of compliance, which would avoid or eliminate the identified impacts. 27. The proposed amendment could have a significant adverse effect on the environment. However, there are feasible alternatives, feasible mitigation measures, or both that would substantially lessen any significant adverse impact.The public agencies responsible for those parts of the project can and should incorporate such alternatives and mitigation into any subsequent projects or project approvals.Possible alternatives and mitigation are described in the CEQA substitute documents, specifically the TMDL technical report and the Environmental Checklist.To the extent the alternatives, mitigation measures, or both are not deemed feasible by those agencies, the necessity of implementing the federally required metals TMDL and removing the metals-related toxicity impairment from the Calleguas Creek (an action required to achieve the express, national policy of the Clean Water Act) outweigh the unavoidable adverse environmental effects. 28. Health and Safety Code section 57004 requires external scientific peer review for certain water quality control policies. Prior to public notice of the draft TMDL, the Regional Board submitted the scientific basis and scientific portions of the Calleguas Creek Watershed Metals and Selenium TMDL to Theo Dillaha, Ph.D., P.E. (Virginia Tech) and Rhea L.Williamson, Ph.D. (San Jose State University) for external scientific peer review. Written peer review reports were received by the Regional Board. Minor modifications were made to the Resolution No.114-2006-012 Page 7 scientific portions of the TMDL to address concerns identified during the peer review process. 29. The regulatory action meets the "Necessity" standard of the Administrative Procedures Act, Government Code, Section 11353, Subdivision (b). As specified above, federal regulations require that TMDLs be incorporated into the water quality management plan. The Regional Board's Basin Plan is the Regional Board's component of the water quality management plan,and the Basin Plan is how the Regional Board takes quasi-legislative, planning actions. Moreover, the TMDL is a program of implementation for existing water quality objectives, and is, therefore, appropriately a component of the Basin Plan under Water Code section 13242. The necessity of developing a TMDL is established in the TMDL staff report, the section 303(d) list, and the data contained in the administrative record documenting the metals impairments of the Calleguas Creek, its tributaries,and Mugu Lagoon. 30. The Basin Plan amendment incorporating a TMDL for metals for the Callegus Creek, its Tributaries,and Mugu Lagoon must be submitted for review and approval by the State Water Resources Control Board (State Board), the State Office of Administrative Law (GAL), and the U.S. EPA. The Basin Plan amendment will become effective upon approval by U.S.EPA. A Notice of Decision will be filed with the Resources Agency. THEREFORE,be It resolved that pursuant to sections 13240 and 13242 of the Water Code, the Regional Board hereby amends the Basin Plan as follows: 1. Pursuant to Sections 13240 and 13242 of the California Water Code, the Regional Board, �...- after considering the entire record, including oral testimony at the hearing, hereby adopts the amendments to Chapter 7 of the Water Quality Control Plan for the Los Angeles Region, as set forth in Attachment A hereto, to incorporate the elements of the Calleguas Creek, its Tributaries, and Mugu Lagoon Metals TMDL. 2. The Executive Officer is directed to forward copies of the Basin Plan amendment to the State Board in accordance with the requirements of section 13245 of the California Water Code. 3. . The Regional Board requests that the State Board approve the Basin Plan amendment in accordance with the requirements of sections 13245 and 13246 of the California Water Code and forward it to OAL and the U.S.EPA. 4. If during its approval process Regional Board staff, the State Board or OAL determines that minor, non-substantive corrections to the language of the amendment are needed for clarity or consistency, the Executive Officer may make such changes, and shall inform the Board of any such changes. 5. The Executive Officer is authorized to sign a Certificate of Fee Exemption. Resolution No.842006-012 Page 8 1, Jonathan Bishop, Executive Officer, do hereby certify that the foregoing is a full, true, and correct copy of a resolution adopted by the California Regional Water Quality Control Board,Los Angeles Region, on June 8,2006. nathan S.Bishop Date Executive Officer `.r Exhibit D — Metals Attachment A to Resolution No. R4-2006-012 Proposed Amendment to the Water Quality Control Plan for the Los Angeles Region To Incorporate the Total Maximum Daily Load for Metals and Selenium in the Calleguas Creek, its Tributaries, and Mugu Lagoon Exhibit D Attachment A to Resolution No. R4-2006-012 Proposed Amendment to the Water Quality Control Plan—Los Angeles Region to Incorporate the Total Maximum Daily Load for Metals and Selenium in the Calleguas Creek, its Tributaries and Mugu Lagoon Adopted by the California Regional Water Quality Control Board,Los Angeles Region on June 8,2006 Amendments Table of Contents Add: Chapter 7.Total Maximum Daily Loads(TMDLs) 7- 19 Calleguas Creek Watershed Metals and Selenium TMDL List of Figures,Tables, and Inserts Add: Chapter 7. Total Maximum Daily Loads(TMDLs) Tables 7-19 Calleguas Creek Watershed Metals and Selenium TMDL 7-19.1. Calleguas Creek Watershed Metals and Selenium TMDL: Elements 7-19.2. Calleguas Creek Watershed Metals and Selenium TMDL: Implementation Schedule Chapter 7. Total Maximum Daily Loads(TMDLs) Calleguas Creek Watershed Metals and Selenium TMDL This TMDL was adopted by: The Regional Water Quality Control Board on.tune 8, 2006. This TMDL was approved by: The State Water Resources Control Board on[Insert date]. The Office of Administrative Law on [Insert date]. The U.S. Environmental Protection Agency on [Insert date]. The elements of the TMDL are presented in Table 7-19.1 and the Implementation Plan in r- Table 7-19.2 June 8, 2006 - l - Attachment A to Resolution No.114-2006-012 Table 7-19.1. Calleguas Creek Watershed Metals and Selenium TMDL: Elements TMDL Element.= Calleguas Creek W- e*_,__ Metals and SelenWm TMDL � Problem Three of fourteen reaches in the Calleguas Creek Watershed(CCW) Statement including Revolon Slough,Lower Calleguas Creek—Reach 2, and Mugu Lagoon are identified on the 2002 Clean Water Act Section 303(d)list of water-quality limited segments as impaired due to elevated levels of metals and selenium in water. The 303(d) listings, which were approved by the State Water Resources Control Board in February 2003, require the development of TMDLs to establish the maximum amount of pollutants a water body can receive without exceeding water quality standards. TMDLs for listed metals and selenium are presented herein in one document because,as a class of compounds,they possess similar physical and chemical properties that influence their persistence, fate,and transport in the environment. Numeric Targets This TMDL establishes four types of numeric targets: (1)CTR criteria in dissolved fraction for copper,nickel, and zinc, and in total recoverable form for mercury and selenium; (2)Fish tissue targets for mercury;(3)Bird egg targets for mercury and selenium; and (4) Sediment quality guidelines for copper,nickel, and zinc for 303(d) listed reaches. Attainment of sediment quality targets will be evaluated in combination with sediment toxicity data,if available. 1. Co r Targets Water Quality Target Sediment Target Subwatershed (erg dissolved Copper/L) (SQaiRTs,ERL) Dry Weather Wet Weather (ppb) CCC CMC Mugu La non 3.I•WER' 4.8'WER' 34000 Calleguas Creek 2 3.1•WER' 4.8"WER' 340M Calleguas Creek 3 25.9 26.3 NAr Revolon/Beardsle 3.1•WER' 4.8'WER' NA' Cone'o 27.9 41.6 NAr Arroyo Simi/Las Posas 29.3 29.8 NA= The water quality targets for copper in the TMDL are expressed as the copper water quality criteria from the federal California Toxics Rule(CTR).Thoso critcria include a numerical threshold multiplied by a water-effect ratio(WER). The WER has a default value of 1.0 unless s site-specific WF.R is approved.To use a WER other than the default of 1.0.a study must be conducted consistent with USEPA's WER guidance and adopted by the Regional Board through the state's basin plan amendment process.A WER study for Mugu Lagoon(Reach t),lower Calleguas Creek(Reach 2),Revolon Slough (Reach 4)and Beardsley Wash(Rath 5)has been submitted to the Regional Board.If the Regional Board approves site-specific WERs for copper in these waterbodies,the TMDL targets will be modified in accordance with all legal and regulatory requirements and implemented io accordance with the approved WERs using the equations set forth in Table 7-19.1 above. r Sediment targets were not selected as alternative target for this reach as it is not on the 303(d)list. June 8, 2006 - 2 - Attachment A to Resolution No. R4-2006-012 TM -4flement Creek.Watershed:6Ctals Ai Selenium TMDL 2. Mercury Targets a) Fish Tissue(Human Health): 0.3 mg methyhmercury/kg wet weight b) Fish Tissue(Wildlife): ❖ Trophic Level(TL)3' <50 mm:0.03 mg rnethyltnercury/kg wet weight ❖ TO 50-150n m: 0.05 mg methylmercury/kg wet weight ❖ TO 150-350mm: 0.1 mg methylmercury/kg wet weight c) Bird Egg(Wildlife): less than 0.5 mg total mercury/kg wet weight d) Water Column Target: 0.051 ug total mercury/L 'Tropic Level 3: Predators(e.g.,minnows,sunfish) on tropic level 2 organism(e.g.,copepods and water fleas) 3. Nickel Targets Water Quality Target Sediment Target Subwatershed (ug dissolved Nickel/L) (SQuiRTs,ERL) Dry Weather Wet Weather (ppb) CCC CMC Mugu Lagoon 8.2 74 20900 Call as Creek 2 8.2 74 NA' Call as Creek 3 149 856 NA' Revolon/Beardsle 8.2 74 NA' Cone o 160 1292 NA' Arro o Simi/Las Posits 168 958 NA' 'Sediment targets were not selected as alternative target for this reach as it is not listed on the 303(d)list. A study to support a SSO for nickel has been submitted to the Regional Board and is currently under reviewed by the Regional Board and U.S.EPA staff. If a SSO for nickel is approved,the Regional Board will consider revision to the numeric targets for nickel based on the approved SSO. 4. Selenium Targets Water Quality Target Subwatershed (ug Total Selenium/L) Bird Egg Dry Weather Wet Weather (ug/g) CCC CMC Mugu Lagoon 71 290 6 Calleguas Creek 2 5 290 6 Calleguas Creek 3 5 NA' 6 Revolon/Beardsley 5 290 6 Cone o 5 NA' 6 Arroyo Simi/Las Posas 5 NA' 6 "NA"indicates that a target is not available for this constituent as criterion for fresh water is not defined in the CTR `rr+ June 8,2406 - 3 - Attachment A to Resolution No.R4-2006-012 TMD€ lement Callegui r k.'Watershed�lVleta"ll� Selenium TNIDL 5. Zinc Targets Water Quality Target Sediment Target Subwatershed u dissolved ZincAL S Ts,ERL Dry Weather Wet Weather (ppb) CCC CMC Mugu Lagoon 81 90 150404 CaUe uas Creek 2 81 90 NA' Celle uasCreek3 338 214 NA' Revolon/Beardsle 81 .90 NA' Cone o 365 324 NA' Arroyo Simi/Las Posas 382 240 NA' Sediment targets wcrc not selected as alternative target for this roach as it is not nn the 303(d)list Source Analysis Significant sources of metals and selenium include urban runoff, agricultural runoff,groundwater seepage, and POTW effluent.For mercury,open space was also a significant source. Sources were also analyzed as a function of wet and dry weather. Higher loads were delivered during wet weather for all constituents, due to the association between metals and particulate matter.. The source analysis indicates naturally occurring mercury in soil may be a significant source,naturally occurring nickel,copper,zinc,and selenium in sail may be a contributing source and naturally occurring selenium in groundwater may be a significant source. The TMDL Implementation Plan also includes special studies to address natural sources of metals in soil. Linkage Analysis Linkage between sources and instream pollutant concentrations was established through a dynamic water quality Hydrologic Simulation Program—FORTRAN(HSPF). The model output generally resulted in a conservative estimate of receiving water concentrations for metals. The model was used to calculate load reductions necessary to meet Numeric Targets. The load and waste load allocations were calculated based on the load reductions required to meet the numeric targets. Waste Load In the case of copper,nickel, and selenium,waste load allocations Allocations (WLAs)are developed for both wet and dry-weather.The dry-weather WLAs apply to days when flows in the stream are less than the 86h percentile flow rate for each reach. The wet-weather WLAs apply to days when flows in the stream exceed the 86h percentile flow rate for each reach. Annual mass loads of mercury in suspended sediment were developed according to low,medium, and high annual flow categories. A margin of safety of 15% was included in the WLAs for copper and nickel. June 8,2006 -4- Attachment A to Resolution No.R42006-012 _ - ---.- �r T1�DL Element Calleguas Creek: te �lVfeta4_ POTWs Concentration-based and mass-based WLAs are established for copper, nickel,and selenium in total recoverable forms, and are applied to POTWs during both wet and dry weather. Mass-based WLAs are developed for mercury for POTWs. Zinc allocations are not set because current information indicate that numeric targets for zinc are attained. The TMDL Implementation Plan includes a task to provide State Board data to support delisting of zinc. Waste load allocations for selenium are not set for POTWs because POTWs do not discharge to reaches listed for selenium. A margin of safety of 15%was included in the WLAs for copper and nickel. Interim limits are included to allow time for dischargers to put in place implementation measures necessary to achieve final waste load allocations. The daily maximum and monthly average interim limits are set equal to the 99`h and 95th percentile of available discharge data respectively. 1. Interim and Final WLAs for Total Recoverable Copper in Water Column Intarim Final* POTW Daily Monthly Dally Monthly Maximum Average Maximum Average lb/day (ug/L) (ugfL) (uglL)" (ug/L)" Hill Canyon 0.11'WER- WWTP 20.0 16.0 (a) (a) 404 Siml Valley (b) (b) 31.0 30.5 (o) WQCP Moorpark WTP Camarillo 0.12"WER- E:t: 57.0 20.0 {a) (a) (b) (b) 27.4 27 0 (d) ' if site-specific WERs are approved by the Regional Board,TMDL waste load allocations shall be implemented in accordance with the approved WERs using the equations set forth above. Regardless of the fnat WERs,total copper loading shall not exceed current loading. In addition,effluent concentrations shall not exceed the performance standards of current treatment technologies. '• Concentration-based targets bavc been converted to total recoverable allocations using the CTR default translator of 096 (a) Concentration-based final limits will be included in the permits in accordance with NPDES guidance and requirements,but are not calculated as part of the TMDL. (b) interim limits arc not required because the discharger is meeting the final limits. (c) Discharges from Simi Valley WQCP do not reach lower Calleguas Creek and Mugu lagoon during dry weather. Monitoring will be conducted and mass-based WLAs will be evaluated if targets are not met in Arroyo Simi/W Posas or downstream reaches. (d) Discharger does not contribute loading during dry weather.Concentration-based WLAs apply during wet weather when discharges occur. Monitoring will be conducted and nun-based WLAs will be evaluated if targets are not met in receiving water and/or downstream reaches. 2. Interim and Final WLAs for Total Recoverable Nickel in Water Column qtr✓ June 8, 2006 - 5 - Attachment A to Resolution No.R42006-012 `r `TMD ,lement _ was.Creek Watersii au1 L Itnarim Final POTW Daily Monthly Dally Monthly Maximum Average Maximum Average lb/day u !L) OWL)" Hill Canyon 8.3 6.4 (a) (a) 0.3 WWTP Simi Valley (b) (b) 200 1= (C) WQCP Moorpark (b) (b) 960.0 16910 (d) WTP CamaMilo 16.0 6.2 (a) (a) 0.2 WRP Camrosa (b) (b) 858.0 1Q (d) WRP " Concentration-based targets have been converted to total recoverable allocations using the CTR default translator of 0.998. "Concentration-based targets have been converted to total recoverable allocations using the CTR default translator of 0.997. (a) Concentration-based final limits will be included in the permits in accordance with NPDF.S guidance and requirements,but are not calculated as part of the TMDL. (b) Interim limits are not required because the discharger is meeting the fmal limits. (c) Discharges from Simi Valley WQCP do not reach lower Calleguas Creek and Mugu lagoon during dry weather. Monitoring will be conducted and[Hass-based WLAs will be evaluated if targets are not met in Arroyo Simi&as Posas or downstream reaches, (d) Discharger does not contribute loading during dry weather.Concentration-based WLAs apply during wet weather when discharges occur. Monitoring will be conducted and mass-based WLAs will be evaluated if targets are not met in receiving wa ter and/or downstream reaches. A study to support a SSO for nickel has been submitted to the Regional Board and is currently under reviewed by the Regional Board and U.S.EPA stab. If a SSO for nickel is approved,the Regional Board will consider revision to the final WLAs for nickel based on the approved SSO. 3. Interims and Final WLAs for Mercury in Suspended Sediment: Waste load allocations for POTWs are based on the median monthly mercury effluent concentrations which are currently more stringent than the numeric targets multiplied by the design flow where the total load in water is assumed equal to the suspended sediment load Interim WLAs for are based on 90th percentile concentration observed in effluent discharge and design flow and apply to all flow conditions. PQTW Interim Final (lb/month) (Ib/month) Hill Canyon WWTP 013 0.022 Simi Valley WQCP 0.16 0.031 Moorpark WTP WA WA Camarillo WRP 0.03 0.015 Camrosa WRP N/A NIA June 8, 2006 -6_ Attachment A to Resolution No. R4-2006-012 �.r __T L Eleiaient . Calleguas Creek Wa e T ed Metals t .Selen>um° ?IDL� Urban Runoff Mass-based WLAs are established for copper,nickel, and selenium in total recoverable forms. Mass-based WLAs are developed for mercury in suspended sediment. Interim limits are included to allow time for dischargers to put in place implementation measures necessary to achieve final waste load allocations. The daily maximum and monthly average interim limits are set equal to the 99th and 95`'percentile of available discharge data. I. Interim Limits and Final Waste Load Allocations for Total Recoverable Copper, Nickel, and Selenium Interim limits and waste load allocations are applied in receiving water. A. Interim Limits Cal tras and Con ' Creek Revlon Silo h Dry Daily Dry Monthly Wet Daily Dry Daily Dry Wet Daily Constituents Maximum Average Maximum Maximum ��e Maximum (ug►L) (ug1L) (ug/L) (UWL) (ug/L) copper 23 19 204 1 23 19 204 Nickel 15 1 13 a 15 13 a Selenium b 14 c 13 c a �.. (a) The current loads do not exceed the TMDL under wet conditions,interim limits are not required. (b) Selenium allocations have not been developed for this reach as it is not on the 303(4)list. implementation actions includes consideration of watershed-wide selenium impacts. (c) Attainment of interim limits will be evaluated in consideration of background loading data,if available. B.Final WLAs 1. Dry-Weather WLAs in Water Column (lbs/day) Flow Callegutas and Cone)o Creek Revllon Slough Range Low Flow Average Elevated Low Flow Average Elevated Flow Flow Flow Flow Copper" 0. 'WER .1 'W R 0 03 R 0.06'W R .02 0.02 2,9,?, -001 -0103 0.02 Nickel 1 0.100 0.120 0.440 0.050 0.069 0.116 Selenium a a) I (a) 0.004 1 0.003 0.004 • if site-specific WERs arc approved by the Regional Board.TMDL waste load allocations shall be implemented in accordance with the approved WERs using the equations set forth above. Regardless of the final WERs,total copper loading shall not exceed current loading. (a) Selenium allocations have not been developed for this reach as it is not on the 303(d)list. Implementation actions include consideration of the watershed-wide selenium impacts. .tune 8,2006 -7 - . ............ Attachment A to Resolution No. R4-2006-012 TMDL Element Calleguas CrW-7 rjhvd Metals and Selenium TMDL 2. Wet-Weather WLAs, in Water Column(lbs/day) Constituent Calleguas Crook - Revolon Slough Co pee (0,00054'QA2-0.032-Q-0.17)-WER-0.06 (0.0002-Q2+0.0005-Q)-WER Nickel" 0.014*QA2+0.82•Q 0.02rQA2+0.47•Q Selenium" (a) 0.527-QA2+0.47*Q • If site-specific WERs are approved by the Regional Board,TMDL waste load allocations shall be implemented in accordance with the approved WERs using the equations set forth above. Regardless of the final WERs,total copper loading shall not exceed current loading. Current loads do not exceed loading capacity during wet weather. Sum of all loads cannot exceed loads presented in the table (a) Selenium allocations have not been developed for this reach as it is not on the 303(d)list. Implementation actions include consideration of the watershed-wide selenium impacts. Q: Daily storm volume. II. Interim Limits and Final WLAs for Mercury in Suspended Sediment(lbs/yr) Final WLAs are set at 80%reduction from HSPF load estimates. Interim limits for mercury in suspended sediment are set equal to the highest annual load within each flow category,based on HSPF output for the years 1993-2003. Calleguas Crook Revlon Slough Flow Range Interim Final Interim Final (lb&fyr) (lbstyr) (lbatyr) (lbs/yr) 0-15,000 MGY 3.3 0.4 1.7 0.1 15.000-25,000 MGY 1 10.5 1.6 4 0.7 Above 25,000 MGY 1 64.6 9.3 10.2 1.8 MGY: million gallons per year. June 8, 2006 - 8 - Attachment A to Resolution No. R42006-012 `.r TMDL Element-".:;.-=._ Catleguas: k_1?i�a#ershed Metals and Selenium TMDL r Final WLAs for Other NPDES Dischargers I. Final WLAs for Total Recoverable Copper,Nickel,and Selenium mow Selenium Reach Dry Monthly Wet Daily Dry MattMy Wet Daily Dry Monthly Wel Daily Everaae Maximum Average Maximum Average Maximum (ugn-)° OWL)" (UWWP (ugfL)— (ug/L) (Ue'L) 1 V WER 5.8'WER B.2 74 b b 2 3.7*WER 5.8'WER 8.2 74 (b) (b) 3 27.0 27.4 149 859 ) 4 3.7'WER 5.8'WER 8.3 75 5 290 5 3.7"WER 5.8'WER 8.3 75 5 290 6 a) 31.0 a) 958 (b} (b 7 a 31.0 (a) 958 b 8 a 31.0 a 958 (b) ) 9 29.1 43.3 160 1296 b b) 10 29.1 43.3 160 1296 b 11 29.1 43.3 160 1296 b 12 29.1 43.3 160 1296 b 13 29.1 1 43.3 160 1296 b If site-specific WERs arc approved by the Regional Board,TM DL waste load allocations shall be implemented in accordance with the approved WERs using the equations set forth above. Regardless orthe final WERs,total copper loading shall not exceed current loading. In addition,effluent concentrations shall not exceed the performance standards of current treatment technologies - ** Concentration-based targets have been converted to total recoverable allocations using the CTR default translator of 0.96 for freshwater reaches and 0.83 for saltwater reaches. �..� *** Concentration-based targets have been converted to total recoverable allocations using the CTR deraull translator of 0.997 for freshwater reaches and 0.99 for saltwater teaches. (a) Discharges from these reaches do not reach lower Calleguas Creek and Mugu Lagoon during dry weather. Allocations arc not required for these reaches. (b) Selenium waste load allocations have not been developed for this reach as it is not on the 303(d)list. Implementation actions include consideration of the watershed-wide selenium impacts. II. Final WLAs for Mercury There is insufficient information to assign mass based WLAs to these sources. Therefore concentration-based waste loads allocations are set equal to 0.051 (ug/L) for other NPDES dischargers based on the CTR water column target for protection of human health from consumption organism only. Load Allocation Mass-based load allocations(LAs)for agriculture,and open space are developed for copper, nickel, and selenium in total recoverable forms. Open space represents background loads from ambient sources(i.e. natural soil concentrations, atmospheric deposition, and natural groundwater seepage) discharged from undeveloped open space,but not ambient sources that are discharged from developed land,such as agricultural and urban areas. LAs are developed for both wet and dry- weather. The dr�-weather LAs apply to days when flows in the stream are less than 86 percentile flow rate for each reach. The wet-weather LAs app] to days when flows in the stream exceed 86th percentile flow \r June 8,2006 -9 - Attachment A to Resolution No. 1142006-012 ...t,TMDL Elililiient wile as.Creeklwaterslax . a 11n TMDV rate for each reach. Annual mass loads of mercury in suspended sediment were developed according to low,medium,and high annual flow categories. A margin of safety of 15%was included in the LAS for copper and nickel. 1. Interims and Final Load Allocations for Total Recoverable Copper,Nickel,and Selenium * Interim limits are included to allow time for dischargers to put in place implementation measures necessary to achieve final load allocations. The daily maximum and monthly average interim limits are set equal to the 990'and 95h percentile of available discharge data. Interim limits and load allocations are applied in receiving water at the compliance points. A. Interim Limits Cal and Cone a Crook RevoIon Slouah Dry Daily Dry Wet Daily Dry Daily Dry Wet Daily Constituents Maximum Monthly Maximum Maximum Monttdy Maximum Average Average (UUIL) fuafl-) (Ugtw (UGLI (1191L) Copper 24 19 1390 24 19 1390 Nickel 1 43 1 42 1 (a) 43 42 (a) I ISelenium I (b) I (b) I (b) 1 6.7(c) 1 6(c) I (a) I (a) The current loads do not exceed the TMDL under wet conditions,interim limits are not required. (b) Selenium allocations have not been developed for this reach as it is not on the 303(d)Hst. Implementation actions includes consideration of watershed-wide seleniurn impacts. (c) Attainment of interim limits will be evaluated in consideration of background loading dam,If available. B.Final Load Allocation 1. Dry Weather LAs in Water Column (lbs/day) Calleguas Creek Revolon Slough Constituent Low Flow Average Elevated Low Average Elevated Flow Flow Flow I Flow Flow Agriculture 0.07• WER-0.121 WER-0.31'WER 0.07*WER 0.14*WER- 0.351WER- Copper- 0.03 0.02 0.05 0.03 0.07 0.07 Open Space 0.150 0.080 0.130 0.050 0,120 1 0.110 Nickel Agriculture 0.420 0.260 0.970 0,390 0.690 1.600 . Open Space 0.450 0.420 0.560 0.010 0.020 - 6-.-020 Selonkirn I Agriculture (a) (a) (a) 0.008 0.007 0.018 EO—E—�-Space (a) (a) (a) 0.180 0.310 0.490 If site-specific WER&are approved by the Regional Board,TMI)L load allocabons shall be implemented in accordance with the approved WERs using the equations set forth above. (a) Selenium allocations have not been developed for this reach as it is not on the 303(d)list. Implementation actions include consideration of the watershed-wide selenium impacts. June 8, 2005 - 10- Attachment A to Resolution No. R42006-012 �.�. TNWE L Element... CaUeguas:.C-ir enhed Metals and 2. Wet Weather LAs in Water Column lbs/da Constitueni Calleguas Creek Revolon Slough (0.00017`0"2'0.01.0- (0.00123"QA2+0.0034"Q)" Copper* Agriculture 0.05)"WB2-0.02 WER Open Space 0.0000537"Q"2+0.00321"Q 0.0000432"Q"2+0.000765"0 Mckel" Agriculture 0.014"Q"2+0.82•Q 0.027"QA2+0.47"0 Open Space 0.014"QA2+4.82"Q 0.027"QA2+0.47"0 Selenium" Agriculture (a) 0.110"2+1.8'0 Open Space (a) 0.027"QA2+0.47'0 • If site-specific W ERs are approved by the Regional Board,TMDL load allocations shall be implemented in accordance with the approved WERs using the equations set forth above. •• Current loads do not exceed loading capacity during wet weather. Sum of all loads cannot exceed loads presented in the tablc (a) Selenium allocations have not been developed for this reach as it is not on the 303(d)list Implementation actions include consideration of the watershed-wide selenium impacts. Q Daily storm volume H. Interim and Final LAs for Mercury in Suspended Sediment (lbs/yr) Final LAs are set at 80%reduction from HSPF load estimates. Interim limits for mercury in suspended sediment are set equal to the highest annual load within each flow category,based on HSPF output for the years 1993-2003 Calleguas Creek Revolon Slough \.,. Flow Range Agriculture Open Space Agricu lture Open Space Interim Final Interim Final Interim Final Interim Final 0-15,000 MGY' 3.9 0.5 5,5 0.7 2 0.2 2.9 0.2 13,000-25,000 MGY 12.6 1.9 17.6 2.7 4.6 0.8 6.7 1.1 Above 25,000 MGY 77.5 11.2 108.4 17.93 12.2 2.2 17.1 j 2 MGY:million gallons per year. Margin of Safety A margin of safety(MOS) for the TMDL is designed to address any uncertainty in the analysis that could result in targets not being achieved in the water bodies. Both implicit and explicit MOS are included for this TMDL. The implicit MOS stems from the use of conservative assumptions made during development of multiple numeric targets to ensure sufficient protection under all conditions and conservative methods employed in developing the TMDL. Background loads are assigned to the TMDL and assumed to remain constant throughout implementation of the TMDL. This results in higher required reductions for the other sources. Calculation of allocations is based on never exceeding numeric target concentrations rather than the once in three years exceedance referenced in the CTR. Calculations of current loads and loading capacity for Mugu Lagoon are based on the combined discharges from Calleguas Creek and Revolon Slough(without any r^ dilution rovided by tidal flushing),which over predicts actual June 8,2006 Attachment A to Resolution No.R4-2006-012 TADL Element `::::...,CaReguas Creek'l d'Metals and Se iM .. concentrations in the Lagoon. A 15%explicit MOS is also included for copper and nickel to account for the uncertainty resulting from the calculation of the allowable load based-on the median flow rate and translator of each flow category. The 15% explicit MOS is determined sufficient to address the elevated flow category,but still account for the more conservative nature of low and average category. Future Growth Ventura County accounts for slightly more than 2%of the state's residents with a population of 753,197 (US Census Bureau,2000). GIS analysis of the 2000 census data yields a population estimate of 334,000 for the CCW, which equals about 44%of the county population. According to the Southern California Association of Governments (SCAG), growth in Ventura County averaged about 51%per decade from 1900-2000;with growth exceeding 70% in the 1920s, 1950s, and 1960s. Significant population growth is expected to occur within and near present city limits until at least 2020. Future growth may initially increase loadings as construction activities expose bare soil and increase erosion-related discharges to receiving water. However,once development has been completed the presence of impermeable land surface and landscaped areas may reduce the amount of natural soils that are eroded and carried to the stream. For copper, future growth could increase loadings from urban areas and POTWs due to increased �►' traffic (i.e., brake pad residues), architectural copper use and corrosion of copper pipes. Selenium loading may increase if increase irrigation raises the groundwater table and increases high selenium groundwater seepage to surface waters. However, if increased growth results in increased water demand and high selenium groundwater is pumped and treated to supply this demand,the selenium could decrease. Seasonal Seasonal variations are addressed for copper, nickel, and selenium by Variations and developing separate allocation for wet and dry weather. Critical Critical conditions for copper,nickel, and selenium are developed using model Conditions results to calculate the maximum observed 4-day average dry weather concentration and the associated flow condition. Wet weather,as a whole, is defined as a critical condition. For mercury,there is no indication that mercury contamination in Mugu Lagoon is consistently exacerbated at any particular time of the year. Since the potential effects of mercury are related to bioaccumulation in the food chain over long period time,any other short term variations in concentration which might occur are not likely to cause significant impacts upon beneficial uses. Therefore,seasonal variations do not affect critical conditions for Calleguas Creek watershed mercury TMDL. June 8,2006 - 12- Attachment A to Resolution No. R4-2006-012 --,T W- L Element Calleguas Creek W- atershed'Mi Special Studies Special Studies and Monitoring Plan Several special studies are planned to improve understanding of key aspects related to achievement of WLAs and LAs for the Metals and Selenium TMDL 1.Special Study#1 (Optional)—Evaluation and Initiation of Natural Sources Exclusion The TMDL technical report has identified ambient sources as the primary significant selenium and mercury loadings in the watershed and as potentially significant sources of copper and nickel. The portion of all ambient sources associated with open space runoff and natural groundwater seepage is accounted for in this TMDL as"background load." This special study will evaluate whether or not background loads for each constituent qualify for natural source exclusion. This study will also consider whether or not any portion of the ambient source contribution for agricultural or urban runoff loads qualify for natural source exclusions and/or provide a basis for site specific objectives. The presence of natural sources makes achievement of selenium and mercury targets during all conditions unlikely. For copper, achievement of the CTR targets or the WER based targets (if approved) in Revolon 1'� Slough may not be feasible due to the magnitude of background loads. Completion of site specific objectives and/or a use attainability analysis shall be required to review any potential change to water quality objectives for these constituents. This special study will be used to develop the necessary information to revise the water quality objectives for selenium and mercury and possibly for copper and nickel. 2.Special Study#2 —Identification of selenium contaminated Groundwater Sources The purpose of this special study will be to identify groundwater with high concentrations of selenium that is either being discharged directly to the stream or used as irrigation water. The investigation will focus on areas where groundwater has a high probability of reaching the stream and identify practical actions to reduce the discharge of the groundwater to the stream. The analysis will include an assessment of the availability of alternative water supplies for irrigation water,the costs of the alternative water supplies and the costs of reducing groundwater discharges. June 8,2006 - 13 - Attachment A to Resolution No.R4-2006-012 `,.. INWL Element Cadleguas Creek-rshed Metals and - 3.Special Study#3—In vestigation of Sod Concentrations and Identification of"Hot Spots" The purpose of this special study will be to identify terrestrial areas with high concentrations of metals and/or selenium, either due to anthropogenic sources or resulting from high natural concentrations in soils. Use of detailed soil maps for the watershed in combination with field survey and soil sampling may lead to identification of areas important for reducing overall loads reaching the stream. Identification of any areas with elevated soil concentrations of metals and/or selenium would create an opportunity for efficient and targeted implementation actions, such as remediation or erosion control. 4.Special Study#4(Optional)—Determination of Water E}j`ect Ratio for Copper in Revolon Slough The purpose of this optional special study would be to calculate a WER for copper that is specific to Revolon Slough. A WER was not previously developed for Revolon Slough because it was not listed for copper. Subsequent monitoring demonstrated that the saltwater copper CTR criterion was exceeded in the Revolon Slough. This Study would parallel the developed WER for Mugu Lagoon and Calleguas Creek. This is an optional special study to be conducted if desired by the stakeholders or determined necessary by the Executive Officer. S.Special Study#S(Optional)—Determination of Site-Specific Objectives for Mercury and Selenium Special Study#1 will evaluate whether a natural source exclusion is appropriate for background loads of mercury and selenium or any portion of the ambient source contributions to non-background loads in the Calleguas Creek watershed. This special study will develop any SSOs deemed necessary to account for the background conditions and/or site-specific impacts of mercury and selenium(and possibly for copper and nickel)on wildlife and humans in the watershed. This is an optional special study to be conducted if desired by the stakeholders or determined necessary for establishing a natural source exclusion. Monitorine Plan The Calleguas Creek Watershed TMDL Monitoring Plan(CCWTMP) is designed to monitor and evaluate the implementation of this TMDL and refine the understanding of metal and selenium loads. CCWTMP is intended to parallel efforts of the Calle Creek Watershed Nutrients Junc 8, 2006. - 14- Attachment A to Resolution No.R4-2006-012 4ML Eleven Calleguas Creek'i O- metals xnd.Selenft�nm='�1G ::�: t r TMDL, Toxicity TMDL,and OC Pesticide,PCBs, and Sediment TMDL monitoring programs. The proposed CCWTMP shall be made available for public review before approval by the Executive Officer. The goals of the CCWTMP include: (1)to determine compliance with copper,mercury,nickel, and selenium numeric targets at receiving water monitoring stations and at POTWs discharges; (2)to determine compliance with waste load and load allocations for copper,mercury, nickel, and selenium at receiving water monitoring stations and at POTWs discharges; (3)to monitor the effect of implementation action by urban, POTW, and agricultural dischargers on in-stream water quality; and (4)to implement the CCWTMP in a manner consistent with other TMDL implementation plans and regulatory actions within the Calleguas Creek watershed. Monitoring conducted through the Conditional Waiver Program may meet part of the needs of the CCWTMP. To the extent monitoring required by the Metals and Selenium TMDL Implementation Plan parallels monitoring required by the Conditional Waiver Program, it shall be coordinated with the Conditional Waiver Program monitoring conducted by individuals and groups subject to the term and conditions of the Conditional Waiver. Monitoring will begin within one year of the effective date of the TMDL. In-stream water column samples will be collected monthly for analysis of general water quality constituents(GWQC), copper, mercury, nickel, selenium, and zinc for the first year. After the first year,the Executive Officer will review the monitoring report and revise the monitoring frequency as appropriate. In-stream water column samples will be generally be collected at the base of Revolon Slough and Calleguas Creek, and in Mugu Lagoon(collection of flow-based samples will occur above the tidal prism). Additionally,sediment samples will be collected semi-annually in Mugu Lagoon and analyzed for sediment toxicity resulting from copper,mercury,nickel,selenium, and zinc. At such a time as numeric targets are consistently met at these points, an additional site or sites will be considered for monitoring to ensure numeric targets are met throughout the lower watershed. Additional samples will be collected concurrently at representative agricultural and urban runoff land use stations as well as at POTWs in each of the subwatersheds and analyzed for GWQCs, copper, mercury, nickel, selenium,and zinc. The location of the land use stations will be determined before initiation of the CCWTMP. Environmentally relevant detection limits will be used for metals and selenium (i.e. detection limits lower than applicable target), if available at a June 8, 2006 Attachment A to Resolution No.R4-2006-012 �. TMDL Element Calleguas Ceee14 shed Metals and Selenium TMDL commercial laboratory. Compliance sam pling station locations: . Subwatershed Station ID I Station Location Contituent Water Column:Cu,NJ,Hg,Se,Zn Mugu Lagoon 01-11-BR 11th Street Bridge Bird Egg:Hy,Se Fish Tisue:Hg,Se Sediment Cu,NI,Hg,Se,Zn Revolon Slough 04-WOOD Revolon Slough East Water Column:Cu Ni Hg,Se,Zn Side of Wood Road Fish Tisue:14g,Se 03-CAMAR Calleguas Creek at Water Column:Cu,Ni,Hg,Se,Zn University Drive Calleguas Creek 03D-CAMR Camrosa Water Water Column:Cu,Ni,Hg,Se,Zn Reclamation Plant 9AD-CAMA Camarillo Water Water Column:Cu,Ni,Hg,Se,Zn Reclamation Plant H81 Canyon Conejo Creek 10D-HILL Wastewater Treatment Water Column:Cu,Ni.Hg,Se,Zn Plant Implementation The final WLAs will be included for permitted stormwater discharges, Plan POTWs, and other NPDES discharges in accordance with the compliance schedules provided in Table 7-19.2. The Regional Board may revise these WLAs based on additional information developed through special studies and/or monitoring conducted as part of this TMDL. In addition,the implementation schedule was developed with the assumption that a WER for copper and a SSO for nickel will proceed following the TMDL. Should adoption and approvals of the WER and SSO not proceed, additional implementation actions could be required. The implementation plan includes discussion of implementation actions to address these conditions. WLAs established for the three major POTWs in this TMDL will be implemented through'NPDES permit limits. Compliance will be determined through monitoring of final effluent discharge as defined in the NPDES permit. The Hill Canyon and Camarillo WRPs are working towards discontinuing the discharge of effluent to Conejo Creek. If this plan is implemented,the POTW allocations for the watershed will be achieved by reduction of effluent discharges to the stream. The implementation plan includes sufficient time for this plan to be implemented. However,if this plan is altered,the POTWs will need to meet allocations through other method such as source control activities. The Regional Board will need to ensure that permit conditions are consistent with the assumptions of the WLAs. Should federal,state, or regional guidance or practice for implementing WLAs into permits be revised,the Regional Board may reevaluate the TMDL to incorporate such guidance. June 8,2006 - 16- Attachment A to Resolution No. R4-2006-012 TEL Element Calleguss.Creek.WaterAketiIV dWs and SeledlniidrTAW I..:....,_; In accordance with current practice, a group concentration-based WLA has been developed for all permitted stormwater discharges, including municipal separate storm sewer systems(MS4s),Caltrans, general industrial and construction stormwater permits,and Naval Air Weapons Station Point Mugu. MS4 WLAs will be incorporated into the NPDES permit as receiving water limits measured in-stream at the base of Revolon Slough and Calleguas Creek, and in Mugu Lagoon and will be achieved through the implementation of BMPs as outlined in the implementation plan.The Regional Board will need to ensure that permit conditions are consistent with the assumptions of the WLAs. If BMPs are to be used,the Regional Board will need to detail its findings and conclusions supporting the use of BMPs in the NPDES permit fact sheets. Should federal, state,or regional guidance or practice for implementing WLAs into permits be revised, the Regional Board may reevaluated the TMDL to incorporate such guidance. The Regional Board may revise these WLAs based on the collection of additional information developed through special studies and/or monitoring conducted as part of this TMDL. LAs will be implemented through the State's Nonpoint Source Pollution Control Program(NPSPCP)and Conditional Waiver for Discharges from Irrigated Lands adopted by the Los Angeles Regional Water �`"' Quality Control Board on November 3,2005.Compliance with LAs will be measured in-stream at the base of Revolon Slough and Calleguas Creek and in Mugu Lagoon and will be achieved through the implementation of BMPs consistent with the NPSPCP and the Conditional Waiver Program. The Conditional Waiver Program requires the development of an agricultural water quality management plan(AWQMP)to address pollutants that are exceeding receiving water quality objectives as a result of agricultural discharges. Therefore, implementation of the load allocations will be through the development of an AWQMP for metals and selenium. Implementation of the load allocations will also include the coordination of BMPs being implemented under other required programs to ensure metal discharges are considered in the implementation. Additionally, agricultural dischargers will participate in educational seminars on the implementation of BMPs as required under the Conditional Program. Studies are currently being conducted to assess the extent of BMP implementation and provide information on the effectiveness of BMPs for agriculture. This information will be integrated into the AWQMP that will guide the implementation of agricultural BMPs in the Calleguas Creek watershed. After implementation of these actions, compliance with the allocations and TMDL will be evaluated and the allocations reconsidered if necessary June 8,2006 - 17 - Attachment A to Resolution No. R4-2006-012 -,� TMDL Element Calleguas Creek Wateit tals.and- Ir based on the special studies and monitoring plan section of the implementation plan Agricultural and urban dischargers will have a required 25%, 50%and 100%reduction in the difference between the current loadings and the load allocations at 5, 10 and 15 years after the effective date, respectively. Achievement of required reductions will be evaluated based on progress towards BMP implementation as outlined in the UWQMPs,AWQMP,Conditional Waiver for Irrigated Lands,and in consideration of background loading information, if available. If the interim reductions are not met,the dischargers will submit a report to the Executive Officer detailing why the reductions were not met and the steps that will be taken to meet the required reductions. As shown in Table 7-19.2,implementation of LAs will be conducted over a period of time to allow for implementation of the BMPs, as well as coordination with special studies and implementation actions resulting from other TMDL Implementation Plans(Nutrient,Historic Pesticides and PCBs, Sediment,Metals,Bacteria,etc.).The Regional Board may revise the LAs based on the collection of additional information developed through special studies and/or monitoring conducted as part of this TMDL. June 8,2006 - 18 - Attachment A to Resolution No.R4-2006-012 Table 7-19.2 Calleguas Creek Watershed Metals and Selenium TMDL: Im lementation Schedule �itip .gtptlon Action` POTWs,Permitted Effective date of interim Metals and Selenium Stormwater Effective date of the 1 TMDL waste load allocation(WLAs),and final Dischargers 2 amendment WLAs for other NPDES permittees (PSD),Other NPDES Permittees 2 Effective date of interim Metals and Selenium Agricultural Effective date of the TMDL load allocation(LAs) Dischargers amendment Submit Calleguas Creek Watershed Metals and POTWs,PSD, Within 3 months after the 3a Selenium Monitoring Program Agricultural effective date of the Dischargers amendment POTWs,PSD, Within 3 months of Agricultural Implement Calleguas Creek Watershed Metals and Executive Officer 3b Selenium Monitoring Program approval of the Dischargers monitorinR program Re-calibrate HSPF water quality model based on POTWs,PSD, 1 year after submittal of 3c first year of monitoring data Agricultural first annual monitoring Dischargers report Conduct a source control study,develop and submit Within 2 years after the an Urban Water Quality Management Program 4a (UWQMP)for copper,mercury,nickel,and MS4s effective date of the amendment selenium Conduct a source control study,develop and submit Within 2 years after the 4b an UWQMP for copper,mercury,nickel,and Caltrans effective date of the selenium amendment Conduct a source control study,develop and submit Within 2 years after the US N 4c an UWQMP for copper,mercury,nickel,and ( point Mugu effective date of the selenium (US Navy} amendment Within 1 year of approval 5 Implement UWQMP PSD of UWQMP by the Executive Officer Develop and submit an Agricultural Water Quality Agricultural Within 2 years after the 6 Management Program(AWQMP)as described in Dischargers effective date of the the Conditional Waiver Program amendment Agricultural Witten 1 year of approval 7 implement AWQMP Dischargers of AWQMP by the Executive Officer Develop WLAs and LAs for zinc if impairment for Regional Board or Within 1 year of the final 8 Mugu Lagoon is maintained on the final 2006 USEPA 2006 303(d)list 303(d)list Submit progress report on salinity management Within 3 years after the 9 plan,including status of reducing WRP effluent POTWs, effective date of the discharges to Conejo and Calleguas Creek reaches of the watershed amendment 10 If progress report identifies the effluent discharges POTWs Within 4 years after the reduction is not progressing,develop and effective date of the 'The Regional Board regulatory programs addressing all discharges in effect at the time this implementation task is due may contain requirements substantially similar to the requirements of these implementation tasks_if such requirements are in place in another regulatory program including other TMDLs,the F,xecutive Officer may revise or eliminate this implementation task to coordinate this TMDL implementation plan with other regulatory programs. 2 Permitted Stormwatex Dischargers(PSD)include MS4s,Caltrans,the Naval Air Weapons Station at Point Mugu,and general iodustrial and construction permitim. June 8, 2006 - 19- Attachment A to Resolution No. R42006-012 �.., Item _ In _ u►a Acflon'.. _ m't3� Completion implement source control activities for copper, amendment mercury.nickel,and selenium Within 5 years after the 11 Re-evaluation of POTW interim waste load POTWs effective date of the allocations for copper,mercury,and nickel amendment Evaluate the results of the OCs TMDL,Special 12a Study—Calculation of sediment transport rates in Agricultural Within 6 months of the Calleguas Creek watershed for applicability to Dischargers,PSD completion of the study the metals and selenium TMDL Include monitoring for copper,mercury,nickel,and Within 2 years after the 12b selenium in the OC pesticides TMDL,special Agricultural effective date of the Study—Monitoring of sediment by source and land Dischargers,PSD amendment use type Expand scope of the OC Pesticide TMDL,Special If necessary,prior to end 12c Study—Examination of food webs and Interested parties of the implementation accumulation in the Calleguas Creek watershed to period ensure prote ction of wildlife to include mercury Evaluate the results of the OC Pesticides TMDL, 12d Special Study—Effects of BMPs on Sediment and Agricultural Within 6 months of Siltation to determine the impacts on metals and Dischargers,PSD completion of the study selenium Submit work plan for Special Study#1 (Optional)— Agricultural Within 1 year after the 13a Identification of Natural Sources Exclusion Dischargers,PSD effective date of the amendment Submit results of Special Study#1 (Optional)— Agricultural Within 3 years workplan lob Identification of Natural Sources Exclusion Dischargers,PSD approval of fficer by Executive Officer Submit work plan for Special Study#2 — POTWs,PSD,and Within 1 year after the 14a Identification of selenium Contaminated Agricultural effective date of the Groundwater Sources Dischargers amendment Submit results of Special Study#2 —Identification POTWs,PSD,and Within 1 year of approval l4b of selenium Contaminated Groundwater Sources Agricultural of workplan by Executive Dischargers Officer Submit work plan for Special Study#3 — PSD and Within 1 year after the 15a Investigation of Metals'"Hot Spot"and Natural Agricultural effective date of the soil Discharger amendment Submit results of Special Study#3 —Investigation PSD and Within 2 years of 15b of metals'"Hot Spot"and Natural Soil Agricultural approval of workplan by Discharger Executive Officer Special Study 94(Optional)—Determination of PSD and If necessary,prior to end 16 WER for copper in Revolon Slough Agricultural of the implementation Dischargers period Special Study#5(Optional)—Determination of Site PSD and If necessary,prior to end 17 Specific Objective for Mercury and Selenium Agricultural of the implementation Dischargers period Evaluate cfI'ectiveness of BMPs implemented under PSD and 6 years after the effective 18 the AWQMP and LJWQMP in controlling metals Agricultural date of the amendment and selenium discharges Dischargers Evaluate the results of implementation actions 14 POTWs,PSD,and Within I year after the 14 and 15(Special Study#2&#3)and implement Agricultural completion of the studies actions identified by the studies Dischargers 20 If needed,implement additional BMPs or revise Agricultural 7 years after the effective r existing BMPs to address any issues not covered by Dischargers I date of the amendment June 8, 2006 -20 - Attachment A to Resolution No.R42006-012 _ ..�— ........ - - . on Action. i DIte = In � �q_t af implementation efforts of related Calleguas Creek watershed TMDLs(Nutrients,Toxicity,OC Pesticides,PCBs,and Siltation)and the Conditional Waiver Program 21 Consider nickel SSO proposed by stakeholders Regional Board 1 years after the effective date of the amendment Publicly notice tentative copper water effects ratio Within 2 months of 22 for Regional Board consideration,if deemed Regional Board receipt of peer review appropriate based on peer review Staff conmtents Based on the result from items 1-23,Regional 2 years from submittal of 23 Board will consider re-evaluation of the TMDLs, Regional Board information necessary for WLAs,and I.As if necessary re-evaluation POTWs will be required to reduce loadings by 8,and 10 years after the 24 50%,and 100%of the difference between the POTWs effective date of the current loading and the WLAs at 8,and 10 years amendment after the effective date,respectively. Re-evaluation of Agricultural and Urban load and waste load allocations for copper,mercury,nickel, and selenium based on the evaluation of BMP 5, 10,and 15 years after 25 effectiveness. Agricultural and urban dischargers Agricultural and the effective date of the will have a required 25%,50 1/o,and 100% Urban Dischargers amendment reduction in the difference between the current loadings and the load allocations at 5, 10,and 15 ears after the effective date,respectively. Stakeholders and Regional Board staff will provide information items to the Regional Board,including: 2 years after the effective 26 progress toward meeting TMDL load reductions, Regional Board date,and every 2 years water quality data,and a summary of following implementation activities completed to date Achievement of Final WLAs and attainment of Within 10 years after the 27 water quality standards for copper,mercury,nickel, POTWs effective date of the and selenium amendment Achievement of Final WLAs and LAs and Within 15 years after the Agricultural 28 attainment of water quality standards for copper, Dischargers,PSD effective date of the nickel,mercury and selenium g amendment 3 Date of achievement of WLAs and LAs based on the estimated timeframe for educational programs,special studies,and ►• implementation of apprupriate HMPs and associated monitoring. The Conditional Waiver Program will set timeframes for the BMP managcmcnt plans. June 8,2006 - 21 - Exhibit E Quality Assurance Project Plan (QAPP) Draft Calleguas Creek Watershed Management Plan Quality Assurance Project Plan (QAPP) Monitoring and Reporting Program Plan for Nitrogen, OC, and PCBs, Toxicity, and Metals,and Selenium Total Maximum Daily Loads Exhibit E May 30, 2008 Revision 2 DRAFT Calleguas Creek Watershed Management Plan Quality Assurance Project Plan (QAPP) Monitoring and Reporting Program Plan for the Nitrogen , OC and PCBs, Toxicity, and Metals and Selenium Total Maximum Daily Loads submitted to Los Angeles Regional Water Quality Control Board prepared by LARRY WALKER ASSOCIATES on behalf of the CALLEGUAS CREEK WATERSHED MANAGEMENT PLAN WATER QUALITY[WATER RESOURCES SUBCOMMITTEE A. PROJECT MANAGEMENT 1. Title and Approval Sheets Calleguas Creek Watershed Management Plan Quality Assurance Project Plan (QAPP) Total Maximum Daily Load Monitoring and Reporting Program Plan for the Nitrogen, OC and PCBs, Toxicity, and Metals and Selenium TMDLs Regional Board Point of Contact Don Kendall, Chair Calleguas Creek Watershed Water Date Resources/Quality Subcommittee Fiscal Agent/ Program To be determined Date Manager T Project Manager To be determined Date Project QA Manager To be determined Date Lab QA Officer Jeff Cotsifas, Pacific EcoRisk(Toxicity Lab) Date Lab QA Officer Rich Gossett, CRG Marine Laboratories Date LARWQCB Project Manager Thanhloan Nguyen Date LARWQCB QA Officer Yanjie Chu Date r 2. Table of Contents A. PROJECT MANAGEMENT 2 1. Title and Approval Sheets.......................................................................2 2. Table of Contents ..................:................................................................1 3. Distribution List.......................................................................................3 4. Project Organization ...............................................................................4 5. Problem Definition/Background ..............................................................7 6. Project Description ...............................................................................10 7. Quality Objectives and Criteria for Measurement Data.........................15 8. Training and Certification......................................................................17 9. Documents and Records................:.....................................................17 B. DATA GENERATION AND ACQUISITION 18 10. Sampling Process Design.....................................................................19 11. Sampling Methods................................................................................38 12. Sample Handling and Custody .............................................................45 13. Analytical Methods ...............................................................................49 14. Quality Control......................................................................................60 15. Instrument/Equipment Testing, Inspection and Maintenance...............65 16. Instrument/Equipment Calibration and Frequency................................66 17. Inspection/Acceptance of Supplies and Consumables.........................69 18. Non-Direct Measurements....................................................................69 19. Data Management................................................................................69 C. ASSESSMENT AND OVERSIGHT 70 20. Assessments and Response Actions ...................................................70 21. Reports to Management.......................................................................71 D. DATA VALIDATION AND USABILITY 73 22. Data Review, Verification and Validation Requirements.......................73 23. Data Verification ...................................................................................73 24. Data Validation .....................................................................................73 E. AMENDMENTS TO QAPP 74 F. REFERENCES 75 CCWTMP QAPP 1 May 30,2008 Revision 2 TABLES Table 1. Description of CCW Reaches Based on 2002 303(d) List.................................................. 9 Table 2. Constituents and Monitoring Frequency for CCWTMP (varies by site) .............................12 Table 3. Optional Constituents and Monitoring Frequency for CCWTMP(varies by site)...............13 Table 4. Year 1 Project Deliverable Schedule for CCWTMP...........................................................15 Table 5. Data Quality Objectives.....................................................................................................16 Table 6. CCWTMP Compliance Monitoring and Nutrient Investigation Sites and Annual Sampling Frequency...............................................................................................................25 Table 7. Toxicity Investigation Monitoring Sites and Sampling Frequency..............................:.......27 Table 8. CCWTMP Land Use Monitoring Sites and Sample Frequency.........................................28 Table 9. Compliance, Toxicity, and Nutrient Investigation Monitoring Schedules'..........................37 Table 10. Sample Collection Requirements of Monitoring Programs in the CCW...........................40 Table 11. Sample Container, Volume, Initial Preservation, and Holding Time Requirements.........47 Table 12.Analytical Methods and Project Reporting Limits for Field Measurements......................50 Table 13.Analytical Methods and Project Method Detection and Reporting Limits for Laboratory Analysis..................................................................................................................51 Table 14. Quality Control Requirements.........................................................................................61 Table 15. Required Data Completeness.........................................................................................63 Table 16. Calibration of Field Measurement Equipment.................................................................67 Table 17. Reports to Management Schedule..................................................................................71 FIGURES Figure 1. Calleguas Creek Watershed TMDL Monitoring Program Management Structure............. 6 Figure 2. Calleguas Creek Watershed............................................................................................. 8 Figure 3. CCWTMP Compliance Monitoring Sampling Sites—Receiving Water............................29 Figure 4. Compliance Monitoring Receiving Water Sampling Sites—Freshwater Sediment...........30 Figure 5. Compliance Monitoring Receiving Water Sampling Sites—Freshwater Fish Tissue .......31 Figure 6. Compliance Monitoring Sampling Sites—POTW Effluent................................................32 Figure 7. Compliance Monitoring Sampling Zones—Mugu Lagoon Sediment................................33 Figure 8. Compliance Monitoring Sampling Zones—Mugu Lagoon Tissue ....................................34 Figure 9.Toxicity Investigation Receiving Water Sampling Sites—Water and Sediment...............35 Figure 10. Land Use Sampling Sites...............................................................................................36 Figure 11. Example Field Measurement Equipment Calibration Log Sheet....................................68 Figure 12. Example Field Measurement Equipment Calibration Verification Log Sheet..................68 APPENDICES Appendix A: Sampling Site Descriptions Appendix B: Basin Plan Amendments Appendix C: Supporting Documents for Field Procedures Appendix D: Supporting Documents for Toxicity Testing and Benthic Infuana Assessment Appendix E: Supporting Documents for Chemical Analysis Appendix F: Example Field Log Sheet and Chain-of-Custody Form Appendix G: Calculations for Data Quality Assessments Appendix H: Chapter 13 QA/QC Data Evaluation from Caltrans Guidance Manual: Stormwater Monitoring Protocols, 2nd Edition Appendix I:April 24, 2007 Comment Letter from the Los Angeles Regional Water Quality Control CW Board and Response to Comments CCWTMP QAPP 2 May 30,2008 Revision 2 �... 3. Distribution List Name Agency Contact E-mail Number Sam Unger Los Angeles Regional Water Quality 213-576-6622 sunger @waterboards.ca.gov Control Board Thanhloan Los Angeles Regional Water Quality 213-576-6690 tnguyen @waterboards.ca.gov Nguyen Control Board Yanjie Chu Los Angeles Regional Water Quality 213-576-6681 ychu @waterboards.ca.gov Control Board Don Kendall Chair, Calleguas Creek Water 805-526-9323 DKendall @calleguas.com Resources/Quality Subcommittee To be determined Fiscal Agent/Contract Manager To be determined City of Camarillo To be determined City of Moorpark To be determined City of Oxnard To be determined City of Simi Valley To be determined City of Thousand Oaks To be determined County of Ventura To be determined Ventura County Waterworks District No. 1 To be determined Camrosa Water District To be determined Camarillo Sanitary District ..�. To be determined U.S. Dept.of Navy To be determined California Department of Transportation To be determined Ventura County Agricultural Irrigated Lands Group within the Calleguas Creek Watershed, a subdivision of the Farm Bureau of Ventura County To be determined Project Manager To be determined Project Quality Assurance Manager Jeff Cotsifas Toxicity Lab—Pacific EcoRisk (925) 313- cotsifas @pacificecorisk.com 8080 Rich Gossett Analytical Lab—CRG Marine (310) 533- crglabs @sbcglobal.net Laboratory 5190 CCWTMP QAPP 3 May 30,2008 Revision 2 �- 4. Project Organization The Basin Plan Amendments(BPA)for each Total Maximum Daily Load(TMDL) in the Calleguas Creek watershed (CCW) identifies individual responsible parties. Implementation Plans outlined in the BPAs for the following four adopted TMDLs for the CCW require the development and implementation of monitoring programs: • Nitrogen Compounds and Related Effects in Calleguas Creek (Nitrogen TMDL) • Organochlorine(OC) Pesticides, Polychlorinated Biphenyls(PCBs)and Siltation in Calleguas.Creek, its Tributaries, and Mugu Lagoon (OCs TMDL) • Toxicity, Chlorpyrifos, and Diazinon in the Calleguas Creek, its Tributaries and Mugu Lagoon (Toxicity TMDL) • Metals and Selenium in Calleguas Creek, Its Tributaries, and Mugu Lagoon (Metals TMDL) The QAPP is intended to allow for the inclusion of additional monitoring requirements identified in as yet to be adopted TMDLs (e.g., bacteria). The CCW TMDL Monitoring Program (CCWTMP) is a coordinated effort with the various stakeholders that make up the Calleguas Creek Watershed Management Plan (CCWMP)and the Water Quality/Water Resources Subcommittee. Responsible parties identified in the TMDL have developed a Memorandum of Agreement(MOA) that outlines an agreement to implement the CCWTMP QAPP. The responsible parties identified in the organizational structure illustrated in Figure 1 have formally joined together to fulfill their monitoring requirements as outlined in the BPAs. The CCWTMP QAPP is intended to fulfill the TMDL monitoring requirements for only those parties which are part of the MOA or otherwise identified by the participants of the MOA. Monitoring efforts will be coordinated by the parties to the MOA grouped as follows: • POTWs: consisting of Camrosa Water District, Camarillo Sanitary District, Ventura County Waterworks District No. 1, and the Cities of Simi Valley and Thousand Oaks; • Urban Dischargers: consisting of the Cities of Simi Valley, Thousand Oaks, Camarillo, Moorpark and Oxnard and the County of Ventura Public Works Agency; • Agricultural Dischargers: consisting the entities represented by the Ventura County Agricultural Irrigated Lands Group within the Calleguas Creek Watershed,a subdivision of the Farm Bureau of Ventura County; and • Other Dischargers: consisting of the U.S. Department of Navy and Caltrans. Per the MOA, a Management Committee consisting of one representative each from the POTWs, Urban Dischargers and Other Dischargers groups and two representatives from the Agricultural Dischargers group will oversee the CCWTMP and make decisions to assure the CCWTMP is carried out in a timely, accountable fashion. Management Committee, contract and laboratory staff will have the following roles: • Fiscal Agent/Contract Manager: To be determined. The Fiscal Agent/Contract Manager will contract with the selected Contractors to implement the CCWTMP consisting of monitoring, laboratory services, data management and reporting and act as the liaison between the Management Committee and Contractors. CCWTMP QAPP 4 May 30,2008 Revision 2 • Project Manager: To be determined. The Project Manager will be a Contractor responsible with overseeing the day to day activities of implementing the CCWTMP QAPP and report directly to the Fiscal Agent/Contract Manager. • Project Quality Assurance Manager: To be determined. The Project Quality Assurance Manager will conduct quality assurance oversight for the project independently from project management and from the projects monitoring program. • Laboratory Quality Assurance Officer, Toxicity Testing: Jeff Cotsifas(Pacific EcoRisk) • Laboratory Quality Assurance Officer, Chemistry: Rich Gossett(CRG Marine Laboratory) • Sample Collection: To be determined. The Project Manager will be responsible for updating the QAPP, as necessary, and ensure sufficient review is conducted and signatures are obtained. The various Elements(or sections)of the QAPP describe the quality assurance requirements for the CCWTMP developed to comply with the requirements of the aforementioned BPAs. All contractors selected to perform the sampling and laboratory analyses must meet the quality control criteria necessary to satisfy the data quality objectives of this program, including those for precision, accuracy,detection and reporting. This QAPP is based on the State's Surface Water Ambient Monitoring Program (SWAMP) Quality Assurance Management Plan (Pucket, 2002)and prepared in accordance with the State Water Resources Control Board's SWAMP QAPP Template(SWRCB, 2004a)and the SWAMP-QA Checklist(SWRCB, 2004b). f'^ CCWTMP QAPP 5 May 30,2008 Revision 2 Calleguas Creek Watershed TMDL Monitoring Program-Responsible Agencies Cities of Camarillo, Moorpark, Oxnard, Simi Valley and Thousand Oaks, County of Ventura;Ventura County Waterworks District No. 1; Camrosa Water District, Camarillo Sanitary District, U.S. Dept.of Navy; California Department of Transportation;and the Ventura County Agricultural Irrigated Lands Group within the Calleguas Creek Watershed, a subdivision of the Farm Bureau of Ventura County LARWQCB LARWQCB QA Officer Project Manager Yanjie Chu Thanhloan Nguyen Management Committee From MOA Groups 1 from POTW 1 from Urban Dischargers 2 from Agricultural Dischargers 1 from Other Dischargers Regional Board Point of Contact Don Kendall,Chair Calleguas Creek Watershed Water Resources/Quality Subcommittee Fiscal Agent/Program Manager To be determined ---------------------------------------- --------- --------------------------------- Project Manager CONTRACTORS To be determined Field Sampling Laboratories QA Manager Crews Pacific EcoRisk To be determined To be determined and CRG Figure 1.Calleguas Creek Watershed TMDL Monitoring Program Management Structure CCWTMP QAPP 6 May 30,2008 Revision 2 ,. 5. Problem Definition/Background Located in Ventura County California, the Calleguas Creek Watershed (CCW),though relatively small in area, suffers from more water quality impairments than most California watersheds, as defined by the USEPA's 303(4) list. Calleguas Creek drains an area of approximately 343 square miles from the Santa Susana Pass in the east to Mugu Lagoon in the southwest. The main surface water system drains from the mountains in the northeast part of the watershed toward the southwest where it flows through the Oxnard Plain before emptying into the Pacific Ocean through Mugu Lagoon. The watershed, which is elongated along an east-west axis, is about thirty miles long and fourteen miles wide. The Santa Susana Mountains, South Mountain, and Oak Ridge form the northern boundary of the watershed; the southern boundary is formed by the Simi Hills and Santa Monica Mountains. The Clean Water Act requires TMDLs be developed to restore 303(d) listed waterbodies,and the State of California Porter-Cologne Water Quality Act requires that an Implementation Plan be developed to achieve water quality objectives. States must develop water quality management plans to implement the TMDL(40 CFR 130.6). The USEPA has oversight authority for the 303(4) program and is required to review and either approve or disapprove the TMDLs submitted by states. If the USEPA disapproves a TMDL submitted by a state, USEPA is required to establish a TMDL for that waterbody. Figure 2 depicts the CCW and Table 1 presents the reaches of the CCW as identified in the TMDLs. CCWTMP QAPP 7 May 30,2008 Revision 2 0 ,s N Typo Canyon 1 Aftoyo slml y (07) � y J Gy y a 14 i 4, ii} .�/f✓ ri �r r ^y ✓s i 1 .� .7.?..•i ':' �oama�iilo a •�1 4� :`� Rosa 11��, ;_#� ;',:;� Corw)o �) Croe5(10� � -� JL 4•f r �.;��i-�` I i .s� .+. i �i� t'r�,�T�. tflx•� n L I! 1as34:.�sER�' 5 � C-I6 4 1 ii� ` d lax utiC..�r. 0 2.5 5 Wes 23 y' w 0 Calleguas Creek Watershed 0 N Calleguas Creek Watershed CCW Reaches _ Major Roadways - Agriculture-Row Crops,Nursery,Other 00 Calleguas Subwatersheds Streams/Channels �_o r Ventura County Agriculture-Lemon,Orange,Avocado Reach Break Laity VY91W ASSWalee Jtdy,2006 Figure 2.Calleguas Creek Watershed Table 1. Description of CCW Reaches Based on 2002 303(d) List Reach OCs and Reach Name Reach as No. Reach Name Toxicity TMDLs Listed in the 1999 Geographic Description Subwatershed Consent Decree 1 Mugu Lagoon Mugu Mugu Lagoon Lagoon fed by Calleguas Creek Calleguas Calleguas Creek Reach Downstream(south)of Potrero 2 Creek South Callegua§ 1 and Reach 2(Estuary Rd to Potrero Rd.) 3 Calleguas Calleguas Calleguas Creek Reach Potrero Rd. upstream to Creek North g 3(Potrero to Somis Rd.) confluence Conejo Creek Revolon Revolon Slough Main Revolon Slough from 4 Slough Revolon Branch confluence with Calleguas Creek to Central Ave 5 Beardsley Revolon Beardsley Channel Revolon Slough upstream of Channel Central Ave. Arroyo Las Posas Reach Confluence with Calleguas 6 Arroyo Las Las Posas 1 and Reach 2(Lewis Creek to Hitch Road Posas Somis Rd.to Moorpark Fwy(23)) Arroyo Simi Reach 1 End of Arroyo Las Posas 7 Arroyo Simi Arroyo Simi and Reach 2(Moorpark (Hitch Rd)to headwaters in Fwy(23)to Headwaters) Simi Valley. 8 Tapo Canyon Arroyo Simi Tapo Canyon Reach 1 Confluence w/Arroyo Simi up and Reach 2 Tapo Cyn to headwaters �.r Conejo Creek Reach 1 Extends from the confluence 9A Conejo Creek Conejo (Confl with Calleguas with Arroyo Santa Rosa Creek to Santa Rosa downstream to the Camrosa Rd.) Diversion. Conejo Creek Reach 1 Extends from Camrosa 98 Conejo Creek Conejo and Reach2(Confl with Diversion to confluence with Calleguas Creek to Tho. Calleguas Creek. Oaks city limit) Hill Canyon Conejo Creek Reach 2 Confluence w/Arroyo Santa 10 reach of Conejo and Reach 3(Santa Rosa to confluence w/N.Fork; Conejo Creek Rosa Rd.to Lynn Rd.) and N. Fork to just above Hill Canyon WTP Arroyo Santa Conejo Arroyo Santa Rosa Confluence w/Conejo Creek 11 Rosa to headwaters North Fork Conejo Creek Reach 3 Confluence w/Conejo Creek to 12 Conejo Creek Conejo (Tho. Oaks city limit to headwaters Lynn Rd.) Arroyo Conejo Conejo Creek Reach 4 Confluence w/N. Fork to 13 (South Fork Conejo (Above Lynn Rd.) headwaters—two channels Conejo Creek) CCWTMP QAPP 9 May 30,2008 Revision 2 Monitoring Questions The CCW TMDL Monitoring Program (CCWTMP)was developed to meet the monitoring requirements for the four aforementioned TMDLs. The goals of the CCWTMP include: 1. To determine compliance with numeric targets,waste load and load allocations. 2. To test for sediment toxicity at sediment monitoring stations. 3. To identify causes of unknown toxicity. 4. To generate additional land use runoff data to better understand pollutant sources and proportional contributions from various land use types. 5. To monitor the effect of implementation actions by urban, POTW, and agricultural dischargers on in-stream water, sediment, and fish tissue quality. 6. To implement the program consistent with other regulatory actions within the CCW. The CCWTMP is intended to answer the following monitoring questions to meet the goals of the program: 1. Are numeric targets and allocations met at the locations indicated in the TMDLs? 2. Are conditions improving? 3. What is the contribution of constituents of concern from various land use types? Water, sediment, and fish tissue samples collected throughout the watershed will be analyzed to determine whether targets and allocations are being met. Data collected through the CCWTMP will be used in conjunction with historical data to evaluate whether conditions are improving. Samples collected at land use sites will provide data to evaluate the contribution of constituents of concern from each type of land use.to receiving waterbodies. Lastly, the data will be used to evaluate the CCWTMP's effectiveness at answering the monitoring questions and provide guidance for modifications. Water quality or regulatory criteria The Basin Plan Amendments(BPA)for each TMDL provides the applicable allocations and criteria. Data collected through the CCWTMP will be compared against allocations and criteria provided in the BPA to evaluate compliance with the TMDLs. Appendix B contains a copy of the BPA for each TMDL addressed in the CCWTMP. The QAPP is intended to allow for the inclusion of additional monitoring requirements such as those identified in as yet to be adopted TMDLs(e.g., bacteria). 6. Project Description The primary purpose of the QAPP is to outline the process for collecting data to meet the goals of the CCWTMP. Data collected through previous studies were compiled for use in developing the TMDLs and will be considered along with data collected through the CCWTMP. Monitoring is currently being undertaken by various groups including participants in the Ventura County Agricultural Irrigated Lands Group (VCAILG) under the Conditional Waiver for Irrigated Agricultural Lands program(Ag Waiver) and NPDES POTW and MS4 Permittees. Additionally, the Nutrients, Toxicity, OCs, and Metals TMDL Implementation Plans call for special studies to be completed to investigate a range of issues. A summary of special studies is provided in this section and Appendix B contains the BPAs which outline the requirements for the special studies. CCWTMP QAPP 10 May 30,2008 Revision 2 The CCWTMP provides a means for integration of the information developed through these efforts. Data collected through the Ag Waiver, NPDES POTW and MS4 Permittees, and special studies will be incorporated to the extent practicable. The extent practicable will be dictated by the cost of gathering and compiling information from outside programs. It is not the intent or purpose of the CCWTMP to compile and analyze all available data. The QAPP identifies three categories of monitoring: • Required—Required monitoring is intended to determine compliance with the TMDL and meet the BPA monitoring requirements. • Optional—Optional monitoring is monitoring, identified by the responsible parties, which may provide additional relevant information, but is not required to determine compliance with the TMDL or meet the BPA monitoring requirements. • Special Studies—Special studies monitoring is intended to address sample collection for special studies identified in the BPAs or developed through other processes. The QAPP provides information on sample collection and analysis methodologies relevant to all three categories of monitoring. However, it is the intent of the descriptions contained in the following sections to distinguish between what monitoring falls within each category. It is the following descriptions that indicate whether sampling is required, optional, or a special study not a discussion presented later in the QAPP. Required Monitoring Elements The following environmental monitoring elements are required by the BPAs and are included in the CCWTMP: • General water and sediment quality constituents; • Water column and sediment toxicity; • Metals and selenium in water, sediment, fish tissue, and bird eggs; • Organic compounds in water, sediment, and fish tissue; and, • Nitrogen and phosphorus compounds in water. Table 2 lists the constituents for which analysis will be conducted, all of which are considered critical as discussed in Element 14 (Quality Control). Table 2 also provides a general sampling frequency. Element 10(Sampling Process Design) presents the approach to determining sampling frequency, the sample frequency for each site, site selection, and descriptions and maps of site locations. Elements 11 (Sampling Methods) and 13 (Analytical Methods)outline the measurement processes and techniques that will be used to collect information. Additional constituents may be required in the future, dependent on additional TMDLs, the results of Toxicity Identification Evaluations(TIEs), or other unforeseen reasons. In these cases, the QAPP will be amended to provide adequate guidance, as necessary. Constituents that are not identified in Table 2 may be reported as these constituents are typically analyzed along with a suite of constituents. These additional constituents are not considered critical and are above and beyond those required to ,,.., meet TMDL monitoring requirements. However, they will be reported if analyzed. CCWTMP QAPP 11 May 30,2008 Revision 2 �'`•' Table 2.Constituents and Monitoring Frequency for CCWTMP(varies by site) Constituent Frequency Chronic Aquatic Toxicity Quarterly+Two wet events General Water Quality Constituents(GWQC) Monthly or Quarterly based on Flow,pH,Temperature,Dissolved Oxygen, Conductivity,Total Suspended Solids location+Two wet events (TSS),and Hardness Nutrients Ammonia Nitrogen,Nitrate Nitrogen,Nitrite Nitrogen,Organic Nitrogen,Total, Quarterly Kjehdahl Nitrogen(TKN),Total Phosphorus,Orthophosphate-P Organic Constituents In Water Quarter) +Two wet events OC Pesticides'and PCBs2,OP3,Triazine4,and Pyrethroid5 Pesticides y Metals and Selenium In Waters Monthly? Copper,Mercury,Nickel,Zinc, and Selenium Chronic Sediment Toxicity Annually (Every three years in Lagoon) General Sediment Quality Constituents(GSQC) Annually Total Ammonia,Percent Moisture,Grain Size Analysis,Total Organic Carbon(TOC) (Every three years in Lagoon) Organic Constituents In Sediment r Annually OC Pesticides'and PCBs2,OP Pesticides3,and Pyrethroids5 (Every three years in Lagoon) Additional Constituents For Mugu Lagoon Sediment Every three years Metals s Tissue Annually Percent Lipids,OC Pesticides'and PCBs9,OP Pesticides3,and Metals'O (Every three years in Lagoon) 1 OC Pesticides considered: aldrin,alpha-BHC, beta-BHC,gamma-BHC(lindane),delta-BHC,chlordane-alpha, chlordane-gamma,2,4'-DDD,2,4'-DDE,2,4'-DDT,4,4'-DDD,4,4'-DDE,4,4'-DDT,dieldrin,endosulfan I and ll, endosulfan sulfate,endrin,endrin aldehyde,endrin ketone,and toxaphene 2 PCBs in water and sediment considered: Aroclors identified in the CTR(1016, 1221, 1232, 1242, 1248,1254,and 1260). 3 OP Pesticides considered: chlorpyrifos,diazinon,and malathion. Chlorpyrifos is the only OP pesticide that will be measured in tissue as it is the only OP listed in tissue. 4 Triazine Pesticides considered: atrazine,prometryn,and simazine. 5 Pyrethroid Pesticides considered: bifenthrin,cyfluthrin,cypermethrin,deltamethrin,and permethrin 6 Copper,mercury,nickel,and zinc will be measured as dissolved and total recoverable. 7 The Metals TMDL BPA requires that instream water column samples be collected monthly for analysis of GWQC and copper,mercury,nickel,selenium,and zinc for the first year. 8 Includes arsenic,cadmium,copper,lead,mercury,nickel,selenium and zinc. Arsenic,lead,and cadmium are included in addition to constituents required in the Metals TMDL as they have been found in previous sediment studies conducted in Mugu Lagoon to exceed guideline values used to interpret the relationship between sediment chemistry and biological impacts. 9 PCBs in tissue considered: individual congers. 10 Mercury and Selenium will be measured in fish tissue and bird eggs. Optional Monitoring Elements All optional monitoring is considered above and beyond what is necessary to meet the requirements of the BPAs and answer the monitoring questions. Optional monitoring is presented in the QAPP so the procedures for conducting the monitoring are available should the Management Committee decide to conduct the monitoring. The following environmental monitoring elements are considered optional: • Grain size fraction analysis of bed sediment and stormwater. Grain size fraction analysis CW is not necessary to determine compliance with water and sediment wasteload allocations CCWTMP QAPP 12 May 30,2008 Revision 2 as OC and Toxicity TMDL allocations are set for whole samples not the various fractions within a sample. The various fractions(aqueous and sediment and the two grain size fractions) may assist in developing an understanding of how target organic constituents are transported through the watershed. Grain size fraction analysis is further described in the Grain Size Fraction Analysis section of Element 13 (Analytical Methods). • Toxicity to either Mytilus edulis or Crassostrea gigas embryo due to exposure to Mugu Lagoon sediments. Embryo testing is not necessary to evaluate the presence or absence of sediment toxicity as the standard method for testing sediments for toxicity in saltwater, which is the use of a standard test species such as Eohaustorius estuarius, is scheduled to occur through the Required Monitoring Element of the QAPP. Embryo testing provides additional information for comparison to the California Sediment Quality Objectives, which are applicable only to subtidal environments. Embryo toxicity testing is further described in the Toxicity Testing and Toxicity Identification Evaluations(TIEs)section of Element 13 (Analytical Methods). • Macrobenthic community assessment in Mugu Lagoon. Macrobenthic community assessment is intended to provide additional information to evaluate toxicity in Mugu Lagoon. Similar to the embryo toxicity testing, this assessment is not necessary to evaluate the presence or absence of sediment toxicity rather it provides additional information for comparison to the California Sediment Quality Objectives. Macrobenthic community assessment in Mugu Lagoon is further described in the Macrobenthic Community Assessment section of Element 13 (Analytical Methods). The Management Committee will determine when any optional monitoring elements will be included. The Project Manager will provide recommendations on optional monitoring elements to the Management Committee at a minimum annually. The Management Committee will determine each year whether the optional monitoring should be initiated, modified, or eliminated (although optional monitoring may be revised more frequently if approved by the Management Committee). Modifications to optional monitoring elements will be documented in the Annual Report. The decision to initiate, modify,or eliminate optional monitoring shall be communicated to the Regional Board Project Manager so the Regional Board is clearly informed of the monitoring that is to occur. Table 3 lists the constituents and analysis which are considered optional. These constituents and analysis are not considered critical as discussed in Element 14(Quality Control). Table 3 also provides a general sampling frequency. Element 10(Sampling Process Design) presents the approach to determining sampling frequency, sample frequency for each site, site selection, and descriptions and maps of site locations. Elements 11 (Sampling Methods) and 13(Analytical Methods)outline the measurement processes and techniques used to collect information. Table 3.Optional Constituents and Monitoring Frequency for CCWTMP(varies by site) Constituent Frequency Organic Constituents In Water-Grain Size Fractions' One wet event annualy OC Pesticides and PCBs,OR Triazine,and Pyrethroid Pesticides Organic Constituents In Sediment-Grain Size Fractions' Annually OC Pesticides and PCBs,OP,Thazine,and Pyrethroid Pesticides (Every three years in Lagoon) Additional Constituents For Mugu Lagoon Sediment Macrobenthic community assessment Every three years A-- Sediment Toxicity-Embryo Mytilus edulis or Crassostrea gigas 1 Please see Table 2 for a list of individual constituents in each suite. CCWTMP QAPP 13 May 30,2008 Revision 2 Special Studies The Nutrients,Toxicity, OCs, and Metals TMDL Implementation Plans identify required and optional special studies to investigate a range of issues(Appendix B). As the primary purpose of the QAPP is to outline the process for collecting data, the QAPP is an appropriate place to include information on sample collection and analysis methodologies used in special studies. No specific special studies are incorporated into the QAPP at this time; however, a summary of special studies that may be incorporated at a later date are provided below. Work plans for specific special studies will be submitted to the Regional Board Executive Officer for approval per the BPAs. Additional special studies may be added as other TMDLs are completed (e.g., bacteria)or developed through other processes. Nutrient TMDL Special Studies • Determine the effectiveness of agricultural BMPs in reducing nutrient loadings. • Monitoring of minor point sources for nutrients to confirm assumptions that the loadings from these sources are minor; • Monitoring of greenhouse discharges and runoff to assess loadings from these sources; • Monitoring of groundwater extraction and discharges in the Arroyo Santa Rosa subwatershed and other areas that may add significant nutrient loadings to Calleguas Creek; and • Additional studies of the type and extent of algae impairment in Calleguas Creek and Mugu Lagoon. OCs and PCBs TMDL Special Studies • Quantify sedimentation in Watershed and evaluate management methods, targets and allocations for siltation/sedimentation. • Evaluate the concentration of OCs in sediments from various sources/land use types. • Identify land areas with high OCs concentrations. • Evaluate natural attenuation rates and evaluate methods to accelerate OCs attenuation and examine the attainability of allocations. • Examine the food web and bioconcentration relationships to evaluate the Linkage Analysis. This special study is identified as optional in the BPA. Toxicity TMDL Special Studies • Investigate diazinon and chlorpyrifos replacement pesticides. • Consider results of OCs special studies. Metals TMDL Special Studies • Evaluation and Initiation of Natural Sources Exclusion. • Identification of Selenium Contaminated Groundwater Sources. • Investigation of Soil Concentrations and Identifications of"Hot Spots". • Determination of Water-Effect Ratio for Copper in Revolon Slough. • Determination of Site-Specific Objectives for Mercury and Selenium. Project Schedule The Effective Date of the Toxicity and OCs TMDLs is March 26, 2006. Per the BPAs, Responsible •"- Parties must finalize and submit a workplan for a Monitoring Program for approval by the Regional CCWTMP QAPP 14 May 30,2008 Revision 2 4" Board Executive Officer(EO)six months after the effective date, which is September 26, 2006. .r. The QAPP was submitted by the Stakeholders on September 26, 2006 to meet the BPA deadline. Comments provided by the Regional Board were received by Stakeholders on April 24, 2007. Revisions to the QAPP were incorporated into an August 15, 2007 Draft, which was approved by the Regional Board on October 15, 2007. The Effective Date of the Metals TMDL is March 26, 2007. Per the BPAs, Responsible Parties must finalize and submit a workplan for a Monitoring Program for approval by the Regional Board Executive Officer(EO)three months after the effective date,which is June 26, 2006. A draft approach was submitted by the Stakeholders on June 26, 2007 to meet the BPA deadline. Regional Board comments on the approach are incorporated into this version of the QAPP. Table 4 outlines the deliverable schedule for the first year of monitoring. However, this schedule assumes EO approval of the Monitoring Program within one month of the submittal of this version (Revision 1)of the QAPP. If EO approval is delayed, the project deliverable schedule will be modified. The Annual Report for the first year of monitoring will be submitted so that it encompasses a single water year(October through September). In the case of the first year of monitoring, if monitoring were to be initiated in April 2008, as presented in Table 4,the first year Annual Report would be submitted in February 2009. Table 4.Year 1 Project Deliverable Schedule for CCWTMP Deliverable Anticipated Date of Initiation Anticipated Date of Completion Revised QAPP to incorporate Metals April 2008 May 2008 TMDL BPA Requirements 1s'Cycle of Monitoring' August 2008 September 30,2009 Review of 1u Set of Data August 2008 December 31,2009 15t Annual Report2 December 31, 2009 February 27,2010 1 Monitoring must be initiated for the Nitrogen,OC Pesticides and PCBs,and Toxicity TMDLs by August 10, 2008 per the Regional Board's QAPP approval letter dated October 15,2007. Metals monitoring must be initiated within three months after EO approval of the QAPP incorporating those requirements per the BPA. All dates after QAPP submission will be tied to EO approval. 2 Data will be delivered in an electronic format along with the Annual Report. 7. Quality Objectives and Criteria for Measurement Data The objective of the monitoring program, in terms of data quality, is to produce data that represent as closely as possible, in situ conditions of the CCW. This objective will be achieved by using accepted methods for sample collection and laboratory analysis. Assessing the program's ability to meet this objective will be accomplished by evaluating the resulting laboratory measurements in terms of reporting limits, precision, accuracy, representativeness, comparability, and completeness, as presented in Section B. Table 5 lists the constituents that will be measured through this monitoring program. Table 5 lists constituents that were not identified in Table 2 as these constituents are typically analyzed along with a suite of constituents. The additional constituents listed in Table 5 are not considered critical and are above and beyond what are required to meet TMDL monitoring requirements. CCWTMP QAPP 15 May 30,2008 Revision 2 Table 5. Data Quality Objectives Parameter Accuracy Precision Recovery Target Reporting Completeness Limits Field Measurements Water Velocity(for Flow calc.) +2% NA NA 0.05 ft/sec pH +0.2 pH units +0.5 pH units NA NA Temperature +0.5 oC +5% NA NA Dissolved Oxygen +0.5 mg/L +10% NA 0.5 mg/L Turbidity +10% +10% NA 0.2 NTU Conductivity +5% +5% NA 2.5 umhos/cm Laboratory Analyses—Water Aquatic Toxicity [1] [2] NA NA Hardness 70-130% 0-30% 70—130% 5 mg/L Total Suspended Solids(TSS) NA 0-30% NA 1 mq/L Ammonia Nitrogen 70-130% 0-30% 70—130% 0.1 mg/L Nitrate Nitrogen 70-130% 0-30% 70—130% 0.1 mg/L Nitrite Nitrogen 70-130% 0-30% 70—130% 0.05 mg/L Organic Nitrogen NA NA NA NA Total Kjehdahl Nitrogen(TKN) 70-130% 0-30% 70—130% _ 0.5 mglL Total Phosphorus 70-130% 0-30% 70—130% 0.1 mgtL Orthophosphate-P 70-130% 0-30% 70—130% 0.01 mg/L OC Pesticides3 MDL—155% 0-30% MDL—155% See Element 13 PCB Congeners3 60-125% 0-30% 60—125% See Element 13 PCB Aroclors3 65-135% 0-30% 65—135% See Element 13 OP Pesticides3 45-125% 0-30% 45—125% See Element 13 Pyrethroids3 65-125% 0-30% 65—125% See Element 13 See Element 14 `�• Triazines3 70-130% 0-30% 70—130% See Element 13 Dissolved Organic Carbon 50-150% 0-30% 50—150% See Element 13 (Quality Control) Metals3 45-150% 0-30% 45—150% See Element 13 Laboratory Analyses—Sediment Sediment Toxicity [1] [2] NA NA Macrobenthic Community Assessment NA NA NA lowest practical taxonomic level Total Ammonia in Sediment 70-130% 0-30% 70—130% 0.05 mg/wet kg Percent Moisture NA 0-30% NA 0.1% Particle Size Distribution NA 0-30% NA 0.04 um Total Organic Carbon(TOC) NA 0-30% MA 0.05%Dry Weight OC Pesticides3 25-145% 0-30% 25—145% See Element 13 PCB Congeners3 60-125% 0-30% 60—125% See Element 13 PCB Aroclors3 65-135% 0-30% 65—135% See Element 13 OP Pesticides3 35-135% 0-30% 35—135% See Element 13 Pyrethroids3 55-130% 0-30% 55—130% See Element 13 Metals3 10-180% 0-30% 10—180% See Element 13 Laboratory Analyses—Tissue Percent Lipids NA 0-30% NA 0.05% OC Pesticides3 MDL—155% 0-30% MDL—155% See Element 13 PCB Congeners3 60-125% 0-30% 60—125% See Element 13 PCB Aroclors3 65-135% 0-30% 65—135% See Element 13 OP Pesticides3 45-125% 0-30% 45—125% See Element 13 Metals3 45-155% 0-30% 45—155% See Element 13 1 Must meet all method performance criteria relative to the reference toxicant test. 2 Must meet all method performance criteria relative to sample replicates. 3 Please see Table 2 for a list of individual constituents in each suite. CCWTMP QAPP 16 May 30,2008 Revision 2 8. Training and Certification No specialized training or certifications are required for sampling personnel. However,staff that will perform field sampling should receive annual refresher training to ensure the samples are collected correctly and safely. The Project Manager, or designee, will provide training prior to initiation of sampling and will document training of staff. Documentation will consist of a sign in sheet,time and date,and instructor. The documentation will be maintained in the project files of the Project Manager. All sampling shall be performed under the supervision of experienced staff. No volunteers will be used for sampling. At minimum, laboratories selected to perform analysis for this program must maintain current certification through the California Department of Health Services—Environmental Laboratory Accreditation Program (ELAP)or the National Environmental Laboratory Accreditation Program (NELAP). Pacific EcoRisk(toxicity testing laboratory)and CRG Marine Laboratories (chemistry laboratory)are both certified by the NELAP;their certificate numbers are 04225CA and 2261, respectively. Any additional laboratories used to conduct analysis on CCWTMP samples will be accredited by ELAP and/or NELAP and meet the requirements outlined in the QAPP. Toxicity and chemistry laboratories are required to maintain records of analyst training and will make these records available upon request. 9. Documents and Records Documents and records generated and maintained for the CCWTMP include the following: Event Summary Reports,Analytical Data Reports, QAPP, and the Annual Report. The Event Summary Reports,Analytical Data Reports, and QAPP are discussed in detail in this section. The Annual Report is discussed in detail in Element 21 (Reports to Management). Event Summary Reports Event Summary Reports will be created by the field crew and submitted to the Project Manager and Project QA Manager, or designee, within one week of the completion of each sampling event, and will consist of the following: 1. A brief(one to two page) narrative summary of samples successfully collected; 2. A summary of any deviations from the QAPP; 3. A discussion of any problems encountered during the sample event; 4. A discussion of any follow up action required (e.g., follow up toxicity analysis); and, 5. A copy of the field log book and Chain-of-Custody(COC)forms. The field log book and COCs will be scanned into PDFs and stored in electronic format by the Project Manager and in hard copy by the field crew lead. The field log book and COC forms are discussed in Element 12(Sample Handling and Custody). Analytical Data Reports Analytical data reports will consist of a hardcopy report in each laboratory's standard format and in an electronic format approved by the Project Manager. All final data reports will include the results of Quality Assurance analyses and a narrative summary of Quality Control data for the CCWTMP QAPP 17 May 30,2008 Revision 2 environmental results reported. Results of chemical analyses, toxicity testing, and any Toxicity Identification Evaluations(TIEs) performed will be provided to the Project QA Manager, or designee, in the laboratory's standard report format within 30 days of sample delivery and in an approved electronic data format. In addition to the laboratory's standard reporting format, all results meeting data quality objectives and results having satisfactory explanations for deviations from data quality objectives shall be reported in tabular format on electronic media. For each sample analyzed, the analyzing laboratory shall provide the following information: • Lab Name • CAS number • Client Sample ID . Analytical method(s) • Lab Sample ID . Method detection limit(MDL), if applicable • Date of sample receipt • Reporting limit(RL), if applicable • Date and time of collection • Measured value of the analyte or parameter • Date of sample preparation, if applicable • Units • Parameter • Relative percent differences, if applicable • Batch Number • Percent recovered, if applicable • Method of sample preparation, if applicable • Dilution factor, if applicable • Date(s)of analysis • Matrix In addition, the analyzing laboratory shall provide results from all laboratory QC procedures (blanks, duplicates, spikes, reference materials, etc.)and the sample IDs associated with each sample batch. Data reports will be compiled in a database as described in Element 19 (Data Management). The CAS number may be added during the data compilation process if the laboratory is not set up to provide the number in their data report. QAPP The Project Manager or designee is responsible for the development, distribution, and management of the QAPP. Distribution and Management of Documents The Project Manager, or designee, is responsible for the development, distribution, and management of the approved QAPP,Annual Report(including the database), and other relevant documentation to all individuals listed in Element 3 of this document. All hard copy and electronic data will be stored by the Project Manager, or designee. Data will be maintained for the length of the program and will be available for review. A backup copy of each data report will be placed on an external storage device(i.e.,compact disc). Upon completion of the CCWTMP, hard copy data will be retained for an addifional five years. B. DATA GENERATION AND ACQUISITION Sample collection and analysis will be the most involved and resource intensive aspect of the monitoring program. The numerous requirements and considerations which must be taken into account are described below. CCWTMP QAPP 18 May 30,2008 Revision 2 10. Sampling Process Design The following Element provides a description and justification for the sampling design strategy and site selection. The primary driver in designing the monitoring outlined in the QAPP is to meet the monitoring requirements of the TMDL implementation plans. Toxicity, OCs, Nutrients, and Metals TMDL monitoring requirements can be broken out into two types: compliance and investigation. In addition to the monitoring sites sampled as part of the CCVVTMP, an effort will be made to obtain data from other monitoring programs in the watershed. Additionally, results generated through the CCWTMP may be used by other programs. Element 18 (Non-Direct Measurements)describes the process for including data collected through other programs. These programs include NPDES permitted entities and Ag Waiver program participants. It is the desire of the responsible entities to avoid duplicative sampling efforts and additional coordination will occur as each program develops. Optional monitoring is included in the QAPP and identified as such. Optional monitoring may be conducted to provide supplementary information to assist in developing a more complete understanding of the watershed. However, as certain components of monitoring are above and beyond what is required in the TMDL these components may be may be modified or eliminated by the Management Committee per the process outlined in the Optional Monitoring Elements section of the Project Description (Element 6). Changes to aspects of the sampling process design related to meeting the monitoring requirements of the TMDL implementation plans will be recommended in the Annual Report and agreed upon by the Management Committee identified in Element 4(Project Organization) and the Regional Board Project Manager. Additional changes may be required in the future, dependent on additional TMDLs(e.g., metals and bacteria), the results of Toxicity Identification Evaluations (TIEs), or other unforeseen reasons. In these cases, the QAPP will be amended to provide adequate guidance, as necessary. Compliance Monitoring For compliance monitoring to address the Toxicity, OCs, and Nutrient TMDLs, in-stream water column samples will be collected quarterly for analysis of water column toxicity, general water quality constituents(GWQC), target organic constituents, and nutrients. Target organic constituents for the OCs TMDL include the OC Pesticides and PCBs listed as a footnote in Table 2. Target organic constituents for the Toxicity TMDL include the OP, pyrethroid, and triazine pesticides listed as a footnote in Table 2. Although pyrethroids are not on the 303(d) list and have not been identified as contributing to toxicity in the CCW, they have been identified as contributing to sediment toxicity elsewhere in California as the use of this group of pesticides increases (Weston et al., in press). Triazine herbicides are not on the 303(d) list and have not been identified as contributing to toxicity in the CCW, however they are included because the potential exists for toxicity caused by chlorpyrifos and diazinon to be increased in their presence(Anderson and Lydy, 2002). For compliance monitoring to address the Metals TMDL, in-stream water column samples will be collected monthly for analysis of general water quality constituents(GWQC)and target metals listed as a footnote in Table 2. The Metals TMDL BPA requires that instream water column CCWTMP QAPP 19 May 30,2008 Revision 2 samples be collected monthly for the first year. After the first year, Metals monitoring will occur quarterly, unless a review of the available data indicate a need to continue monthly monitoring. The decision will be determined through consultation between the Project Manager and Regional Board staff. Water column samples in Mugu Lagoon will be collected quarterly. Note that the BPA did not contain any requirements to collect samples within the lagoon except at the Ronald Regan St Bridge (formally 11th St). Collection of metals samples within the lagoon is an optional element. In-stream water column samples to measure compliance for the Toxicity, OCs,and Metals TMDLs will generally be collected at the base of each of the subwatersheds used to assign waste load and load allocations, per the BPAs. In-stream water column samples to measure compliance for the Nutrients TMDL will generally be collected at the base of each listed reach. Site selection procedures and the locations of the compliance monitoring sampling stations are discussed in subsequent sections. Toxicity identification evaluations(TIEs)will be conducted on toxic samples as outlined in the Toxicity Testing and TIE section of Element 13(Analyfical Methods). Environmentally relevant detection limits will be used to the extent practicable. Detection limits will be the lower of either the allocations or the numeric targets presented in the TMDLs, if attainable at a commercial laboratory through standard analytical techniques. Additionally, POTW effluent will be monitored for compliance with the effluent limits presented in the Toxicity, OCs, and Metals TMDL BPAs. Nutrients will not be monitored through the CCWTMP as the POTWs are currently monitoring for all nutrient constituents identified in Table 2. However, the data collected by the POTWs will be considered in the TMDL Annual Report. All efforts will be made to include two additional wet weather water sampling events for compliance monitoring for the OCs and Toxicity TMDLs during targeted storm events between October and April. Wet weather sampling conditions are discussed in the Sampling Schedule section of this Element. Wet weather water samples will not be collected at POTWs as POTW effluent during wet weather was not identified as a significant source of constituents identified in the TMDLs. Streambed sediment samples will be collected annually for analysis of sediment toxicity, general sediment quality constituents (GSQC), and target organic constituents in the freshwater monitoring sites in the watershed. An annual frequency was selected as it will provide sufficient data over the implementation timeframe (20 years for the OCs TMDL)to evaluate changes in sediment quality due to implementation actions. Additionally, an annual frequency is consistent with similar monitoring programs conducted in California, including the Central Coast Agricultural Conditional Waiver for Irrigated Lands Monitoring Program and the San Gabriel River Regional Monitoring Program. Sediment samples will be collected in Mugu Lagoon once every three years for analysis of sediment toxicity, GSQC, target organic constituents, metals and selenium. A frequency of every three years was selected for Mugu Lagoon sediment sampling due to the relatively slow sedimentation rates in the lagoon. A model developed to simulate hydrodynamics and sediment transport in Mugu Lagoon estimated sedimentation deposition rates which varied across the lagoon from less than 0.6 to greater than 3 centimeters (cm) per year(RMA, 2003). Collection of sediment samples, which for most parameters occurs in the top two to three cm, would exceed annual deposition rates within portions of the lagoon resulting in the characterization of current and historical deposits. The time period represented in samples would vary from site to site based on deposition rates. In addition, pollutants identified as causing toxicity may be related CCWTMP QAPP 20 May 30,2008 Revision 2 to historical deposits. Although identifying the presence and cause of toxicity, even if related to historical deposits, provides information on current conditions in the lagoon it does not provide the information needed to implement or modify BMPs. Fish tissue samples will be collected annually in freshwater portions of the watershed to assess changes in concentrations of target organic constituents. Fish tissue samples will be collected every three years in Mugu Lagoon. The same reasoning used for establishing sediments sampling frequency was used to establish fish tissue sample collection frequency. %awl e CCWTMP QAPP 21 May 30,2008 Revision 2 Investigation Monitoring Investigation monitoring focuses on investigating the contribution of constituents of concern from various land uses in the watershed and several areas where toxicity has been observed to occur in the past that are not addressed by compliance monitoring. Additional investigation monitoring will focus on evaluating nutrient loading during wet weather. Land Use Discharge Investigation Land use discharge samples will generally be collected concurrently(on the same day when possible)with compliance monitoring at representative agricultural and urban discharge sites generally located in each of the subwatersheds and analyzed for selected GWQC and target organic constituents. Land use sampling stations are generally located at a point where water from a representative group of similar land uses discharges to one of the major reaches of the CCW listed in Table 1. Nutrient Investigation Sampling in support of nutrient investigation monitoring will focus on evaluating urban land use and open space contributions of nutrients and nutrient loads in receiving waters during wet weather. The urban land use component of nutrient investigation monitoring is addressed through the land use discharge investigation discussed above. An open space site was selected at a location in the watershed where flows are present throughout the year from a drainage that is comprised entirely of open space. Evaluation of nutrient loading during wet weather will be addressed through collecting samples at compliance monitoring sites and urban, agricultural, and open space land use monitoring sites. Nutrient investigation monitoring is intended to occur during the first year of the �...., CCWTMP, unless results suggest continuing at one or more sites. Toxicity Investigation For water toxicity investigation monitoring, in-stream water column samples will be collected at two sites where the cause(s)of water toxicity have not been identified. The locations of toxicity investigation sampling sites are discussed in the following Sampling Sites section. These samples will be analyzed for the same constituents as toxicity compliance monitoring, and TIEs will be conducted on toxic samples as outlined in the Toxicity Testing and TIE section of Element 13. All efforts will be made to include two additional wet weather water sampling events for toxicity and land use investigation monitoring during targeted storm events between October and April. Wet weather sampling conditions are discussed in the Sampling Schedule section of this Element. For sediment toxicity investigation monitoring, streambed sediment samples will be collected in two reaches of the CCW where the cause(s)of sediment toxicity have not been identified. These samples will be analyzed for the same constituents as toxicity compliance monitoring, and TIEs will be conducted on toxic samples as outlined in the Toxicity Testing and TIE section of Element 13. Sampling Sites Compliance monitoring sampling sites for the Nutrients TMDL are generally located at the base of each listed reach. Compliance monitoring sampling sites for the OCs and Toxicity TMDLs are generally located at the base of each of the six subwatersheds and at the POTW effluent discharge locations. Compliance monitoring sampling sites for the Metals TMDL are located in the Mugu CCWTMP QAPP 22 May 30,2008 Revision 2 Lagoon, Revolon Slough, and Calleguas Subwatersheds and at the relevant POTW effluent discharge locations. In the case of the Revolon Slough and Calleguas Subwatersheds, compliance monitoring sampling sites are located upstream of the base of the subwatersheds as 1)these locations are not tidally influenced and 2)the majority of the toxicity, OCs and PCBs, and metals data in these subwatersheds have been collected at the upstream locations. Compliance monitoring sampling sites for sediment toxicity are located in the Revolon Slough, Calleguas, and Mugu Lagoon Subwatersheds. Fish tissue samples in the freshwater portion of the CCW will be collected near the water compliance monitoring sampling sites,to the extent practicable. In the case of the Mugu Lagoon Subwatershed, compliance with water targets will be measured at the base of the upstream subwatersheds to the lagoon. Compliance with sediment targets will be measured in several zones throughout the lagoon in subtidal areas that consistently maintain a salinity level of greater than 25 ppt. Sediment sampling zones were located in subtidal areas with salinity level of greater than 25 ppt so that data could be compared to the California Sediment Quality Objectives. Because of shifting shoals and sand bars in the lagoon, sediment samples will be collected from the deepest part of the channel in the sampling zones instead of reoccupying stations based only on GPS coordinates. Fish tissue samples will be collected from the central portion and the western arm of the lagoon. As discussed previously, monitoring programs such as the Ag Waiver Program and NPDES programs (POTW and Stormwater) collect water samples throughout the CCW. In some instances sites associated with other programs overlap with CCWTMP sites. In other instances, sites for other programs are located in areas where there are currently no CCWTMP sites. For example, there are Ag Wavier sites that measure toxicity in the Beardsley Wash (Reach 5)area and POTW �- sites that measure for OC pesticides in the Hill Canyon area of Conejo Creek(Reaches 10 and 12). These data will be considered with data collected through the CCWTMP as discussed in Element 18 (Non-Direct Measurements). Table 6 presents information on compliance monitoring sites and sample collection frequency. Figure 3 through Figure 5 present the general locations of the receiving water compliance monitoring sites for water, sediment, and fish tissue, not including Mugu Lagoon. Figure 6 presents the general locations of the POTW effluent discharge sites. Figure 7 and Figure 8 present the general locations of the compliance monitoring zones in Mugu Lagoon for sediment and fish tissue, respectively. Nutrient investigation sites,which are not land use sites,correspond to existing nutrient compliance monitoring sites and are presented in Figure 3. Table 6 presents information on nutrient investigation monitoring sites and sample collection frequency. The water and sediment toxicity investigation sampling sites coincide with current and previous sampling programs in the CCW. Figure 9 presents the general locations of the water and sediment toxicity investigation sampling sites in the CCW. Table 7 lists the water and sediment toxicity investigation sampling sites and sampling frequency. At least one agricultural and urban discharge land use sampling station is located in each subwatershed. Land use sampling stations are generally located at a point where water from a representative group of similar land uses discharges to one of the major reaches of the CCW listed in Table 1. An open space land use site is also included for evaluating nutrient loadings as part of the nutrient investigation. Land use sampling sites coincide with current and previous sampling CCWTMP QAPP 23 May 30,2008 Revision 2 programs in the CCW, where available. Figure 10 presents the general locations of the land use sampling sites in the CCW. Table 8 presents land use sampling stations and sampling frequency. The process for selection of appropriate sites was based on location within a subwatershed for which waste loads and loads were allocated, existing data, and access considerations. Current or previously used sampling sites were selected whenever practical to save time and resources, and to provide historical data. Selecting sites previously or currently in use for other monitoring efforts ensures that they are easily accessible and maximizes opportunities for future cost sharing. Waste load and load allocations were assigned by 303(d) listed reach in the Nutrients TMDL. Accordingly, at least one compliance monitoring site is located in each 303(d) listed reach. Waste load and load allocations were assigned by modeling subwatersheds in the Toxicity, OCs, and Metals TMDLs. Accordingly, at least one compliance monitoring site is located in each modeling subwatersheds. Investigation sites for water and sediment toxicity were selected based on existing data suggesting impairment. Investigation sites for various land use sites were selected based on land use, existing data, and access considerations. Investigation sites for nutrients were selected based on land use and existing data suggesting impairment. The number and location of sites may be revised if existing sites become inaccessible, if it is determined that alternative locations are needed, or if the number of land use stations needed to appropriately characterize discharges needs modification. At such a time as numeric targets are consistently met, an additional site or sites within the subwatershed will be considered for monitoring to ensure allocations are met throughout the subwatershed. Any changes with regard �. to the number and location of sites will be determined through discussions between the Project Manager, Project QA Manager, and field staff and will be documented in the Annual Report. Sites are identified with a unique identification code to assist in identifying the location and purpose of the site and to ensure results are properly assigned. Sites are identified such that the reach, location identifier(such as a cross street, where available), and site type (receiving water, discharge, or tributary) can be distinguished. The format for Site ID codes is##X_AAAA, where: • ##indicates the reach in which the site is located, or in the case of a discharge or tributary sites, the reach to which the discharge or tributary drains to. • X identifies whether the site is a discharge site(D), and tributary site (T), or a receiving water site (in which case no identifier is used). • AAAA indicates the cross street, where available, such as WOOD for Wood Road on the Oxnard Plain. In some instances a cross street is not available and another location identifier is used to provide an indication of site location. Appendix A presents detailed descriptions of and directions to the sampling sites identified in this plan. CCWTMP QAPP 24 May 30,2008 Revision 2 t Table 6.CCWTMP Compliance Monitoring and Nutrient Investigation Sites and Annual Sampling Frequency i GPS Coordinates Water Sediment Tissue I Sub Site Id Reach Site Location watershed Lat Long Tom Pests/ Nutt Meta12 Gen Tox Pests Metal Pests/ Meta13 PCBs2 Chem2 (PCBs PCBs 01—RR—BR 1 Ronald Reagan St Bridge 34.109 -119.0916 6 6 6 12 6 NA NA NA NA NA 01_BPT_3 1 Located In Eastern Arm NA NA NA 4 NA 01_BPT_6 1 Located In Eastern Part Of NA NA NA 4 NA Western Arm Located In The Central General Site te 01_BPT_14 1 Part to The Western Arm Locations Are NA NA NA 4 NA Mugu Provided As Each Site Lagoon 01_BPT_15 1 Located In Central Lagoon Represents A NA NA NA 4 NA Once Every Three Once Every Located In Central Generalized Sample Years Three Years 01—SG-74 1 Lagoon,South Of Drain Collection Zone In NA NA NA 4 NA #7 Which A Sample Will ! Central 1 Lagoon Sampled In Central Be Collected. Lagoon NA NA NA NA NA Western 1 Sampled In Western Arm NA NA NA NA NA Arm Of The Lagoon 04—WOOD 4 Revolon Slough East Side 34.1703 -119.0953 6 6 6 12 6 1 1 NA 1 1 Revolon Of Wood Road Slough 05_CENTR 5 Beardsley Wash At 34.2300 -119.1128 NA NA 6 NA NA NA NA NA NA NA Central Avenue Calleguas Creek 02_PCH 2 Northeast Side Of Hwy 1 34.1119 -119.0818 NA NA 4 NA NA NA NA NA NA NA Bridge 03_UNIV 3 Calleguas Creek At 34.1798 -119.0441 6 6 6 12 6 1 1 NA 1 NA University Drive Calleguas 03D_CAMR 3 Camrosa Water 34.1679 -119.053 4 4 NA 12 4 NA NA NA NA NA Reclamation Plant 9A_HOWAR 9A Conejo Creek At Howard 34.1931 -119.0025 NA NA 4 NA NA NA NA NA NA NA Road Bridge 9AD_CAMA gA Camarillo Water 34.1938 -119.0017 4 4 NA 12 4 NA NA NA NA NA Reclamation Plant Continued On Next Page CCWTMP QAPP 25 May 30,2008 Revision 2 Sub Site Id Reach Site Location GPS Coordinates Water Sediment Tissue watershed Lat Long Tox2 Pests/ Nutt Meta12 Gen Tox Pests Metal Pests/ Meta13 PCBs2 Chew /PCBs PCBs 96_ADOLF 9B Conejo Creek At Adolfo 34.2125 -118.9894 6 6 6 NA 6 NA 1 NA 1 NA Road 10—GATE 10 Conejo Creek Hill Canyon Below N Fork 34.2178 -118.9281 NA NA 6 NA NA NA NA NA NA NA Conejo 10D_HILL 10 Hill Canyon Wastewater 34.2131 -118.925 4 4 NA 12 4 NA NA NA NA NA Treatment Plant 12—PARK 12 Conejo Creek North Fork Above Hill Canyon 34.2144 -118.915 NA NA 4 NA NA NA NA NA NA NA 13—BELT 13 Conejo Creek S Fork 34.2078 -118.9194 NA NA 4 NA NA NA NA NA NA NA Behind Belt Press Building 06_SOMIS 6 Arroyo Las Posas Off 34.254 -118.9927 6 6 6 NA 6 NA 1 NA 1 NA Somis Road Las Posas Ventura County f 06D—MOOR 6 Wastewater Treatment 34.269 -118.933 4 4 NA NA 4 NA NA NA NA NA Plant 07—HITCH 7 Arroyo Simi East Of Hitch 34.2717 -118.9228 6 6 6 NA 6 NA 1 NA 1 NA Boulevard Arroyo 07_MADER 7 Arroyo Simi At Madera 34.2778 -118.7958 NA NA 6 NA NA NA NA NA NA NA Simi Avenue O7D_SIMI 7 Simi Valley Water Quality Control Plant 34.2814 -118.815 4 4 NA NA 4 NA NA NA NA NA i � 1 Tissue samples will be collected in the same location as water and sediment samples. Samples may be collected elsewhere if no fish are found at pre-established sample stations. 2 Includes two wet events per site except for POTWs(Bolded sites indicate the sites selected for the nutrient investigation monitoring). 3 Bird egg samples will be collected and analyzed for mercury and selenium in Mugu Lagoon. NA—Not Analyzed Tox—Samples will be analyzed for toxicity and-OP,triazine,and pyrethroid pesticides as listed in Table 2. Toxicity in water will not be analyzed at 01_RR_BR or at the POTWs. Pests/PCBs—Samples will be analyzed for OC pesticides and PCBs as listed in Table 2. Chlorpyrifos will be analyzed in tissue at 04_WOOD as it is listed in this reach. Nutrients—Samples will be analyzed for Nutrients as listed in Table 2. Metals—Samples will be analyzed for Metals as listed in Table 2. Gen Chem—Samples will be analyzed for General Parameters as listed in Table 2. j CCWTMP QAPP 26 May 30,2008 Revision 2 Table 7.Toxicity Investigation Monitoring Sites and Sampling Frequency Subwatershed Site ID Reach Site Location GPS Coordinates Tox Pests/PCBs Gen Chem Lat Long Sediment Toxicity Investigation 02_PCH 2 Calleguas Creek Northeast Side Of Highway 1 341119 -119.0818 1 1 1 Calleguas Bridge 9A_HOWAR 9A Conejo Creek At Howard Road Bridge 34.1931 -119.0025 1 1 1 Water Toxicity Investigations Tox Pests/PCBs Gen Chem j 10_GATE 10 Conejo Creek Hill Canyon Below North Fork 34.2178 -118.9281 5 5 5 Conejo Of Conejo Creek 13—BELT 13 Conejo Creek South Fork Behind Hill Canyon 34.2078 -118.9194 4 4 4 Belt Press Building 1 Includes two wet events per site. Tox—Samples will be analyzed for toxicity,OP,triazine,and pyrethroid pesticides in water and toxicity,OP and pyrethroid pesticides in sediment as listed in Table 2 Pests/PCBs—Samples will be analyzed for OC pesticides and PCBs as listed in Table 2. Gen Chem—Samples will be analyzed for General Parameters as listed in Table 2. CCWTMP QAPP 27 May 30,2008 Revision 2 0 Table 8. CCWTMP Land Use Monitoring Sites and Sample Frequency Sub Site GPS Coordinates Pests/ Gen watershed Site ID Reach Type' Site Location Lat Long PCBs' Nutrients Metal Chem' Mu 01T_0DD2_DCH 1 Ag Duck Pond/Mugu/Oxnard Drain#2 S.of Hueneme 34.1395 -119.1183 6 6 6 6 -Lagoon 04D_WOOD 4 Ag Agricultural Drain on E.Side of Wood Rd N.of 34,1707 -119.0960 6 6 6 6 Revolon Revolon 05D_SANT_ 5 Ag Santa Clara Drain at VCWPD Gage 781 prior to 34,2425 -119.1114 6 6 NA 6 Slough VCWPD confluence with Beardsley Channel 04D—VENTURA 4 Urban Camarilo Hills Drain at Ventura Blvd and Las Posas 34.2161 -119.0675 6 6 6 6 Rd at VCWPD Gage 835 Calleguas 02D_BROOM 2 Ag Discharge to Calleguas Creek at Broome Ranch Rd. 34.1434 -119.0711 NA NA 6 NA 9BD_GERRY 9B Ag Drainage ditch crossing Santa Rosa Rd at Gerry Rd 34.2369 -118.9473 6 6 6 6 9BD_ADOLF 9B Urban Urban storm drain passing under N.side of Adolfo 34.2148 -118.9951 6 6 6 6 Conejo Rd approximately 300 meters from Reach 9B 13_SB_HILL 13 Urban South Branch Arroyo Conejo on S.Side of W 34.1852 -118.9074 6 6 NA 6 Hillcrest Las Posas 06T_FC_BR 6 Ag Fox Canyon at Bradley Rd-just north of Hwy 118 34.2646 -119.0115 6 6 NA 6 07D HITCH 2nd corrugated pipe discharging on north side of _ _ LEVEE 2 7 Ag Arroyo Simi flood control levee off of Hitch Blvd just 34.2714 -118.9205 6 6 NA 6 beyond 1st power pole. i Arroyo Simi 07D_CTP 7 Urban Flood control channel in Country Trail Park 34.2646 -118.9072 6 6 NA 6 07T_DC_H 7 Urban Dry Canyon at Heywood Street 34.2682 -118.7599 6 6 NA 6 O7T_LL_RC 7 Open Las Uajas at Road Crossing 34.3005 -118.6806 NA 6 NA 6 Ag=Agricultural Land Use Site Urban=Urban Land Use Site Open=Open Space Land Use Site(Established for the nutrients investigation monitoring) NA—Not Analyzed 1 Includes two wet events per site. Station IDs indicated in bold type represent CCWTMP sites that correspond to sites identified in the Ventura County Irrigated Lands Group QAPP(LWA 2006). 02D_BROOM will be sampled by the VCAILG and will be considered in the CCWTMP Annual Report. Pests/PCBs—Samples will be analyzed for Organochlorine Pesticides and PCBs, OP,triazine,and pyrethroid pesticides as listed in Table 2. Nutrients—Samples will be analyzed for Nutrients as listed in Table 2. Metals—Samples will be analyzed for Metals as listed in Table 2. Gen Chem—Samples will be analyzed for General Parameters as listed in Table 2. CCWTMP QAPP 28 May 30,2008 Revision 2 ?Jt C; MADER (if HITC I 113 07 06 zsz 6 S�?I.11S 11 cis, cElrrR ,'297 0 B `DGLF 10_GATE t0 12_PARK N 12 o _BELT 13 03+_L1N('v A` OWAR 04 1, 00 03 04 12 1, �J ',2.P 01 RR-B �•i~ cif' a9' 0 2.5 5 moo. l;�rJ t I IMiles <. CCWTMP Compliance Monitoring Sampling Sites - Receiving Water cn. Notes: 0 o Subwatersheds 1.Toxicity DL analysis includes-Aquatic Toxicity N N �, Toxicity, OCs.Nutrients,and I:I�tals TMDL Site t11 A9 Y o Arroyo Simi and OP.Pyrethroid,and Triazine Pesticides CD Y I Les Paws Toxicity.OCs,and Nutrients TMDL Sampling Site ao � '. � y P '� 2.OCs TMDL analysis includes-c�C Pesticides and PCBs ® Calleguas Mugu Lagoon Nutrients TP:IDL Sampling Site 3.Nutrients TMDL analysis includes-Nitrogen and Phosphorus Compounds Conejo ® Revolon Slough — I'-9ajor Drainages 4.Metals TMDL analysis includes-Cu,Ni,Hg.Se,and 2n I'•,1.-,jorpo-lJs Larry April,200: Figure 3. CCWTMP Compliance Monitoring Sampling Sites— Receiving Water 126 p 21 s 09 07 HITCH „6 07 3 OB 11 05 06—SOMIS 23 10 9B 12 wo f 96_ADOLF 13 M 04 Op 03_UNIV 9A 03 02 23 101 27 J�iJ e�ey 23 0 2.5 5 va I I I Miles CD v CCWTMP Compliance Monitoring Receiving Water Sampling Sites - Freshwater Sediment Subwatersheds Notes: N w Arroyo Simi Las Posas A Toxicity and OCs TMDL Sampling Site 1.Toxicity TMDL analysis includes-Sediment Toxicity and OP -- 0 OCs TMDL Sampling Site and Pyrethroid Pesticides Calleguas Mugu Lagoon 2.OCs TMDL analysis includes-OC Pesticides and PCBs ii Con o Revolon Slough _ Major Drainages e1 Major Roads LarrV Walker Associates July,2006 Figure 4. CCWTMP Compliance Monitoring Receiving Water Sampling Sites- Freshwater Sediment n ,$ 2 D � za C-8 07 HITC 06 6_SOMIS 98 10 w 96 ADOLF 12 — 33 03__UNIV r 23 r� G2 J i F C :a CP"A �Go 0 2.5 5 Miles ( _ CCWTMP Compliance Monitoring Receiving Water Sampling Sites- Freshwater Fish Tissue 0 0 Subwatersheds Notes: N' ° A Toxicity,OCs,and Metals TMDL Sampling Site 1.Toxicity TMDL analysis includes-Chlorpyrlfos Arroyo Simi Las Posas �` p g 2.OCs TMDL analysis includes-OC Pesticides and PCBs - Calleguas Mugu Lagoon OCs TMDL Sampling Site 3.Metals TMDL analysis includes-Hg and Se Major Drainages Conejo Revolon Slough Major Roads 1- Larry Walker Associates Ai3ril.2008 Figure 5. CCWTMP Compliance Monitoring Receiving Water Sampling Sites— Freshwater Fish Tissue • • i 23-, A �u 06D_MOOR n7D_SIk, 07 :.. 9B 10D_HIL 12 PQ D LAMA 13 u3 U °•2 a Jl 0 !i 2.5 5 sae I I I Miles CD T .,< CCWTMP Compliance Monitoring Sampling Sites - POTW Effluent in-. W 0 o Subwatersheds dotes: ^, N Toxicity,OCs,and Metals TMDL Sampling Site 1.Toxicity TMDL analysis Includes-OP,Pyrethrold.and Las Pasas co 1 A Toxicity and OCs TMDL Sampling Site Tri s T Pesticides y �; Mugu Lagoon 2.Met TMDL analysts includes-OC Pesticides and PCBs rro o imi Calleguas Major Drainages 1 9 3.Metals TMDL analysis Includes-Cu.Ni.Hg,Se,and Zn Conejo Revolon Slough Major Roads Larry Walker Associates i Figure 6. CCWTMP Compliance Monitoring Sampling Sites— POTW Effluent • s • CCWTMP Compliance Monitoring Sampling Zones - Mugu Lagoon Sediment r 01_BPT_14 z� 0 01 BPT 15 w 1_BPT_06 I 01—SG-74 01_BPT_03 Notes. MUgU Lagoon Land Cover N 1.Sedirrrent sampling Zone an alp lis for Toxicity ai's,and f9etals TP,iDLs includes Sediment Toxicity. -JP.01.:,.and Pyrethroid Pesticides, AGRICULTURE PCBs.and Metals. -� 2.The tidal extent pees nted repr Ants the suarrdal area4 Fn o BEAU'N;DUNE Pv1UDFLAT Sediment sampling zones are Icc.ater� in the suartr.lal dueas so ry N OPEN SPACE that data could be compared to the: alifornia raiment ).0 ality 0o objectives. Because of shitting shoals and land bars,sediment co DEVELOPED samples will be collected from the deepest part of the channel in p 0.25 ta.` A-'liles the sampling zones instead of reot.cupynng stations bused can MARSHLAND I i GFS coordinates. Larry Vllalka_r As::.omt<-: April.2008 Figure 7. CCWTMP Compliance Monitoring Sampling Zones— Mugu Lagoon Sediment i D i ; 111h1 1 r Western Lagoon Fish Tissue '' .•. Sample Collection Zone Central Lagoon t Fish Tissue •. #.# ■ Sample Collection Zone E ♦ ♦i i z C. R#• _y � y Motes. Mugu Ott Land COY!! N t.Fish Tissue Sampling Zone analysis for OCs and Metals TWDLs includes-OC Pesticides, PCBs,Hg.and Se. AGRICULTURE 2.The tidal extent presented represents potential high tide conditions. Fish tissue sample collection will likely occur during this phase of tide to avoid disturbing marine mammals BEACHIDIJNE/MUDFLAT and for owe of sample collection. 3.Samples collected in the Central Lagoon Fish Tissue Sample Collection Zone will target OPEN SPACE spades to allow+for evaluation of potaotal irnpscts to huftw health onel Aehaitive bird species. m 4_Samples collected In the Western Lagoon Fish Tissue Sample Collection Zama will target DEVELOPED spades to allow for evaluation of potential impacts to sensitive bird specles. 0 0 N a MARSHLAND 0 0.25 O's Miles tarry waikerAssodame April.2006 0 00 Figure 8. CCWTMP Compliance Monitoring Sampling Zones— Mugu Lagoon Tissue C) C-) 50 23 ,26 a 00 m 3 f 06 t1 06 23 96 10 10—GATE 1; BELT 12 9A 04 03 I 02 , o, 27 2_PGH y 23 P°9 0 2.5 5 py I I I Miles V Z7 � <.� CCWTMP Toxicity Investigation Receiving Water Sampling Sites - Water and Sediment o Subwatersheds Notes: ^' C:) Arroyo Simi Las Posas Water Sampling Site 1.Water analysis includes-Aquatic Toxicity and OP.Pyrethroid. CD and Triazine Pesticides O° ® caileguas Mugu Lagoon Sediment Sampling Site 2.Sediment anal y sis includes-Sediment Toxicity t y and OP and Conejo ® Revolon Slough Major Drainages Pyrethroid Pesticides Major Roads Larry Walker Associates July,2006 Figure 9. CCWTMP Toxicity Investigation Receiving Water Sampling Sites—Water and Sediment C-) 0 p� D � . 08 0 C17D HITCH 07f-LL-RC LEVEE-2 06 V 07D CTP 07T-DC-H 23 D_GERRY tt 10 _ 96 04D ENTURA 9BD_ADOLF 12 w 13 04 04D I.-VOOD 13 SB HILL 0 01T ODD 2 � DC H ?' goy Q 2.5 5 t t Miles CD y. w CCWTMP Land Use Sampling Sites Notes: 0 CD Subwatersheds 0 Open Space Sampling Site 1.Agricultural and Urban Discharge Sampling Site analysis for Toxicity,OCs, ^) o Arr o Simi �— -` Las Posas A Agricultural Discharge Sampling Site Metals and Nutrient TMDLs includes-OP.OC.Pyrethroid,and Triazine CD L�__ ©Y I 3 Pesticides.PCBs.Cu.Ni,Hg,Se.Zn and Nitrogen and Phosphorus Compounds. 0 Calleguas Mugu Lagoon U Urban Discharge Sampling Site 2.Open Space Sampling Site analysis for Nitrogen and Phosphorus Compounds. * Metals TMDL Sampling Site 3.Agricultural and Urban Discharge Sampling Sites are generally located at a Conejo Revolon Slough point where water from a representative group of similar land uses discharges ---- Moor Drainages to one of the subwatershed reaches. rylamor Roads Larne�Nalker Associates April.2008 Figure 10. CCWTMP Land Use Sampling Sites Sampling Schedule Dry weather water column samples shall be collected quarterly,except for the Metals TMDL which will be monthly for the first year. Table 9 presents the sampling schedule for quarterly and triennial monitoring. The sampling schedule was established in an attempt to characterize months in which toxicity of unknown causes was observed in previous studies. Dates will be finalized during coordination with other monitoring efforts (NPDES POTW and Stormwater monitoring and the Ag Waiver program) in order to minimize duplication of effort and to develop a representative data set. All efforts will be made to include two additional wet weather water sampling events for toxicity and selected organic constituents between October and April during targeted storm events, as described below. Collection of land use and POTW samples will coincide with compliance monitoring and wet weather sampling events as outlined in Table 9. Streambed sediment samples in freshwater reaches and Mugu Lagoon will be collected during the summer(June through August) to coincide with a return to base flow conditions and to be consistent with similar efforts in California. Collection of streambed sediment samples may be postponed if storms resulting in scouring of sediments occur late into the spring. The monitoring schedule will be revised if it does not appropriately characterize conditions in the watershed. Any changes with regard to the sample schedule will be determined through discussions between the Project Manager, Project QA Manager, and field staff and will be documented in the Annual Report. Table 9.Compliance,Toxicity, and Nutrient Investigation Monitoring Schedules, Subwatershed Station IDs Reach Station Type By TMDL Month2 Tox Ocs Nutrients Meta13 Jan Apr Jul Oct 01_RR_BR 1 C C C, I C W W W W 01_BPT_3 1 C C C W W W,S W 01_BPT_6 1 C C C W W W,S W Mugu Lagoon 01_BPT_14 1 C C C W W W,S W 01_BPT_15 1 C C C W W W,S W 01_SG_74 1 C C C W W W,S W Central Lagoon 1 C C T Western Arm 1 C C T Revolon 04 WOOD 4 C C C, I C W W W, S,T W 05_CENTR 5 C, I W W W W 02_PCH 2 1 C W W W,S W Calleguas 03_UNIV 3 C C C, I C W W W,S,T W 9A_HOWAR 9A I C W W W,S W 9B_ADOLF 9B C C C, I W W W,S,T W Conejo 10 GATE 10 1 C, I W W W W 12 PARK 12 C W W W W 13 BELT 13 1 C W W W W Las Posas 06_SOMIS 6 C C C, I W W W,S,T W 07 HITCH 7 C C C, I W W W,S.T W Arroyo Simi 07_MADER 7 C, I W W W W 07T_LL_RC 7 1 W W W W Station Type: C indicates compliance monitoring site; I indicates toxicity or nutrient investigation site Media Type: W indicates water sample; S indicates sediment sample;T indicates tissue sample 1 Collection of land use and POTW samples will coincide with compliance monitoring and wet weather sampling. 2 All attempts will be made to include two wet weather sampling events during the wet season(October through April) for aquatic toxicity and OC,OP,triazine, nutrients,and pyrethroid pesticides and PCBs,and metals outlined in Table 2. 3 Metals water quality sampling at 01—RR—BR,04—WOOD,and 03_UNIV will be monthly for the first year. �rr CCWTMP QAPP 37 May 30,2008 Revision 2 Should measurable precipitation occur during the seven days prior to a scheduled dry weather event,stream gage data within the watershed will be reviewed to determine if flow rates have returned to a pre-storm level. If flow rates have returned to a pre-storm level, the sampling event may be conducted as scheduled. If flow rates have not retumed to a pre-storm level the sampling event shall be rescheduled to allow for flow rates to return to a pre-storm level or for at least seven days without measurable precipitation prior to sampling, whichever is a shorter time period. All efforts will be made to collect two wet weather samples during the wet season (October through April). Sufficient precipitation is needed to produce runoff, mobilize contaminants, and increase stream flow. The decision to sample a storm event will be made in consultation with weather forecasting information services and after a quantity of precipitation forecast(QPF) has been determined. Wet weather samples will be collected after a targeted storm event, defined as a storm that produces at least 0.5 inches of precipitation. Peak flows shall be targeted, to the extent practicable. Appendix C contains an attachment outlining the procedures for initiating wet weather sampling. Classification of Measurements Because the CCWTMP is intended to be a long term monitoring program, data that are not successfully collected during a specific sample event will not be recollected at a later date. Rather, subsequent events conducted over the course of the program will provide a data set of sufficient size to appropriately characterize conditions at individual sampling sites and in the watershed in general. For this reason, most of the data planned for collection cannot be considered absolutely critical, and it is difficult to set a meaningful objective for data completeness. If, however,sampling sites do not allow for the collection of enough samples to provide representative data due to conditions (i.e., no flow) alternate sites will be considered. Please see Element 14(Quality Control)for a discussion on data completeness. All information collected as outlined in the QAPP will be reported. Validation of Non-Standard Methods For non-standard sampling and analysis methods, sample matrices, or other unusual situations, appropriate method validation study information shall be documented to confirm the performance of the method for the particular need. The purpose of this validation is to assess the potential impact on the representativeness of the data generated. Such validation studies may include an initial demonstration of capability, split samples sent to another lab for analysis by a standard method, or round-robin studies performed by USEPA or other organizations. If previous validation studies are not available, some level of validation study will be performed during the project and included as part of the annual report. 11. Sampling Methods All samples will be collected in a manner appropriate for the specific analytical methods to be used. Proper sampling techniques must be used to ensure that samples are representative of environmental conditions. Field personnel will adhere to established sample collection protocols in order to ensure the collection of representative and uncontaminated (i.e., contaminants not introduced by the sample handling process itself)samples for laboratory analyses. Deviations from the standard protocols must be documented. Standard operating procedures (SOPS)for collection �—� of samples are provided in Appendix C and summary descriptions are provided below. CCWTMP QAPP 38 May 30,2008 Revision 2 "Iew Surface water and sediment samples will be collected for chemical analyses and biological toxicity testing as listed in Table 2. Tissue samples will be collected for chemical analyses as listed in Table 2. Sampling for additional constituents may be required in the future, dependent on additional TMDLs, the results of Toxicity Identification Evaluations (TIEs), or other unforeseen reasons. In these cases, the QAPP will be amended to provide adequate sampling and analytical guidance, as necessary. Field Protocols Briefly, the key aspects of quality control associated with sample collection for eventual chemical and toxicological analyses are as follows: • Field personnel will be thoroughly trained in the proper use of sample collection gear and will be able to distinguish acceptable versus unacceptable water samples in accordance with pre-established criteria. • Field personnel will be thoroughly trained to recognize and avoid potential sources of sample contamination (e.g., engine exhaust, ice used for cooling). • Sampling gear and utensils which come in direct contact with the sample will be made of non-contaminating materials(e.g., borosilicate glass, high-quality stainless steel and/or Teflon"v, according to protocol)and will be thoroughly cleaned between sampling stations according to appropriate cleaning protocol (rinsing thoroughly with laboratory reagent water at minimum). • Sample containers will be of the recommended type and will be free of contaminants (i.e., pre-cleaned). • Conditions for sample collection, preservation and holding times will be followed. Field crews (2 persons per crew, minimum)will only be mobilized for sampling when weather conditions and flow conditions are considered to be safe. For safety reasons, sampling will occur during daylight hours, when possible. Sampling events should proceed in the following manner: 1. Before leaving the sampling crew base of operations, confirm number and type of sample containers as well as the complete equipment list. 2. Proceed to the first sampling site. 3. Fill-out the general information on the field log sheet. 4. Collect the samples indicated on the event summary sheet in the manner described in the QAPP. Collect additional volume and blank samples for field-initiated QA/QC samples, if necessary. Place filled sample containers in coolers and carefully pack and ice samples as described in the QAPP. Using the field log sheet, confirm that all appropriate containers were filled. 5. Collect field measurements and observations, and record these on the field log sheet. 6. Repeat the procedures in steps 3,4,and 5 for each of the remaining sampling sites. 7. Complete the chain of custody forms using the field log sheets. 8. After sample collection is completed,deliver and/or ship samples to appropriate laboratory. Water Sample Collection The various monitoring programs in the CCW collect grab and composite samples. Table 10 summarizes the sample collection requirements of the various programs. The method by which each program collects samples for specific constituents is indicated in the NPDES permit or in the `r CCWTMP QAPP 39 May 30,2008 Revision 2 program's monitoring plan. A grab sample is an individual sample. A composite sample is mixture of grab samples collected over a period of time either as time or flow weighted. A time weighted composite is created by mixing multiple aliquots collected at specified time intervals. A flow weighted composite is created by mixing multiple aliquots collected at equal time intervals but then mixed based on flow rate. Table 10. Sample Collection Requirements of Monitoring Programs in the CCW Program Discharge Sites' Receiving Water Sites POTWs Flow and Time Weighted Composite2 and Grab3 Grab Stormwater Program Flow weighted composite2 and Grab3 Flow weighted composite2 and Grab3 Mugu Stormwater Program Flow weighted composite2 and Grab3 No sites VCAILG Ag Waiver Grab Grab Program 1 Discharge sites include POTW influent and effluent and agricultural and urban discharge sites. 2 Effluent samples are collected as flow-weighted composites and influent samples are collected as time-weighted. 3 Constituents with relatively short hold times(e.g.,coliform,E.coli,etc.)and those found to be misrepresented by collection through automated composite samplers or use of tubing are collected as grabs. Composite samples are generally considered to be more representative of a given time period and varying conditions over that time period, whereas grab samples represent an instant in time. Because composite samples are more representative of a given time period they are generally used to develop an understanding of pollutant loadings. In the case of TMDL monitoring, allocations in water are primarily set as concentrations which are considered over varying averaging periods (1 hour,4-day, and 30-day). A composite sample collected over the averaging period timeframe would allow for a direct comparison to allocations. However, there are varying averaging periods for the same constituents that would require multiple composite samples and there are real logistical and hold time issues faced in collection of composites over a 4 or 30-day period. Given the implementation schedules for the Nutrients, Toxicity, and OCs TMDLs are 7, 10,and 20 years, respectively, the frequency of monitoring outlined in the CCWTMP, and the additional monitoring conducted by other programs in the watershed, it is expected that a range of conditions will be evaluated and sufficient data will be available to answer the monitoring questions posed in Element 5 (Problem Definition/Background)without collection of composite samples at this time. Efforts will be made to compare CCWTMP collected grab samples to composites samples collected by other programs in the watershed. This will allow for an evaluation of how data collected using different techniques varies under different conditions. Grab samples will be collected at approximately mid-stream, mid-depth at the location of greatest flow(where feasible)by direct submersion of the sample bottle. This is the preferred method for grab sample collection; however, due to monitoring site configurations and safety concerns, direct filling of sample bottles may not always be feasible, especially during wet events. Monitoring site configuration will dictate grab sample collection technique. Grab samples will be collected directly into the appropriate bottles whenever feasible (containing the required preservatives as outlined in Table 11). Clean, powder-free nitrile gloves will be worn while collecting samples. In the event that a peristaltic pump and priority-cleaned silicone and Teflon"' tubing are used as a last resort to t collect samples (i.e., due to unsafe conditions during wet events), the sample collection tubing and `r CCWTMP QAPP 40 May 30,2008 Revision 2 CW the sample bottle and lid shall come into contact only with surfaces known to be clean,or with the water sample. Standard operating procedures(SOPs)for collection of surface water samples are provided in Appendix C. The potential exists for monitoring sites to lack discernable flow. The lack of•discemable flow may generate unrepresentative data. To address the potential confounding interference that can occur under such conditions, sites sampled through the CCWTMP should be assessed for the following conditions and sampled or not sampled accordingly: • Pools of water with no flow or visible connection to another surface water body should NOT be sampled. The field log should be completed for non-water quality data(including date and time of visit) and the site condition should be photo-documented. • Flowing water(i.e., based on visual observations,flow meter data,and a photo- documented assessment of conditions immediately upstream and downstream of the sampling site)site SHOULD be sampled. It is the combined responsibility of all members of the sampling crew to determine if the performance requirements of the specific sampling method have been met, and to collect additional samples if required. If the performance requirements outlined above or documented in sampling protocols are not met, the sample will be re-collected. If contamination of the sample container is suspected, a fresh sample container will be used. The Project Manager will be contacted if at any time the sampling crew has questions about procedures or issues based on site-specific conditions. Sediment Sample Collection — Freshwater Reaches Collection of in-stream sediment samples for chemical analysis and toxicity testing shall be conducted according to methods developed by the USGS and outlined in Guidelines for Collecting and Processing Samples of Stream Bed Sediment for Analysis of Trace Elements and Organic Contaminants for the National Wafer Quality Assessment Program(1994). Sediment sampling sites will encompass a section of the reach approximately 100 meters in length upstream from water-column sampling stations. However, this definition may vary based on conditions at each sampling station. Sediment sampling stations should contain 5 to 10 wadeable depositional zones. Depositional zones are defined as locations in streams where the energy regime is low and fine- grained particles accumulate in the stream bed. Depositional zones include areas on the inside bend of a stream or areas downstream from obstacles such as boulders, islands, sand bars, or simply shallow waters near the shore. The purpose of selecting numerous wadeable depositional zones is to collect a representative sample of each reach. Each depositional zone identified at a sampling station shall be subsampled several times and composited in the field for chemical analysis, or at the lab for toxicity analysis. The number of subsamples collected at each depositional zone shall be based on the size of the zone. If all of the depositional zones within a reasonable distance of the water sampling station have dried, samples should be collected from a partially wetted zone. Wetted zones include areas near the active stream channel. Sediment samples will be collected from the top two to three centimeters (cm) of sediment using CCWTMP QAPP 41 May 30,2008 Revision 2 pre-cleaned stainless steel trowels. Collection of sediments in the top two to three cm is a common approach to conducting sediment sampling for the purpose of sediment toxicity testing. This approach was used in sediment toxicity studies conducted by the Southern California Coastal Water Research Project(SCCWRP) Bight Program and the State Water Resources Control Board Bay Protection and Toxic Cleanup Program (BPTCP), which led to the sediment toxicity listing in Mugu Lagoon. All sediment samples shall be collected directly into a clean polyethylene bag, mixed, and then placed into the appropriate jars as outlined in Table 11. SOPs for collection of sediments in the freshwater portion of the watershed are provided in Appendix C. The Ventura County Watershed Protection District shall be contacted at least one month prior to monitoring to determine if there is a potential for sediment removal activities to affect sediment sample collection. Sediment Sample Collection — Mugu Lagoon Sediment samples from Mugu Lagoon will be collected in subtidal areas to allow the data to be compared to the California Sediment Quality Guidelines, which are currently under development. Divers will collect sediments for chemical and toxicity analysis at all stations in situ. This process will eliminate the need for multiple grab sets from the small sampling boat and be more efficient for the amount of sediment needed for analysis. In addition, diver sampling will allow for more precise sediment collection at the station location. In situ sediment samples will be collected directly with the sample storage and transport container,eliminating the potential for metal contamination from grab samplers, and reduce handling and transferring otherwise required after sample collection. If the optional monitoring is initiated by the Management Committee as described in Element 6 (Project Description) benthic samples for infaunal community analysis will be collected in conjunction with the sediment and toxicity sampling throughout Mugu Lagoon. In the central lagoon and eastern arm, benthic sample collection will be accomplished using a 0.1-m2, chain- rigged Van Veen grab deployed from the small sampling boat. One Van Veen grab will be collected at each station in the eastern arm of the lagoon. Once on station, the Van Veen grab will be lowered at a rate not to exceed 1 m/sec to ensure proper deployment. On the bottom, moderate cable tension will be maintained to prevent the sampler from toppling. The grab will be slowly raised until free from the bottom to ensure that an acceptable sample is collected.The grab will continue to be slowly raised until the grab breaks the surface and is safely retrieved. If the western arm or other areas are not accessible to a boat large enough to deploy the Van Veen grab, benthic infauna samples will be collected by divers. At these stations a diver will place a box quadrant with the same surface area as the Van Veen on the bottom, and sediments will be carefully removed, so that no sediments or organisms are lost. Sediments within this quadrant will be excavated to a depth consistent with that collected by the Van Veen grab. As discussed previously, the frequency for sampling Mugu Lagoon sediment is predicated on the relatively slow sedimentation rates in the several parts of the lagoon. In an attempt to gain an understanding of sedimentation rates at the sampling sites, transects may be established at sites where feasible (i.e., sites where transects will not be swept away during high flow events). The number and location of transects will be determined in the field during the first event in consultation with Navy environmental staff familiar with the lagoon. SOPs for collection of sediments in Mugu Lagoon are provided in Appendix C. CCWTMP QAPP 42 May 30,2008 Revision 2 Fish Tissue Sample Collection — Freshwater Reaches According to USEPA guidance (2000), the target fish species for sample collection in inland freshwaters should be the largest individual fish captured from both 1)the highest trophic level sampled (e.g., predatory species) and 2) a bottom feeder. The USEPA guidance document lists bass, crappie, walleye, yellow perch, common carp, suckers, catfish, and trout among its recommended target species for inland freshwaters. Fish species collected in the past in the freshwater portion of the CCW include goldfish,fathead minnow, black and brown bullhead, arroyo chub, mosquito fish, and green sunfish. All attempts will-be made to collect fish to meet the requirements of the USEPA guidance; however, other species not listed above may be collected if they are species known to be consumed by people in the CCW, are within the size range typically kept for consumption, and are predatory or bottom-feeding species. Fish will be collected using gear appropriate to the collection site and the species being targeted. Sampling gear may include electrofishing boats, backpack electrofishers, seine nets, gill nets, trap nets, hook and line,or other equipment as required. Larger species are collected as individuals for filleting to allow for an evaluation of human health risks. Small species are collected as bulk samples as the whole body tissue is analyzed which will potentially allow for an evaluation of ecological risk. Tissue monitoring will involve the field-collection of fish and the obtaining and storing of tissue samples to be analyzed for trace levels of target organics, using protocols detailed in CDFG's (2000)standard operating procedures for tissue sample collection and preparation. Appendix C provides a summary of CDFG protocols and protocols for collection of tissue samples. Fish Tissue Sample Collection — Mugu Lagoon ti*-- For Mugu Lagoon, species with the potential for human and wildlife consumption will be targeted. As in freshwater systems, estuary fish species compositions can be variable from year-to-year. For this reason, it is proposed that target species in the estuary are selected based on the local abundances and fish size at the time of field collection. Fish targeted to evaluate potential impacts to human health will be limited to species more commonly consumed by humans. Predatory species likely to occur in the lagoon include kelp bass, sand bass, spotted bay bass, croaker and halibut. Benthic-feeding fish species are likely to include diamond turbot, spotted turbot, or speckled sand dab. Tissues analyzed will be based on most common preparation for the selected fish species, so for larger species such as bass and halibut, muscle tissue will be filleted and analyzed with skin on, while smaller species such as sand dab,will be cleaned with head, guts and tails removed before analysis(SWRCB, 1998). To further assess potential human impacts, tissues from resident California or bay mussels will also be evaluated. To evaluate potential wildlife impacts to sensitive bird species, a common schooling fish prey species will also be targeted for tissue analysis. As with other estuary species, abundances and species composition can vary year-to-year; however, species likely to be present include topsmelt, slough anchovies, deep body anchovies, or shiner surfperch. Field crews will target the most abundant prey species during each sampling event. Prey species will be analyzed whole-body. Fish for tissue analysis for human and wildlife consumption will be collected in the central portion of Mugu Lagoon by 16-ft otter trawl. Tows will be conducted until a sufficient number of fish are caught for analysis purposes. Fish for tissue analysis for wildlife consumption will be collected in the western arm of Mugu Lagoon by seine or trap net. Because of limited access and CCWTMP QAPP 43 May 30,2008 Revision 2 maneuverability in the western arm, it is unlikely that it will be possible to use the otter trawl in the area. Actual collection techniques will be developed in the field based on what works at the time. Fish sampling in this area will be limited to schooling species that provide forage for local bird species. Because of local conditions and abundances,the most abundant prey fish species collected in the western arm may differ from the most abundant species collected in the eastern arm. A summary of protocols for field-collection of fish and resident California muscles in the lagoon is also provided in Appendix C. Quality Control Sample Collection Quality control samples will be collected in conjunction with environmental samples to verify data quality. Quality control samples collected in the field include field blanks and duplicates. The frequency of quality control sample collection is presented in Element 14 (Quality Control). Field Measurements and Observations Field measurements (listed in Table 5)will be collected and observations made at each sampling site(water and sediment) after a sample is collected. Field measurements will include dissolved oxygen, temperature, conductivity, pH, turbidity, and flow. Measurements(except for flow)will be collected at approximately mid-stream, mid-depth at the location of greatest flow(if feasible)with a Hydrolab DS4 multi-probe meter, or comparable instrument(s). Field monitoring equipment must meet the requirements outlined in Table 5. Field measurements for sediment samples shall be collected from within one meter of the sediment. All field measurement results and field observations will be recorded on a field log sheet similar to the one presented in Appendix F. Flow will be estimated using a velocity meter and channel cross-sectional area, or will be estimated by other means at each sampling station after a sample is collected. Appendix C contains the flow measurement SOP. Regardless of measurement technique used, if a staff gage is present the gage height will be noted. If at any time the collection of field measurements by wading appears to be unsafe, field crews will not attempt to collect mid-stream, mid-depth measurements. Rather, field measurements will be made either directly from a stable, unobstructed area at the channel edge, or by using a telescoping pole and intermediate container to obtain a sample for field measurements and for filling sample containers. Use of sample collection methods other than the mid-stream, mid-depth method will be documented on the field log sheet. Field crews may not be able to measure flow at several sites during wet weather because of inaccessibility of the site. If this is the case,site inaccessibility will be documented on the field log sheet. The field sampling crew has primary responsibility for responding to failures in the sampling or measurement systems. Deviations from established monitoring protocols and this QAPP will be documented in the comment section of the field log sheet. If monitoring equipment fails, monitoring personnel will report the problem in the notes section of the field log sheet and will not record data values for the variables in question. Broken equipment will be replaced or repaired prior to the next field use. Data collected using faulty equipment will not be used for the CCWTMP. In addition to field measurements, observations shall be made at each sampling station and noted on the field log form. Observations will include color, odor, floating materials as well as .` observations of contact and non-contact recreation. CCWTMP QAPP 44 May 30,2008 Revision 2 12. Sample Handling and Custody Documentation Procedures The Project Manager is responsible for ensuring that each field sampling team adheres to proper custody and documentation procedures. Field log sheets documenting sample collection and other monitoring activities for each site will be bound in a separate master logbook for each event. Field personnel have the following responsibilities: • Keep an accurate written record of sample collection activities on the field log sheets. • Ensure that all field log sheet entries are legible and contain accurate and inclusive documentation of all field activities. • Note errors or changes using a single line to cross out the entry and date and initial the change. • Ensure that a label is affixed to each sample collected and that the labels uniquely identify samples with a sample ID, site ID,date and time of sample collection and the sampling crew initials. • Complete the chain of custody forms accurately and legibly. Field Documentation/Field Log Field crews will keep a field log book for each sampling event. The field log book shall contain a calibration log sheet, field log sheets for all sites, and appropriate contact information. The following items should be recorded in the field log for each sampling event: • Monitoring station location; • Date and time(s) of sample collection; • Name(s)of sampling personnel; • Sample depth; • Sample ID numbers and unique IDs for any replicate or blank samples; • QC sample type(if appropriate); • Requested analyses(specific parameters or method references); • Sample type, (i.e., grab); • The results of any field measurements(e.g., flow,temperature,dissolved oxygen, pH, conductivity, turbidity) and the time that measurements were made; • Qualitative descriptions of relevant water conditions(e.g., water color, flow level, clarity)or weather(e.g., wind, rain)at the time of sample collection; and, • A description of any unusual occurrences associated with the sampling event, particularly those that may affect sample or data quality. The field log will be scanned into a PDF and transmitted along with the Event Summary Report to the Project Manager within one week of the conclusion of each sampling event. Appendix F contains an example of the field log sheet. CCWTMP QAPP 45 May 30,2008 Revision 2 Container Labeling and Sample Identification Scheme All samples must be identified with a unique identification code to ensure that results are properly reported and interpreted. Samples will be identified such that the site, sampling location, matrix, and sample type (i.e., normal field sample or QC sample)can be distinguished by a data reviewer or user. Sample identification codes will consist of a site identification code, a matrix code, and a unique sample ID number assigned by the monitoring manager. The format for sample ID codes is CCWTMP-###-AAAA-M where: • CCWTMP indicates the sample was collected as part of the TMDL Monitoring Program. • ###-identifies-the sequentially numbered sample event. Sample events are numbered from 001 to 999 and will not be repeated. • AAAA indicates the unique site identification code assigned to each site. Site identification codes are provided in Table 6 through Table 8. • XXX identifies the sample number unique to a sample bottle collected for a single event. Sample bottles are numbered sequentially from 001 to 999 and will not be repeated within a single event. All sample containers will be pre-labeled before each sampling event to the extent practicable. Pre-labeling sample containers simplifies field activities, leaving only sample collection time and date and field crew initials to be filled out in the field. Custom labels will be produced using blank water-proof labels. This approach will allow the site and analytical constituent information to be entered in advance and printed as needed prior to each sampling event. Labels will be applied to the appropriate sample containers in a dry environment as labels usually do not adhere to wet bottles. The labels will not be applied to container caps. Container labels will contain the following information: • Program Name • Date • Analytical Requirements • Station ID • Time • Preservation Requirements • Sample ID • Sampling Personnel • Laboratory Conducting Analysis Sample Containers, Storage, Preservation, and Holding Times Sample containers must be pre-cleaned and certified free of contamination according to the USEPA specification for the appropriate methods. Sample container, storage and preservation, and holding time requirements are provided in Table 11. The analytical laboratories will supply sample containers that already contain preservative (Table 11), including ultra pure hydrochloric and nitric acid, where applicable. After collection, samples will be stored at 40C until arrival at the contract laboratory. `\r. CCWTMP QAPP 46 May 30,2008 Revision 2 Table 11. Sample Container,Volume, Initial Preservation, and Holding Time Requirements Parameter Sample Sample Immediate Processing Holding Time Container Volume and Storage Water Toxicity Initial Screening Follow-Up Testing F rric an ned 2 x 20 L Store at 40C 36 hourS2 Phase I TIE jerric Hardness polyethylene 250 mL Store at 40C,HNO3 180 days Total Suspended Solids(TSS) polyethylene 1 L Store at 40C 7 days Nitrate Nitrogen 48 hours Nitrite Nitrogen polyethylene 250 mL Store at 40C 48 hours Orthophosphate-P 48 hours Ammonia Nitrogen 28 days Total Phosphorus polyethylene 1 L H2SO4 and Store at 40C 28 days Organic Nitrogen 28 days Total Kjehdahl Nitrogen(TKN) polyethylene 500 mL H2SO4 and Store at 40C 28 days Copper,Nickel.Selenium,Zinc polyethylene 250 mL Store at 40C 48 Hours Mercury glass 250 mL Store at 40C 48 Hours Dissolved Organic Carbon polyethylene 250 mL Store at 40C 28 days Organics6-Dry Weather-PCBs,OPs,OCs, amber glass 3 x 1 L Store at 40C 7/40 days^ Triazines,and Pyrethroids Organics6-Wet Weather-PCBs,OPs,OCs, 4 x 0.5 Pyrethroids,and Triazines in water and PCBs, glass gallon Store at 40C 7/40 days4 OPs,OCs,and Pyrethroids in suspended sediment Sediment �- Toxicity Initial Screening 4-mil poly 2 L Follow-Up Testing bag L3 Store at 40C 14 days Phase I TIE g 20 L3 Bivalve Embryo 4"diameter 4 cores Store upright at 40C 14 days push core Benthic Macroinvertebrate Community Assessment glass 0.1 m3 10%formalin-seawater 72 hours Total Ammonia 28 days Percent Moisture 1 year Particle Size Distribution glass 2 x 8 oz jar Store at 40C 6 months Total Organic Carbon 28 days OrganicS6 1 years Metals6 6 months Tissue Organics and Metals6 and Percent Lipids teflon sheet 200 g Store on dry ice 1 year if frozen Mercury and Selenium in Bird Eggs teflon sheet 20g Store at 40C 1 year if frozen 1 Additional volume may be required for QC analyses. 2 Tests should be initiated within 36 hours of collection.The 36-hour hold time does not apply to subsequent analyses for TIES. For interpretation of toxicity results,samples may be split from toxicity samples in the laboratory and analyzed for specific chemical parameters.All other sampling requirements for these samples are as specified in this document for the specific analytical method.Results of these analyses are not for any other use(e.g.characterization of ambient conditions)because of potential holding time exceedances and variance from sampling requirements. 3 Sample volumes for follow-up testing and Phase I TIEs for sediments may change based on percent solids in previous samples. In addition,collection of sediment for follow-up testing and Phase I TIEs may change based on observations of toxicity in previous sampling events. 4 7/40=7 days to extract and 40 days from extraction to analysis. 5 One year if frozen,otherwise 14 days to extract and 40 days from extraction to analysis. 6 Organics and metals include pesticides, PCBs,and metals presented in Table 2. CCWTMP QAPP 47 May 30,2008 Revision 2 Sample Handling and Shipment The field crews will have custody of samples during each monitoring event. Chain-of-custody (COC)forms will accompany all samples during shipment to contract laboratories to identify the shipment contents. All water quality samples will be transported to the analytical laboratory by the field crew or by overnight courier. The original COC form will accompany the shipment, and a signed copy of the COC form will be sent, typically via fax, by the laboratory to the field crew to be retained in the project file. While in the field,samples will be stored on ice in an insulated container, so that they will be kept at approximately 4'C. Samples that must be shipped to the laboratory must be examined to ensure that container lids are tight and placed on ice to maintain the temperature between 4oC. The ice packed with samples must be approximately 2 inches deep at the top and bottom of the cooler, and must contact each sample to maintain temperature. The original COC form(s)will be double- bagged in re-sealable plastic bags and either taped to the outside of the cooler or to the inside lid. Samples must be shipped to the contract laboratory according to Department of Transportation standards. The method(s)of shipment, courier name, and other pertinent information should be entered in the"Received By"or"Remarks"section of the COC form. Coolers must be sealed with packing tape before shipping and must not leak. It is assumed that samples in tape-sealed ice chests are secure whether being transported by field staff vehicle, by common carrier, or by commercial package delivery. The laboratory's sample receiving department will examine the shipment of samples for correct documentation, proper preservation - and compliance with holding times. The following procedures are used to prevent bottle breakage and cross-contamination: • Bubble wrap or foam pouches are used to keep glass bottles from contacting one another to prevent breakage, re-sealable bags will be used if available. • All samples are transported inside hard plastic coolers or other contamination-free shipping containers. • The coolers are taped shut to prevent accidental opening. • if arrangements are not made in advance,the laboratory's sample receiving personnel must be notified prior to sample shipment. All samples remaining after successful completion of analyses will be disposed of properly. It is the responsibility of the personnel of each analytical laboratory to ensure that all applicable regulations are followed in the disposal of samples or related chemicals. Chain-of-Custody Form Sample custody procedures provide a mechanism for documenting information related to sample collection and handling. Sample custody must be traceable from the time of sample collection until results are reported. A sample is considered under custody if: • It is in actual possession. ,—• CCWTMP QAPP 48 May 30,2008 Revision 2 • It is in view after in physical possession. • It is placed in a secure area (accessible by or under the scrutiny of authorized personnel only after in possession). A COC form must be completed after sample collection and prior to sample shipment or release. The COC form, sample labels, and field documentation will be cross-checked to verify sample identification, type of analyses, number of containers, sample volume, preservatives, and type of containers. A complete chain-of-custody form is to accompany the transfer of samples to the analyzing laboratory. A typical chain-of-custody form is illustrated in Appendix F. Laboratory Custody Procedures Contract laboratories will follow sample custody procedures as outlined in the laboratory's Quality Assurance(QA) Manual. A copy of each contract laboratory's QA Manual is available at the laboratory upon request. Laboratories shall maintain custody logs sufficient to track each sample submitted and to analyze or preserve each sample within specified holding times. The following sample control activities must be conducted at the laboratory: • Initial sample login and verification of samples received with the COC form; • Document any discrepancies noted during login on the COC; • Initiate internal laboratory custody procedures; • Verify sample preservation (e.g., temperature); • Notify the Project Manager if any problems or discrepancies are identified; and, • Perform proper sample storage protocols, including daily refrigerator temperature monitoring and sample security. Laboratories shall maintain records to document that the above procedures are followed. Once samples have been analyzed, samples will be stored at the laboratory for at least 30 days. After this period, samples may be disposed of properly. 13. Analytical Methods Portable field meters will measure within specifications outlined in Table 12. Analytical methods, method detection limits (MDLs), and reporting limits(RLs) required for samples analyzed in the laboratory are summarized in Table 13. MDLs and RLs are discussed in more detail in this Element. For organic constituents, environmentally relevant detection limits will be used to the extent practicable. The MDLs and/or RLs listed in Table 13 for several OC pesticides (aldrin, alpha-BHC, chlordane, the DDTs, dieldrin and toxaphene) are higher than targets/allocations specified in the BPAs. However, the MDLs and/or RLs listed in Table 13 are lower than detection levels currently attainable at commercial laboratories using standard analytical techniques and represent best available limits. Additionally, the RLs for nitrate as N and total suspended solids (TSS) (0.1 mg/L and 1.0 mg/L, respectively)are higher than the RLs listed in the SWAMP QAPP. However, of the 1,690 nitrate as N data points available in the watershed 98% were detected data with less than 1% of detected data were detected below the RL of 0.1 mg/L proposed in the QAPP. Of the 15,065 TSS data available in the watershed 99% were detected data with only 2%of detected data below the RL of 1 mg/L proposed in the QAPP.A review of the available data does not suggest the reporting limits will led to a significant number of non-detect data. CCWTMP QAPP 49 May 30,2008 Revision 2 Table 13 includes constituents that were not identified in Table 2 as these constituents are typically analyzed along with a suite of constituents. The additional constituents listed in Table 13 are not considered critical and are above and beyond what are required to meet TMDL monitoring requirements. - Prior to the analysis of any environmental samples, the laboratory must have demonstrated the ability to meet the minimum performance requirements for each analytical method presented in Table 13. The initial demonstration of capability includes the ability to meet the project-specified Method Detection Limits and Reporting Limits, the ability to generate acceptable precision and accuracy, and other analytical and quality control parameters documented in this QAPP. Data quality objectives for precision and accuracy are summarized in Table 5. Laboratory SOPs are documented in Appendix E. Table 12.Analytical Methods and Project Reporting Limits for Field Measurements Parameter/Constituent Method Range Project RL Flow Electromagnetic -0.5 to+20 fUs 0.05 ft/s pH Electrometric 0—14 pH units NA Temperature High stability thermistor -5—50 OC NA Dissolved oxygen Membrane 0—50 mg/L _ 0.5 mg/L Turbidity Nephelometric 0—3000 NTU 0.2 NTU Conductivity Graphite electrodes 0—10 mmhos/cm 2.5 umhos/cm RL—Reporting Limit NA—Not applicable CCWTMP QAPP 50 May 30,2008 Revision 2 Table 13.Analytical Methods and Project Method Detection and Reporting Limits for Laboratory Analysis ParameterlConstituent Method' Units Project MDL Project RL Laboratory Analyses—Water Chronic(7-day) Ceriodaphia dubia EPA-821-R-02-013 and NA NA ' NA Toxicity EPA-600-4-91-002 Chronic(7-day)Americamysis bahia EPA-821-R-02-014 NA NA NA Toxicity Hardness SM 2340B mg/L 1 5 Total Suspended Solids(TSS) SM 2540D mg/L 0.5 1 Ammonia Nitrogen SM 4500-NH3 F mg/L 0.01 0.1 Nitrate Nitrogen 300.1 mg/L 0.01 0.1 Nitrite Nitrogen 300.1 mg/L 0.01 0.05 Organic Nitrogen Calculation mg/L NA NA Total Kiehdahl Nitrogen(TKN) 351.3 mglL 0.455 0.5 Total Phosphorus SM 4500-P C mg/L 0.02 0.1 Orthophosphate-P 300.1 mg/L 0.001 0.01 Organochlorine Pesticides2 Aldrin EPA 625(m)/8270C(m) ng/L 1 5 al ha-BHC EPA 625 m/8270C m n /L 1 5 beta-BHC EPA 625(m)I8270C(m) nglL 1 5 gamma-BHC(Lindane) EPA 625(m)/8270C(m) ng/L 1 5 delta-BHC EPA 625(m)/8270C(m) ng/L 1 5 Chlordane-alpha EPA 625(m)/8270C(m) ng/L 1 _ _ 5 Chlordane-gamma EPA 625(m)/8270C(m) ng/L 1 5 Cis-Nonachlor EPA 625(m)/8270C(m) ng/L 1 5 2,4'-DDD EPA 625(m)/8270C(m) nglL 1 5 2,4'-DDE EPA 625(m)18270C(m) ng/L 1 5 2,4'-DDT EPA 625(m)/8270C(m) ng/L 1 5 4,4'-DDD EPA 625(m)18270C(m) ng/L 1 5 4 4'-DDE EPA 625(m)/8270C(m) ng/L 1 5 4,4'-DDT EPA 625(m)18270C(m) ng/L 1 5 Dieldnn EPA 625(m)/8270C(m) ng/L 1 5 Endosulfan I EPA 625(m)18270C(m) ng/L 1 5 Endosulfan II EPA 625(m)18270C(m) ng/L 1 5 Endosulfan Sulfate EPA 625(m)/8270C(m) ng/L 1 5 Endrin EPA 625(m)/8270C(m) ng/L 1 5 Endrin Aldehyde EPA 625(m)/8270C(m) ng/L 1 5 Endrin Ketone EPA 625(m)18270C(m) nglL 1 5 Heptachlor EPA 625(m)/8270C(m) ng/L 1 5 Heptachlor Epoxide EPA 625(m)/8270C(m) ng/L 1 5 Methoxychlor EPA 625(m)/8270C(m) ng/L 1 5 Mirex EPA 625(m)/8270C(m) ng/L 1 5 Oxychlordane EPA 625(m)/8270C(m) ng/L 1 5 Heptachlor EPA 625(m)/8270C(m) ng/L 1 5 Toxaphene EPA 625(m)/8270C(m) ng/L 10 50 trans-Nonachlor EPA 625(m)/8270C(m) ng/L 1 5 PCBs Congeners EPA 625(m)18270C(m) ng/L 1 5 Aroclors3 EPA 625(m)/8270C(m) ng/L 10 _ 20 Continued on next page CCWTMP QAPP 51 May 30,2008 Revision 2 Table 13 (continued from previous page).Analytical Methods and Project Method Detection and Reporting Limits—Laboratory Analysis Parameter/Constituent Method' Units Project MDL Project RL Organophosphorus Pesticides Bolstar(Sulprofos) EPA 625(m)/8270C(m) ng/L 2 4 Chlorpyrifos EPA 625(m)/8270C(m) ng/L 1 2 Demeton EPA 625(m)/8270C(m) ng/L 1 2 Diazinon EPA 625(m)/8270C(m) nq/L 2 4 Dichlorvos EPA 625(m)/8270C(m) ng/L 3 6 Dimethoate EPA 625(m)/8270C(m) ng/L 3 6 Disulfoton EPA 625(m)/8270C(m) ng/L 1 2 Ethoprop(Ethoprofos) EPA 625(m)/8270C(m) ng/L 1 2 Fenchlorophos(Ronnel) EPA 625(m)/8270C(m) ng/L 2 4 Fensulfothion EPA 625(m)/8270C(m) ng/L 1 2 Fenthion EPA 625(m)/8270C(m) ng/L 2 4 Malathion EPA 625(m)/8270C(m) ng/L 3 6 Merphos EPA 625(m)/8270C(m) ng/L 1 2 Methyl Parathion EPA 625(m)/8270C(m) ng/L 1 2 Mevinphos(Phosddn) EPA 625(m)/8270C(m) ng/L 8 16 Phorate EPA 625(m)/8270C(m) ng/L 6 12 Tetrachlorvinphos(Stirofos) EPA 625(m)/8270C(m) nq/L 2 4 Tokuthion EPA 625(m)/8270C(m) ng/L 3 6 Trichloronate EPA 625(m)/8270C(m) ng/L 1 2 Pyrethroid Pesficides4 Allethrin 8270C(NCI) ng/L 0.5 2 Bifenthrin 8270C(NCI) ng/L 0.5 2 Cyfluthhn 8270C(NCI) ng/L 0.5 2 Cypermethrin 8270C(NCI) ng/L 0.5 2 Danitol 8270C(NCI) ng/L 0.5 2 Deltamethrin 8270C(NCI) ng/L 0.5 2 L-Cyhalothhn 8270C(NCI) ng/L 0.5 2 Permethrin 8270C(NCI) ng/L 0.5 2 Prallethrin 8270C(NCI) ng/L 0.5 2 Esfenvalerate 8270C(NCI) ng/L 0.5 2 Fenvalerate 8270C(NCI) ng/L 0.5 2 Triazines Ametryn EPA 625(m)/8270C(m) ng/L 5 10 Atraton EPA 625(m)/8270C(m) nq/L 5 10 Atrazine EPA 625(m)18270C(m) ng/L 5 10 Prometon EPA 625(m)/8270C(m) ng/L 5 10 Prometryn EPA 625(m)/8270C(m) ng/L 5 10 Propazine EPA 625(m)/8270C(m) ng/L 5 10 Secbumeton EPA 625(m)/8270C(m) ng/L 5 10 Simazine EPA 625(m)/8270C(m) ng/L 5 10 Simetryn EPA 625(m)/8270C(m) nq/L 5 10 Terbuthylazine EPA 625(m)/8270C(m) ng/L 5 10 Terbutryn EPA 625(m)/8270C(m) ng/L 5 10 Continued on next page CCWTMP LAPP 52 May 30,2008 Revision 2 Table 13(continued from previous page).Analytical Methods and Project Method Detection `�'► and Reporting Limits-Laboratory Analysis Parameter/Constituent Method' Units Project MOL Project RL Metals in Freshwater Copper 0.4 1.0 Nickel 0.2 0.5 Selenium EPA 200.8 ug/L 0.2 0.5 Zinc 0.1 0.5 Mercury EPA 1631 ug1L 0.0005 , 0.001 Metals in Seawater Copper 0.01 0.02 Nickel EPA 1640 u /L 0.01 0.02 Selenium um 0.01 0.02 Zinc 0.01 0.02 Mercury EPA 1631 ug1L 0.0005 0.001 Dissolved Organic Carbon in Seawater EPA 415.1 mg/L 0.1 0.2 Laboratory Analyses-Sediment Chronic(10-day)Eohaustorius estuarius EPA-600-R-94-025 NA NA NA Toxicity Chronic(10-Day)Hyalella azteca EPA-600-R-99-064 NA NA NA Toxicity 48-hour Bivalve Embryo Toxicity(Mytilus EPA-600-R-95-136 NA NA NA edulis or Crassostrea gigas) Benthic Macroinvertebrate Community NA NA NA NA Assessment Total Ammonia in Sediment SM 4500-NH3 F mg/wet kg 0.01 0.05 Percent Moisture EPA 160.3 % 0.1 0.1 Particle Size Distribution SM 260D um 0.02 0.04 Total Organic Carbon(TOC) EPA 9060A %Dry Weight 0.01 0.05 Organochlorine Pesticides Aldrin EPA 8270C(m) ng/dry g 1 5 alpha-BHC EPA 8270C(m) ng/dry g 1 5 beta-BHC EPA 8270C(m) ng/dry g 1 5 gamma-BHC(Lindane) EPA 8270C(m) ng/dry g 1 5 delta-BHC EPA 8270C(m) ng/dry g 1 5 Chlordane-alpha EPA 8270C(m) ng/dry g 1 5 Chlordane-gamma EPA 8270C(m) ng/dry g 1 5 Cis-Nonachlor EPA 8270C(m) ng/dry g 1 5 2,4'-DDD EPA 8270C(m) ng/dry g 1 5 2,4'-DDE EPA 8270C(m) ng/dry g 1 5 2,4'-DDT EPA 8270C(m) ng/dry g 1 5 4,4'-DDD EPA 8270C(m) ng/dry g 1 5 4,4'-DDE EPA 8270C(m) ng/dry g 1 5 4,4'-DDT EPA 8270C(m) ng/dry g 1 5 Dieldrin EPA 8270C(m) ng/dry g 1 5 Endosulfan I EPA 8270C(m) ng/dry g 1 5 Endosulfan II EPA 8270C(m) ng/dry g 1 5 Endosulfan Sulfate EPA 8270C(m) ng/dry g 1 5 Endrin EPA 8270C(m) ng/dry g 1 5 Endrin Aldehyde EPA 8270C(m) ng/dry g 1 5 Endrin Ketone EPA 8270C(m) ng/dry g 1 5 _ Heptachlor EPA 8270C(m) ng/dry g 1 5 Continued on next page CCWTMP QAPP 53 May 30,2008 Revision 2 Table 13(continued from previous page).Analytical Methods and Project Method Detection and Reporting Limits—Laboratory Analysis ParameterlConstituent Method' Units Project MDL Project RL Heptachlor Epoxide EPA 8270C(m) ng/dry g 1 5 Methoxychlor EPA 8270C(m) ng/dry g 1 5 Mirex EPA 8270C(m) ng/dry g 1 5 Oxychlordane EPA 8270C(m) ng/dry g 1 5 Heptachlor EPA 8270C(m) ng/dry g 1 5 Toxaphene EPA 8270C(m) ng/dry g 10 50 trans-Nonachlor EPA 8270C(m) ng/dry g 1 5 PCBs Congeners EPA 8270C(m) ng/dry g 1 5 Aroclors3 EPA 8270C(m) ng/dry g 10 20 Organophosphorus Pesticides Bolstar(Sulprofos) EPA 8270C(m) ng/dry q 5 10 Chlorpyrifos EPA 8270C(m) ng/dry g 5 10 Demeton EPA 8270C(m) ng/dry g 5 10 Diazinon EPA 8270C(m) ng/dry g 5 10 Dichlorvos EPA 8270C(m) ng/dry g 5 10 Dimethoate EPA 8270C(m) ng/dry g 5 10 Disulfoton EPA 8270C(m) ng/dry g 5 10 Ethoprop(Ethoprofos) EPA 8270C(m) ng/dry g 5 10 Fenchlorophos(Ronnel) EPA 8270C(m) ng/dry g 5 10 Fensulfothion EPA 8270C(m) ng/dry g 5 10 Fenthion EPA 8270C(m) ng/dry q 5 10 Malathion EPA 8270C(m) ng/dry g 5 10 Merphos EPA 8270C(m) ng/dry q 5 10 Methyl Parathion EPA 8270C(m) ng/dry g 5 10 Mevinphos(Phosdrin) EPA 8270C(m) ng/dry g 5 10 Phorate EPA 8270C(m) ng/dry g 5 10 Tetrachlorvinphos(Stirofos) EPA 8270C(m) ng/dry g 5 10 Tokuthion EPA 8270C(m) ng/dry g 5 10 Trichloronate EPA 8270C(m) ng/dry g 5 10 Pyrethroid Pesticidee Allethhn 8270C(NCI) ng/dry g 0.5 2 Bifenthrin 8270C(NCI) ng/dry g 0.5 2 Cyfluthrin 8270C(NCI) ng/dry g 0.5 2 Cypermethrin 8270C(NCI) ng/dry g 0.5 2 Danitol 8270C(NCI) ng/dry g 0.5 2 Deltamethrin 8270C(NCI) ng/dry g 0.5 2 L-Cyhalothrin 8270C(NCI) ng/dry q 0.5 2 Permethrin 8270C(NCI) ng/dry g 0.5 2 Prallethdn 8270C(NCI) ng/dry g 0.5 2 Esfenvalerate 8270C(NCI) ng/dry g 0.5 2 Fenvalerate 8270C(NCI) ng/dry g 0.5 2 Metals Arsenic EPA 6020 ug/dry g 0.03 0.05 Cadmium EPA 6020 ug/dry q 0.03 0.05 Copper EPA 6020 ug/dry q 0.03 0.05 Lead EPA 6020 ug/dry g 0.03 0.05 Mercury EPA 6020 Ng/dry g 0.01 0.02 Nickel EPA 6020 ug/dry g 0.03 0.05 Continued on next page CCWTMP QAPP 54 May 30,2008 Revision 2 Table 13(continued from previous page).Analytical Methods and Project Method Detection and Reporting Limits—Laboratory Analysis Parameter/Constituent Method' Units Project MDL Project RL Selenium EPA 6020 pg/dry g 0.03 0.05 Zinc EPA 6020 ug/dry g 0.03 0.05 Laboratory Analyses-Tissue Percent Lipids Gravimetric % 0.01 0.05 Organochlorine Pesticides Aldrin EPA 8270C(m) nglwet g 1 5 alpha-BHC EPA 8270C(m) ng/wet g 1 5 beta-BHC EPA 8270C(m) nglwet g 1 5 gamma-BHC(Lindane) EPA 8270C(m) nglwet g 1 5 delta-BHC EPA 8270C(m) ng/wet g 1 5 Chlordane-alpha EPA 8270C(m) ng/wet g 1 5 Chlordane-gamma EPA 8270C(m) nglwet g 1 5 Cis-Nonachlor EPA 8270C(m) nglwet g 1 5 2,4'-DDD EPA 8270C(m) ng/wet g 1 5 2,4'-DDE EPA 8270C(m) nglwet g 1 5 2,4'-DDT EPA 8270C(m) nglwet g 1 5 4,4'-DDD EPA 8270C(m) ng/wet g 1 5 4,4'-DDE EPA 8270C(m) nglwet g 1 5 4,4'-DDT EPA 8270C(m) nglwet g 1 5 Dieldrin EPA 8270C(m) nglwet g 1 5 Endosulfan I EPA 8270C(m) ng/wet g 1 5 Endosulfan 11 EPA 8270C(m) nglwet g 1 5 Endosulfan Sulfate EPA 8270C(m) ng/wet g 1 5 Endrin EPA 8270C(m) ng/wet g 1 5 `*##MW Endrin Aldehyde EPA 8270C(m) ng/wet g 1 5 Endrin Ketone EPA 8270C(m) ng/wet g 1 5 Heptachlor EPA 8270C(m) ng/wet g 1 5 Heptachlor Epoxide EPA 8270C(m) nglwet g 1 5 Methoxychlor EPA 8270C(m) nglwet g 1 5 Mirex EPA 8270C(m) nglwet g 1 5 Oxychlordane EPA 8270C(m) nglwet g 1 5 Heptachlor EPA 8270C(m) ng/wet g 1 5 Toxaphene EPA 8270C(m) ng/wet g 10 50 trans-Nonachlor EPA 8270C(m) ng/wet g 1 5 PCBs Congeners EPA 8270C(m) nglwet g 1 5 Aroclors3 EPA 8270C(m) ng/wet g 10 20 Organophosphorus Pesticides Chlorpyrifos EPA 8270C(m) ng/wet g 5 10 Metals Mercury EPA 6020(m) nglwet g 10 20 Selenium EPA 6020(m) nglwet g 25 50 MDL—Method Detection Limit RL—Reporting Limit NA—Not applicable 1 Standard Methods(SM)or EPA Method number 2 The MDLs and/or RLs listed for several organochlorine pesticides in water(adrn,alpha-BHC,chlordane,DDTs, dieldrin and toxaphene)are higher than numeric targets specified in the BPAs.However,the MDLs and/or RLs listed herein are significantly lower than levels currently attainable by commercial laboratories using standard analytical test methods and are consistent with the lowest detection limits reported for NPDES monitoring programs. 3 PCB Aroclors include those presented in Table 2. 4 8270C(NCI),where NCI is negative chemical ionization as allowed under the method. CCWTMP QAPP 55 May 30,2008 Revision 2 Toxicity Testing and Toxicity Identification Evaluations (TIEs) For the CCWTMP, standard test species will be used for toxicity testing. Ceriodaphnia dubia will be used for the aquatic toxicity testing. Hyalella azteca will be used for the bulk sediment and porewater toxicity testing. Eohaustorius estuarius will be used for aquatic, bulk sediment,and porewater toxicity at sampling locations where salinity levels adversely affect the other test species. Americamysis bahia(formerly Mysidopsis bahia)will be used to conduct aquatic toxicity testing if sample salinity exceeds 1 part per thousand(PPT) but is less than 15 PPT. The test species selected are standard USEPA test species considered to be among the most sensitive species to many different types of pollutants. The test species are particularly sensitive to constituents previously identified as contributing to toxicity in water and/or sediment in the CCW. C. dubia is a water flea known to be extremely sensitive to organophosphate pesticides and some metals and also is used as an indicator of ammonia toxicity. H. azteca is a sediment dwelling invertebrate that is sensitive to ammonia and organochlorine pesticides. E. estuarius is a burrowing amphipod that is sensitive to organochlorine and organophosphate pesticides. A. bahia is a shrimp known to be sensitive to organophosphate pesticides. At such a time as toxicity numeric targets are consistently met, alternative species may be considered if it is determined the aforementioned species are not completely assessing toxicity in the CCW. The following is an optional monitoring element as discussed in Element 6 (Project Description). Sediment toxicity testing to either Mytilus edulis or Crassostrea gigas embryos may be conducted for comparison to the California Sediment Quality Guidelines, which are currently under development. Because embryo testing is not required to meet the requirements of the TMDL monitoring, the decision to implement this component of the CCWTMP will be made by the Management Committee per the process outlined in the Optional Monitoring Elements section of the Project Description (Element 6). Water and toxicity testing will be conducted according to current USEPA guidelines. These species are standard USEPA test species considered to be among the most sensitive species to many different types of pollutants. These test species are particularly sensitive to constituents previously identified as contributing to toxicity in water and/or sediment. Chronic tests will be used to assess both survival and reproductive/growth endpoints for each species. Test species may be added or removed in the future to adequately identify the presence/absence of toxicity. Multiple dilution tests on water samples will be conducted to determine the magnitude of toxicity and subsequently the value of the toxic unit chronic(TUc). At the initiation of monitoring the following five dilutions will be used: 100%, 50%, 25%, 12.5%, and 6.25%. The number of dilutions and percent dilutions may be adjusted based on analytical results. The results of toxicity testing will be used to trigger further investigations to determine the cause of observed laboratory toxicity. If testing indicates the presence of significant toxicity in the sample, TIE procedures may be initiated to investigate the cause of toxicity. For the purpose of triggering TIE procedures, significant toxicity is defined as at least 50% mortality. The 50% mortality threshold is consistent with the approach recommended in guidance published by USEPA for conducting TIEs(USEPA, 1996),which recommends a minimum threshold of 50% mortality �-- because the probability of completing a successful TIE decreases rapidly for samples with less CCWTMP QAPP 56 May 30,2008 Revision 2 than this level of toxicity. A targeted Phase 1 TIE will be conducted to determine the general class of constituent(i.e., non-polar organics)causing toxicity. The targeted TIE will focus on classes of constituents anticipated to be observed in drainages dominated by urban and agricultural discharges and those previously observed to cause toxicity. These classes of constituents are non-polar organics. Phase 2 TIEs may also be utilized to identify specific constituents causing toxicity if warranted. TIE methods will generally adhere to USEPA procedures documented in conducting TIEs(USEPA, 1991, 1992, 1993a-b). For samples exhibiting toxic effects consistent with carbofuran, diazinon, or chlorpyrifos, TIE procedures will follow those documented in Bailey et al. (1996). As stated above, chronic tests will be used to assess both survival and reproductive/growth endpoints for each species to allow for an evaluation of compliance with the 1 TUc endpoint in water established in the Toxicity TMDL BPA and in the Conditional Waiver. Therefore, the sensitivity of this endpoint is conserved. Similar to the VCAILG QAPP TIE approach, the 50% mortality endpoint is for TIE initiation only not for assessing compliance with the TMDL. For clarification, a toxic effect(mortality or reduced reproduction/growth)observed in 96 hours or less is typically considered acute. A chronic toxic effect(which can include mortality or reduced reproduction/growth), would be the effect observed over the portion of the test beyond the test duration of an acute test. Any project-specific modifications to these methods will be documented in future amendments to this QAPP. TIE procedures will be initiated as soon as possible after toxicity is observed to reduce the potential for loss of toxicity due to extended sample storage. Substantial work has been completed in the CCW utilizing TIEs conducted on sediment porewater, the most common and accepted approach for the performance of sediment TIEs(USEPA 1991). While there has been significant advancement regarding the application of the TIE process to bulk sediments, USEPA accepted methods for the performance of bulk-sediment TIEs are yet to be finalized and accepted; however, USEPA is planning to update its Sediment TIE Guidance manual in the near future to include methods for performance of bulk-sediment TIEs in addition to the current accepted porewater TIE methods. Until bulk sediment TIE procedures are more completely developed and accepted and/or it is felt their use in the CCW will significantly improve the determination of causes unknown toxicity,the CCWTMP will utilize porewater TIE methods. To address toxicity of unknown causes in sediment, sediment porewater will be extracted and tested for toxicity when significant toxicity, defined as at least 50% mortality, is observed in the bulk sediment sample. If the subsequent sediment porewater toxicity testing results in greater than 50% mortality, a Phase 1 TIE may be initiated on the sediment porewater. The decision to initiate TIE procedures on any sample, including samples exceeding the mortality threshold, as well as the focus and scope of TIE procedures,will be determined through consultation between the Project Manager, the toxicity laboratory, and Regional Board staff. When deciding whether to initiate TIE procedures for a specific site and monitoring event, a number of factors will be considered, including the level of toxicity, history of toxicity at the site, the species and endpoints exhibiting toxic effects, as well as the primary technical basis for triggering TIEs described above. The rationale for initiating TIE procedures for a specific sample will be clearly ell- documented in subsequent reports. CCWTMP LAPP 57 May 30,2008 Revision 2 Grain Size Fraction Analysis The following is an optional monitoring element as discussed in Element 6(Project Description). The decision to implement and/or modify the grain size fraction analysis will be made by the Management Committee per the process outlined in the Optional Monitoring Elements section of the Project Description (Element 6). Grain size fraction analysis is not required to meet the requirements of TMDL monitoring. However, the various fractions (aqueous and sediment and the two grain size fractions)could be considered to develop an understanding of how target organic constituents are transported through the watershed. This information can be used to assess the potential effectiveness of best management practices given the association of target organic constituents with the different grain size fractions. Because grain size fraction analysis is not required to meet the requirements of the TMDL monitoring and is for investigative purposes only, this component of the CCWTMP may be modified by the Management Committee per the process outlined in the Optional Monitoring Elements section of the Project Description (Element 6). Grain size fraction analysis could be conducted on wet-weather and streambed samples. During one wet-weather sampling event each year, water column samples could be filtered, after which the sediment and aqueous fractions could be analyzed separately for target organic constituents. The sediment fraction could be sieved into two grain size fractions(2mm-63um and less than 63um), after which the whole sample and the two grain size fractions could be analyzed separately. Analysis for general water quality constituents would need to be conducted on the whole sample. During the sediment sampling event, samples could be sieved into two grain size fractions (2mm- 63um and less than 63um), after which the whole sample as well as two grain size categories could be analyzed separately for target organic constituents. Measurements of general sediment quality constituents (GSQC)would need to be conducted on the whole sample. Because grain size fraction analysis is not required to meet the requirements of the TMDL monitoring and is for investigative purposes only,this component of the CCWTMP may be modified by the Management Committee per the process outlined in the Optional Monitoring Elements section of the Project Description (Element 6). Macrobenthic Community Assessment The following is an optional monitoring element as discussed in Element 6 (Project Description). The decision to implement and/or modify the macrobenthic community assessment will be made by the Management Committee per the process outlined in the Optional Monitoring Elements section of the Project Description (Element 6). Macrobenthic community assessment in Mugu Lagoon is not required to meet the requirements of TMDL monitoring. However, sediment samples collected subtidally in Mugu Lagoon could be analyzed to assess macrobenthic(infaunal)communities, which would develop data that, in conjunction with sediment toxicity and chemistry data, can be compared to the California Sediment Quality Objectives(SQOs),which are currently being developed. Single benthic samples could be collected from each sediment sampling zone in Mugu Lagoon and analyzed for species composition and abundance. Appendix D contains an SOP for analyzing samples to characterize macrobenthic communities. Because macrobenthic community assessment in Mugu Lagoon is not required to meet the requirements of the TMDL monitoring, this component of the CCWTMP may be modified by the Management Committee per the process outlined in the Optional Monitoring Elements section of the Project Description (Element 6). �r CCWTMP QAPP 58 May 30,2008 Revision 2 r'^ Detection and Reporting Limits Method detection limits(MDL)and reporting limits(RLs) must be distinguished for proper understanding and data use. The MDL is the minimum analyte concentration that can be measured and reported with a 99% confidence that the concentration is greater than zero. The RL represents the concentration of an analyte that can be routinely measured in the sampled matrix within stated limits and with confidence in both identification and quantitation. For this program, RLs must be verifiable by having the lowest non-zero calibration standard or calibration check sample concentration at or less than the RL. RLs have been established in this QAPP based on the verifiable levels and general measurement capabilities demonstrated for each method. These RLs should be considered as maximum allowable reporting limits to be used for laboratory data reporting. Note that samples diluted for analysis may have sample-specific RLs that exceed these RLs. This will be unavoidable on occasion. However, if samples are consistently diluted to overcome matrix interferences, the analytical laboratory will be required to notify the Project Manager how the sample preparation or test procedure in question will be modified to reduce matrix interferences so that project RLs can be met consistently. Method Detection Limit Studies Any laboratory performing analyses under this program must routinely conduct MDL studies to document that the MDLs are less than or equal to the project-specified RLs. If any analytes have MDLs that do not meet the project RLs, the following steps must be taken: �.. • Perform a new MDL study using concentrations sufficient to prove analyte quantitation at concentrations less than or equal to the project-specified RLs per the procedure for the Determination of the Method Detection Limit presented in Revision 1.1,40 Code of Federal Regulations (CFR) 136, 1984. • No samples may be analyzed until the issue has been resolved. MDL study results must be available for review during audits, data review, or as requested. Current MDL study results must be reported for review and inclusion in project files. An MDL is developed from seven aliquots of a standard containing all analytes of interest spiked at five times the expected MDL. These aliquots are processed and analyzed in the same manner as environmental samples The results are then used to calculate the MDL. If the calculated MDL is less than 0.33 times the spiked concentration, another MDL study should be performed using lower spiked concentrations. Project Reporting Limits Laboratories generally establish RLs that are reported with the analytical results—these may be called reporting limits, detection limits, reporting detection limits, or several other terms by the reporting laboratory. These laboratory limits must be less than or equal to the project RLs listed in Table 12. Wherever possible, project RLs are lower than the relevant numeric criteria or toxicity thresholds. Laboratories performing analyses for this project must have documentation to support quantitation at the required levels. CCWTMP QAPP 59 May 30,2008 Revision 2 Laboratory Standards and Reagents All stock standards and reagents used for standard solutions and extractions must be tracked through the laboratory. The preparation and use of all working standards must be documented according to procedures outlined in each laboratory's Quality Assurance Manual; standards must be traceable according to U.S. EPA, A2LA or National Institute for Standards and Technology (NIST)criteria. Records must have sufficient detail to allow determination of the identity, concentration, and viability of the standards, including any dilutions performed to obtain the working standard. Date of preparation, analyte or mixture, concentration, name of preparer, lot or cylinder number, and expiration date, if applicable, must be recorded on each working standard. Alternate Laboratories In the event that the laboratories selected to perform analyses for the CCWTMP are unable to fulfill data quality requirements outlined herein (e.g., due to instrument malfunction), alternate laboratories will be selected based on their ability to meet ELAP and/or NELAP certifications and data quality requirements specified in this QAPP. The original laboratory selected may recommend a qualified laboratory to act as a substitute. However, the final decision regarding alternate laboratory selection rests with the Project Manager and Project QA Manager. 14. Quality Control Quality control procedures for the field and laboratory activities are summarized in Table 14 and discussed in more detail below. There are no SWAMP requirements for quality control for field analysis of general parameters (e.g., temperature, pH, conductivity,dissolved oxygen, and pH). However, field crews will be required to calibrate equipment as outlined in Element 11 (Sampling Methods). Table 14 presents the QA parameter addressed by each QA requirement as well as the appropriate corrective action if the acceptance limit is exceeded. CCWTMP QAPP 60 May 30,2008 Revision 2 Table 14.Quality Control Requirements Quality Control QA Parameter Frequency' Acceptance Limits Corrective Action Sample Type Quality Control Requirements—Field Once per Identify contamination source,re- Equipment Blanks Contamination equipment batch <MDL clean equipment,and re-run cleaned 2 equipment blank. 5%of all <MDL Examine field log. Field Blank Contamination samples Identify contamination source. Qualify data as needed. 5%of all RPD<30%if Reanalyze both samples if possible. Field Duplicate Precision samples IDifferencel>RL Identify variability source. Qualify data as needed. Quality Control Requirements—Laboratory Identify contamination source. Method Blank Contamination Il per analytical <MDL Reanalyze method blank and all batch samples in batch. Qualify data as needed. Lab Duplicate Precision 1 per analytical RPD<30%if Recalibrate and reanalyze. batch lDifferencel>RL 70-120%Recovery for Check LCS/SRM recovery. 1 per analytical GWQC Attempt to correct matrix problem Matrix Spike Accuracy 45-150%for Metals batch 50-150%Recovery for and reanalyze samples. Pesticides PI Qualify data as needed. Check lab duplicate RPD. Matrix Spike Duplicate Precision 1 per analytical RPD<30%if Attempt to correct matrix problem �+✓ batch IDifferencel>RL and reanalyze samples. Qualify data as needed. 70-120%Recovery for Laboratory Control 1 per analytical GWQC Recalibrate and reanalyze LCS/ Sample(or SRM) Accuracy batch 45-150%for Metals SRM and samples. 50-150%Recovery for Pesticides Each Check surrogate recovery in LCS. Surrogate Spike Accuracy environmental 30-150%Recovery3 Attempt to correct matrix problem and (Organics Only) and lab QC reanalyze sample. sample Qualify data as needed. MDL=Method Detection Limit RL=Reporting Limit RPD=Relative Percent Difference LCS=Laboratory Control Sample/Standard SRM=Standard/Certified Reference Material GWQC=General Water Quality Constituents 1 "Analytical batch"refers to a number of samples(not to exceed 20 environmental samples plus the associated quality control samples)that are similar in matrix type and processed/prepared together under the same conditions and same reagents(equivalent to preparation batch). 2 Equipment blanks will be collected by the analytical laboratory responsible for cleaning equipment,before returning equipment to the field crew for use. 3 Or control limits set at±3 standard deviations based on actual laboratory data. Comparability Comparability of the data can be defined as the similarity of data generated by different monitoring programs. For this monitoring program, this objective will be ensured mainly through use of standardized procedures for field measurements, sample collection, sample preparation, laboratory analysis,and site selection; adherence to quality assurance protocols and holding times; and CCWTMP QAPP 61 May 30,2008 Revision 2 reporting in standard units. Additionally, comparability of analytical.data will be addressed through the use of standard operating procedures and extensive analyst training at the analyzing laboratory. Representativeness Representativeness can be defined as the degree to which the environmental data generated by the monitoring program accurately and precisely represent actual environmental conditions. For the CCWTMP, this objective will be addressed by the overall design of the program. Representativeness is attained through the selection of sampling locations, methods, and frequencies for each parameter of interest, and by maintaining the integrity of each sample after collection. Sampling locations were chosen that are representative of various areas within the watershed and discharges from urban and agricultural lands, which will allow for the characterization of the watershed and impacts discharges may have on water quality. Completeness Data completeness is a measure of the amount of successfully collected and validated data relative to the amount of data planned to be collected for the project. It is usually expressed as a percentage value. A project objective for percent completeness is typically based on the percentage of the data needed for the program or study to reach valid conclusions. Because the CCWTMP is intended to be a long term monitoring program, data that are not successfully collected during a specific sample event will not be recollected at a later date. Rather subsequent events conducted over the course of the monitoring will provide robust data sets to w appropriately characterize conditions at individual sampling sites and the watershed in general. For this reason, most of the data planned for collection cannot be considered absolutely critical, and it is difficult to set a meaningful objective for data completeness. However, some reasonable objectives for data are desirable, if only to measure the effectiveness of the program when conditions allow for the collection of samples(i.e.,flow is present). The program goals for data completeness shown in Table 15 are based on the planned sampling frequency, SWAMP recommendations, and a subjective determination of the relative importance of the monitoring element within the CCWTMP. If, however, sampling sites do not allow for the coilection of enough samples to provide representative data due to conditions(i.e., no flow) alternate sites will be considered. Data completeness will be evaluated on a four year basis to allow for consideration of two Mugu Lagoon sediment and tissue collection events. Grain size fraction analysis,embryo toxicity testing, and macrobenthic community analysis in Mugu Lagoon are optional monitoring elements and are not required to meet the requirements of the TMDL monitoring. As such, these components of the CCWTMP may be discontinued at any time by Management Committee per the process outlined in the Optional Monitoring Elements section of the Project Description (Element 6) and are not assigned completeness objectives. CCWTMP QAPP 62 May 30,2008 Revision 2 Table 15. Required Data Completeness Monitoring Element Completeness Objective Field Measurements 90% Conventional Parameters 90% Organic Constituents 90% Metals 90% Toxicity' 90% 1 Does not including sediment toxicity testing on embryos. Field Procedures For basic water quality analyses, quality control samples to be prepared in the field will consist of equipment blanks, field blanks and field duplicates. Equipment Blanks The purpose of analyzing equipment blanks is to demonstrate that sampling equipment is free from contamination. Equipment blanks will be collected by the analytical laboratory responsible for cleaning equipment and analyzed for pesticides, PCBs, and metals identified in Table 2 before sending the equipment to the field crew. Equipment blanks will consist of laboratory-prepared blank water(certified to be contaminant-free by the laboratory) processed through the sampling equipment that will be used to collect environmental samples. The blanks will be analyzed using the same analytical methods specified for environmental samples. If any analytes of interest are detected at levels greater than the MDL,the source(s)of contamination will be identified and eliminated (if possible), the affected batch of equipment will be re-cleaned, and new equipment blanks will be prepared and analyzed before the equipment is returned to the field crew for use. Field Blanks The purpose of analyzing field blanks is to demonstrate that sampling procedures do not result in contamination of the environmental samples. Per the Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program (SWRCB, 2002)field blanks are to be collected as follows: • At a frequency of 5% of samples collected for the following constituents: trace metals in water(including mercury),VOA samples in water and sediment, DOC samples in water, and bacteria samples. • Field blanks for other media and analytes should be conducted upon initiation of sampling, and if field blank performance is acceptable (as described in Table 14), further collection and analysis of field blanks for these other media and analytes need only be performed on an as-needed basis, or during field performance audits. An as-needed basis for the CCW TMDL QAPP will be annually. Blanks will consist of laboratory-prepared blank water(certified to be contaminant-free by the laboratory) processed through the sampling equipment using the same procedures used for environmental samples. CCWTMP QAPP 63 May 30,2008 Revision 2 If any analytes of interest are detected at levels greater than the MDL, the source(s)of contamination should be identified and eliminated, if possible. The sampling crew should be notified so that the source of contamination can be identified (if possible)and corrective measures taken prior to the next sampling event. Field Duplicates The purpose of analyzing field duplicates is to demonstrate the precision of sampling and analytical processes. Field duplicates will be prepared at the rate of 5%of all samples, and analyzed along with the associated environmental samples. Field duplicates will consist of two grab samples collected simultaneously, to the extent practicable. If the Relative Percent Difference(RPD) of field duplicate results is greater than 25% and the absolute difference is greater than the RL, both samples should be reanalyzed, if possible. The sampling crew should be notified so that the source of sampling variability can be identified (if possible)and corrective measures taken prior to the next sampling event. Laboratory Analyses Quality control samples prepared in the laboratory will consist of method blanks, laboratory duplicates, matrix spikes/duplicates, laboratory control samples(standard reference materials), and toxicity quality controls. Method Blanks The purpose of analyzing method blanks is to demonstrate that sample preparation and analytical procedures do not result in sample contamination. Method blanks will be prepared and analyzed by the contract laboratory at a rate of at least one for each analytical batch. Method blanks will `•.� consist of laboratory-prepared blank water processed along with the batch of environmental samples. If the result for a single method blank is greater than the MDL,or if the average blank concentration plus two standard deviations of three or more blanks is greater than the RL, the source(s)of contamination should be corrected, and the associated samples should be reanalyzed. Laboratory Duplicates The purpose of analyzing laboratory duplicates is to demonstrate the precision of the sample preparation and analytical methods. Laboratory duplicates will be analyzed at the rate of one pair per sample batch. Laboratory duplicates will consist of duplicate laboratory fortified method blanks. If the Relative Percent Difference(RPD)for any analyte is greater than 25% and the absolute difference between duplicates is greater than the RL, the analytical process is not being performed adequately for that analyte. In this case, the sample batch should be prepared again, and laboratory duplicates should be reanalyzed. Matrix Spikes and Matrix Spike Duplicates The purpose of analyzing matrix spikes and matrix spike duplicates is to demonstrate the performance of the sample preparation and analytical methods in a particular sample matrix. Matrix spikes and matrix spike duplicates will be analyzed at the rate of one pair per sample batch. Each matrix spike and matrix spike duplicate will consist of an aliquot of laboratory-fortified environmental sample. Spike concentrations should be added at five to ten times the reporting limit for the analyte of interest. {- If the matrix spike recovery of any analyte is outside the acceptable range, the results for that �•• CCWTMP QAPP 64 May 30, 2008 Revision 2 analyte have failed to meet acceptance criteria. If recovery of laboratory control samples is acceptable, the analytical process is being performed adequately for that analyte, and the problem is attributable to the sample matrix. An attempt will be made to correct the problem(e.g., by dilution, concentration, etc.), and the samples and matrix spikes will be re-analyzed. If the matrix spike duplicate RPD for any analyte is outside the acceptable range, the results for that analyte have failed to meet acceptance criteria. If the RPD for laboratory duplicates is acceptable, the analytical process is being performed adequately for that analyte, and the problem is attributable to the sample matrix. An attempt will be made to correct the problem (e.g., by dilution,concentration,etc.), and the samples and matrix spikes will be re-analyzed. Laboratory Control Samples The purpose of analyzing laboratory control samples(or a standard reference material)is to demonstrate the accuracy of the sample preparation and analytical methods. Laboratory control samples will be analyzed at the rate of one per sample batch. Laboratory control samples will consist of laboratory fortified method blanks or a standard reference material. If recovery of any analyte is outside the acceptable range,the analytical process is not being performed adequately for that analyte. In this case, the sample batch should be prepared again, and the laboratory control sample should be reanalyzed. Surrogate Spikes Surrogate recovery results are used to evaluate the accuracy of analytical measurements for organics analyses on a sample-specific basis. A surrogate is a compound (or compounds) added by the laboratory to method blanks, samples, matrix spikes, and matrix spike duplicates prior to L... sample preparation, as specified in the analytical methodology. Surrogates are generally brominated,fluorinated or isotopically labeled compounds that are not usually present in environmental media. Results are expressed as percent recovery of the surrogate spike. Surrogate spikes are applicable for analysis of PCBs and pesticides. Toxicity Quality Control For aquatic toxicity tests, the acceptability of test results is determined primarily by performance- based criteria for test organisms, culture and test conditions, and the results of control bioassays. Control bioassays include monthly reference toxicant testing. Test acceptability requirements are documented in the method documents for each bioassay method and are included in Appendix D. 15. Instrument/Equipment Testing, Inspection and Maintenance Sample Equipment Cleaning Procedures Equipment used for sample collection (i.e., peristaltic pump tubing, sample containers and caps) will be cleaned by the analytical laboratory prior to each sample event, according to procedures documented for each analytical method. After cleaning, sample containers will be stored with lids secured, and additional clean caps will be stored in clean re-sealable bags. Cleaned tubing will be stored in clean polyethylene bags. Each batch of cleaned equipment will be used to generate an equipment blank as discussed in Element 14 (Quality Control). 1 , CCWTMP QAPP 65 May 30,2008 Revision 2 Field Measurement Equipment Each field crew will be responsible for testing, inspecting, and maintaining their field measurement equipment in accordance with the manufacturer's specifications. This includes battery checks, routine replacement of membranes, and cleaning of probes and electrodes. Analytical Equipment Testing Procedures and Corrective Actions Testing, inspection, maintenance of analytical equipment used by the contract laboratory and corrective actions are documented in the QA Manual for each analyzing laboratory. Laboratory QA Manuals are available for review at the analyzing laboratory. 16. Instrument/Equipment Calibration and Frequency Laboratory Analytical Equipment Frequencies and procedures for calibration of analytical equipment used by each contract laboratory are documented in the QA Manual for each contract laboratory. Any deficiencies in analytical equipment calibration should be managed in accordance with the QA Manual for each contract laboratory. Any deficiencies that affect analysis of samples submitted through this program must be reported to the Project Manager, or designee. Laboratory QA Manuals are available for review at the analyzing laboratory. Field Measurement Equipment Calibration of field measurement equipment is performed as described in the owner's manuals for each individual instrument. Each individual field crew will be responsible for calibrating their field measurement equipment. Field monitoring equipment must meet the requirements outlined in Table 5 and be calibrated before field events based on manufacturer guidance, but at a minimum prior to each event. Each calibration will be document on each event's calibration log sheet (presented in Figure 11). If calibration results do not meet manufacturer specifications, the field crew should first try to recalibrate using fresh aliquots of calibration solution. If recalibration is unsuccessful, new calibration solution should be used and/or maintenance should be performed. Each attempt should be recorded on the equipment calibration log. If the calibration results cannot meet manufacturer's specifications, the field crew should use a spare field measuring device that can be successfully calibrated. Additionally, the Project Manager should be notified. Calibration should be verified using at least one calibration fluid within the expected range of field measurements, both immediately following calibration and at the end of each monitoring day. Individual parameters should be recalibrated if the field meters do not measure a calibration fluid within the range of accuracy presented in Table 5. Calibration verification documentation will be retained in the event's calibration verification log (presented in Figure 12). Table 16 outlines the typical field instrument calibration procedures for each piece of equipment requiring calibration. Results of calibration checks will be recorded on the calibration log sheet(presented in Figure 11). CCWTMP QAPP 66 May 30,2008 Revision 2 Table 16. Calibration of Field Measurement Equipment Equipment 1 Frequency of Frequency of Responsible Instrument Calibration and Verification Description Calibration Calibration Party Verification Calibration for pH measurement is accomplished pH Probe using standard buffer solutions. Analysis of a mid-range buffer will be performed to verify successful calibration. . Temperature Temperature calibration is factory-set and requires no subsequent calibration. Calibration for dissolved oxygen measurements is accomplished using a water saturated air environment. Dissolved oxygen(D.O.) Day prior to 13t After each day's Individual Dissolved measurement of water-saturated air will be day or 1St day calibration and at Sampling Oxygen Probe performed and compared to a standard table of of sampling the end of the Crews D.O.concentrations in water as a function of event sampling day temperature and barometric pressure to verify successful calibration. Conductivity calibration will follow manufacturer's Conductivity specifications. A mid-range conductivity standard will be analyzed to verify successful calibration. Turbidity calibration will follow manufacturer's Turbidity specifications. A mid-range turbidity standard will be analyzed to verify successful calibration. CCWTMP QAPP 67 May 30,2008 Revision 2 Field Measurement Equipment Calibration Log Date: Calibration Post-Cal Calibration Valid Time Parameter Meter ID Standard Measurement if: (24-hour) Initials D.O.reads within D.O. mmHg mglL 10%of value from (water-sat'd air) D.O.tables Conductivity 500 uS/cm Conductivity 10,000 us/cm uS/cm EC reads wrn 5%of (mid-range std.) expected value pH 7.0 Units pH 8 reads within pH 10.0 (pH-8.0) +0.2 Units(or whn manuf s specs Turbidity 0 NTU Turbidity 100 NTU NTU Mreads within Turbidity 1000 NTU (100 NTU) NTU 10%of expected value `.. Turbidity 3000 NTU Notes: Figure 11. Example Field Measurement Equipment Calibration Log Sheet Field Measurement Equipment Calibration Verification Log Date: Verification Calibration Valid Time Parameter Meter ID Standard Measurement if: (24-hour) Initials D.O.reads within D.O. mmHg water sat'd air)/ L 10%of value from D.O.tables Conductivity uS/cm uS/cm EC reads wIn 5%of (mid-range std.) expected value Units pH 8 reads within pH Units +0.2 Units(or wrn (pH=8.0) manufs specs) NTU reads within Turbidity NTU (100 NTU) NTU 10%of expected value Notes: Figure 12. Example Field Measurement Equipment Calibration Verification Log Sheet CCWTMP QAPP 68 May 30,2008 Revision 2 17. Inspection/Acceptance of Supplies and Consumables Inspection of gloves, sample containers, and any other consumable equipment used for sampling will be the responsibility of each individual sampling crew. Inspection should be conducted immediately upon receipt of equipment; equipment should be rejected/returned if any obvious signs of contamination (torn packages, etc.) are observed. Inspection protocols and acceptance criteria for laboratory analytical reagents and other Consumables are documented in the QA Manual for each laboratory. 18. Non-Direct Measurements Water quality data collected through other monitoring programs (NPDES POTW and Stormwater monitoring and the VCAILG program) in the watershed will be incorporated to the extent practicable. The extent practicable will be dictated by the cost of gathering and compiling information from outside programs. It is not the intent or purpose of the CCWTMP to compile and analyze all available data. Data reported by these entities will be evaluated for suitability for inclusion in the CCWTMP database. If the data are deemed to be suitable they will be included in the database described in the following element. Data from other programs will be used to supplement land use data to evaluate loading to the receiving water as well as to evaluate receiving water quality. It is the responsibility of the Project QA Manager(or designee)to acquire, validate, and compile the necessary data from these programs. The data will be reviewed against the data quality objectives stated in Element 7(Quality Objectives and Criteria for Measurement Data), if possible. 19. Data Management Event Summary Reports and Analytical Data Reports(described in Element 9)will be sent to and kept by the Project Manager. Each type of report will be stored separately and ordered chronologically. The field crew shall retain the original field logs. The contract laboratory shall retain original COC forms. The contract laboratory will retain copies of the preliminary and final data reports, Concentrations of all parameters will be calculated as described in the laboratory SOPs or referenced method document for each analyte or parameter. The various data and information generated from CCWTMP will be stored and maintained as described in Element 9 (Documents and Records). The field log and analytical data generated will be converted to a standard database format maintained on personal computers. After data entry or data transfer procedures are completed for each sample event, data will be validated as described in Element D(Data Validation and Usability). After the final quality assurance checks for errors are completed, the data will be added to the final database. The database consists of a MicrosoftTm Access database developed for the program and administered by Larry Walker Associates or designee. The version of MicrosoftT"" Access database used to manage data will be upgraded as necessary to meet the requirements of the program. Program data will be submitted electronically with the Annual Monitoring Report in either Microsoft CCWTMP QAPP 69 May 30,2008 Revision 2 Access®or Microsoft Excel®file format. Tabular data summaries included in the annual report will `-- be generated from this data file ("database"). Additionally, those data collected by the CCWTMP will be formatted to comply with SWAMP database requirements. C. ASSESSMENT AND OVERSIGHT 20. Assessments and Response Actions Data will be evaluated and documented after each monitoring event to determine whether project quality assurance objectives have been met, to quantitatively assess data quality, and to identify potential limitations on data use. The following assessments of compliance with quality control procedures will be performed during the data collection phase of the project: • Performance assessments of sampling procedures will be performed by the field sampling crews. Corrective actions shall be carried out by the field sampling crew and reported to the Project Manager, or designee. • Field crews will be audited annually by the Project Manager or designee. The initial audit will occur during the first monitoring event. Additional audits will occur as necessary to observe corrective actions taken to resolve errors identified during a previous audit. • The laboratory is responsible for following established SOPs, including those for proper instrument calibration and maintenance and laboratory QC sample analyses at the required frequency(i.e., method blanks, laboratory control samples, etc.)Associated QC sample results are reported with all sample results so that project staff can evaluate the analytical process performance. • Assessment of laboratory QC results and implementation of corrective actions will be the responsibility of the QA Officer at each laboratory and shall be reported to the Project QA Manager,or designee, as part of any data reports. • Assessment of field QC results and implementation of corrective actions shall be the responsibility of the Project QA Manager, or designee. All project data must be reviewed as part of the data assessment. Review is conducted on a preparation batch basis by assessing QC samples and all associated environmental sample results. Project data review established for this project includes the following steps: • Initial review of analytical and field data for complete and accurate documentation, chain- of-custody procedures, compliance with required holding times, and required frequency of field and laboratory QC samples; • Evaluation of analytical and field blank results to identify random and systematic contamination; • Comparison of all spike and duplicate results with data quality objectives for precision and accuracy; • Assigning data qualifier flags to the data as necessary to reflect data use limitations identified by the assessment process;and, • Calculating completeness by analyte. CCWTMP QAPP 70 May 30,2008 Revision 2 The Project QA Manager, or designee, is responsible for conducting the data assessment and for �- ensuring that data qualifier flags are assigned, as needed, based on the established quality control criteria. If an assessment or audit discovers any discrepancy, the Project QA Manager,or designee, will address the observed discrepancy with the appropriate person responsible for the activity. Discussion points will include whether the information collected is accurate, identifying the cause(s) leading to the deviation, how the deviation might impact data quality, and what corrective actions might be considered. The Project QA Manager,or designee,will maintain a QA Log of all communications and any specified corrective actions, and will make the QA Log available to the Project Manager upon request. Routine procedures to assess the success of the data collection effort are discussed in the Section D(Data Validation and Usability). Routine procedures for corrective actions are summarized in Table 14. 21. Reports to Management In addition to the information provided in Element 9 (Documents and Records), the following reports will be generated: Documents and records for the CCWTMP include: Event Summary Reports,Analytical Data Reports,Annual Reports, and the QAPP. These documents are described in detail in Element 9 (Documents and Records). Table 17 outlines the schedule of when the aforementioned reports will be submitted to management. Table 17. Reports to Management Schedule Person/Organization Type of Report Frequency Delivery Date Responsible for Report Recipients Preparation Quarterly Update Quarterly Every third month at a meeting of Project Manager CCW Management Management Committee Plan Members Event Summary With in one week of the completion Field Crew Project Manager and Reports Approximately of each sampling event Project QA Manager six times per Analytical Data year Within 30 days of sample delivery Contract Laboratories Project QA Manager Reports Annual Report and Electronic Database Four months after receipt of the CCW Management Annually final analytical data report to be Project Manager Plan Members Revised QAPP included in Annual Report Quarterly Updates Quarterly updates will be provided by the Project Manager at a quarterly meeting of the Management Committee participating in the QAPP. The update will include a brief summary of activities completed in the previous quarter, but will not include data. +rr CCWTMP QAPP 71 May 30,2008 Revision 2 Annual Watershed Monitoring Report A Watershed Monitoring Report will be completed annually by the Project Manager to provide an overview of the conditions in the CCW and to meet TMDL requirements. The Watershed Monitoring Report will be submitted within four months of receipt of the final analytical data report for the sampling year. Appropriate statistical methods will be employed for interpretive analysis of the data. Data will be presented through the use of summary tables, descriptive statistics, and graphical representations(e.g., time series,frequency histograms, mapping,etc.). The Watershed Monitoring Report will provide, at minimum, a comprehensive analysis of the following: • Monitoring objectives; • Monitoring site descriptions including GPS coordinates for each site, location within the waterbody, and a location map of all sites; • Information on type of sample (grab or composite) and the waterbody condition during sample collection; • Tabulated results of field laboratory data, including sampling and analytical methods used; • Copies of chain-of-custody forms; • Associated field and laboratory quality control sample results, including a summary of accuracy and precision; • Comparison of data to TMDL allocations and applicable criteria; • Trends in water, sediment, and fish tissue data; • Analysis of sources of constituents of concern; and, • Conclusions and recommendations. `... An adaptive management approach to the CCWTMP will be adopted as it may be necessary to modify aspects of the CCWTMP. Results of sampling carried out through the CCWTMP and other programs within the CCW may be used to modify this plan, as appropriate. Proposed modifications will be brought to the Management Committee for discussion. Any agreed upon modifications will be summarized in the annual report and incorporated into the QAPP. Possible modifications could include, but are not limited to the, following: • The inclusion of additional land use stations to accurately characterize loadings; • The removal of land use stations if it is determined they are duplicative(i.e., a land use site in one subwatershed accurately characterize the land use in other subwatersheds); • The inclusion of additional in-stream sampling stations; • The addition of analysis for constituents identified as contributing to toxicity; and, • The elimination of certain analysis for constituents based on the attainment of allocations or being no longer identified in land use and/or in-stream samples. If a coordinated and comprehensive monitoring plan that addresses multiple regulatory requirements (i.e.,TMDL, NPDES,Ag Waiver, etc.)is developed and meets the goals of this monitoring plan, that plan should be considered as a replacement for the CCWTMP. Any such plan would require the approval of the Executive Officer. An electronic database will be submitted as an attachment to the Annual Report and will include the results of all field and laboratory data, as well as copies of all field documentation and L� CCWTMP QAPP 72 May 30,2008 Revision 2 laboratory original data reports in PDF format. Data submitted electronically will be made available for inclusion in the SWAMP database. D. DATA VALIDATION AND USABILITY 22. Data Review, Verification and Validation Requirements The acceptability of data is determined through data verification and data validation. Both processes are discussed in detail below. In addition to the data quality objectives presented in Table 14, the standard data validation procedures documented in the contract laboratory's QA Manual will be used to accept, reject, or qualify the data generated by the laboratory. Each laboratory's QA Officer will be responsible for validating data generated by the laboratory. Once analytical results are received from the analyzing laboratory, the Project QA Officer will perform an independent review and validation of analytical results. Appendix G provides equations that are used to calculate precision, accuracy, and completeness of the data. Decisions to reject or qualify data will be made by the Project QA Manager, or designee, based on the evaluation of field and laboratory quality control data, according to procedures outlined in Section 13 of Caltrans document No. CTSW-RT-00-005, Guidance Manual., StormwaterMonitoring Protocols, 2nd Edition (LWA, July 2000). Section 13 of the Caltrans Guidance Manual is included as Appendix H. 23. Data Verification '`-�- Data verification involves verifying that required methods and procedures have been followed at all stages of the data collection process, including sample collection, sample receipt, sample preparation, sample analysis, and documentation review for completeness. Verified data have been checked for a variety of factors, including transcription errors, correct application of dilution factors, appropriate reporting of dry weight versus wet weight results, and correct application of conversion factors. Verification of data may also include laboratory qualifiers, if assigned. Data verification should occur in the field and the laboratory at each level (i.e., all personnel should verify their own work)and as information is passed from one level to the next(i.e., supervisors should verify the information produced by their staff). Records commonly examined during the verification process include field and sample collection logs, chain-of-custody forms, sample preparation logs, instrument logs, raw data, and calculation worksheets. In addition, laboratory personnel will verify that the measurement process was"in control"(i.e., all specified data quality objectives were met or acceptable deviations explained)for each batch of samples before proceeding with the analysis of a subsequent batch. Each laboratory will also establish a system for detecting and reducing transcription and/or calculation errors prior to reporting data. 24. Data Validation In general, data validation involves identifying project requirements, obtaining the documents and CCWTMP QAPP 73 May 30,2008 Revision 2 records produced during data verification, evaluating the quality of the data generated, and determining whether project requirements were met. The main focus of data validation is determining data quality in terms of accomplishment of measurement quality objectives(i.e., meeting QC acceptance criteria). Data quality indicators, such as precision, accuracy, sensitivity, representativeness, and completeness, are typically used as expressions of data quality. The Project QA Manager, or designee, will review verified sample results for the data set as a whole, including laboratory qualifiers, summarize data and QC deficiencies and evaluate the impact on overall data quality, assign data validation qualifiers as necessary, and prepare an analytical data validation report. The validation process applies to both field and laboratory data. In addition to the data quality objectives presented in Table 14,the standard data validation procedures documented in the analyzing laboratory's QA Manual will be used to accept, reject or qualify the data generated. The laboratory will submit only data that have met data quality objectives, or data that have acceptable deviations explained. When QC requirements have not been met, the samples will be reanalyzed when possible, and only the results of the reanalysis will be submitted, provided that they are acceptable. Each laboratory's QA Officer is responsible for validating the data it generates. E. AMENDMENTS TO QAPP The intent of this section is to provide a place within the QAPP to document significant additions, deletions and revisions to the approved QAPP and to provide the rationale for changes. A Draft QAPP was submitted by Stakeholders on September 26, 2006 to meet the Toxicity and OCs TMDLs BPA deadlines. Comments provided by the Regional Board were incorporated into an August 15, 2007 Draft, which was approved by the Regional Board on October 15, 2007. Revision 1:August 15, 2007 Major revisions include: • Revised Program Management structure to reflect MOA. • Changes based on the April 24, 2007 comment letter from the Los Angeles Regional Water Quality Control Board identified in the Response to Comments matrix(Appendix 1). • Included a Nutrient Investigation component. • Updated Project Schedule and Year 1 project deliverable schedule presented in Table 4. • Updated sediment toxicity identification evaluation (TIE)discussion to reflect recent advancements on whole sediment TIE procedures. Revisions contained in this version of the QAPP represent Revision 2 of the Draft QAPP and are intended to incorporate the monitoring provisions of the Metals TMDL. The Draft QAPP will be finalized upon approval of the revisions to the QAPP that pertain to the Metals TMDL. Revision 2: May 30, 2008 Major revisions include: • Incorporated monitoring provisions of the Metals TMDL. • Updated Project Schedule and Year 1 project deliverable schedule presented in Table 4. �b• CCWTMP QAPP 74 May 30,2008 Revision 2 F. REFERENCES Anderson, T. D. and Lydy, M. J. 2002. Increased toxicity to invertebrates associated with a mixture of atrazine and organophosphate insecticides. Environ. Tox. and Chem. V21, No. 7, 1507-1514. Bailey, H.C., DiGiorgio, C., Kroll, K., Miller, J.L., Hinton, D.E., Starrett, G. 1996. Development of Procedures for Identifying Pesticide Toxicity in Ambient Waters: Carbofuran, Diazinon, Chlorpyrifos. Environ. Tox. and Chem. V15, No. 6, 837-845. California Department of Fish and Game (CDFG). 2000. Standard Operating Procedures for Fish Tissue Sample Collection and Preparation: Sampling and Processing Trace Metal and Synthetic Organic Samples of Marine and Freshwater Fish. Method 102. CDFG Marine Pollution Studies Laboratory. July 2000. Larry Walker Associates(LWA). 2000. Guidance Manual: Stormwater Monitoring Protocols, 2nd Edition. Caltrans document No. CTSW-RT-00-005. Larry Walker Associates(LWA). 2006. Ventura County Agricultural Irrigated Lands Group (VCAILG) Quality Assurance Project Plan. August 3, 2006 [Revision 11. Resource Management Associates, Inc. (RMA). 2003. FINAL REPORT Mugu Lagoon Numerical Model Development. Prepared for: U.S. Army Corps of Engineers Los Angeles District under �..- subcontract to Coastal Frontiers Corporation. May 2003. State Water Resources Control Board (SWRCB). 1998. Sediment Chemistry, Toxicity, and Benthic Community Conditions in Selected Water Bodies of the Los Angeles Region- Final Report..August 1998. State Water Resources Control Board (SWRCB). 2004a. Surface Water Ambient Monitoring Program, SWAMP-Compatible Quality Assurance Project Plans. March 2004. State Water Resources Control Board (SWRCB). 2004b. Surface Water Ambient Monitoring Program, Checklist.April 2004. United States Environmental Protection Agency(USEPA). 1991. Methods for Aquatic Toxicity Identification Evaluations: Phase 1 Toxicity Characterization Procedures(Second Edition). EPA- 600/6-91/003. USEPA, Environmental Research Laboratory, Duluth, MN. United States Environmental Protection Agency(USEPA). 1992. Toxicity Identification Evaluation: Characterization of Chronically Toxic Effluents Phase I. EPA-600/6-91/005. USEPA, Office of Research and Development, Washington, D.C. CCWTMP QAPP 75 May 30,2008 Revision 2 United States Environmental Protection Agency(USEPA). 1993a. Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fourth Edition. EPA/600/4-90/027F. USEPA, Office of Research and Development,Washington, D.C. United States Environmental Protection Agency(USEPA). 1993b. Methods for Aquatic Toxicity Identification Evaluations: Phase II Toxicity Identification Procedures for Samples Exhibiting Acute and Chronic Toxicity. EPA/600/R-92/080. USEPA, Office of Research and Development, Washington, D.C. United States Environmental Protection Agency(USEPA). 1991. Sediment Toxicity Identification Evaluation: Phase I (Characterization), Phase II (Identification) and Phase III (Confirmation) Modifications of Effluent Procedures. EPA/600/6-91-007. USEPA, Environmental Research Laboratory, Duluth, MN. United States Environmental Protection Agency(USEPA). 1996. Marine Toxicity Identification Evaluation. Phase I Guidance Document EPA/600/R-96/054. USEPA, Office of Research and Development,Washington, D.C. United States Environmental Protection Agency(USEPA). 2000. Guidance for Assessing Chemical Contamination Data for Use in Fish Advisories, Volume 1, Fish Sampling and Analysis, Third Edition. EPA 823-B-00-007. USEPA Office of Water, Washington, D.C. November. United States Geological Survey(USGS). 1994. Guidelines for Collecting and Processing Samples of Stream Bed Sediment for Analysis of Trace Elements and Organic Contaminants for the National Water Quality Assessment Program. Weston, D.P., You, J.C., Lydy, M.J.. Distribution and Toxicity of Sediment-Associated Pesticides in Agriculture-Dominated Water Bodies of California's Central Valley. accepted for publication in Environ. Sci. &Technology. CCWTMP QAPP 76 May 30,2008 Revision 2 Exhibit E-1 - Metals Monitoring Plan Calleguas Creek Watershed Metals and Selenium Monitoring Program Exhibit E-1 June 26, 2007 Sam Unger Section Chief-Regional Programs Los Angeles Regional Water Quality Control Board 320 West 4th Street, Suite 200 Los Angeles,CA 90013-2343 Re: Calleguas Creek Watershed Metals and Selenium Monitoring Program Dear Mr. Unger, Attached to this letter is an approach to meeting the monitoring requirements outlined in the Basin Plan Amendment(BPA)for the Total Maximum Daily Load(TMDL)for Metals and Selenium in the Calleguas Creek, its Tributaries and Mugu Lagoon as adopted by the Los Angele$RegionalWater Quality Control Board on June 8,2006 and the State Water Resources Control Board on October 25,2006 and approved by USEPA on March 26,2007. The monitoring program presented in the Metals and Selenium BPA states that monitoring will begin within one year of the effective date of the TMDL. The implementation plan in the BPA requires that a monitoring program be submitted to the Regional Board Executive Officer within three months of the effective date of the TMDL,which is June 26,2007. The BPA identifies individual responsible parties, including POTWs,permitted stormwater dischargers(PSD),and agricultural dischargers. A group of these responsible parties,through the Calleguas Creek Watershed Management Plan(CCWMP)and the Water Quality/Water Resources Subcommittee, are developing a Memorandum of Agreement(MOA). The MOA will outline an agreement to implement monitoring programs to meet TMDL BPA requirements for the following parties: • City of Camarillo• Ventura County Waterworks District No. 1 • City of Moorpark•Camrosa Water District • City of Oxnard•Camarillo Sanitary District • City of Simi Valley •U.S. Department of the Navy • City of Thousand Oaks•California Department Of Transportation • County of Ventura•Farm Bureau Of Ventura County The aforementioned group has already submitted a Quality Assurance Project Plan(QAPP)for the CCW TMDL Monitoring Program(CCWTMP)to address the following TMDLs in the CCW: • Nitrogen Compounds and Related Effects in Calleguas Creek(Nitrogen TMDL) • Organochlorine(OC)Pesticides, Polychlorinated Biphenyls(PCBs)And Siltation In Calleguas Creek, its Tributaries,and Mugu Lagoon(OCs TMDL) • Toxicity,Chlorpyrifos, and Diazinon In The Calleguas Creek, its Tributaries and Mugu Lagoon(Toxicity TMDL) The attachment to this letter and subsequent revisions to the CCWTMP QAPP are intended to fulfill the TMDL monitoring requirements for only those parties which are part of the MOA or otherwise identified by the participants of the MOA. `.r The CCWTMP QAPP is intended to allow for the inclusion of additional monitoring requirements identified in the Metals and Selenium TMDL and as yet to be adopted TMDLs(e.g., Bacteria). The following Metals and Selenium TMDL Monitoring Approach will be incorporated into the CCWTMP QAPP once the current version of the QAPP addressing the Nitrogen,OCs, and Toxicity TMDLs has been approved by the Executive Officer of the Regional Board. The current version of the CCWTMP QAPP has been revised to address comments and will be submitted to the Regional Board shortly. Please contact Chris Minton(Larry Walker Associates)at(310)394-1036 if you have any questions or comments regarding the approach outlined in the attachment or the existing CCWTMP QAPP. Sincerely, Richard Hajas Chair, Calleguas Creek Watershed Management Plan MONITORING APPROACH TO FULFILL REQUIREMENTS FOR THE CALLEGUAS CREEK WATERSHED METALS AND SELENIUM TMDL The following Monitoring Approach is intended to outline an approach to meeting the monitoring requirements presented in the Metals and Selenium TMDL BPA and will be incorporated into the CCWTMP QAPP during future revisions of that document. Monitoring Questions The Metals and Selenium TMDL portion of the CCWTMP is designed to monitor and evaluate the implementation of the TMDL and refine the understanding of metal and selenium loads. The Monitoring Approach is intended to parallel efforts of three TMDLs currently addressed by the CCWTMP QAPP as described above. The goals of the Metals and Selenium portion of the CCWTMP include: (1) To determine compliance with copper,mercury,nickel,and selenium numeric targets at receiving water monitoring stations and at POTW discharges; (2) To determine compliance with waste load and load allocations for copper,mercury, nickel,and selenium at receiving water monitoring stations and at POTW discharges; (3) To monitor the effect of implementation action by PSDs,POTW,agricultural dischargers,and other NPDES permittees on in-stream water quality;and (4) To implement the CCWTMP in a manner consistent with other TMDL implementation plans and regulatory actions within the Calleguas Creek Watershed. -.- The Monitoring Approach is intended to answer the following monitoring questions to meet the goals of the program: 1. Are numeric targets and allocations met at the locations indicated in the TMDLs? 2. Are conditions improving? 3. What is the contribution of constituents of concern from various land use types? Per the Metals and Selenium TMDL BPA,water and sediment samples collected in the first year will be analyzed to address the monitoring goals and questions. During the first year bird egg and fish tissue monitoring will be considered for incorporation into the CCWTMP to further evaluate potential impacts of metals and selenium on the environment; however,it is not required at this time and may not occur until future years of the monitoring program. Data collected through the CCWTMP will be used in conjunction with historic data to evaluate whether conditions are improving. Land use sites data will be used to evaluate the contribution of metals and selenium from each type of land use. Lastly,data will be used to evaluate the CCWTMP's effectiveness at answering the monitoring questions and provide guidance for modifications. To the extent monitoring required by the Metals and Selenium TMDL Monitoring Approach parallels monitoring required by the Conditional Waiver for Discharges from Irrigated Lands (Conditional Waiver Program), monitoring shall be coordinated with monitoring conducted by individuals and groups subject to the terns and conditions of the Conditional Waiver Program. Project Description The primary purpose of the Monitoring Approach and ultimately the revisions to the QAPP is to outline the process for collecting data to meet the goals of the CCWTMP. Data collected through CCW Metals and Selenium TMDL 1 June 26,2007 Monitoring Approach previous studies were compiled for use in developing the TMDLs and will be considered along �.. with data collected through the CCWTMP. Monitoring is currently being undertaken by various groups including participants in the Ventura County Agricultural Irrigated Lands Group (VCAILG)under the Conditional Waiver Program and NPDES POTW and MS4 Permittees. Additionally,the Nutrients,Toxicity, OCs,and Metals and Selenium TMDL Implementation Plans call for special studies to be completed to investigate a range of issues. The CCWTMP provides a means for integration of the information. Data collected through the Conditional Waiver Program,NPDES POTW and MS4 permittees,and special studies will be incorporated to the extent practicable. The extent practicable will be dictated by the cost of gathering and compiling information from outside programs. It is not the intent or purpose of the CCWTMP to compile and analyze all available data. The Metals and Selenium TMDL Monitoring Approach identifies two categories of monitoring: • Required—required monitoring is intended to determine compliance with the TMDL and meet the BPA monitoring requirements. • Special studies—special studies monitoring is intended to address sample collection for special studies identified in the BPA or developed through other processes. The CCWTMP QAPP provides information on sample collection and analysis methodologies relevant to all categories of monitoring. Required Monitoring Elements The following environmental monitoring elements are required in the Metals and Selenium BPAs for the first year of monitoring and will be included in the CCWTMP QAPP: • General Water Quality Constituents(GWQC) • Metals and Selenium in water and sediment • Sediment Toxicity Table 1 lists the constituents for which analysis will be conducted,all of which are considered critical. Table 1 also provides a general sampling frequency. Table 1. Constituents and Monitoring Frequency for Metals and Selenium Constituent Frequency General Water Quality Constituents(GWQC) Flow,pH,Temperature,Dissolved Oxygen, Monthly Conductivity,Total Suspended Solids(TSS),Hardness in freshwater,and Dissolved Organic Carbon(DOC)in seawater Metals and Selenium in Fresh Water and Seawater Monthly Copper,Mercury,Nickel,Zinc and Selenium (Quarterly in Mugu Lagoon) Chronic Sediment Toxicity Once Every Three Years General Sediment Quality Constituents(GSQC) Once Every Thee Years Total Ammonia,Percent Moisture,and Grain Size Analysis Metals and Selenium in Sediment Copper,Mercury,Nickel,Zinc and Selenium' Once Every Three Years 1 Copper,mercury,nickel,and zinc will be measured as dissolved and total recoverable. CCW Metals and Selenium TMDL 2 June 26,2007 Monitoring Approach Special Studies The Metals TMDL Implementation Plan identifies special studies to investigate a range of issues. No specific special studies are incorporated into this Monitoring Approach or the current CCWTMP QAPP at this time; however,a summary of special studies that may be incorporated at a later date are provided below. Work Plans for special studies will be submitted to the Regional Board Executive Officer for approval per the BPAs. Metals TMDL Special Studies • Evaluation and Initiation of Natural Sources Exclusion. • Identification of Selenium Contaminated Groundwater Sources. • Investigation of Soil Concentrations and Identifications of"Hot Spots". • Determination of Water-Effect Ratio for Copper in Revolon Slough. • Determination of Site-Specific Objectives for Mercury and Selenium. Project Schedule The effective date of the Metals and Selenium TMDL is March 26,2007. Per the BPA, responsible parties must submit a workplan for a monitoring program for approval by the Regional Board Executive Officer(EO)three months after the effective date,which is June 26, 2007. Table 2 outlines the deliverable schedule for the first year of monitoring. However,this schedule assumes EO approval of the monitoring program within one month of the submittal of a revised version of the QAPP that incorporates this monitoring approach. If EO approval is delayed,the project deliverable schedule will be modified. The annual report for the first year of monitoring will be submitted so that it encompasses a single water year(October through September). In the case of the first year of monitoring, if monitoring were to be initiated in October 2007,as presented in Table 2,the first year annual report would be submitted in February 2009. Table 2.Year 1 Project Deliverable Schedule for CCWTMP Deliverable Anticipated Date Of Anticipated Date Of Initiation Completion Revised CCWTMP QAPP Incorporating May 2007 July 2007 _Metals and Selenium Monitoring Approach I'Cycle of Monitoring October 2007 September 30,2008 Review of I'set of data November 2007 December 31,2008 I'Annual Report December 31,2008 February 27,2009 1 Monitoring must be initiated within three months after EO approval of the QAPP. All dates after QAPP submission will be tied to EO approval. 2 Data will be delivered in an electronic format along with the Annual Report. Quality Objectives and Criteria for Measurement Data The objective of the Monitoring Approach,in terms of data quality,is to produce data that represent as closely as possible, in situ conditions of the CCW. This objective will be achieved by using accepted methods for sample collection and laboratory analysis. Assessing the approach's ability to meet this objective will be accomplished by evaluating the resulting laboratory measurements in terms of reporting limits,precision, accuracy,representativeness, comparability,and completeness. Quality objectives for constituents unique to Metals and Selenium TMDL monitoring are presented in Table 3 as they are not presented in the CCWTMP {. QAPP. The remaining constituents listed in Table 1 are currently included in the CCWTMP `vr CCW Metals and Selenium TMDL 3 June 26,2007 Monitoring Approach QAPP and information on data quality objectives and criteria for measurement data can be found �.,. in that document. Table 3. Data Quality Objectives Target Constituent Accuracy Precision Recovery Reporting Limits Freshwater Copper' 70-130% 0-30% 70- 130% 1.0 ug/L Nickel' 70-130% 0-30% 70- 130% 0.5 ug/L Selenium 60-150% 0-30% 60-150% 0.5 ug/L Zinc' 50-150% 0-30% 50- 150% 0.5 ug/L Mercury' 60-140% 0-30% 60- 140% 0.002 ug/L. Seawater Dissolved Organic Carbon 95-105% 0-25% 95- 105% 0.5 mg/L Copper' 55-120% 0-30% 55-120% 0.5 ug/L Nickel 50-120% 0-30% 50- 120% 0.5 ug/L Selenium 50-110% 0-30% 50- 110% 1 ug/L Zinc 45-105% 0-30% 45- 105% 1 ug/L Mercury 60-140% 0-30% 60- 140% 0.001 ug/L Sediment Mercury 65-140% 0-30% 65- 140% 0.05 ug/dry g Selenium 60-125% 0-30% 60- 125% 0.05 ug/dry g 1 Measured as dissolved and total recoverable. Training and Certification No specialized training or certifications are required for sampling personnel. However,staff that will perform field sampling should receive annual refresher training to ensure the samples are collected correctly and safely. The Project Manager, or designee,will provide training prior to initiation of sampling and will document training of staff. Documentation will consist of a sign in sheet,time and date,and instructor. The documentation will be maintained in the project files of the Project Manager. All sampling shall be performed under the supervision of experienced staff. No volunteers will be used for sampling. At minimum,laboratories selected to perform analysis for this program must maintain current certification through the California Department of Health Services-Environmental Laboratory Accreditation Program(ELAP)or the National Environmental Laboratory Accreditation Program (NELAP). Pacific EcoRisk(toxicity testing laboratory)and CRG marine laboratories(chemistry laboratory)are both certified by the NELAP;their certificate numbers are 04225CA and 2261, respectively. Any additional laboratories used to conduct analysis on CCWTMP samples will be accredited by ELAP and/or NELAP and meet the requirements outlined in the QAPP. Toxicity and chemistry laboratories are required to maintain records of analyst training and will make these records available upon request. Sampling Process Design The following section provides a description and justification for the sampling design strategy and site selection. The primary driver in designing the monitoring is to meet the monitoring requirements of the Metals and Selenium TMDL Implementation Plan. In addition to the monitoring sites sampled as part of the CCWTMP,an effort will be made to obtain data from CCW Metals and Selenium TMDL 4 June 26,2007 Monitoring Approach other monitoring programs in the watershed. Element 18 of the CCWTMP QAPP describes the process for including data collected through other programs. These programs include NPDES permitted entities and Conditional Waiver Program participants. It is the desire of the responsible entities to avoid duplicative sampling efforts and additional coordination will occur as each program develops. Changes to aspects of the sampling process design related to meeting the monitoring requirements of the TMDL BPA will be recommended in the annual report to the Management Committee identified in Element 4 of the CCWTMP QAPP and the Regional Board Project Manager. Additional changes may be required in the future,dependent on the results of toxicity identification evaluations(TIEs),or other unforeseen reasons. In these cases,the CCWTMP QAPP will be amended to provide adequate guidance,as necessary. Compliance Monitoring For compliance monitoring, in-stream water column samples at freshwater locations will be collected monthly for analysis of general water quality constituents(GWQC),copper,mercury, nickel,selenium, and zinc. Water column samples in Mugu Lagoon will be collected quarterly. Note that the BPA did not contain any requirements to collect samples within the lagoon except at the Ronald Regan St Bridge(formally 1 l St). In-stream water column samples to measure compliance will generally be collected at the base of each of the subwatersheds assigned waste load and load allocations,per the BPA. Site selection procedures and the locations of the compliance monitoring sampling stations are discussed in subsequent sections. Toxicity identification evaluations(TIEs)will be conducted on toxic samples as outlined in the toxicity testing and TIE section of Element 13 of the CCWTMP QAPP. POTW effluent will be monitored for compliance with the effluent limits presented in the BPA. Environmentally relevant detection limits will be used to the extent practicable. Detection limits will be the lower of either the allocations or the numeric targets presented in the BPA, if attainable at a commercial laboratory through standard analytical techniques. All efforts will be made to include two wet weather water sampling events for compliance monitoring during targeted storm events between October and April. Wet weather events will be conducted as the monthly and quarterly events and are not in addition to these events. Wet weather sampling conditions are discussed in the sampling schedule section of the CCWTMP QAPP. Wet weather water samples will not be collected at POTWs as POTW effluent during wet weather was not identified as a significant source of constituents identified in the TMDL. Sediment samples will be collected in Mugu Lagoon once every three years for analysis of sediment toxicity,general sediment quality constituents(GSQC),and copper,mercury,nickel, selenium,and zinc. A frequency of every three years was selected for Mugu Lagoon sediment sampling due to the relatively slow sedimentation rates in the lagoon. A model developed to simulate hydrodynamics and sediment transport in Mugu Lagoon estimated sedimentation deposition rates which varied across the lagoon from less than 0.6 to greater than 3 centimeters (cm)per year(RMA,2003). Collection of sediment samples,which for most parameters occurs in the top two to three cm,would exceed annual deposition rates within portions of the lagoon resulting in the characterization of current and historic deposits. The time period represented in samples would vary from site to site based on deposition rates. In addition,pollutants identified as causing toxicity may be related to historic deposits. Although identifying the presence and cause of toxicity,even if related to historic deposits,provides information on current conditions in the lagoon it does not provide the information needed to implement or modify BMPs. CCW Metals and Selenium TMDL 5 June 26,2007 Monitoring Approach Sampling Sites Compliance monitoring sampling sites for the Metals and Selenium TMDLs are located in Mugu Lagoon,upstream of the base of the Revolon Slough and Calleguas subwatersheds and at the relevant POTW effluent discharge locations. In the case of the Revolon Slough and Calleguas subwatersheds,compliance monitoring sampling sites are located upstream of the base of the subwatersheds as 1)these locations are not tidally influenced and 2)the majority of the metals and selenium data in these subwatersheds have been collected at the upstream locations. Compliance monitoring sampling sites for sediment toxicity are located in Mugu Lagoon. In the case of the Mugu Lagoon subwatershed,compliance with water targets will be measured at the base of the upstream subwatersheds to the lagoon and at several sites within the lagoon. Compliance with sediment targets will be measured in several zones throughout the lagoon in subtidal areas that consistently maintain a salinity level of greater than 25 ppt. Sediment sampling zones were located in subtidal areas with salinity level of greater than 25 ppt so that data could be compared to the California sediment quality objectives,which are currently under development. Because of shifting shoals and sand bars in the lagoon,sediment samples will be collected from the deepest part of the channel in the sampling zones instead of reoccupying stations based only on GPS coordinates. Table 4 presents information on compliance monitoring sites and sample collection frequency. Figure 1 presents the general location of the POTW and effluent discharge sites and receiving water compliance monitoring sites for water. Figure 2 presents the general locations of the compliance monitoring zones in Mugu Lagoon. Agricultural and urban discharge land use sampling stations are located in the three subwatersheds. Land use sampling stations are generally located at a point where water from a representative group of similar land uses discharges to one of the major reaches of the CCW in the three subwatersheds. Land use sampling sites coincide with current and previous sampling programs in the CCW,where available. Figure 3 presents the general locations of the land use sampling sites in the CCW. Table 5 presents land use sampling stations and sampling frequency. The process for selection of appropriate sites was based on location within a subwatershed for which waste loads and loads were allocated,existing data,and access considerations. Current or previously used sampling sites were selected whenever practical to save time and resources,and to provide historical data. Selecting sites previously or currently in use for other monitoring efforts ensures that sites are easily accessible and maximizes opportunities for future cost sharing. Waste load and load allocations were assigned by subwatersheds in the metals and selenium TMDL. Accordingly,at least one compliance monitoring site is located in each subwatershed assigned waste load and load allocations. The number and location of sites may be revised if existing sites become inaccessible, if it is determined that alternative locations are needed,or if the number of land use stations needed to appropriately characterize discharges needs modification. At such a time as numeric targets are consistently met,an additional site or sites within the subwatershed will be considered for monitoring to ensure allocations are met throughout the subwatershed. Any changes with regard to the number and location of sites will be determined through discussions between the Project Manager, Project QA Manager, field staff,and the Regional Board Project Manager and will be documented in the annual report. Sites are identified with a unique identification code to assist in identifying the location and purpose of the site and to ensure results are properly assigned. Sites are identified such that the CCW Metals and Selenium TMDL 6 June 26,2007 Monitoring Approach reach, location identifier(such as a cross street, where available),and site type(receiving water, �✓ discharge,or tributary)can be distinguished. The format for site id codes is##X AAAA, where: • ##indicates the reach in which the site is located,or in the case of a discharge or tributary sites,the reach to which the discharge or tributary drains to. • Xidentifies whether the site is a discharge site(D), and tributary site(T),or a receiving water site(in which case no identifier is used). • AAAA indicates the cross street, where available, such as Wood for Wood Road on the Oxnard Plain. In some instances a cross street is not available and another location identifier is used to provide an indication of site location. Appendix A of the CCWTMP QAPP presents detailed descriptions of and directions to the sampling sites identified in this plan. CCW Metals and Selenium TMDL 7 June 26, 2007 Monitoring Approach Table 4. CCWTMP Compliance Monitoring Sites and Annual Sampling Frequency Subwatershed Site ID Reach Site Location GPS Coordinates Water Sediment Lat Long Metals GWQC Tox Metals GSQC 01 RR BR 1 Ronald Reagan St Bridge 34.109 -119.0916 12 12 NA NA NA 01—BPT 3 1 Located in Eastern Arm General site locations 4 4 O1—BPT 6 1 Located in Eastern Part of Western Arm are provided as each 4 4 Mugu Lagoon Located in the Central Part of the site represents a O L_BPT_14 1 Western Arm generalized sample 4 4 Once Every Three Years O1_BPT_15 1 Located in Central Lagoon collection zone in NA NA Located In Central Lagoon,South of Which a sample will be 01_SG_74 I Drain#7 collected. 4 4 Revolon Revolon Slough East Side of Wood Slou h 04 WOOD 4 Road 34.1703 -119.0953 12 12 NA NA NA g — 03_UNIV 3 Calleguas Creek at University Drive 34.1798 -119.0441 12 12 NA NA NA Calleguas 03D CAMR 3 Camrosa Water Reclamation Plant 34.1679 -119.053 12 12 NA NA NA 9AD_CAMA 9A Camarillo Water Reclamation Plant 34.1938 -119.0017 12 12 NA NA NA Conejo lOD HILL 10 Hill Canyon Wastewater Treatment 34.2131 -118.925 12 12 NA NA NA — Plant 1 Includes two wet events per site. NA—Not Analyzed Metals—total and dissolved copper,mercury,nickel,and zinc and total selenium GWQC—samples will be analyzed for general water parameters as listed in Table 1 GSQC—samples will be analyzed for general sediment parameters as listed in Table 1 Tox—samples will be analyzed for sediment toxicity i i i i CCW Metals and Selenium TMDL 8 June 26, 2007 Monitoring Approach i Table 5. CCWTMP Land Use Monitoring Sites and Sample Frequency Subwatershed Site ID Reach Site GPS Coordinates Site Location Metals GWQC' Types Lat Long Mugu Lagoon O1T ODD2_DCH 1 Ag Duck Pond/Mugu/Oxnard Drain#2 S.of Hueneme Rd 34.1395 -119.1183 12 12 04D WOOD 4 Ag Agricultural Drain on E.Side of Wood 34.1707 -119.096 12 12 Revolon — Rd N.of Revolon Slough 04D VENTURA 4 Urban Camarillo Hills Drain at Ventura Blvd 34.2161 -1 L9.0675 12 12 and Las Posas Rd At VCWPD Gage 835 Calleguas 02D—BROOM 2 Ag Discharge to Calleguas Creek at Broome 34.1434 -119.0711 12 12 Ranch Rd. 9BD_GERRY 9B Ag Drainage Ditch crossing Santa Rosa Rd 34.2369 -118.9473 12 12 at Gerry Rd Conejo Urban Storm Drain passing under N. 9BD_ADOLF 9B Urban side of Adolfo Rd approximately 300 34.2148 -118.9951 12 12 meters from Reach 9B Ag=Agricultural Land Use Station Urban=Urban Land Use Station 1 Includes two wet events per site. Metals—total and dissolved copper,mercury,nickel,and zinc and total selenium GWQC—samples will be analyzed for general parameters as listed in Table 1 Station IDs indicated in bold type represent CCWTMP sites that correspond to sites identified in the Ventura County Irrigated Lands Group QAPP(LWA 2006). i CCW Metals and Selenium TMDL 9 June 26,2007 Monitoring Approach n o n o � ooa m a � �Sy�] 08 u 178 r 0- z:;�, 06 05 9B 10 10D HILL 12 0 '9AD CAM 3 03 UNIV 04 00 04 03D CAMR tag 'ion 1 RR B 0 2.5 5 �o TT 1 I 1 Miles CCWTMP Metals and Selenium TMDL Monitoring Sampling Sites—Receiving Water and POTW CD, Subw_atersheds Arroyo Simi N y Las Posas Major Drainages Receiving Water Sampling Site Calle uas Major Roads v g Mugu Lagoon POTW Sampling Site Cornejo Revolon Slough Larry Walker Associates June,2007 Figure 1.CCWTMP Compliance Monitoring Sampling Sites—Receiving Water CCWTMP Metals and Selenium TMDL Monitoring Sampling Zones — Mugu Lagoon j' a9an St p , CL n CD CD f � I � M, � � - � � 01 RR_BR` \ 1 t~ .. F yf �X q!' r. 1 jt'' : '7".*••�+�._:1 %-,r ts:: ,. Q1 BPT j 01 BPT 15 1_BPT_06' f 4 01-SG-74 in 01_BPT03 O } s She Sediment { water -- -- - Sampling I Sampling 07 SG >4 01 aPT 3 X X 01-OPT-13 x x 01 8PT to X X 01 8PT 75 Mugu Lagoon Land Cover X N o RR __;.__ Notes: AGRICULTURE 1.Sediment sampling for toxicity,metals,and selenium. 2.Water sampling for metals and selenium. CD BEACHJDUNE/MUDFLAT 3.The tidal extent presented represents the subtidal areas.Sediment OPEN SPACE sampling zones are located in the subtidal areas so that data could be t 1 compared to the California Sediment Quality Objectives.Because of o DEVELOPED shifting shoals and sand bars,sediment samples will be collected from 0 0.25 0.5 Miles the deepest part of the channel in the sampling zones instead of MARSHLAND 1 I reoccupying stations based on GP5 coordinates. Larry Walker Associates dune,2Q07 Figure 2.CCWTNW Compliance Monitoring Sampling Zones—Mugu Lagoon Sediment n o f� o � CD vac :v Y �' -0 ty 2-s o n ,2 N o' Ds zaz; "1 05 1 za ,p RA 98� 9B AD L 12 N �l 3 0 D W O ,3 1T D2 DCH 02D B M '-27 j GO Jam``,J� O 0 2.5 5 � N t t r Miles ti C CD CCWTMP Metals and Selenium TMDL Land Use Sampling Sites —Agricultural and Urban Discharge t�) Subwatersheds Notes: Arroyo Simi Las Posas A Agricultural Discharge Sampling Site 1.Agricultural and Urban Discharge Sampling Sites are generally Sam Urban Dischar a O calleguas Mugu Lagoon V 9 piing Site located at a point where waterfrom a representative group of ' similar land uses discharges to one of the subwatershed reaches. Conejo Revolon Slough Major Drainages rg ---- Major Roads Larry Walker Associates June,200 Figure 3.CCWTMP Land Use Sampling Sites—Agricultural And Urban Discharge Sampling Schedule Water column samples shall be collected monthly in freshwater reaches and the entrance to Mugu Lagoon. Sites within the lagoon,which were not addressed in the BPA will be sampled quarterly. Table 6 presents the sampling schedule. Dates will be finalized during coordination with other monitoring efforts(NPDES POTW and Stormwater monitoring and the Conditional Waiver Program)in order to minimize duplication of effort and to develop a representative data set. All efforts will be made to include two additional wet weather water sampling events between October and April during targeted storm events,as described in the CCWTMP QAPP. Wet weather events will be conducted as the monthly and quarterly events and are not in addition to these events. Collection of land use and POTW samples will coincide with compliance monitoring and wet weather sampling events as outlined in Table 6. Sediment samples in Mugu Lagoon will be collected during July to coincide with a return to base flow conditions and to be consistent with similar efforts in California. The monitoring schedule will be revised if it does not appropriately characterize conditions in the watershed. Any changes with regard to the sample schedule will be determined through discussions between the CCWTMP QAPP Project Manager,Project QA Manager, field staff,and the Regional Board Project Manager and will be documented in the Annual Report. Table 6. Compliance and Toxicity Investigation Monitoring Schedules) Monthz Subwatershed Station ED Reach 01 RR BR 1 W W W W W W W W W W W W 01_BPT 3 1 W W W W Mugu Lagoon 01_BPT_6 1 W W W W 01BPT14 1 W W W W 01 BPT 15 1 S 01-SG-74 1 W W W,S W Revolon 04 WOOD 4 W W W W W W W W W W W W 03 LNIV 3 W W W W W W W W W W W W Calleguas 03D CAMR 3 W W W W W W W W W W W W 9AD CAMA 9A W W W W W W W W W W W W Conejo 9AD CAMA 913 W W W W W W W W W W W W — 10D_ ULL 10 W W W W W W W W W W W W Media Type: W indicates water sample S indicates sediment sample 1 Collection of land use samples will coincide with compliance monitoring and wet weather sampling. 2 All attempts will be made to include two wet weather sampling events during the wet season(October through April). Sampling Methods Samples will be collected in a manner appropriate for the specific analytical methods to be used. Proper sampling techniques must be used to ensure that samples are representative of environmental conditions. Field personnel will adhere to established sample collection protocols ,,.. in order to ensure the collection of representative and uncontaminated(i.e.,contaminants not CCW Metals and Selenium TMDL 13 June 26,2007 Monitoring Approach introduced by the sample handling process itself)samples for laboratory analyses. Deviations from the standard protocols must be documented. Standard operating procedures(SOPs)for collection of samples are provided in Appendix C of the CCWTMP QAPP. Sample Handling and Custody Sampling handling and custody procedures are presented in detail in Element 12 of the CCWTMP QAPP. Sampling container,storage, preservation,and holding times for constituents specific to the Metals and Selenium TMDL are presented here as they are not presented in the CCWTMP QAPP. Sample Containers, Storage, Preservation, and Holding Times Sample containers must be pre-cleaned and certified free of contamination according to the USEPA specification for the appropriate methods. Sample container, storage and preservation, and holding time requirements for constituents unique to Metals and Selenium TMDL monitoring are presented in Table 7 as they are not presented in the CCWTMP QAPP. The remaining constituents listed in Table l are currently included in the CCWTMP QAPP and information on container,storage and preservation,and holding time requirements can be found in that document. The analytical laboratories will supply sample containers that already contain preservative(Table 7), including ultra pure hydrochloric and nitric acid,where applicable. After collection,samples will be stored at 4°C until arrival at the contract laboratory. Table 7. Sample Container,Volume,Initial Preservation,and Holding Time Requirements Immediate w Constituent Sample Container Sample Volume Processing And Holding Storage Time Freshwater Copperz Nickell polyethylene 250 mL store at 4 0c 48 hours Selenium Zinc2 Mercuryz glass 1 L store at 40c 48 hours Seawater Dissolved Organic Carbon polyethylene 250 mL store at 40c 28 days Copper' Nickel polyethylene 1 L store at 4 0c 48 hours Selenium Zinc Mercury glass 250 mL store at 40c 48 hours Sediment Mercury glass 8 oz jar store At 4 C 6 Months Selenium glass 8 oz jar store At 40C 6 Months 1 Additional volume may be required for QC analyses. 2 Measured as dissolved and total recoverable. Analytical Methods Aspects of analytical methods not specific to Metals and Selenium TMDL monitoring are presented in detail in the CCWTMP QAPP. Analytical methods,method detection limits CCW Metals and Selenium TMDL 14 June 26,2007 Monitoring Approach (MDLs), and reporting limits(RLs)required for samples analyzed for constituents unique to Metals and Selenium TMDL monitoring are summarized in Table 8. The remaining constituents listed in Table 1 are currently included in the CCWTMP QAPP and information on data quality objectives and criteria for measurement data can be found in that document. MDLs and RLs are discussed in more detail in the CCWTMP QAPP. Environmentally relevant detection limits will be used to the extent practicable. Table 8.Analytical Methods and Project Method Detection and Reporting Limits for Laboratory Analysis Constituent Method' Units Project MDL Project RL Freshwater Copper2 0.4 1.0 Nickell EPA 200.8 u 0.2 0.5 Selenium 0.2 0.5 ZinC2 0.1 0.5 Mercury2 EPA 1631 ug/L 0.0005 0.001 Seawater Dissolved Organic Carbon EPA 415.1 mg/L 0.1 0.5 Copper2 0.1 0.5 Nickell EPA 1640 u 0.1 0.5 Selenium 0.5 1 ZinC2 0.5 1 Mercury2 EPA 1631 ug/L 0.0005 0.001 Sediment Mercury EPA 6020 ug/dry g 0.01 0.05 Selenium EPA 6020 ug/dry g 0.03 0.05 MDL—Method Detection Limit RL—Reporting Limit NA—Not applicable 1 Standard Methods(SM)or EPA Method number 2 Measured as dissolved and total recoverable. Additional Information Additional information regarding various aspects of monitoring not covered in the Metals and Selenium TMDL Monitoring Approach are contained in the CCWTMP QAPP. The information provided in the Metals and Selenium TMDL Monitoring Approach is intended to compliment the CCWTMP QAPP. The CCWTMP QAPP was designed to allow for the inclusion of additional monitoring requirements identified in the Metals and Selenium TMDL. The approach outlined above will be incorporated into the CCWTMP once the current version of the QAPP addressing the Nitrogen,OCs,and Toxicity TMDLs has been approved by the Executive Officer of the Regional Board. The current version of the CCWTMP QAPP has been revised to address comments and will be submitted to the Regional Board shortly. CCW Metals and Selenium TMDL 15 June 26,2007 Monitoring Approach Exhibit E-2 - Salts Monitoring Plan Calleguas Creek Watershed Salts TMDL Monitoring Approach Exhibit E-2 CALLEGUAS CREEK A COOPERATIVE STRATEGY FOR RESOURCE MANAGEMENT & PROTECTION June 2, 2009 Eric Wu, Ph.D. Los Angeles Regional Water Quality Control Board 320 West 4th Street, Suite 200 Los Angeles, CA 90013-2343 • Calleguas Creek Watershed Salts TMDL Monitoring Approach Dear Dr. Wu: Attached to this letter is an approach to meeting the monitoring requirements outlined in the Basin Plan Amendment(BPA) for the Total Maximum Daily Load (TMDL)for Salts in the Calleguas Creek, its Tributaries and Mugu Lagoon as adopted by the Los Angeles Regional Water Quality Control Board on October 4, 2008, approved by the State Water Resources Control Board on May 20, 2008 and approved by USEPA on December 2,2008 (Hence "Effective"on that December 2, 2008). The monitoring program presented in the Salts BPA states that monitoring will begin within one year approval of the salts TMDL monitoring plan. The implementation plan in the BPA requires that a monitoring program be submitted to the Regional Board Executive Officer within six months of the effective date of the TMDL and monitoring will begin within one year of Executive Officer approval of the monitoring plan. The BPA identifies individual responsible parties, including POTWs,permitted stormwater dischargers(PSD), and agricultural dischargers. A group of these responsible parties, in coordination with the Calleguas Creek Watershed Management Plan (CCWMP)and the Water Quality/Water Resources Subcommittee, developed a Memorandum of Agreement(MOA). The MOA outlines an agreement to implement monitoring programs to meet TMDL BPA requirements for the following parties: ■ City of Camarillo ■ Ventura County Waterworks District No. 1 • ■ City of Moorpark ■ Camrosa Water District June 2,2009 Calleguas Creek Watershed Salts Monitoring Plan Page 2 of 2 City of Oxnard ■ Camarillo Sanitary District ■ City of Simi Valley ■ U.S. Department of the Navy ■ City of Thousand Oaks ■ California Department Of Transportation ■ County of Ventura ■ Ventura Agricultural Irrigated Lands Group These parties to the MOA have already submitted a Quality Assurance Project Plan (QAPP) for the Calleguas Creek watershed TMDL Monitoring Program(CCWTMP)to address the following TMDLs in the Calleguas Creek watershed: • Nitrogen Compounds and Related Effects in Calleguas Creek(Nitrogen TMDL) • Organochlorine(OC) Pesticides, Polychlorinated Biphenyls (PCBs) And Siltation In Calleguas Creek, its Tributaries,and Mugu Lagoon(OCs TMDL) • Toxicity, Chlorpyrifos,and Diazinon In The Calleguas Creek, its Tributaries and Mugu Lagoon (Toxicity TMDL) • Metals and Selenium in the Calleguas Creek, its Tributaries and Mugu Lagoon(Metals TMDL) The attachment to this letter outlines the general approach to fulfilling the requirements of the Salts TMDL monitoring. Subsequent revisions to the CCWTMP QAPP are intended to fulfill the TMDL monitoring requirements for only those parties which are part of the MOA or otherwise identified by the participants of the MOA. The CCWTMP QAPP is intended to allow for the inclusion of additional monitoring requirements identified in the Salts TMDL and as yet to be adopted future TMDLs as they become adopted. Once approved, the following Salts TMDL Monitoring Approach will be incorporated into the current version of the Executive Officer(EO)of the Regional Board approved CCWTMP QAPP. Please contact Kevin Coyne(Larry Walker Associates)at(805) 585-1835 if you have any questions or comments regarding the approach outlined in the attachment or the existing CCWTMP QAPP. Sincerely, Henry Graumlich Manager of Special Projects Calleguas Municipal Water District on behalf of the Parties Implementing TMDLs on the Calleguas Creek Watershed Attachments:Monitoring Approach for the Boron, Chloride, Sulfate, and TDS(Salts) Total Maximum Daily Loads and Feasibility Study for Continuous Monitoring Devices, June 2, 2009. June 2, 2009 DRAFT Calleguas Creek Watershed Management Plan Monitoring Approach for the Boron, Chloride, Sulfate, and TDS (Salts) Total Maximum Daily Loads submitted to Los Angeles Regional Water Quality Control Board prepared by LARRY WALKER ASSOCIATES on behalf of the CALLEGUAS CREEK WATERSHED MANAGEMENT PLAN WATER QUALITY/WATER RESOURCES SUBCOMMITTEE I Introduction The following is intended to outline an approach to meeting the monitoring requirements �.. presented in the Total Maximum Daily Load for Boron, Chloride, Sulfate, and TDS (herein referred to as the Salts TMDL) in the Calleguas Creek Watershed Basin Plan Amendment(BPA). The Salts TMDL Monitoring Approach will be incorporated into the Calleguas Creek Watershed TMDL Monitoring Program(CCWTMP)Quality Assurance Project Plan(QAPP)during future revisions of that document/upon approval of approach by Regional Board Executive Officer (EO). 2 Monitoring Questions The Salts TMDL portion of the CCWTMP is designed to monitor and evaluate the implementation of the TMDL. The Monitoring Approach is intended to parallel efforts of the four TMDLs currently addressed by the CCWTMP QAPP. The goals of the Salts TMDL portion of the CCWTMP include: • To determine compliance with numeric targets,waste load and load allocations. • To track and determine compliance with a salt balance in the watershed. • To generate additional land use runoff data to better understand pollutant sources and proportional contributions from various land use types. • To monitor the effect of implementation actions by urban, POTW,and agricultural dischargers on water quality. • To implement the program consistent with other regulatory actions within the CCW. The CCWTMP is intended to answer the following monitoring questions to meet the goals of the �,.. program: • Are numeric targets and allocations met at the locations indicated in the TMDLs? • Are conditions improving? • What is the contribution of constituents of concern from various land use types? The approach to evaluating the implementation of the Salts TMDL is slightly different than the previous TMDLs in that to ensure the goal of a salts balance in the watershed is being achieved and water quality objectives are being met, a comprehensive method of evaluating compliance with objectives and tracking inputs and outputs to the watershed will be utilized. As such,the following monitoring approach contains two components: 1. Target Compliance Monitoring—Target compliance monitoring will focus on evaluating attainment with targets and allocations at key locations where beneficial uses occur in the watershed. Load information will be collected at these sites to determine allocation compliance and to track the output of salts in the watershed for the salt balance monitoring. 2. Salt Balance Monitoring—Salt balance monitoring will track inputs and outputs of salts in the watershed. Input tracking information will focus on sources of salts to the watershed, including imported water state water, groundwater pumping activities, water softeners, POTW treatment chemicals, and other household salt additions in the DRAFT CCW Salts TMDL 2 June 2,2009 Monitoring Approach watershed. Load information from the target compliance monitoring locations will be used to determine the outputs from the watershed. �.,.- Salts data collected through the CCWTMP will be used in conjunction with historic data to evaluate whether conditions are improving. Land use sites data will be used to evaluate the contribution of salts from each type of land use. Lastly, data will be used to evaluate the CCWTMP's effectiveness at answering the monitoring questions and provide guidance for modifications. To fully evaluate the loads and salt balance component of the TMDL, monitoring approaches that differ from the current monitoring effort associated with the other TMDLs will be required. The Salts BPA indicates that composite sampling equipment will be used for the salt balance monitoring. However, since the time of TMDL development,continuous monitoring equipment has become available that may provide data more appropriate to the nature of this impairment, and better answer the monitoring questions. However,the use of the continuous monitoring equipment requires evaluation prior to full scale implementation as part of this monitoring program. As such,a feasibility study(discussed further in Attachment A)will be conducted to determine the final monitoring approach. At this time, it is assumed that the continuous monitoring equipment will be used to evaluate loads and the salt balance component of the TMDL. Therefore,the use of these devices and the corresponded data will be discussed further in this document. However, it is possible that alternative methods for monitoring loads and the salt balance will need to be identified prior to the initiation of the monitoring under this approach. If that is the case, an addendum to the monitoring approach (or QAPP)will be submitted prior to the initiation of monitoring. To the extent monitoring required by the Salts TMDL Monitoring Approach parallels monitoring required by the Conditional Waiver for Discharges from Irrigated Lands (Conditional Waiver Program), monitoring shall be coordinated with monitoring conducted by individuals and groups subject to the terms and conditions of the Conditional Waiver Program. Coordination will also be explored with any parallel efforts associated with the new Ventura County MS4 Monitoring Program. 3 Project Description The primary purpose of the Salts TMDL Monitoring Approach and ultimately the revisions to the QAPP is to outline the process for collecting data to meet the goals of the CCWTMP. Data collected through previous studies were compiled for use in developing the TMDLs and will be considered along with data collected through the CCWTMP. Monitoring is currently being undertaken by various groups including participants in the Ventura County Agricultural Irrigated Lands Group(VCAILG) under the Conditional Waiver Program and NPDES, POTW,and MS4 Permittees. Additionally,the Nutrients, Toxicity, OCs,and Metals and Selenium TMDL Implementation Plans call for special studies to be completed to investigate a range of issues. The CCWTMP provides a means for integration of the information. Data collected through the Conditional Waiver Program,NPDES POTW and MS4 permittees, and special studies will be incorporated to the extent practicable. The extent practicable will be dictated by the cost of gathering and compiling information from outside programs. Element 18 of the CCWTMP DRAFT CCW Salts TMDL 3 June 2,2009 Monitoring Approach QAPP describes the process for including data collected through other programs. It is not the intent or purpose of the CCWTMP to compile and analyze all available data. The Salts TMDL Monitoring Approach identifies two categories of monitoring: • Required—required monitoring is intended to determine compliance with the TMDL and meet the BPA monitoring requirements. Both Target Compliance Monitoring and Salt Balance Monitoring are considered required elements of the Salts TMDL Monitoring Approach. • Special Studies—special studies monitoring is intended to address sample collection for special studies identified in the BPA or developed through other processes. The CCWTMP QAPP provides information on sample collection and analysis methodologies relevant to all categories of monitoring. Once this Monitoring Approach is reviewed and approved,the elements of the Salts Monitoring Approach will be incorporated into the existing QAPP. 3.1 REQUIRED MONITORING ELEMENTS The following environmental monitoring elements are required in the Salts BPA and will be included in the CCWTMP QAPP: • General Water Quality Constituents(GWQC) • Salts Constituents(Chloride,Total Dissolved Solids [TDS],Boron, Sulfate) Table 1 lists the constituents for which analysis will be conducted,all of which are considered critical to the monitoring program. Table 1 also provides a general sampling frequency that will be followed for the target compliance salts monitoring portion of this effort. Table 1.Constituents and Required Monitoring Frequency for Salts TMDL Constituent Frequency Salts Constituents(Boron, Chloride, Sulfate, TDS) Monthly General Water Quality Constituents(GWQC) Flow, pH, Temperature, Dissolved Oxygen (DO), Monthly Conductivity,Total Suspended Solids(TSS) For the load and salt balance monitoring,continuous samplers may be utilized. The use of the continuous monitoring devices will allow for a greater frequency of sample collection. The minimum requirement,which is monthly, will be augmented with an increase of data,which may be reported in a variety of methods, including daily or weekly averages. The final reporting frequency of data will be further examined during the I" Year Feasibility Study associated with the installation of the continuous monitoring devices proposed in this approach. 3.2 SPECIAL STUDIES The Salts TMDL BPA identifies special studies to investigate a range of issues. No specific special studies are incorporated into this Monitoring Approach or the current CCWTMP QAPP �r DRAFT CCW Salts TMDL 4 June 2, 2009 Monitoring Approach at this time; however,a summary of special studies that may be incorporated at a later date are provided below. Work Plans for special studies will be submitted to the Regional Board Executive Officer for approval per the BPAs. Salts TMDL Special Studies • Develop Averaging Periods and Compliance Points • Develop Natural Background Exclusion • Develop Site-Specific Objectives • Develop Site-Specific Objectives for Drought Conditions • Develop Site-Specific Objectives for Sulfate 3.3 PROJECT SCHEDULE The effective date of the Salts TMDL is December 2,2008. Per the BPA,responsible parties must submit a workplan for a monitoring program for approval by the Regional Board Executive Officer(EO)six months after the effective date,which is June 2,2009. Table 2 outlines the deliverable schedule for development of the monitoring program, revisions to the QAPP, and conducting monitoring. This schedule assumes Regional Board staff review of the monitoring approach contained in this document within two months of submittal and incorporation of Regional Board comments into an updated QAPP within one month of receipt. If EO approval is delayed,the project deliverable schedule will be modified. Table 2.Year 1 Project Deliverable Schedule for CCWTMP Deliverable Anticipated Date Anticipated Date Of Of Initiation Completion Salts TMDL Monitoring Approach December 2008 June 2009 Revised CCWTMP QAPP Incorporating August 2009 September 2009 Salts TMDL Monitoring Approach Begin Monitoring' September 2010 1 Monitoring must be initiated within 12 months after EO approval of the QAPP. All dates after QAPP submission will be tied to EO approval. 2 Data will be delivered in an electronic format along with the Annual Report. 4 Data Quality Objectives and Criteria for Measurement The objective of the Salts Monitoring Approach, in terms of data quality, is to produce data that represent as closely as possible, in situ conditions of the CCW. This objective will be achieved by using accepted methods for sample collection and laboratory analysis. Assessing the approach's ability to meet this objective will be accomplished by evaluating the resulting laboratory measurements'in terms of reporting limits, precision, accuracy,representativeness, comparability, and completeness. Quality objectives for constituents unique to Salts TMDL monitoring are presented in Table 3 as they are not presented in the CCWTMP QAPP. The remaining constituents listed in Table 1 are currently included in the CCWTMP QAPP and information on data quality objectives and criteria for measurement data can be found in that document. DRAFT CCW Salts TMDL 5 June 2,2009 Monitoring Approach Table 3.Data Quality Objectives Target Constituent Accuracy Precision Recovery Reporting Limits Boron 80-120% 0-25% 80—120% 1.0 mg/L Chloride 80-120% 0-25% 80—120% 1.0 mg/L Sulfate 80-120% 0-25% 80—120% 1.0 mg/L Total Dissolved Solids 80-120% 0-25% 80—120% 1.0 mg/L Based on the results of the feasibility study, continuous monitoring devices may be installed at the compliance/load monitoring sites. The use of the devices in parallel with the monthly monitoring sampling approach will allow for some of the above constituents to be monitored at a much higher frequency then required and provide for assessment of the salt balance component of the TMDL (Currently,the continuously devices cannot monitor for Boron or Sulfate). For this approach,the required monthly"Grabs"will be collected but in the future, as data analysis is conducted and/or technology allows for all constituents to be monitored continuously,the QAPP may be revised to decrease the frequency of the monthly grab requirements if adequately addressed by the continuous monitoring devices. 5 Training and Certification No specialized training or certifications are required for sampling personnel conducting the monthly grab samples. However, staff that will perform field sampling should receive annual refresher training to ensure the samples are collected correctly and safely. The Project Manager, or designee, will provide training prior to initiation of sampling and will document training of staff. Documentation will consist of a sign in sheet,time and date, and instructor. The documentation will be maintained in the project files of the Project Manager. All sampling shall be performed under the supervision of experienced staff. No volunteers will be used for sampling. Field staff that will be installing,deploying, and maintaining the continuous monitoring devices will need to be sufficient trained in the standard operating procedures associated with the monitoring devices. Only staff training on the use and application of the continuous monitoring devices will be handling the units and performing any routine or emergency maintenance as needed. At minimum, laboratories selected to perform analysis for this program must maintain current certification through the California Department of Health Services—Environmental Laboratory Accreditation Program(ELAP)or the National Environmental Laboratory Accreditation Program(NELAP). CRG marine laboratories(chemistry laboratory) is certified by NELAP; their certificate numbers is 2261,respectively. Any additional laboratories used to conduct analysis on CCWTMP samples will be accredited by ELAP and/or NELAP and meet the requirements outlined in the QAPP. Chemistry laboratories are required to maintain records of analyst training and will make these records available upon request. DRIFT CC Salts TMDL 6 June 2,2009 Monitoring Approach 6 Sampling Process Design The following section provides a description and justification for the sampling design strategy and site selection. The primary driver in designing the monitoring is to meet the monitoring requirements of the Salts TMDL Implementation Plan. In addition to the monitoring sites sampled as part of the CCWTMP, as previously stated,efforts will be made to obtain data from other monitoring programs in the watershed. It is the desire of the responsible entities to avoid duplicative sampling efforts and additional coordination will occur as each program develops. Changes to aspects of the sampling process design related to meeting the monitoring requirements of the TMDL BPA will be recommended in the annual report to the Management Committee identified in Element 4 of the CCWTMP QAPP and the Regional Board Project Manager. 6.1 TARGET COMPLIANCE MONITORING Target compliance monitoring will focus on evaluating attainment with water quality objectives at key locations where beneficial uses occur in the watershed. Target compliance monitoring includes in-stream water quality samples and load measurements for compliance with allocations. For target compliance monitoring, in-stream water column samples will be collected monthly for analysis of general water quality constituents(GWQC)and the Salts TMDL constituents, including TDS,boron, sulfate, chloride. Additionally, flow measurements will be collected to allow for the calculation of loading. In conjunction with the monthly monitoring, continuous monitoring devices will be installed at the compliance monitoring locations to further evaluate loading and provide information for �.- calculating the output component of the salt balance. Currently,the continuous monitoring devices measure the following: • Electrical Conductivity (surrogate for TDS) • Chlorides • Flow(via depth) • Temperature • pH The monitoring devices currently do not reliably measure boron or sulfate, although technology is improving for these constituents and in the future may be added to the suite of constituents. Additionally,the devices measure electrical conductivity,not TDS. Therefore a relationship between TDS and conductivity in the watershed needs to be established. The monitoring devices will be collecting data at five minute intervals at the start of this monitoring effort yet the time interval may be modified as more data is collected and a more adequate frequency is identified. Collected data will be downloaded and electronically delivered to an Access database and will be available to complement the information obtained via the grab monitoring. Prior to the incorporation of the continuous monitoring devices into the required monitoring efforts,the CCWTMP stakeholders will conduct a 1St Year Feasibility Study to ensure the technology is appropriate for meeting the goals of the CCWTMP. The goals of the Feasibility Study are as follows: DRAFT CCW Salts TMDL 7 June 2, 2009 Monitoring Approach • Identify environmental challenges specific to the Calleguas Creek Watershed that may disrupt or inhibit the installation of a device at a monitoring location. • Calibrate the continuous monitoring devices to determine the precision and accuracy of the equipment and start to compile baseline data. • Identify relationships between sensor monitored constituents and TDS, sulfate and boron to see if conductivity and chloride are sufficient surrogates for salt balance monitoring. Although not required for EO approval, the CCWTMP stakeholders are willing to discuss and incorporate Regional Board staff comments/recommendations on the 1" Year Feasibility Study included in Attachment A. Should the feasibility study determine that the use of the continuous monitoring equipment is not appropriate for salt balance tracking,alternative monitoring methods will be submitted to the Regional Board prior to initiation of monitoring. For the purposes of the Salts TMDL,the CCW was divided into five subwatersheds that were used to assign numeric targets and allocations and to evaluate compliance with the TMDL. The subwatersheds are shown in Figure 1. The five subwatersheds(Simi, Las Posas, Conejo, Camarillo and Pleasant Valley)were developed based on ensuring protection of beneficial uses by defining the base of the subwatersheds(compliance points for the TMDL)at points where beneficial uses occur. . Additionally,the subwatersheds were developed specifically for this TMDL to group areas with related beneficial uses, sources of water, and uses of water for determining the salt balance and to provide consistency with implementation actions planned for the watershed. To measure compliance, in-stream water column samples will generally be collected at the base of each of the subwatersheds assigned waste load and load allocations. Site selection procedures and the locations of the compliance monitoring sampling stations are discussed in subsequent sections. POTW effluent will be monitored for compliance with the effluent limits presented in the BPA on a monthly basis. Environmentally relevant detection limits will be used to the extent practicable. Detection limits will be the lower of either the allocations or the numeric targets presented in the BPA, if attainable at a commercial laboratory through standard analytical techniques. Urban and Agricultural land use sites will be included in this effort to identify sources of salts attributed to specific land use types found in the CCW watershed and facilitate determining compliance with TMDL allocations. For each subwatershed being evaluated via this TMDL monitoring effort,all efforts will be made to monitor one urban and one agricultural site utilizing the same methods as for the compliance monitoring sites. All efforts will be made to include two wet weather water sampling events for compliance monitoring during targeted storm events between October and April. Wet weather events will be conducted in addition to the 12 monthly events. Wet weather sampling conditions are discussed in the sampling schedule section of the CCWTMP QAPP. DRAFT CCW Salts TMDL 8 June 2,2009 Monitoring Approach i • I 'Y Simi p Las Posas yew MoorPa+k wwr� Plea t Valley u Ca aril lo Conejo °� cartes rewn Y {Q rilA �O ew weer Calleguas Creek Watershed f Salts TMDL CompNance Pomb e POTWs Y' -Mator Roads su mterstwds Majar Drainages 0 2S 5 {T� i i _ Figure 1. CCW Salts TMDL sub-watersheds and corresponding compliance monitoring locations. 6.2 SALT BALANCE MONITORING Salt balance monitoring will focus on tracking input and outputs of salts in the watershed to ensure that the goal of a salts balance in the watershed is being achieved. 6.2.1 Input Tracking To evaluate whether a salts balance is attained in the watershed inputs will be tracked through four mechanisms: 1. State Water Project—provides information on the mass of salts brought into the watershed; 2. Santa Clara River(Freeman Division)—provides information on the mass of salts brought into the watershed; 3. Groundwater Pumping—provide information on the mass of salts imported into the watershed from deep aquifer pumping; 4. POTW Effluent—provides an estimate of the amount of salts added through human use of water from aforementioned sources. • DRAFT CCW Salts TMDL 9 June 2, 2009 Monitoring Approach Data from the first three mechanisms will not be generated through the QAPP(e.g. water quality and flow data will be generated through other programs and obtained for use). Data from the forth mechanism(POTW Effluent)will be generated through the QAPP or existing NPDES permit monitoring. Data for the four mechanisms that are not generated through the QAPP will be obtained from the sources presented in Table 4. Table 4.Sources of Salts Input Information to the Calleguas Creek Watershed Input Information Required Source of Information State Water Project volume and quality Calleguas Municipal Water District(CMWD) Santa Clara River(Freeman Diversion) volume and quality United Water Conservation District Groundwater pumping volume and quality CMWD/Water Purveyors, Fox Canyon Groundwater Management Agency POTW Effluent Individual POTWs in the CCW 6.2.2 Output Tracking Outputs from the watershed will be tracked through surface water monitoring at the compliance monitoring locations in the watershed and monitoring of discharges to the brine line.As stated previously, in-stream water column samples will be collected for general water quality constituents(GWQQ and the required Salts TMDL constituents(boron, chloride,sulfate, and TDS). For the Output tracking portion of this monitoring effort,the continuous monitoring devices will be utilized for determining compliance with this requirement, pending the results of the feasibility study. These continuous monitoring devices allow for an increased amount of data that is not available via typical grab or automated sampling methods. The use of the continuous monitors will; 1. Accurately measure small changes in loadings on a much smaller time scale than traditional grab sampling methods. Data will be collected on 5 - 15 minute intervals everyday of deployment and this time interval can be reduced if warranted. 2. Accurately measure seasonal changes with much higher confidence than traditional sampling methods. Analysis of the continuous monitoring data will greatly reduce the biases associated with typical grab sampling approaches to monitoring salts. Daily fluctuations can be identified and daily, weekly,monthly averages can be constructed at a much higher level and more will be more representative of the environmental conditions of the CCW. The proposed Feasibility Study (Attachment A)will cover include both a monitoring device and environmental calibration study prior to the required start of the compliance monitoring. 6.3 SAMPLING SITES The stations used to determine compliance with targets and allocations will also be used for output tracking. Monitoring sites for the Salts TMDL are located in the Simi, Conejo, Camarillo DRAFT CCW salts TMDL 10 June 2,2009 Monitoring Approach and Pleasant Valley subwatersheds(as defined in the Salts TMDL)and at the POTW effluent discharge locations. Representative agricultural and urban CCWTMP land use sites within each of the target subwatersheds will also be sampled(one each respectively). In the case of the Pleasant Valley subwatershed, compliance monitoring sampling sites on Revolon Slough and Calleguas Creek Reach 3 are located upstream of the base of the subwatershed as 1) these locations are located where salts objectives apply and 2)the majority of the salts data in these reaches have been collected at the upstream locations. Five sites have been identified as Compliance Monitoring locations, four of which coincide with existing CCWTMP monitoring sites: • Pleasant Valley/Revolon subwatershed-04 WOOD(Revolon Slough at Wood Rd) • Calleguas subwatershed-03 UNIV(Calleguas Creek at University Dr) • Arroyo Simi subwatershed-07 HITCH(Arroyo Simi at Hitch Bouldevard) • Camarillo subwatershed--9A HOWAR(Conejo Creek at Howard Rd) Specific details including GPS coordinates for the above listed sites and other constituents monitored at these locations is outlined in Table 6 of the existing QAPP. A fifth site has been identified as a compliance monitoring site specific to the Salts TMDL: • Conejo subwatershed-9B BARON- Baron Brothers Nursery (Behind facility @ the Ventura County Watershed Protection District [VCWPD] stream gauge). This location, behind Baron Brothers Nursery was suggested in the BPA as a potential location for a compliance location for this TMDL effort, and further investigations have found this site as an adequate location. Specific location details of this site will be incorporated into the QAPP in a similar format to the existing sites. After the first year of sampling it may be deemed that locations for sampling sites need to be modified and/or additional compliance monitoring locations are necessary. Any modifications to the sampling sites will be vetted through the standard process outlined in the QAPP, including Regional Board consultation prior to any changes. Land use monitoring will be conducted concurrently at representative agricultural and urban runoff discharge sites as well as at POTWs in the subwatersheds described above. The land use sites currently considered for this effort are as follows: • Pleasant Valley/Revolon subwatershed-04D WOOD (Revolon Slough at Wood Rd)- Agricultural Drain • Pleasant Valley/Revolon subwatershed-04D VENTURA(Camarillo Hills Drain at Las Posas Rd)- Urban Drain • Camarillo/Conejo subwatershed-9BD GERRY(Drainage Ditch at Gerry Rd)- Agricultural Drain • Camarillo subwatershed-9BD ADOLF(Drain passing under Adolph Rd) - Urban Drain • Conejo subwatershed- 13 SB HILL(Arroyo Conejo on S Side of W Hillcrest)-Urban Drain DRAFT Cc Salts TMDL 1! June 2, 2009 Monitoring Approach • Arroyo Simi subwatershed-07D HITCH LEVEE 2 (2nd Corrugated pipe discharging via the North side of the levee to the Arroyo Simi, upstream of Hitch Bouldevard)- Agricultural Drain �-- • Arroyo Simi subwatershed-07D CTP (Flood Control Channel in County Line Park) - Urban Drain These proposed land use sites are currently monitored with the existing CCWTMP effort and are located in accessible areas at or near the proposed Salts TMDL compliance monitoring sites. Due to lack of an existing Agricultural Land Use site in the Conejo subwatershed,the site 9BD_GERRY will be used as a representative agricultural site for both the Conejo and Camarillo subwatersheds. These land use sites may include the use of the continuous monitoring devices and will be explored in the I" Year Feasibility Study. Land use samples will be analyzed for the required constituents similar to the compliance monitoring sites. Specific details for the above land use monitoring sites are listed in Table 8 of the QAPP. All efforts will be made to include at least two wet weather sampling events during the wet season(October through April)during a targeted storm event. POTW sampling is required and will be conducted at the following locations: • 9AD CAMA(Camarillo Water Reclamation Plant) • 10D HILL(Hill Canyon Wastewater Treatment Plant) • 07D SEMI(Simi Valley Water Quality Control Plant) • 03D CAMR(Camarosa Water Reclamation Plant) • 06D MOOR(Ventura County Wastewater Treatment Plant) Even if discharge to surface waters does not occur for the POTWs listed above, representative effluent samples for boron, sulfate, TDS,and chloride will be needed for tracking the watershed salt balance. Information including specific location details is located in Table 6 of the QAPP. 6.4 SAMPLING SCHEDULE Table 5 presents the sampling schedule. Dates will be finalized during coordination with other monitoring efforts (NPDES POTW and Stormwater monitoring and the Conditional Waiver Program) in order to minimize duplication of effort and to develop a representative data set. All efforts will be made to include two additional wet weather water sampling events between October and April during targeted storm events, as described in the CCWTMP QAPP. Collection of land use samples will make all efforts to coincide with compliance monitoring and wet weather sampling events as outlined in Table 5. The monitoring schedule will be revised if it does not appropriately characterize conditions in the watershed. Any changes with regard to the sample schedule will be determined through discussions between the CCWTMP QAPP Project Manager, Project QA Manager, field staff, and the Regional Board Project Manager and will be documented in the Annual Report. DRAFT CCW Salts TMDL 12 June 2,2009 Monitoring Approach Table 5.Compliance Monitoring Sites and Schedules' Month Subwatershed Station ID Reach Le i Tie Q Q to O Z G Revolon 04 WOOD 4 X X X X I X X X I X I X X X X Calleguas 03_UNIV 3 X X X X X X X X X X X X Simi 07 HITCH 7 X X X X X X X X X X X X Camarillo 9A HOWAR 9A X X X X X X X X X X X X Conejo 409B BARON 9B X X X X X X X X X X X X 1 Collection of land use samples will coincide with compliance monitoring and wet weather sampling.POTW sampling will be conducted monthly coinciding with the compliance monitoring. 7 Sampling Methods Samples will be collected in a manner appropriate for the specific analytical methods to be used. Proper sampling techniques must be used to ensure that samples are representative of environmental conditions. Field personnel will adhere to established sample collection protocols in order to ensure the collection of representative and uncontaminated (i.e., contaminants not introduced by the sample handling process itself) samples for laboratory analyses. Deviations from the standard protocols must be documented. Standard operating procedures(SOPs)for collection of samples are provided in Appendix C of the CCWTMP QAPP. The handing of the continuous monitoring devices will follow the standard operating procedures pertinent to the use, maintenance, and calibration of the device. All field measurements taken in for the calibration of the devices will be complied and summarized in the annual report along with the final data. All deviations from the standard protocols will be documented. 7.1 SAMPLE HANDLING AND CUSTODY Sampling handling and custody procedures are presented in detail in Element 12 of the CCWTMP QAPP. Sampling container, storage,preservation, and holding times for constituents specific to the Salts TMDL are presented here as they are not presented in the CCWTMP QAPP. 7.2 SAMPLE CONTAINERS, STORAGE, PRESERVATION, AND HOLDING TIMES Sample containers must be pre-cleaned and certified free of contamination according to the USEPA specification for the appropriate methods. Sample container, storage and preservation, and holding time requirements for constituents unique to Salts TMDL monitoring are presented in Table 6 as they are not presented in the CCWTMP QAPP. The remaining constituents listed in Table 1 are currently included in the CCWTMP QAPP and information on container, storage and preservation,and holding time requirements can be found in that document. After collection, samples will be stored at 4°C until arrival at the contract laboratory. DRAFT CC Salts TMDL 13 June Z 2009 Monitoring Approach Table 6.Sample Container,Volume,Initial Preservation,and Holding Time Requirements Constituent Sample Sample Immediate Processing And Holding Container Volume Storage Time Total Dissolved Solids polyethylene 500 7 days (TDS) Boron polyethylene 250 4°C 6 months Sulfate polyethylene 500 28 days Chloride polyethylene 500 28 days 1 Additional volume may be required for QC analyses. 8 Analytical Methods Aspects of analytical methods not specific to Salts TMDL monitoring are presented in detail in the CCWTMP QAPP. Analytical methods, method detection limits(MDLs), and reporting limits (RLs)required for samples analyzed for constituents unique to Salts TMDL monitoring are summarized in Table 7. The remaining constituents listed in Table 1 are currently included in the CCWTMP QAPP and information on data quality objectives and criteria for measurement data can be found in that document. MDLs and RLs are discussed in more detail in the CCWTMP QAPP. Environmentally relevant detection limits will be used to the extent practicable. Table 7.Analytical Methods and Project Method Detection and Reporting Limits for Laboratory Analysis Constituent Method' Units Project MDL Project RL �LL Total Dissolved Solids(TDS) 2540c mg/L 0.1 5.0 Boron 200.8 pg/L 1.0 5.0 Sulfate 300.0 mg/L 0.01 0.05 Chloride 300.0 mg/L 0.01 0.05 MDL—Method Detection Limit RL—Reporting Limit Standard Methods(SM)or EPA Method number. 9 Reporting An adaptive management approach to the CCWTMP has been adopted as it may be necessary to modify aspects of the CCWTMP. Results of sampling carried out through the CCWTMP and more specifically the Salts TMDL may be used to modify this plan, as appropriate. These modifications, if identified and deemed necessary,will be summarized in the annual report. 10 Additional Information Additional information regarding various aspects of monitoring not covered in the Salts TMDL Monitoring Approach are contained in the CCWTMP QAPP. The information provided in the Salts TMDL Monitoring Approach is intended to compliment the CCWTMP QAPP. The CCWTMP QAPP was designed to allow for the inclusion of additional monitoring requirements identified in TMDL. The approach outlined above will be incorporated into EO approved CCWTMP version of the QAPP addressing the Nitrogen, OCs, Metals and Toxicity TMDLs. DRAFT CCW Salts TMDL 14 June 2, 2009 Monitoring Approach June 2, 2009 DRAFT ATTACHMENT A Calleguas Creek Watershed Management Plan Feasibility Study for Continuous Monitoring Devices - (Salts) Total Maximum Daily Loads submitted to Los Angeles Regional Water Quality Control Board prepared by LARRY WALKER ASSOCIATES on behalf of the CALLEGUAS CREEK WATERSHED MANAGEMENT PLAN WATER QUALITY/WATER RESOURCES SUBCOMMITTEE t I Introduction The following is intended to outline the Feasibility Study associated with the proposed approach to meeting the monitoring requirements presented in the Total Maximum Daily Load for Boron, Chloride, Sulfate,and TDS (herein referred to as the Salts TMDL) in the Calleguas Creek Watershed Basin Plan Amendment(BPA). The Salts TMDL Monitoring Approach will be incorporated into the Calleguas Creek Watershed TMDL Monitoring Program(CCWTMP) Quality Assurance Project Plan(QAPP)during future revisions of that document and upon approval of approach by Regional Board Executive Officer(EO). 2 Monitoring Questions As stated in the Salts TMDL Monitoring Approach document,the Salts TMDL portion of the CCWTMP is designed to monitor and evaluate the implementation of the TMDL. The goals of the Salts TMDL portion of the CCWTMP include: • To determine compliance with numeric targets,waste load and load allocations. • To track and determine compliance with a salt balance in the watershed. • To generate additional land use runoff data to better understand pollutant sources and proportional contributions from various land use types. • To monitor the effect of implementation actions by urban, POTW, and agricultural dischargers on water quality. • To implement the program consistent with other regulatory actions within the CCW. The CCWTMP is intended to answer the following monitoring questions to meet the goals of the program: • Are numeric targets and allocations met at the locations indicated in the TMDLs? • Are conditions improving? • What is the contribution of constituents of concern from various land use types? The approach to evaluating the implementation of the Salts TMDL is slightly different than the previous TMDLs in that to ensure a salts balance in the watershed is being achieved and water quality objectives are being met, a comprehensive method of evaluating compliance with objectives and tracking inputs and outputs to the watershed must be utilized. This feasibility study has been developed to determine the final monitoring approach for evaluating loads and exports of salts from the watershed for determining compliance with the salt balance. The first year feasibility study is designed to evaluate the technologies that are currently available to meet these monitoring goals. 3 Technology Options When the TMDL was developed,the use of automated composite sampling equipment was envisioned as the technology that would be utilized for load assessment and salt balance output tracking. Typical automated samplers collect aliquots of stream water based on set intervals such as time or flow. The equipment allows for gathering concentration and flow information DRAFT CCW Salts TMDL 2 June Z 2009 Feasibility Study over a longer period of time (typically one to two days)to allow for better loading estimates as compared to grab samples. As an alternative to automated composite sampling equipment,technologies are now available that allow for continuous, in-situ monitoring rather than field sample collection and laboratory analysis. These continuous monitoring devices analyze in the field,and negate the need for sample delivery off site. An instantaneous data point is generated and either stored on site or transmitted to an offsite data storage location. These continuous monitoring devices allow for an increased amount of data generation that is not available via typical grab or automated sampling methods. The use of the continuous monitors will: 1. Accurately measure small changes in loadings on a much smaller time scale than traditional methods. This includes daily,diurnal, or smaller time intervals that can be measured and/or analyzed if warranted. 2. Accurately measure seasonal changes with much higher confidence than traditional sampling methods. 3. Implement vigorous monitoring in a short time frame when or if necessary. Although the existing continuous monitoring technology provides significant benefits over the traditional sampling approach for the goals of the Salts TMDL,the sensors currently only monitoring electrical conductivity and chloride. To fully utilize the sensors for the TMDL modeling,the acceptability of these two measurements as surrogates for all of the salts constituents covered by the TMDL for compliance determination needs to be evaluated. Additionally,the chloride sensors are known to require more maintenance than the electrical conductivity sensors. As a result, the feasibility study will evaluate whether conductivity alone can be utilized as a surrogate for chloride,TDS, boron and sulfate for salt balance and load �. compliance monitoring. 4 Feasiblity Study The proposed use of this new technology warrants this initial study prior to implementing the full-scale continuous monitoring approach for the required TMDL monitoring effort. The Calleguas Creek watershed is a dynamic environment with physical,hydrological, and environmental variables that can inhibit the efficient use of any type of permanent sampling equipment. This first year study is being implemented to address these concerns and to address certain questions that must be answered prior to the required monitoring, specifically targeting and addressing the overall question of"Are the continuous monitoring devices a feasible option for this monitoring requirement through out the Calleguas Creek Watershed?" Specific questions include: • What environmental conditions may inhibit installation at various locations in the CCW? • What site characteristics are best suited for this effort and/or least favorable? • What level of effort will be required to deploy, maintain,and continually operate the continuous monitoring devices in the CCW? • What is the accuracy of the chloride sensors in the CCW? • Can relationships between boron, sulfate, TDS,and chloride be developed with electrical conductivity to allow for the use of conductivity sensors as a surrogate for the other constituents? DRAFT CCW Salts TMDL 3 June 2,2009 Feasibility Study As this feasibility study progresses, it is assumed new questions,hurdles,and/or concerns may arise that will also be addressed and reported on the completion of this effort. By addressing these and other questions during this study,a final recommendation on this proposed continuous monitoring approach will be made. If this effort is not deemed feasible for this effort, it is assumed that the traditional method of using monthly grabs at each of the proposed monitoring sites will be utilized until such a time as automated sampling equipment or other technologies are available for monitoring. The feasibility study will be completed in two phases, starting with a small-scale study followed by full installation at all compliance monitoring sites. 4.1 FEASIBILITY STUDY - PHASE I The first phase of this monitoring approach will involve installation of continuous devices at three of the proposed compliance monitoring sites: • 04 WOOD - Pleasant Valley/Revolon subwatershed(Revolon Slough at Wood Rd.) • 03 UNIV-Calleguas Creek subwatershed(Calleguas Creek at University Dr.) • 07 HITCH -Arroyo Simi subwatershed(Arroyo Simi at Hitch Boulevard.) The current proposed monitoring sites for this initial phase include the following site characteristics: • Existing physical structures that will be utilized for mounting monitoring units • Adequate accessibility for sampling personnel . . • Sites are part of the current CCWTMP monitoring effort which affords the inclusion of existing institutional knowledge to better deal with the previously discussed environmental variables. Each of the proposed sites includes certain environmental challenges not only unique to the site but also watershed wide. The 03_UNIV site(on the mainstem Calleguas Creek) exhibits many of the characteristics(and challenges)of the lower watershed, including moving and shifting sand and variable flow fluctuations due to various uses upstream. This site also poses challenges facing any continuous monitoring effort in this watershed, flow. This site is situated in the same location as the United State Geological Survey(USGS)continuous stream monitoring gauge(USGS gauge# 11106550). This site also includes the Ventura Countywide Stormwater Quality Management Program mass emission site(ME-CC). Utilizing both previous and existing data and knowledge gathered from these two efforts will better assist in the calibration effort that will be required for flow monitoring at this site. The 04_Wood site (on the Revolon Slough)will pose many of the same challenges but will include the challenges facing the installation of the devices in hard lined flood control channels. This channel again has existing data that will assist in the flow calibration effort. DRAFT CCW Salts TMDL 4 June 2,2009 Feasibility Study The upper watershed site, 07_HITCH(on the Arroyo Simi), includes many similar challenges facing the other sites, including shifting bottom sediments(mainly sand)and challenges facing adequate flow measures. This site has numerous locations for device mounting yet for this first phase effort the mounting of the device will not be on any existing physical structure. This site will utilize the method of installing a secondary structure to house the monitoring device. This first phase will need to explore the secondary structure mounting strategy, for this type of mounting may be necessary at other sites and/or in future efforts associated with this monitoring or with the optional special studies monitoring that may be required in the future. Numerous structures are available and will be utilized if it is deemed unfeasible to construct a secondary structure at this site. Future efforts may be initiated to explore the use of secondary structures but will not be proposed with this feasibility effort. Upon installation of the devices at these locations, field staff will be conducting frequent (weekly) site visits to accomplish numerous tasks including: • Flow measurements • Calibration Checks • Device maintenance/up-keep • Grab sample collection At each site,cross sectional flow measurements will be taken at or near the monitoring device probes. Discharge information will be calculated and used to calibrate the depth gauge on the monitoring device and/or check the accuracy of the device readings. In stream measures and discharge calculations will follow standard procedures outlined in the QAPP. Flow measures will also be compared to available stream gauge data. The results of this effort will be presented in the final report. If this approach is deemed feasible, this effort will also act as a gauge to . . identify the adequate frequency of site visits that will be necessary when the required monitoring is initiated and will be included in the QAPP revisions. For the calibration of the monitoring sensors and to define relationships between salt constituents not monitored by the sensors, field staff will collect grab samples adjacent to the monitoring device probes. These will be collected at the same frequency of the flow measures (weekly) for this first phase effort. Samples will be collected and handled following the standard procedures outlined in the QAPP and will be analyzed for the constituents described in the Salts Monitoring Approach document. Laboratory results will be compared to corresponding device readings and the accuracy of the device will be analyzed and calibrated as necessary. For constituents monitored in the field (pH,temperature,conductance), field staff will follow standard procedures outlined in the QAPP and take in stream readings at or near the monitoring device probes,and similar procedures(to what is being proposed for the laboratory calibration)will be followed for calibration of the unit probes. The calibration of the units may also utilize a 24-hour grab sampling approach,creating a polluto-graph that will be utilized to further calibrate, and ensure the monitoring units are accurately measuring environmental conditions over a 24-hour period. This option will be available but may be initiated in the second phase of this feasibility study to better utilize resources for this effort is extremely time intensive. II% r DRAFT CCW Salts TMDL 5 June 2, 2009 Feasibility Study Field staff will evaluate the necessary visits required to properly maintain these devices. The environmental conditions in the CCW change rapidly and the possibility of probes getting fouled or damaged by in-stream debris is inevitable. For this first phase, staff will conduct weekly site visits for the duration of the study. Staff will evaluate, if a weekly site visit is adequate or too frequent upon the completion of this first phase of the study, and a recommendation will be made for the second phase of this study and will be included in the final report. The time-frame for this first phase will be two months. Upon completion of this first phase,an analysis of the collected data and the field experiences will be revisited, and modifications to the approach may be necessary. If the analysis of the data is favorable and the experiences identify this as a feasible approach,the second phase of the feasibility study may take place. 4.2 FEASIBILITY STUDY - PHASE II The purpose of the second phase of the feasibility study, if determined to be useful or necessary, will be to ensure the feasibility of using the continuous monitoring equipment at all required monitoring locations. Additionally, land use sites and other types of applications for the sensors may be considered. Finally,the additional data collection and calibration may be required to fully assess relationships between salt constituents at all compliance points in the watershed. The second phase of this feasibility study will involve the installation of continuous monitoring devices the remaining compliance monitoring sites, which are as follows: • 9A HOWAR Camarillo subwatershed- -(Conejo Creek at Howard Rd) • 9B BARON Conejo subwatershed-(Behind facility @ the Ventura County Watershed Protection District[VCWPD] stream gauge). �- Similar to the first phase,this second phase will include weekly monitoring to ensure the newly installed units are accurately measuring environmental conditions,yet duration of this weekly sampling may be reduced based upon the previous feasibility study outcomes. Similar efforts to identify environmental challenges will be conducted and addressed in the final report and included in the monitoring approach recommendation. As previously mentioned the necessity for an intensive calibration effort may be deemed necessary or requested by the stakeholders. This effort will most likely utilize a 24 hour grab sampling approach,creating a polluto-graph that will be utilized to further calibrate and ensure the monitoring units are accurately measuring environmental conditions over a 24 hour period. This option may be more appropriate for the second phase of this study,for all of the compliance monitoring locations will be installed. If conducted, samples(flow and all sampling constituents)will be collected adjacent to the monitoring device probes once an hour for a 24 hour period. Similar to the other calibration efforts, laboratory and field data will be compared to corresponding measure taken by the monitoring device. The outcome of this study, if completed,will be included in the final report. Dependant upon resources, stakeholders may want to identify potential land use sites where this continuous monitoring approach may be applicable. Due to the constraints of the device, adequate depth and flow is necessary to accurately measure all constituents, and numerous CCWTMP land use sites (both urban and agriculture)do not meet the minimum requirements of these continuous monitoring devices. Further field investigations may need to be conducted to DRAFT CCW Salts TMDL 6 June Z 2009 Feasibility Study identify sites where minimum field requirements are met but that will be at the discretion of the _ stakeholders. This identification of other potential sites is not limited to only land use sites, but may include areas of special interest or well sites. Again,field investigations will need to be conducted prior to the installation of more devices related to this effort. Stakeholders may also request or investigate the inclusion of an upstream/downstream monitoring device installation set-up to better identify reach specific salt variations. This upstream/downstream study may also assist in the identification of potential monitoring device error calculations. Again,this will be at the discretion of the stakeholders group and not a requirement of this effort. The time frame for this second phase will be 3 to 6 months dependant upon what activities are deemed necessary and/or other challenges are identified and necessary to address. It should be noted that this second phase may not truly end if this approach is deemed feasible, and will in truth just be maintained and develop into the Salts TMDL required monitoring program. 5 Data Analysis Upon completion of Phase 1 of the Feasibility Study, a through analysis of all the data obtained via this effort will be compiled. The goal of the data compilation and analysis will be three fold: 1. Review and assess the data collected via the monitoring devices and create a preliminary data report for review by the stakeholders and the Regional Board 2. Compile and assess the accuracy of the monitoring devices overall when compared to field and laboratory results 3. Create a database to store the data and build a baseline dataset that can be utilized when the required monitoring is initiated. 4. Identify relationships between conductivity and chloride data gathered by the sensors to boron, TDS, and sulfate grab samples. The data analyses and other not previously mentioned analyses identified as necessary will be included in the final report upon completion of the Phase 1 feasibility study. The report will identify whether or not Phase 2 of the study should be pursued to answer any remaining questions about the feasibility of the sensors. 6 Reporting Upon completion of both phases of the Feasibility Study,a through analysis will be completed for all of the data collected in both the first and second phase of this effort, including field notes and qualitative data on environmental conditions that may not be contained in the database. The analysis will include but is not limited to: • Feasibility of each compliance monitoring site (based upon field experiences, site challenges,etc) • Flow calibration results • Monitoring device calibration results • Preliminary trend analyses and/or load calculations The final report will include the recommendation to move forward with this continuous monitoring approach if deemed feasible based on both the efforts of the first and second phases. The report may include recommendations to the monitoring approach not previously addressed �r DRAFT CCW Salts TMDL 7 June 2,2009 Feasibility Study that are an outcome of this feasibility effort, and may warrant a modification to the existing Salts TMDL monitoring approach. If this continuous monitoring effort is deemed unfeasible, the report will most likely recommend an alternative sampling approach, including recommendations to increase or decrease the frequency of grab sampling, site relocations, composite sampling equipment installation, or other recommendations that may warrant a modification of the monitoring approach. Upon completion of this study,the results will be presented to the stakeholders and regional board for review. DRAFT CCW Salts TMDL 8 June 2,2009 Feasibility Study Exhibit F - Voting Power Calleguas Creek TMDL Program Implementation Formula — Voting Power Exhibit F EXHIBIT F version CALLEGUAS CREEK TMDL PROGRAM IMPLEMENTATION FORMULA-VOTING POWER TABLE 1 %of Cost Allocations for each TMDL by Discharger Group (Overall) Field Work Fiscal Agent and ischar er Grou Nutrients OC/PCBs Toxicity Metals Salts Svc GWQC Management POTW 67.60% 0.90% 29.40% 14.70% 54.80% 33.48% 33.48% 33.48% Urban 0.00% 26.70% 36.90% 33.40% 11.40% 21.68% 21.68% 21.68% A nculture 32.40% 72.40% 33.70% 51.90% 33.80% 44.84% 44.84% 44.84% Total Budget Annual Monitoring Budget $ 1,095,095 $ 36,500 $204,100 $ 262,500 $ 96,500 $ 25,000 $ 42.500 $ 8,900 $ 419,095 %Overall Annual Budget 3% 19% 24% 9% 2% 4% 0.8% 38% TABLE 2 %of Allocation i Discharger within Grou Group: POTWS2 City of Simi Valley 36% City of Thousand Oaks 34% Camarillo Sanitary District 20% Camrosa 5% County Waterworks 5% Group: URBAN DISCHARGE City of Simi Valley 21.3% City of Thousand Oaks 26.2% City of Camarillo 18.7% City of Moorpark 6.3% City of Oxnard 0.7% County of Ventura 17.0% Navy 3.9% Caltrans 5.8% Group: Agriculture Irrigated&Non Irrigated 100% Footnotes: WQC=General Water Quality Constituents 2 POTW cost distribution formula is based on wastewater plant design capacities per the POTWS'request. °Costs were not split between irrigated an non-irrigated land as non-irrigated land only accounts for approximately 1%of agricultural acreage. 'OVERALL VOTING POWER Overall Voting Discharger Power City of Simi Valley 15.3% City of Thousand Oaks 16.1% Camarillo Sanitary District 5.3% Camrosa 1.3% County Waterworks 1.3% City of Camarillo 4.9% City of Moorpark 1.7% City of Oxnard 0.2% County of Ventura 4.5% Navy 1.0% Caltrans 1.5% Agriculture/Farm Bureau 47.3 100.5% e Voting Power based on Annual Monitoring Costs Exhibit G - Voting Power Calleguas Creek TMDL Monitoring Program Cost Allocation — Estimate Fiscal Year 2009/10 Exhibit G 7/zo/zoos CALLEGUAS CREEK TMDL MONITORING PROGRAM COST ALLOCATION- ESTIMATE FY 2009-2010 TABLE 1 %of Cost Allocations for each TMDL by Discharger Group KLI(Field LWA Fiscal Agent Work and Management Discharger Group Nutrients OC/PCBs Toxicity Metals Salts2 Svcs. GWQC Data) and Reporting POTW 67.60% 0.90% 29.40% 14.70% 54.80% 33.48% 33.48% 33.48% 33.48% Urban 0.00% 26.70% 36.90% 33.40% 11.40% 21,68% 21.68% 21.68% 21.68 Agriculture 32.40% 72,40% 33.70% 51.90% 33.80% 44.84% 44.84% 44.84% 44.84% Estimated Annual Cost $ 36,500 $ 204,100 $ 262,500 $ 96,500 $ 25,000 $ 42,500 $ 8,900 $ 288,615 $ 130,480 TABLE 2 Monitoring Cost Per TMDL Per Discharger Group Subtotal %of cost KLI(Field LWA 2009-10 Total 2009-10 within ea. Fiscal Agent Work and Management Monitoring 10%Cash Flow Monitoring Discharger Group Group Nutrients OC/PCBs Toxicity Metals Salts Svcs. GWQC Data) and Reporting Cost Reserve Cost POTWSI City of Simi Valley 36% $8,883 $661 $27,783 $5,107 $4,932 $5,122 $1,073 $34,786 $15,726 $ 104,074 $10,407 $114,481 City of Thousand Oaks 34% $8,389 $625 $26,240 $4,823 $4,658 $4,838 $1,013 $32,854 $14,853 $ 98,292 $9,829 $108,121 Camarillo Sanitary District 20% $4,935 $367 $15,435 $2,837 $2,740 $2,846 $596 $19,326 $8,737 $ 57,819 $5,782 $63,600 Camrosa 5% $1,234 $92 $3,859 $709 $685 $711 $149 $4,831 $2,184 $ 14,455 $1,445 $15,900 County Waterworks 5% $1,234 $92 $3,859 $709 $685 $711 $149 $4,831 $2,184 $ 14,455 $1,445 $15,900 Urban City of Simi Valley 21.3% $0 $11,598 $20,616 $6,860 $607 $1,961 $411 $13,317 $6,021 $ 61,391 $6,139 $67,530 City of Thousand Oaks 26.2% $0 $14,257 $25,341 $8,432 $746 $2,411 $505 $16,370 $7,401 $ 75,462 $7,546 $83,008 City of Camarillo 18.7% $0 $10,211 $18,150 $6,039 $534 $1,726 $362 $11,724 $5,301 $ 54,047 $5,405 $59,452 City of Moorpark 6.3% $0 $3,418 $6,075 $2,021 $179 $578 $121 $3,924 $1,774 $ 18,090 $1,809 $19,899 City of Oxnard 0.7% $0 $405 $720 $240 $21 $68 $14 $465 $210 $ 2,143 $214 $2,358 County of Ventura 17.0% $0 $9,279 $16,493 $5,488 $485 $1,569 $329 $10,654 $4,817 $ 49,114 $4,911 $54,026 Navy 3.9% $0 $2,152 $3,825 $1,273 $113 $364 $76 $2,471 $1,117 $ 11,391 $1,139 $12,530 Caltrans 5.8% $0 $3,175 $5,643 $1,878 $166 $537 $112 $3,645 $1,648 $ 16,803 $1,680 $18,484 Agriculture' Agriculture/Farm Bureau 100% $11,826 $147,768 $88,463 $50,084 $8,450 $19,057 $3,991 $129,415 $58,507 $ 517,560 $51,756 $569,316 Total Monitoring Cost per TMDL $ 36,500 $ 204,100 $ 262,500 $ 96,500 $ 25,000 $ 42,500 $ 8,900 $ 288,615 $ 130,480 $ 1,095,095 $109,510 $1,204,605 Percentages based on LWA Memo dated 4/12/2006.Allocations presented in the BPAs were multiplied by the average annual discharge volume from each responsible entity to determine an allowable load for each responsible entity for each TMDL. Total Allocation=(Ag Allocation'Ag Annual Discharge Volume)+(Urban Allocation"Urban Annual Discharge Volume)+(POTW Allocation.POTW Annual Discharge Volume) The allowable loads for each responsible entity were then added together to determine the total allowable load. Finally the allowable load for each responsible entity was divided by the total allowable load to determine the percent of the allocation each entity was res onsible for. Salts TMDL percentages calculated using the same procedures outlined in the LWA Memo dated 4/12/2006. POTW flows from the memo were used to calculated POTW loads. For urban and agriculture,the allocations in the TMDL were presented as loads. The load allocations were used directly foragriculture and urban discharges. 3 POTW cost distribution formula is based on wastewater plant design capacities per the POTWs'request. "Urban cost distribution based on allocations multiplied by average annual discharge volume from each entity. Open space portion was split proportionally since the contribution is minimal, s Costs were not split between irrigated an non-irrigated land as non-irrigated land only accounts for approximately I%of agricultural acreage. s Costs from 2009-2010 LWA Budget estimate. Costs are estimated and may increase or decrease depending on results of special studies and monitoring data. GWQC=General Water Quality Constituents • 0 • Exhibit H Calleguas Creek TMDL Monitoring Program Cost Allocation — Estimate Fiscal Year 2009/10 EXHIBIT H 7129/2009 CALLEGUAS CREEK TMDL IMPLEMENTATION COST ALLOCATION- ESTIMATE FY 2009-2010 TABLE 1 %of Cost Allocations for each TMDL by Discharger Group OC/PCBs OC/PCBs OC/PCBs CC/PCBs Metals Metals Discharger Group Nutrients All OTW and UrbiAg and Urban Ag Only Toxictity All Ag and Urban Salts' Bacteria' Trash° Management All POTW 67.60% 0.90% 3.26% 0.00% 0.00% 29.40% 14.70% 0.00% 54.80% 0.60% 17.13 Urban 0.00% 26.70% 96.74% 26.94% 0.00% 36.90% 33.40% 39.16% 11.40% 44.40% 31.56% Agriculture 32.40% 72.40% 0.00% 73.06% 100.00% 33.70% 51.90% 60.84% 33.80% 55.00% 51.31% Estimated Annual Cost $ 131,385 $ 25,990 $ 46,840 $ 24,840 $ 87,010 $ 31,505 $ 49,000 $ 54,400 $ 135,177 $ 191,244 TABLE 2 Implementation Study Per TMDL Per Discharger Group %of cost OC/PCBs within ea. POTW and OC/PCBs Ag OC/PCBs Ag Metals Ag Management Subtotal 2009- 10%Cash Flow Total 2009-2010 Discharger Group Group Nutrients OC/PCBs All Urban and Urban Only Toxicity Metals All and Urban Salts Bacteria Trash All 2010 Cost Reserve Cost POTWss City of Simi Valley 36% $0 $426 $305 $0 $0 $0 $4,605 $0 $9,667 $118 $0 $11,791 $26,911 $2,691 $29,602 City of Thousand Oaks 34% $0 $402 $288 $0 $0 $0 $4,349 $0 $9,130 $111 $0 $11,136 $25,415 $2,542 $27,957 Camarillo Sanitary District 20% $0 $236 $170 $0 $0 $0 $2,558 $0 $5,370 $65 $0 $6,551 $14,950 $1,495 $16,445 Camrosa 5% $0 $59 $42 $0 $0 $0 $640 $0 $1,343 $16 $0 $1,638 $3,738 $374 $4,111 County Waterworks 5% $0 $59 $42 $0 $0 $0 $640 $0 $1,343 $16 $0 $1,638 $3,738 $374 $4,111 Urbane City of Simi Valley 213% $0 $7,466 $5,351 $2,686 $0 $0 $6,185 $2,626 $1,189 $5,141 $0 $12,848 $43,491 $4,349 $47,841 City of Thousand Oaks 26.2% $0 $9,178 $6,578 $3,302 $0 $0 $7,603 $3,227 $1,461 $6,319 $0 $15,792 $53,460 $5,346 $58,806 City of Camarillo 18.7% $0 $6,573 $4,711 $2,365 $0 $0 $5,445 $2,311 $1,047 $4,526 $27,035 - $11,311 $65,324 $6,532 $71,857 City of Moorpark 6.3% $0 $2,200 $1,577 $791 $0 $0 $1,823 $774 $350 $1,515 $0 $3,786 $12,816 $1,282 $14,097 City of Oxnard 0.7% $0 $261 $187 $94 $0 $0 $216 $92 $42 $179 $0 $449 $1,519 $152 51,670 County of Ventura 17.0% $0 $5,973 $4,281 $2,149 $0 $0 $4,948 $2,101 $951 $4,113 $54,071 $10,278 $88,865 $8,887 $97,752 Navy 3.9% $0 $1,385 $993 $498 $0 $0 $1,148 $487 $221 $954 $0 $2,384 $8,070 $807 $8,877 Caltrans 5.8% $0 $2,044 $1,465 $735 $0 $0 $1,693 $719 $325 $1,407 $27,035 $3,517 $38,940 $3,894 $42,834 Agriculture' Agriculture/Farm Bureau 100% $0 $96,123 $0 $34,220 $24,840 $0 $45,158 $19,169 $16,562 $29,920 $27,035 $98,128 $390,155 $39,016 $429,171 Total Monitoring Cost per TMDL $ $ 131,385 $ 25,990 $ 46,840 $ 24,840 $ $ 87,010 $ 31,505 $ 49,000 $ 54,400 $ 135,177 $ 191,244 $777,391 $77,740 $855,131 'Percentages based on LWA Memo dated 4/12/2006.Allocations presented in the BPAs were multiplied by the average annual discharge volume from each responsible entity to determine an allowable load for each responsible entity for each TMDL. Total Allocation=(Ag Allocation•Ag Annual Discharge Volume(+(Urban Allocation'Urban Annual Discharge Volume)+(POTW Allocation"POTW Annual Discharge Volume) The allowable loads for each responsible entity were then added together to determine the total allowable load.Finally the allowable load for each responsible entity was divided by the total allowable load to determine the percent of the allocation each entity was responsible for. 'Salts TMDL percentages calculated using the same procedures outlined in the LWA Memo dated 4/12/2006. POTW flows from the memo were used to calculated POTW loads. For urban and agriculture,the allocations in the TMDL were presented as loads. The load allocations were used direct) fora riculture and urban dischar es. e ac era a oce Ions ave no ye een eve ope . 1 o utilize a procedure identified In the memo to calculate cost percentages,assumptions were made about e allocations or the sources. Bacteria percentages were determined by assuming the urban and agricultural allocations would be set to the geometric mean water quality objectives for fecal colifonn,e.coli,and enterrococcus. For POTWs,the allocations were assumed to be the POTW colifonn effluent limits. Loads were calculated using the flows outlined in the 4/12/2006 memo. These percentages will be adjusted when the Bacteria TMDL is adopted. 'The Trash TMDL assigns allocations of 0 trash to all sources. Since loadings cannot be calculated for trash,each responsible party in the TMDL that is participating in the proposed TMRP and MFAC is assigned an equal share of the cost. The VCWPD cost share is included in the County of Ventura cost. s POTW cost distribution formula is based on wastewater plant design capacities per the POTWs'request. Urban cost distribution based on allocations multiplied by average annual discharge volume from each entity. Open space portion was split proportionally since the contribution is minimal. Costs were not s lit between irrigated an non-irrigated land as non-irrigated land only accounts forapproximately 1%of agricultural acreage. Costs from 2009-2010 LWA Budget estimate. Costs are estimated and may increase or decrease depending on results of special studies and monitoring data. • • • Exhibit I - Party Representatives of Parties EXHIBIT I Representatives of PARTIES Camrosa Water District Frank Royer, General Manager 7385 Santa Rosa Road Camarillo, CA 93012 Phone: 805-482-4677 Fax: 805-482-5143 Email: froyer(a)-camrosa.com Camarillo Sanitary District & City of Camarillo Lucia McGovern, Deputy Public Works Director 601 Carmen Drive Camarillo, CA 93010 Phone: 805-388-5334 Fax No: 805-388-5387 Email: Imcgoverna-ci.camarillo.ca.us City of Moorpark Yugal K. Lall, P.E., City Engineer 799 Moorpark Avenue Moorpark, CA 93021 Phone: 805-517-6255 �.,. Fax: 805-532-2555 Email: ylall .ci.moorpark.ca.us City of Oxnard Mark Norris, Assistant Public Works Director 305 West Third Street Oxnard, CA 93030 Phone: 805-271-2205 Fax: 805-488-2036 Email: mark.norris @ci.oxnard.ca.us City of Simi Valley Joe Deakin, Assistant Public Works Director 2929 Tapo Canyon Road Simi Valley, CA 93063 Phone: 805-583-6786 Fax: 805-483-6300 Email: ideakin(a�simivalley.orq City of Thousand Oaks Jay Spurgin, Deputy Public Works Director 2100 Thousand Oaks Boulevard Thousand Oaks, CA 91362 Phone No. 805-449-2444 Fax No. 805-449-2475 Email: jspurgin(a)toaks.orq County of Ventura Public Works Agency Jeff Pratt, Director 800 S. Victoria Ave. Ventura, CA 93009 Phone: 805-654-2074 Fax: 805-654-3952 Email: jeff.pratt _ventura.org Ventura County Waterworks District No. 1 Reddy Pakala, Manager 7150 Walnut Canyon Road Moorpark, CA 93021 Phone: 805-584-4830 Fax: 805-529-7542 Email: reddy.pakala(@_ventura.org U.S. Department of Navy Steve Granade, Environmental Engineer Naval Base Ventura County Building 632 Laguna Road Point Mugu, CA 93042 Phone No. 805-989-3806 Fax No. 805-989-1011 E-mail: steve.granade @navy.mil California Department of Transportation (Caltrans) Bob Wu, Senior Transportation Engineer 100 South Main Street, Suite 100, MS13 Los Angeles, CA 90012 Phone No. 213-897-8636 Fax No. 213-897-0205 Email: robert—wu@dot.ca.gov Ventura County Agricultural Irrigated Lands Group A Subdivision of Farm Bureau of Ventura County John Krist, Chief Executive Officer 5156 McGrath St., Suite 102 Ventura, CA 93006 Phone: 805-289-0155 Fax: 805-658-0295 Email: john @farmbureauvc.com Exhibit J - Trash Attachment A to Resolution No. R4-2007-007 Proposed Amendments to the Water Quality Control Plan Los Angeles Region for the Revolon Slough and Beardsley Wash Trash TMDL Exhibit J Attachment A to Resolution No. R4-2007-007 Proposed Amendments to the Water Quality Control Plan - Los Angeles Region for the Revolon Slough and Beardsley Wash Trash TMDL Amendments: r Table of Contents Add: Chapter 7. Total Maximum Daily Loads (TMDLs) 7-24 Revolon Slough and Beardsley Wash Trash TMDL List of Figures, Tables and Inserts Add: Chapter 7. Total Maximum Daily Loads (TMDLs) Tables 7-24 Revolon Slough and Beardsley Wash Trash TMDL 7-24.1. Revolon Slough and Beardsley Wash Trash TMDL Elements 7-24.2a. Revolon Slough and Beardsley Wash Trash TMDL, Implementation Schedule - Point Sources 7-24.2b. Revolon Slough and Beardsley Wash Trash TMDL, Implementation Schedule - Minimum Frequency of Assessment and Collection Program Chapter 7. Total Maximum Daily Loads (TMDLs) Revolon Slough and Beardsley Wash Trash TMDL This TMDL was adopted by: The Regional Water Quality Control Board on June 7, 2007. The State Water Resources Control Board on December 4, 2007. The Office of Administrative Law on January 24, 2008. The U.S. Environmental Protection Agency on February 27, 2008. The elements of the TMDL are presented in Table 7-24.1 and the Implementation Plan in Tables 7-24.2a and 7-24.2b. Table 7-24.1 Revolon Slough and Beardsley Wash Trash TMDL: Elements Element Revolon Slough and Beardsley Wash Trash TMDL Problem Statement Current levels of trash discharges into Revolon Slough and Beardsley Wash violate water quality objectives and are impairing beneficial uses. Relevant water quality objectives include Floating Material and Solid, Suspended, or Settleable Materials. The following designated beneficial uses are impacted by trash: water contact recreation (REC 1); non-contact water recreation (REC2); warm freshwater habitat (WARM); wildlife habitat (WILD); wetland habitat (WETS. Numeric Target Zero trash in Revolon Slough and Beardsley Wash, and in (interpretation of the the channel. Zero is defined as (1) for nonpoint sources, narrative water quality no trash immediately following each assessment and objective, used to collection event consistent with an established Minimum calculate the load Frequency of Assessment and Collection Program (MFAC allocations) Program). The MFAC Program is established at an interval that prevents trash from accumulating in deleterious amounts that cause nuisance or adversely affect beneficial uses between collections, and (2) for point sources, zero trash discharged into Revolon Slough and Beardsley Wash, shoreline and channel. Source Analysis Litter from adjacent land areas, roadways and direct dumping and deposition are sources of trash to Revolon Slough and Beardsley Wash. Point sources such as storm drains are also sources of trash discharged to Revolon Slough and Beardsley Wash. Loading Capacity Zero, as defined in the Numeric Target. Waste Load Allocations Waste Load Allocations (WLAs) are assigned to the (for point sources) Department of Transportation (Caltrans) Permittees and Co-Permittees of the Ventura County Municipal Separate Storm Sewer System (MS4) Permit, including Ventura County, the Ventura County Watershed Protection District, the City of Camarillo, and the City of Oxnard, and local landowners. WLAs are zero trash. WLAs may be issued to additional responsible jurisdictions in the future under Phase 2 of the US EPA Stormwater Permitting Program, or other applicable regulatory ro rams. Load Allocations (for Load Allocations (LAs) are assigned to land owners and nonpoint sources) agencies in the vicinity of Revolon Slough and Beardsley Wash, including the County of Ventura,Ventura County Watershed Protection District, City of Camarillo, City of Oxnard, and Agricultural entities in the Revolon Slough and Beardsley Wash subwatersheds. LAs are zero trash. LAs may be issued to additional responsible jurisdictions in the future under applicable regulatory ro rams. Implementation Implementation of the trash TMDL for Revolon Slough and Beardsley Wash includes structural and non-structural best management practices (BMPs) and a program of minimum frequency of assessment and collection (MFAC) to address point and nonpoint trash sources. Point Sources WLAs shall be implemented through storm water permits and via the authority vested in the Executive Officer by section 13267 of the Porter-Cologne Water Quality Control Act (Water Code section 13000 et seq.). If point source dischargers comply with WLAs by implementing an Executive Officer certified full capture system on conveyances that discharge to Revolon Slough and Beardsley Wash through a progressive implementation schedule of full capture devices, they will be deemed in compliance with the WLA. In certain circumstances (if approved by the Executive Officer), point source dischargers may alternatively comply with WLAs by implementing a program for minimum frequency of assessment and collection in conjunction with best management practices (MFAC/BMPs). 1. Compliance with the final WLA may be achieved through an adequately sized and maintained full capture system, once the Executive Officer has certified that the system meets the following minimum criteria.A full capture system, at a minimum, consists of any device or series of devices that traps all particles retained by a 5 mm mesh screen and has a design treatment capacity of not ,. less than the peak flow rate (Q) resulting from a one-year, one-hour, storm in the sub-drainage area. The rational equation is used to compute the peak flow rate: Q = C x I x A, where Q = design flow rate (cubic feet per second, cfs); C = runoff coefficient (dimensionless); I = design rainfall intensity (inches per hour); and A= subdrainage area (acres). Point sources that choose to comply via a full capture system, must demonstrate a phased implementation of full capture devices over an 8-year period until the final WLA of zero is attained. Zero will be deemed to have been met if full capture systems have been installed on all conveyances discharging to Revolon Slough and Beardsley Wash. Irrespective of whether point sources employ a full capture system, they may comply with the WLA in any lawful manner. 2. Compliance through a MFAC program in conjunction with BMPs may be proposed to the Regional Board for incorporation into the relevant NPDES permit. The MFAC program must include requirements equivalent to those described in the Conditional Waiver set forth below. Agencies that are responsible for both point and nonpoint sources will be deemed in compliance with both the WLAs and LAs if a MFAC/BMP program, approved by the Executive Officer, is implemented. Nonpoint Sources LAs shall be implemented through either (1) a conditional waiver from waste discharge requirements, or (2) an alternative program implemented through waste discharge requirements or an individual waiver or another appropriate order of the Regional Board. Non-point source dischargers may achieve compliance with the LAs by implementing a MFAC/BMP program approved by the Executive Officer. Responsible jurisdictions that are responsible for both point and nonpoint sources will be deemed in compliance with both the WLAs and LAs if an MFAC/BMP program, approved by the Executive Officer, is implemented. 1) Conditional Waiver: Pursuant to Water Code section 13269, waste discharge requirements are waived for any responsible jurisdiction that implements a MFAC/BMP Program which, to the satisfaction of the Executive Officer, meets the following criteria: a) The MFAC/BMP Program includes an initial minimum frequency of trash assessment and collection and suite of structural and/or ,« nonstructural BMPs. The MFAC/BMP program shall include collection and disposal of all trash found in the water and on the shoreline. Responsible jurisdictions shall implement an initial suite of BMPs based on current trash management practices in land areas that are found to be sources of trash to Revolon Slough and Beardsley Wash. For Revolon Slough and Beardsley Wash, the initial minimum frequency shall be set as follows: 1. Monthly on Revolon Slough and its adjacent land areas at Wood Road (the end of the concrete-lined channel), as defined in the Executive Officer approved Trash Monitoring and Reporting Plan (TMRP). 2. Bi-monthly on the water, shoreline and channels of Beardsley Wash and Revolon Slough in areas under the jurisdiction of the County of Ventura, and agricultural lands. 3. Monthly assessment and collection at outlets on north side of Camarillo Hills Drain between Las Posas Rd. and Wood Rd. 4. Monthly on Las Posas Estate Drain between Central Ave. and the 101 Freeway. 5. Monthly at the inlet to the North Ramona Place Drain debris basin. i 6. Monthly at inlet to Beardsley Wash at Wright Road and the adjacent land areas, as defined in the Executive Officer approved TMRP. 7. Monthly on a rotating basis of the following channels from the City of Oxnard (i.e. one drain cleaned per month): a. Fifth Street Drain from Del Norte Blvd. to Revolon Slough b. Sturgis Drain from Oxnard City Limits to Revolon Slough c. Nyeland Drain from Center Drive to Friedrich Rd. d. Del Norte Drain from Del Norte Blvd. to Revolon Slough 8. All Drains listed above will also be cleaned within one week of every storm event greater than 1 inch of rain. b) The MFAC/BMP Program includes reasonable assurances that it will be implemented by the responsible jurisdiction. c) The MFAC/BMP Program includes a Trash Monitoring and Reporting Plan, as described below, and a requirement that the responsible jurisdictions will self-report any non-compliance with its provisions. The results and report of the Trash Monitoring and Reporting Plan must be submitted to Regional Board on an annual basis. d) MFAC protocols may be based on SWAMP protocols for rapid trash assessment, or alternative protocols proposed by dischargers and approved by the Executive Officer. e) Implementation of the MFAC/BMP program should include a Health and Safety Plan to protect personnel. The MFAC/BMP shall not require responsible jurisdictions to access and collect trash from areas where personnel are prohibited. Compliance for Agricultural Sources For agricultural dischargers, the Conditional Waiver for Irrigated Lands will be revised to include a MFAC/BMP program for enrollees in the Revolon Slough and Beardsley Wash subwatershed. The Executive Officer may approve or require a revised assessment and collection frequency and definition of the critical conditions under the waiver: (a) To prevent trash from accumulating in deleterious amounts that cause nuisance or adversely affect beneficial uses between collections; (b) To reflect the results of trash assessment and collection; (c) If the amount of trash collected does not show a decreasing trend, where necessary, such that a shorter interval between collections is warranted; or (d) If the amount of trash collected is decreasing such that a longer interval between collections is warranted. At the end of the implementation period, a revised MFAC/BMP program may be required if the Executive Officer determines that the amount of trash accumulating between collections is causing nuisance or otherwise adversely affecting beneficial uses. With regard to (a), (b) or (c), above, the Executive Officer is authorized to allow responsible jurisdictions to implement additional structural or non-structural BMPs in lieu of modifying the monitoring frequency. Any waivers implementing the TMDL shall expire pursuant to Water Code section 13269 five years after the effective date of this TMDL, unless reissued. The Regional Board may reissue this waiver through an order consistent herewith, instead of readopting these regulatory provisions. (2) Alternatively, responsible jurisdictions may propose, or the Regional Board may impose, an alternative program which would be implemented through waste discharge requirements, an individual waiver, a cleanup and abatement order, or any other appropriate order or orders, provided the program is consistent with the assumptions and requirements of the reductions described in Table 7- 24.2b, below. Within six months of the effective date of this TMDL, the Executive Officer shall require responsible jurisdictions to submit either a notice of intent to be regulated under the conditional waiver with their proposed MFAC/BMP Program and Trash Monitoring and Reporting Plan (TMRP), or a report of waste discharge. Monitoring and Responsible jurisdictions will develop a TMRP for Reporting Plan Executive Officer approval that describes the methodologies that will be used to assess and monitor trash in Revolon Slough and Beardsley Wash and/or within responsible jurisdiction land areas. The TMRP shall include a plan to establish the trash Baseline WLAs for non-Caltrans entities, or an alternative to the default trash baseline for Caltrans to prioritize installation of full capture devices. The default trash baseline WLA for Caltrans is 6677.4 gallons per square mile per year. Requirements for the TMRP shall include, but are not `001, limited to, assessment and quantification of trash collected I%W from the surfaces and shoreline of Revolon Slough and Beardsley Wash or from responsible jurisdiction land areas. The monitoring plan shall provide details of the frequency, location, and reporting of trash monitoring. Responsible jurisdictions shall propose a metric (e.g., weight, volume, pieces of trash) to measure the amount of trash in Revolon Slough and Beardsley Wash and on the land area surrounding Revolon Slough and Beardsley Wash, as defined in the Executive Officer approved TMRP. The TMRP shall include a prioritization of areas that have the highest trash generation rates. The TMRP shall give preference to this prioritization when scheduling the installation of full capture devices, BMPs, or trash collection programs. The TMRP shall also include an evaluation of effectiveness of the MFAC/BMP program to prevent trash from accumulating in deleterious amounts that cause nuisance or adversely affect beneficial uses between collections, proposals to enhance BMPs, and a revised MFAC for Executive Officer review. Responsible Jurisdictions may coordinate their TMRP activities for Revolon Slough and Beardsley Wash. Margin of Safety Zero is a conservative numeric target which contains an implicit margin of safety. Seasonal Variations Discharge of trash from the conveyances occurs primarily and Critical Conditions during or shortly after a major rain event. Discharge of trash from nonpoint sources occurs during all seasons, but can be increased during or shortly after high wind events, which are defined as periods of wind advisories issued by the National Weather Service. Table 7-24.2a Revolon Slough and Beardsley Wash Trash TMDL: Implementation Schedule Point Sources Task Task Responsible Jurisdiction Date No. 1 Submit Trash City of Camarillo; City of Oxnard; 6 months from Monitoring and Ventura County Watershed effective date of Reporting Plan, Protection District; Ventura TMDL. If a plan including a plan County; Caltrans; Local land is not approved for defining the owners with conveyances by the Executive trash baseline Officer within 9 WLA and a months, the proposed Executive Officer definition of will establish an "major rain event". appropriate monitoring plan. 2 Implement Trash City of Camarillo; City of Oxnard; 6 months from Monitoring and Ventura County Watershed receipt of letter of Reporting Plan. Protection District;Ventura approval from County; Caltrans; Local land Regional Board owners with conveyances Executive Officer, or the date a plan is established by the Executive Officer. 3 Submit results of City of Camarillo; City of Oxnard; 2 years from Trash Monitoring Ventura County Watershed receipt of letter of and Reporting Protection District;Ventura approval for the Plan, recommend County; Caltrans; Local land Trash Monitoring trash baseline owners with conveyances and Reporting WLA, and propose Plan from prioritization of Regional Board Full Capture Executive Officer. System installation or implementation of other measures to attain the required trash reduction. 4 Installation of Full City of Camarillo; City of Oxnard; Four years from Capture Systems Ventura County Watershed effective date of or other measures Protection District; Ventura TMDL. to achieve 20% County; Caltrans; Local land reduction of trash owners with conveyances from Baseline WLA*. 5 Installation of Full City of Camarillo; City of Oxnard; Five years from Capture Systems Ventura County Watershed effective date of or other measures Protection District; Ventura TMDL. to achieve 40% County; Caltrans; Local land reduction of trash owners with conveyances from Baseline �.. - WLA* 6 Evaluate the Regional Board. Five years from effectiveness of effective date of Full Capture TMDL. Systems or other measures, and reconsider the WI.A*. 7 Installation of Full City of Camarillo; City of Oxnard; Six years from Capture Systems Ventura County Watershed effective date of or other measures Protection District; Ventura TMDL. to achieve 60% County; Caltrans; Local land reduction of trash owners with conveyances from Basdline WLA*. 8 Installation of Full City of Camarillo; City of Oxnard; Seven years from Capture Systems Ventura County Watershed effective date of or other measures Protection District; Ventura TMDL. to achieve 80% County; Caltrans; Local land reduction of trash owners with conveyances from Baseline WLA*. 9 Installation of Full City of Camarillo; City of Oxnard; Eight years from Capture Systems Ventura County Watershed effective date of or other measures Protection District; Ventura TMDL. to achieve 100% County; Caltrans; Local land reduction of trash owners with conveyances from Baseline WLA*. Compliance with percent reductions from the Baseline WLA will be assumed wherever full capture systems are installed in corresponding percentages of the conveyance discharging to Revolon Slough and Beardsley Wash. Installation will be prioritized based on the greatest point source loadings. r Table 7-24.2b Revolon Slough and Beardsley Wash Trash TMDL: Implementation Schedule Minimum Frequency of Assessment and Collection Program Task Task Responsible Jurisdiction Date No. 1 Conditional Waiver City of Camarillo; City of Oxnard; Regional Board in effect. Ventura County;Agricultural adoption of dischargers; Ventura County TMDL. Watershed Protection District; Caltrans; Local land owners with conveyances 2 Submit Notice of City of Camarillo; City of Oxnard; Six months Intent to Comply Ventura County; Agricultural from TMDL with Conditional dischargers; Ventura County effective date. Waiver of Discharge Watershed Protection District; Requirements, Caltrans; Local land owners with including conveyances MFAC/BMP Program and Trash Monitoring and Re ortin Plan. 3 Implement City of Camarillo; City of Oxnard; Six months MFAC/BMP Ventura County; Agricultural from receipt of Program. dischargers; Ventura County Notice of Watershed Protection District; Acceptance Caltrans; Local land owners with from Regional conveyances Board `�- Executive Officer. 4 Submit annual City of Camarillo; City of Oxnard; Two years from TMRP reports Ventura County; Agricultural effective date of including proposal dischargers; Ventura County TMDL, and for revising Watershed Protection District; annually MFAC/BMP for Caltrans; Local land owners with thereafter. Executive Officer conveyances a royal. 5 Reconsideration of Regional Board. Five years from Trash TMDL based effective date of on evaluation of TMDL. effectiveness of MFAC/BMP program. * At Task 3, all Responsible Jurisdictions must be attaining the zero trash target after each required trash assessment and collection event. At Task 4, all Responsible Jurisdictions must demonstrate full compliance and attainment of the zero trash target's requirement that trash is not accumulating in deleterious amounts between the required trash assessment and collection events. Based on Responsible Jurisdiction monitoring reports, the Executive Officer may adjust the minimum frequency of assessment and collection as necessary to ensure compliance between the required trash assessment and collection events. Exhibit J - Trash TMDL - BPA State of California California Regional Water Quality Control Board Los Angeles Region Resolution No. R4-2007-007 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a TMDL for Trash in Revolon Slough and Beardsley Wash Exhibit J 3 State of California California Regional Water Quality Control Board,Los Angeles Region RESOLUTION NO.R4-2007-007 June 7,2007 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a Total Maximum Daily Load for Trash in Revolon Slough and Beardsley Wash 1 WHEREAS, the California Regional Water Quality Control Board, Los Angeles Region, finds that: • i 1. The Federal Clean Water Act (CWA) requires the California Regional Watet Quality Control Board,Los.Angles Region(Regional Board) to establish water quality standards for each water body within its region. Water quality standards include beneficial uses, water quality objectives that are established at levels sufficient to protect those beneficial uses, and an antidegradation policy to prevent degrading waters. Water bodies that do not meet water quality standards are considered impaired. • i 2. CWA section 303(d)(1) requires each state to identify the waters within its boundaries that do not meet water quality standards. Those waters are placed on the state's"303(d) List" or"Impaired Waters List". For each listed water, the state is required to establish the Total Maximum Daily Load (TMDL) of each pollutant impairing the water quality standards in that waterbody. Both the identification of impaired waters and TMDLs established for those water must be submitted to U.S.EPA for approval pursuant to CWA section 303(d)(2). For all waters that are not identified as impaired, the states are nevertheless required to create TMDLs pursuant to CWA section 303(d)(3). 3. A consent decree between the United States Environmental Protection Agency, Heal the Bay, Inc. and BayKeeper, Inc. was approved on March 22, 1999, which resolved litigation between those parties relating the the pace of TMDL development. Thecourt order directs the U.S. EPA to ensure that TMDLs for all 1998-listed impaired waters be established within 13 years of the decree. A schedule was established in the consent decree for the completion of Trash TMDLs, including completion of a TMDL to reduce trash in Revolon Slough and Beardsley Wash. 4. The elements of a TMDL are described in 40 CFR 130.2 and 130.7 and section 303(d)of the CWA, as well as in U.S. EPA guidance documents (Report No. EPA/440/4-91/001). A TMDL is defined as the sum of the individual waste load allocations for point sources, load allocations for nonpoint sources and natural background (40 CFR 130.2). TMDLs i must be set at levels necessary to attain and maintain the applicable narrative and numeric water quality standards with seasonal variations and a margin of safety that takes into account any lack of knowledge concerning the relationship between effluent limitations and water quality (40 CFR 1303(c)(1)). 40 CFR 130.7 also dictates that TMDLs shall i take into account critical conditions for stream flow, loading and water quality parameters. TMDLs typically include one or more numeric "targets", i.e., numerical Resolution No.R4-2007-007 3 Page 2 translations of the existing water quality standards, which represent attainment of those standards, contemplating the TMDL elements described above. j 5. Neither TMDLs nor their targets or other components are water quality objectives, and thus their establishment does not implicate Water Code section 13241. Rather, under 1 California Law, TMDLs are programs to implement existing standards (including objectives), and are thus established pursuant to Water Code section 13242.• Moreover, they do not create new bases for direct enforcement against dischargers apart from the existing water quality standards they translate. The targets merely establish the bases through which load allocations (LAs) and waste load allocations (WLAs) are calculated. LAs and WLAs are only enforced for a discharger's own discharges, and then only in the context of the discharger's relevant National Pollutant Discharge Elimination System (NPDES) permit (or other permit, waiver, or prohibition). NPDES permits must contain effluent limits consistent with the assumptions and requirements of the WLAs (40 C.F.R. 122.44(d)(vii)(B)). The Regional Board will develop NPDES permit requirements through subsequent permit actions that win allow all interested persons, including but not limited to Municipal Separate Stormwater Sewer System, permittees, to provide comments on how the WLAs should be translated into permit requirements. LAs will be implemented either through a conditional waiver included in the basin plan amendment or in a subsequent permitting or waiver action. 6. As envisioned by Water Code section 13242, the TMDL contains a "description of surveillance to be undertaken to determine compliance with objectives." The Monitoring elements of the TMDL recognize that monitoring will be necessary to assess the on-going condition of Revolon Slough and Beardsley Wash and to assess the on-going effectiveness of efforts by dischargers to reduce trash loading to Revolon Slough and Beardsley.Wash. 7. Upon establishment of TMDLs by the State or U.S. EPA, the State is required to incorporate the TMDLs into the State Water Quality Management Plan (40 CFR 130.6(c)(1); 130.7). The Water Quality Control Plan for the Los Angeles Region(Basin Plan) and applicable statewide plans serve as the State Water Quality Management Plans governing the watersheds under the jurisdiction of the Regional Board. Attachment A to this resolution contains the Basin Planning language for this TMDL. 8. Revolon Slough and Beardsley Wash are located in a subwatershed of the Calleguas Creek Watershed in eastern Ventura County and drain to Mugu Lagoon. Revolon Slough starts as Beardsley Wash at the Camarillo Hills and becomes Revolon Slough in the Oxnard Plain.The wash flows through residential neighborhoods and mostly agricultural i areas. Revolon Slough flows into Mugu Lagoon in a channel that runs parallel to Calleguas Creek near Pacific Coast Highway. All lands within Revolon Slough subwatershed are for agricultural use.The primary water sources for Beardsley Wash and Revolon Slough are agricultural and storm water.The 1998 Clean Water Act 303(d) list identified Revolon Slough and Beardsley Wash as impaired for trash. This listing was approved by the United States Environmental Protection Agency on May 12, 1999. The I proposed TMDL addresses impairments of water quality caused by trash in Revolon Slough and Beardsley Wash, and establishes the loading capacity of trash and requires ongoing periodic monitoring to ensure that it continues to attain standards. i { Resolution No.R4-2007-007 Page 3 1 9. The Water Quality Control Plan for the Los Angeles Region prescribes narrative water quality objectives that are applicable to trash. These water quality objectives include floating material: "Waters shall not contain floating materials, including solids, liquids,foams, and scum, in concentrations that cause nuisance or adversely affect beneficial uses." 1 i and solid, suspended,or settleable materials: I "Waters shall not contain suspended or settleable material in concentrations that 1 cause nuisance or adversely affect beneficial uses." I 10. The Regional Board's goal in establishing the TMDL for trash in Revolon Slough and t Beardsley Wash is to protect the aquatic life habitat, wildlife habitat, water contact recreation and, non-contact water recreation beneficial uses of Revolon Slough and Beardsley Wash and to achieve the narrative water quality objectives set to protect those j uses. 11. Information regarding the technical document that was generated by Regional Board staff in meetings with stakeholders is contained in a staff report. The staff report,"Trash Total Maximum.Daily Load for Revolon Slough and Beardsley Wash,"dated March 20;2007; < includes information regarding the environmental setting of Revolon Slough and Beardsley Wash, description of the trash impairments and/or current attainment status as appropriate, and descriptions of.best management practices to comply with the trash TMDL. 12. The public has had a reasonable opportunity to participate in the review of the amendment to the Basin Plan. A draft of the TMDL was released for public comment on March 20, 2007; a Notice of Hearing and Notice of Filing were published and circulated on March 20, 2007; Regional Board staff responded to oral and written comments received from the public; and the Regional Board held a public hearing on June 7, 2007 to consider adoption of the TMDL. 13. In amending the Basin Plan to establish this TMDL, the Regional Board considered the requirements set forth in Sections 13240 and 13242, and section 13269 of the California Water Code. 14. Because the TMDL implements existing narrative water quality objectives (i.e.,narrative objectives for floating materials and solid, suspended or settleable materials), the Regional Board (along with the State.Water Resources Control Board) have determined that adopting a TMDL does not require the water boards to consider the factors of Water . Code section 13241. The consideration of the Water Code section 13241 factors, by section 13241's express terms, only applies "in establishing water quality objectives." Here the Regional Board is not establishing water quality objectives, but as required by section 303(d)(1)(C) of the Clean Water Act is adopting a TMDL that will implement the previously established objectives that have not been achieved. In making this determination, the Regional Board has considered and relied upon a legal memorandum from the Office of Chief Counsel to the State Water Board's basin planning staff detailing why TMDLs cannot be considered water quality objectives. (See Memorandum from the Staff Counsel Michael J. Levy, Office of Chief Counsel,to Ken Harris and Paul s Resolution No.R4-2007-007 Page 4 Lillebo,Division of Water Quality: The Distinction Between A TIML's Numeric Targets �.►' and Water Quality Standards,dated June 12,2002.) 15. While the Regional Board is not required to consider the factors of Water Code section 13241, it, nonetheless, has developed and received significant information pertaining to the Water Code section 13241 factors and has considered that information in developing and adopting this TMDL. The past,present,and probable future beneficial uses of water have been considered in that Revolon Slough and Beardsley Wash are designated for a multitude of beneficial uses in the Basin Plan. The key beneficial .uses for Revolon j Slough and Beardsley Wash include aquatic life habitat uses and water contact and non- contact water recreation. Nonpoint source discharges.of trash improperly deposited in I the vicinity of Revolon Slough and Beardsley Wash are the predominant sources of trash loading to Revolon Slough and Beardsley Wash. The environmental characteristics of Revolon Slough and Beardsley Wash are spelled out at length in the Basin Plan and in the { technical documents supporting this Basin Plan amendment, and have been considered in developing this TMDL. Water quality conditions that reasonably could be achieved through the coordinated control of all factors which affect water quality in the area have been considered. This TMDL provides several compliance options, including implementation.of full capture devices for stormdrain conveyances and a minimum frequency of trash assessment and collection. These' options provide flexibility for responsible jurisdictions to select the most effective BMPs that reduce trash loading to Revolon Slough and Beardsley Wash. Establishing a plan that will ensure Revolon Slough and Beardsley Wash attain and continue to attain water quality standards is a reasonable water quality condition. However, to the extent that there would be any conflict between the consideration of the factor in Water Code section 13241 subdivision (c), if the consideration were required, and the Clean Water Act, the Clean Water'Act would prevail. Economic considerations were considered throughout the development of the TMDL. Some of these economic considerations arise in the context of Public Resources Code section 21159 and are equally applicable here. The implementation program for this TMDL recognizes the economic limitations on achieving immediate compliance if structural BMPs are selected to abate point source discharges and allows a flexible implementation schedule of 8 years in that event. A program requiring a minimum frequency of trash assessment and collection is not forseeably a cost- prohibitive BUT. The need for housing within the region has been considered, but this TMDL is unlikely to affect housing needs because new housing will need to comply with existing county ordinances regarding proper disposal of trash. Whatever housing impacts could materialize are ameliorated by the flexible nature of this TMDL and the implementation schedule. 16. The amendment is consistent with the State Antidegradation Policy (State Board Resolution No: 68-16), in that the changes to water quality objectives (i) consider maximum benefits to the people of the state, (ii)will not unreasonably affect-present and anticipated beneficial use of waters,and(iii)will not result in water quality less than that i prescribed in policies. Likewise, the amendment is consistent with the federal Antidegradation Policy (40 CFR 131.12). This policy is further promoted by requiring that the amount of trash collected in between collection events cannot increase and is required to decrease by 50%over eight years. 17. Pursuant to Public Resources Code section 21080.5,the Resources Agency has approved the Regional Water Boards' basin planning process as a "certified regulatory program" that adequately satisfies the California Environmental Quality Act (CEQA) (Public i Resolution No.R4-2007-007 Page 5 Resources .Code, Section 21000 et seq.) requirements for preparing environmental documents. (14 Cal. Code Regs. § 15251(g); 23 Cal. Code Regs. § 3782.)The Regional Water Board staff has prepared"substitute environmental documents"for this project that contains the required environmental documentation under the State Water Board's CEQA regulations. (23 Cal. Code Regs. § 3777.) The substitute environmental documents include the TMDL staff report entitled "Trash Total Maximum Daily Load for Revolon Slough and Beardsley Wash", the environmental checklist, the comments and responses to comments,the basin plan amendment language, and this resolution. The project itself is the establishment of a TMDL for trash in Revolon Slough and Beardsley Wash, While the Regional Board has no discretion to not establish a TMDL (the TMDL is required by federal law), the Board does exercise discretion in assigning waste load allocations and load allocations, determ;mng the program of implementation, and setting various milestones in achieving the water quality standards. The CEQA checklist and other portions of the substitute environmental documents contain significant analysis and numerous findings related to impacts and mitigation measures. 18. A CEQA Scoping hearing was conducted on December 5, 2006 in the City of Camarillo. A notice of the CEQA Scoping hearing was sent to interested parties including cities and/or counties with jurisdiction in or near Revolon.Slough and Beardsley Wash on November 7, 2006. This notice was also published in the Ventura County Star on November 9,2006. 19. In preparing the substitute environmental documents, the Regional Board has considered the requirements of Public Resources Code section 21159 and California Code of Regulations, title 14, section 15187, and intends those documents to serve as a tier 1 environmental review.This analysis is not intended to be an exhaustive analysis of every conceivable impact, but an analysis of the reasonably foreseeable consequences of the adoption of this regulation, from a programmatic perspective. Compliance obligations will be undertaken directly by public agencies that may have their own obligations under CEQA. Project level impacts may need to be considered in any subsequent . environmental analysis performed by other public agencies,pursuant to Public Resources Code section 21159.2. To the extent applicable, this Tier 1 substitute environmental document may be used to'satisfy subsequent CEQA obligations of those agencies. 20. Consistent with the Regional Board's substantive obligations under CEQA,the substitute environmental documents do not engage in speculation or conjecture, and only consider the reasonably foreseeable environmental impacts, including those relating to the methods of compliance, reasonably foreseeable feasible mitigation.measures to reduce those impacts, and the reasonably foreseeable alternative means of compliance, which would avoid or reduce the identified impacts. 21. The proposed amendment could have a potentially significant adverse effect on the environment. However, there are feasible alternatives, feasible mitigation measures, or both, that if employed, would substantially lessen the potentially significant adverse impacts identified in the substitute environmental documents, however such alternatives or mitigation measures are within the responsibility and jurisdiction of other public agencies, and not the Regional Board. Water Code section 13360 precludes the Regional Board from dictating the manner in which responsible agencies comply with any of the Regional Board's regulations or orders. When the agencies responsible.for implementing this TMDL determine how they will proceed, the agencies responsible for those parts of y.�-- the project can and should incorporate such alternatives and mitigation into any Resolution No.R4-2007-007 Page 6 j subsequent projects or project approvals. These feasible alternatives and mitigation �r measures are described in more detail in the substitute environmental documents. (14 Cal.Code Regs. § 15091(a)(2).) i i 22. From a program-level perspective, incorporation of the alternatives and mitigation measures outlined in the substitute environmental documents will forseeably reduce impacts to less than significant levels. 23. The substitute documents for this TMDL and in particular the Environmental Checklist identify broad mitigation approaches that should be considered at the project level. 24. The regulatory action meets the "Necessity" standard of the Administrative Procedures Act, Government Code, Section 11353, Subdivision(b). As specified above,Federal law and regulations require that TMDLs be incorporated into the water quality management plan. The Regional Board's Basin Plan is the Regional Board's component of the water quality management plan, and the Basin Plan is how the Regional Board takes quasi- legislative, planning actions. Moreover, the TMDL is a program of implementation for existing water quality objectives, and is, therefore,,appropriately a component of the Basin Plan under Water Code section 13242. The necessity of developing a TMDL is established in the TMDL staff report,the section 303(d)list,and the data contained in the administrative record documenting the conditions related to trash in Revolon Slough and Beardsley Wash. 25. . The Basin Plan amendment incorporating a TMDL-for trash for Revolon Slough and Beardsley Wash must be submitted for review and approval by the State Water Resources j Control Board(State Board),the State Office of Administrative Law(OAL), and the U.S. EPA. The Basin Plan amendment will become effective upon approval by OAL and U.S. EPA. Notice of Decision will be filed with the Resources Agency. 26. If during the State Board's approval process Regional Board staff,the SWRCB or OAL determines that minor,non-substantive modifications to the language of the amendment are needed for clarity or consistency,the Executive Officer should make such changes consistent with the Regional Board's intent in adopting this TMDL, and should inform the Board of any such changes. i THEREFORE, be it resolved that pursuant to sections 13240 and 13242, and section 13269 of the Water Code,the Regional Board hereby amends the Basin Plan as follows: 1. Pursuant to Sections 13240 and 13242, and section 13269 of the California Water Code, the Regional Board,after considering the entire record, including oral testimony at the hearing, hereby adopts the amendments to Chapter 7 of the Water Quality Control Plan for the Los Angeles Region,as set forth in Attachment A hereto,to incorporate the elements of the Trash TMDL for Revolon Slough and Beardsley Wash. 2. Regional Board staff is directed to develop a monitoring plan to assess accumulation of settleable trash on the bottom of Revolon Slough and Beardsley Wash and, if necessary, make recommendations for remediation. i Resolution No.R4-2007-007 Page 7 3. The Regional Board hereby approves and adopts the CEQA substitute environmental documentation,including all findings contained therein,which was prepared in accordance with Public Resources Code section 21159 and California Code of Regulations,title 14, section 15187,and directs the Executive Officer to sign the environmental checklist. 4. The Executive Officer is directed to forward copies of the Basin Plan amendment to the State Board in accordance with the requirements of section 13245 of the California Water Code. 5. The Regional Board requests that the State Board approve the Basin Plan amendment in accordance with the requirements of sections 13245 and 13246 of the California Water Code and forward it to OAL and the U.S.EPA. 6. if during the State Board's approval process, Regional Board staff, the State Board or OAL determines that minor, non-substantive modifications to the language of the amendment are ineeded for clarity or consistency, the Executive Officer may make such changes, and shall inform the Board of any such changes. 7. The Executive Officer is authorized to sign a Certificate of Fee Exemption. I I, Deborah J. Smith,Interim Executive.Officer, do hereby certify that the foregoing is a full,true, and correct copy of a resolution adopted by the California Regional Water Quality Control Board, Los Angeles Region,on June 7,2007. —f? —0 7 Deborah J. Smi Date Interim Executiv fficer I i i i i i ter+ Exhibit K - Salts TMDL - Resolution State of California California Regional Water Quality Control Board Los Angeles Region Resolution No. R4-2007-016 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a TMDL for Boron, Chloride, Sulfate, and TDS (Salts) for Calleguas Creek Watershed Exhibit K State of California California Regional Water Quality Control Board,Los Angeles Region RESOLUTION NO.R4-2007-016 October 4,2007 Amendment to the Water Quality Control Plan for the Los Angeles Region to Incorporate a Total Maximum Daily Load for Boron,Chloride,Sulfate,and TDS (Salts)for Calleguas Creek Watershed WHEREAS, the California Regional Water Quality Control Board, Los Angeles Region; .finds that: 1. The.Federal Clean Water Act (CWA).requires the California Regional Water Quality . Control Board, Los Angles Region(Regional Board)to establish water quality standards for each water body within its region. Water quality standards include beneficial uses, water quality objectives that are established at levels sufficient to protect those beneficial uses, and an antidegradation policy to-prevent degrading waters. Water bodies that do not meet water quality standards are.considered impaired. 2. CWA section 303(d)(1) requires each state to identify the waters within $s boundaries that•do not meet water quality standards. Those waters are placed on the state's"303(d) List" or"Impaired Waters List". For each listed water, the state is required to establish the Total Maximum Daily Load (TMbL) of each pollutant impairing the water quality standards in that waterbody. Both the identification of impaired waters and TMDLs established for those water must be submitted to.U.S.EPA for approval pursuant to CWA section'303(d)(2). For all waters that are not identified as impaired, the states are ' nevertheless required to create TIv1DLs.pursuant to CWA section 303(d)(3).. 3. A consent decree-between (U.S. EPA), Heal'the Bay,.Inc. and BayKeeper, Inc. was approved on March 22, 1999,which resolved litigation between those parties relating the pace of TMDL development. The court order directs the U.S. EPA-to ensure that TMDLs for all 1998-listed impaired waters be established within 13 years of the consent decree, The consent decree combined water body pollutant combinations in the Los Angeles Region into 92 TMDL analytical units. In accordance'with the consent decree, the Callegdas Creek Salts TMDL addresses waterbodies with salts listings in analytical units 3 and 4. ,Based on the consent decree schedule, a TMDL for chloride was adopted by USEPA in March 2002 to address analytical unit 3. According to the consent decree, the remaining salts in analytical unit 4 CMS, sulfate, and boron) TMDLs must be approved or established by United States Environmental Protection Agency(USEPA)by March 2012. This TMDL will supercede the chloride TIvIDL for analytical unit 3 previously established by EPA.*. i 4. The .elements of a TMDL are described in. 40 CFR 130.2 and 130.7 -and section 303(d)(1)(C) and (D) of the CWA, as well as in U.S. EPA guidance documents (Report No. EPA/440/4-91/001). A TMDL is defined as the sum-of the individual waste load allocations for point sources, load allocations for nonpoint sources and natural background (40 CFR 130.2). TMDLs must be set at levels.necessary to attain and maintain the applicable narrative and numeric water quality standards with seasonal ' ;I Resolution No.R4-2007-016 Page 2 variations and a margin of safety that takes into account any lack of knowledge concerning the relationship between effluent limitations and water quality (40 CFR 130.7(c)(1)). 40 CFR 130.7 also dictates that TMDLs shall take into account critical conditions for stream flow, loading and water quality parameters. TMDLs typically include one or more numeric "targets', i.e., numerical translations of the existing water quality standards, which represent attainment of those'standards, contemplating the TMDL elements described above. Since a TMDL must represent the "total" load, TMDLs must account for all sources of the relevant pollutants, irrespective of whether the pollutant is discharged to impaired or unimpaired upstream reaches.- 5. Neither TMDLs nor their targets or other components are water quality objectives, and thus their establishment does not implicate Water Code section 13241. Rather, under California Law, TMDLs are programs to implement existing standards (including objectives), and are thus established pursuant to Water Code section 13242. Moreover, they do not create new bases for direct enforcement against dischargers.apart from the existing water quality standards they translate. The targets merely establish the bases . through which.load allocations (LAs) and waste load allocations(WLAs) are calculated. WLAs are only enforced for a discharger's own discharges, and then only in the context of the discharger's National Pollutant Discharge Elimination System (NPDES)permit(or other permit, waiver, or prohibition), which must contain effluent limits consistent with the assumptions and requirements of the WLAs (40 C.F.R. 122.44(d)(vii)(B)). The, Regional Board will develop permit requirements through subsequent permit actions that will allow all interested persons, including but not limited to:municipal, storm, water dischargers, to provide comments on how the WLAs should be translated into permit requirements. 6. As envisioned by Water Code section 13242, the T VML contains a "description of �✓ surveillance to be undertaken to determine compliance with objectives." The Compliance Monitoring and Special Studies. elements of the TMDL'recognize that monitoring will be necessary to assess the on-going condition of the Calleguas Creek watershed and to assess the on-going effectiveness of.efforts by dischargers to reduce salts loading to the Calleguas Creek. Special studies may also be appropriate to provide fiuther information about new data, new or alternative sources, and revised scientific assumptions. The TMDL does not. establish the requirements for these monitoring programs or reports, although it does recognize the type of information that will be necessary to secure. . The Regional Board's Executive Office; 'will issue orders to appropriate entities to develop and to submit monitoring programs and technical reports. The Executive.Officer will determine the scope of these programs and reports,taking into account any legal requirements,and issue the orders to the appropriate entities. 7. Upon establishment of TMDLs by the State or U.S. EPA, the State is,required to I incorporate the TMDLs into the State Water Quality Management Plan (40 CFR 130.6(c)(1); 130.7)..This Water Quality Control Plan for the Los Angeles Region(Basin Plan) and applicable statewide plans serve as the State Water Quality Management Plans governing the watersheds under the jurisdiction of the Regional Board. Attachment A to , this resolution contains the Basin Planning language for this TMDL.• . 8. The Calleguas Creek Watershed is located in southeast Ventura County, California, and in a small portion of western Los Angeles County,and drains an area of approximately 343 square miles from the Santa Susana Pass in the east, to Mugu Lagoon in the southwest. Current land use is approximately 26 percent agriculture, 24 percent urban, Resolution No.R4-2007-016 Page 3 and 50 percent open space. The tributaries and the streams of the Calleguas Creek Watershed are divided into fourteen segments, or reaches. Eleven out of fourteen reaches in the Calleguas Creek Watershed are identified•on the 2002 Clean Water Act Section 303(d)list of water-quality Iimited segments as impaired due to elevated levels of boron, chloride, sulfate, and TDS. The listings were approved by the State Water Resources Control Board on February 4, 2003. Additionally, USEPA added listings in Revolon Slough for TDS, sulfate and boron: The proposed TMDL addresses impairments of water quality caused by these salts, and the Implementation Plan is developed to achieve water quality objectives for salts in the Calleguas Creek Watershed. 9. Over the past forty years, large volumes of salts have been imported into the CalIeguas Creek watershed from the State Water Project, the Santa Clara River through the Freeman Diversion, and deep aquifers.which are pumped for water supply purposes. The Calleguas Creek watershed also contains naturally occurring or background concentrations of salts because soils are derived from marine sediments.. Salts become stranded on the watershed and accumulate over time. The result is a general salt imbalance on the watershed that manifests itself in higher surface water and groundwater concentrations of salts throughout the watershed. High salts concentrations have limited the beneficial uses of surface water and groundwater from unconfined aquifers of the Calleguas Creek Watershed. Therefore, salt export will be required throughout the watershed to effectively reduce the salts loads to surface and groundwater. The overall.. goal of this TMDL is to achieve a salt balance within each subwatershed,reduce salt load to.surface water, and achieve and maintain water quality objective for salts in the watershed. All stakeholders and the Regional Board agree that an approach that integrates water supply and water gaality is the preferred approach to addressing salt impairments in the Calleguas Creek Watershed. The Regional Board's.endorsement of this approach is in. Bart conditioned upon the stakeholders' agreement to ensure maintenance of•in-stream flows necessary to protect beneficial uses. 10. Boron is only listed in the Simi and Pleasant Valley (Revolon) subwatershed including Revolon Slough (reach 4), Arroyo.Simi (reach 7), and 'but es to Arroyo Simi (reach 9). Therefore, boron allocations are only included for the Simi Valley WWTP and not for the other POTWs that discharge to other subwatersheds. 11. Numeric targets for the TMDL are based on the specific numeric water quality objectives (WQOs)provided in the•Basin Plan. Surface water quality objectives for the Calleguas Creek watershed are applicable upstream of Potrero Road. Site specific objectives have not been determined for Calleguas Creek below Potrero Road. However, the Basin Plan provides beneficial use guidelines to determine criteria for selection of effluent limits to protect sensitive beneficial uses including agricultural supply. The Basin Plan also includes objectives for groundwater basins. 12.: The Regional Board's goal in establishing the TMDL for salts in Calleguas Creek, Watershed is to protect the agriculture irrigation and groundwater recharge beneficial uses of the Calleguas Creek Watershed and to achieve the numeric and narrative water j quality objectives set to protect those uses. 13. Calleguas Creek stakeholders have been actively engaged with USEPA and the Regional Board on a variety of watershed planning initiatives in the Calleguas Creek Watershed. Key stakeholders have formed the Calleguas Creek Watershed Management Plan Resolution No.R4-2007-016 Page 4 (CCWMP), an established, stakeholder-led watershed management group that has been continually operating since 1996. The CCWMP has broad participation from federal, State and county agencies, municipalities, POTWs, water purveyors, groundwater management agencies, and agricultural and environmental groups. As part of its mission to address issues of long-range comprehensive water resources, land use, economic development, open space preservation, enhancement and management, the CCWMP proposed to USEPA and Regional Board to take the lead on development of the TMDLs. 14. Regional Board staff has worked with the CCWMP and USEPA in the development of a detailed technical document that analyzes and describes the specific necessity and rationale for the development of this TMDL. The technical document entitled"Calleguas Creek Watershed Boron, Chloride, Sulfate, and TDS TMDL" (Technical Report) prepared by Larry Walker Associates is an integral part of this Regional Board action and was reviewed, and accepted by the Regional Board as a supporting technical analysis before acting. The technical document provides the detailed factual.basis and analysis supporting the problem stafement, numeric targets (interpretation of the narrative and numeric water•quality objectives, used to calculate the pollutant allocations), source analysis, linkage analysis,waste load allocations (for point sources)., load allocation (for . nonpoint sources),margin of safety, and seasonal variations and critical conditions of this TMDL. Final Technical Report was submitted to the Regional Board on May 31,2007. The Regional Board staff report for this TMDL, "Calleguas-Creek Watershed Boron, Chloride, Sulfate, and TDS (Salts) TMDL", is based on the analysis in the Technical Report prepared by Larry Walker Associates. 15. On October 4, 2007, prior to the.Board's action on this resolution, public hearings-were conducted on the TMDL for boron, chloride, sulfate, and TDS in the Calleguas Creek Watershed. Notice of the hearing for the TMDL boron, chloride, sulfate, and TDS in the w.. Calleguas Creek Watershed was published in accordance with the requirements of Water Code Section.13244. This notice was published in the Ventura County Stars on June 2, 2007. 16. The public has had a reasonable opportunity to participate in the review of the amendment to the Basin Plan. A draft of the TMDL was released for public comment on June 4, 2007; a Notice of Hearing and Notice of Filing were published and circulated 45 days preceding Board action; Regional' Board staff responded .to oral and written comments received from the public; and the Regional Board held a public hearing on October 4,2007 to consider adoption of the TMDL. 17. In amending the Basin Plan to establish this TMDL,, the Regional Board considered the requirements set forth in Sections 13240 and 13242 of the California Water Code. 18. Because the TMDL implements existing numeric water quality objectives (i.e.,numeric water quality objectives in the Basin Plan), the Regional Board (along with the State Water Resources Control Board)have determined that adopting a TMDL.does not require the water boards to consider the factors of Water Code section 13241. The consideration of the Water Code section 13241 factors, by section 13241's express terms, only applies "in establishing water quality objectives." Here the Regional Board is not establishing water.quality objectives,but as required by section 303(d)(1)(C) of the Clean Water Act is adopting a TMDL that will implement the previously established objectives that have not been achieved. In making this determination,the.Regional Board has considered and relied upon a legal.memorandum from the Office of Chief Counsel to the State Water Resolution No.R4-2007-016 Page 5 Board's basin planning staff detailing why TMDLs cannot be considered water quality objectives. (See Memorandum from the Staff Counsel Michael I Levy, Office of Chief Counsel, to Ken Farris and Paul Lillebo, Division of Water Quality: The Distinction Between A TAML's Numeric Targets and Water Quality Standards, dated June 12,2002.) 19. While the Regional Board is not required to consider the factors of Water Code section 13241,.it, nonetheless, has developed and received significant information pertaining to the Water Code section 13241 factors and has considered that information in developing and adopting this TMDL. The past,present, and probable future beneficial uses of water have been considered in that the Calleguas Creek watershed is designated for a multitude of beneficial uses in the Basin Plan. Various living organisms(including vegetation,fish, invertebrates, and wildlife) are present in, transient through, and will be present in the Calleguas. Creek.' Dry weather surface water in the Calleguas Creek watershed is primarily composed of groundwater, municipal wastewater, urban non-stormwater discharges, and agricultural runoff. In the upper reaches of the watershed, upstream of any wastewater discharges, groundwater discharge from shallow surface aquifers provide a constant base flow. .The environmental characteristics of the Calleguas Creek are spelled out at length in the Basin Plan and.in the technical documents.supporting this Basin Plan amendment; and have been considered in developing this TMDL. Water quality conditions.that reasonably could be achieved through the coordinated control of implementation actions including integrating watershed-scale infrastructure projects to desalt groundwater and wastewater, and administrative programs to reduce salt loadings. to the.Calleguas Creek watershed. TMDL implementation will be carried out by water agencies; municipalities,.*POTWs, and non-point dischargers in the Calleguas Creek Watershed to desalt groundwater and wastewater. These projects focus on desalting groundwater underlying Calleguas �, .. Creek and discharging salts to the Pacific Ocean through a brineline and ocean outfall outside of sout'hetn Ventura County. Water quality in Calleguas Creek will be attained by reducing the amount of salts imported and added to water in the watershed, reducing salts loads from groundwater exfiltration, transporting salts downgradient and exporting salts out of the watershed. Responsible agencies also have several-options for implementing structural and nonstructural . BN1T's to attain a salt balance and attain water quality objectives. AuthQnzmg certain storm water dischargers to rely on BMPs in the first instances reflects the reasonableness of the action Mi terms of the ability to implement the requirements,as well as an understanding that the water quality conditions can reasonably be attained under different hydrological conditi ons. However,to the extent that there would be any conflict between the consideration of the factor in Water Code section 13241 subdivision (c),if the consideration were required, and the Clean Water Act, the Clean Water Act would prevail. Economic considerations were considered throughout the development of the I TMDL. Some of these.economic considerations arise in the context of Public Resources Code section 21159 and are equally applicable here. The implementation program for this TMDL recognizes the economic limitations on achieving immediate compliance. The TMDL also authorizes the use of BMPs, to the extent authorized by law,for various storm water dischargers. Economic considerations were considered and are reflected in an implementation program that is flexible and allows 15 years for POTWs,permitted stormwater and non-permitted.stormwater dischargers, and agricultural dischargers to comply with the final allocations. The need for housing within the region has been . considered, but this TMDL is unlikely to affect housing needs. Whatever housing Resolution No.M-2007-016 Pzgc 6 ,"~ impacts could materialize are ameliorated by the flexible nature of this TMDL and the implementation schedule. 20. The amendment is consistent with the State Antidegradation Policy(State Board Resolution No. 68-16), in that the changes to water quality objectives (i)consider maximum benefits to the people of the state,(in)will not unreasonably affect present and anticipated beneficial use of waters,and(iii)will not result'in water quality less than that prescribed in policies. Likewise,the amendment is consistent with the federal Antidegradation Policy(40 CFR 131.12). 21. Pursuant to Public Resources Code section 21080.5, the Resources Agency has approved the Regional Water Boards' basin planning process as a"certified regulatory program" that adequately satisfies the California Environmental Quality Act(CEQA)(Public Resources Code, Section 21.000 et seq.)requirements for preparing environmental documents(14 Cal.Code Regs. § 15251(g);23 Cal. Code Regs. § 3782.) The Regional Water Board staff has prepared"substitute environmental documents"for this project that contains the required environmental documentation under the State Water Board's CEQA regulations. (23 Cal.Code Regs:'§3777.) The substitute environmental documents include the TMDL staff report entitled"Calleguas Creek Watershed Boron,Chloride, Sulfate, and TDS TMDL',the environmental checklist,the comments and responses to comments, the basin plan amendment language, and this resolution.•The*project itself is the establishment of a TMDL for boron,chloride,sulfate,and TDS in the Callegaas creek watershed. While the Regional'Bbard has no discretion to not establish'a TMDL(the TMDL is required by federal law),the Board does exercise discretion in assigning waste load allocations and load allocations,determining the program of implementation,and setting various milestones in achieving the water quality standards. The CEQA checklist and other portions of the substitute'environmental documents contain.significant analysis and numerous findings related to impacts and mitigation measures. 22: A CEQA Scoping hearing was conducted on November 15,2006 at the City of Camarillo - City Council Chambers,.601 Carmen Drive, Camarillo, California. A notice of the CEQA.Scoping.hearing was sent to interested parties.including.cities and/6r counties with jurisdiction in or bordering the watershed. The notice of CEQA Scoping hearing was also published in the Ventura County Stars on October 10, 2006 23. In preparing the substitute environmental documents, the Regional Board has considered the requirements of Public Resources Code .section 21159' and California Code of Regulations, title 14, section 15187, and intends those,documents to serve as a tier 1 - environmental review. This analysis.is not intended to be an exhaustive analysis of every conceivable impact, but an.analysis of the.reasonably foreseeable consequences of the adoption of this regulation, from a programmatic perspective. Many compliance obligations will be undertaken 'directly by public agencies that will have-their own obligations under CEQA. .In.addition, public agencies including but not limited to Calleguas MWD,Camrosa Water District,Cam.San, City of Thousand Oaks,Simi Valley, Moorpark, VCWW, and. Camarillo are foreseeably expected to facilitate compliance obligations. The "Lead" agencies for such tier 2 projects, will assure compliance with project-level CEQA analysis of this programmatic project. Project level impacts will need to be considered in any subsequent environmental analysis performed by other. public agencies,pursuant to Public Resources Code section 21159.2. Resolution No.R4-2007-016 Page 7 24. The foreseeable methods of compliance of this TMDL entail construction and operation ' of an infrastructure of extraction wells,surface water diversions,pipelines,reverse osmosis facilities,reclaimed.water distribution facilities, a brine export pipeline,and an ocean outfall. These*facilities require planning and implementation which has been underway for a number of years.* Construction activities on several pipeline alignments have been completed and environmental review of the project has been completed for a key area and the ocean outfall.. The above projects have already been subject to extensive environmental review. Both Camrosa Water District and Calleguas Municipal Water District have certified program level EIRs for the Renewable Water Resource Management program for the Southern Reaches of the Calleguas Creek Watershed and the Regional Salinity Management Project that examine the foreseeable environmental impacts from constructing and-operating a system to.comply with the salts TMDL. 25. Consistent with the Regional Board's substantive obligations under CEQA,the substitute environmental documents do not engage in speculation or conjecture, and only consider the reasonably foreseeable environmental impacts, including those relating to.the methods of compliance, reasonably foreseeable feasible mitigation measures to reduce. those impacts, and the reasonably foreseeable alternative means of compliance, which would avoid or reduce the identified impacts. 26. The proposed amendment could have a potentially significant adverse effect on the environment. However,there are feasible alternatives,feasible mitigation measures,or both,that if employed,would substantially lessen the potentially significant adverse impacts identified.in the substitute environmental documents;however such alternatives or mitigation measures are within the-responsibility and jurisdiction of other.publip agencies, and not the Regional Board. Water Code section 13360 precludes the Regional Board from dictating the manner in which responsible agencies comply with any of the Regional Board's regulations or orders. V�hen the agencies responsible for implementing this TMDL determine how they will proceed,the agencies responsible for those parts of the project can and should incorporate such alternatives and mitigation into any subsequent projects or project approvals. These feasible alternatives and mitigation ' measures are described in more detail in the substitute environmental documents. (14 Cal.Code Regs. § 15091(a)(2).) 27. Froixi a program-level perspective, incorporation of the alternatives and mitigation measures outlined in the'substitute environmental documents may not forseeably reduce impacts to less than significant levels. 28. The substitute documents for this TMDL, and in particular the Environmental Checklist and staffs responses.to comments, identify broad mitigation approaches that should be considered at the project level. 29. To th e extent significant.adverse environmental effects could occur, the Regional Board has balanced the economic, legal, social, technological, and other benefits of the TMDL against the unavoidable environmental risks and. finds that specific economic, legal, social,technological; and other benefits of the TMDL outweigh the'unavoidable adverse environmental effects, such that those effects are considered acceptable. The basis for this finding is more fully set forth in the.substitute environmental documents. (14-Cal. Code Regs. § 15093.) Resolution No.R4-2007-016 Page 8 30. Health and Safety Code section 57004 requires external scientific peer review for certain water quality control policies. Prior to public notice.of the draft TMDL, the Regional Board submitted the scientific basis and scientific portions of the Calleguas Creek Watershed Salts TMDL to Professor Ferdi L. Hellweger-for external scientific peer review. The peer review report was received by the Regional Board on April 23, 2007. The peer review found that the proposed TMDL included an appropriate conceptual model; and reasonable allocations and implementation plan to attain water quality objectives. Minor modifications were.made to the scientific portions of the TMDL.to address concerns identified during the peer review process. . 31. The regulatory action meets the"Necessity"standard of the Administrative Procedures Act,Government Code,Section 11353,Subdivision(b). As specified above,Federal law and regulations require that TMDLs be incorporated into the water quality management plan. The.Regional Board's Basin Plan is the Regional Board's component of the water quality management plan,and the Basin Plan is how the Regional Board takes quasi- legislative,planning actions. Moreover,the TMDL is a program of implementation for existing water quality objectives,and is,therefore,appropriately a component of the Basin Plan under Water Code section 13242. The necessity of developing a TMDL is established in the TMDL staff report, the section 303(d)list,and the data contained in the. administrative record documenting the salts impairments of the Calleguas Creek . Watershed. 32. The Basin Plan amendment incorporating a TMDL for salts for the Calleguas Creek Watershed must be submitted for review and approval by the State Water Resources Control Board(State Board),the State Office of Administrative Law (OAL),and the U.S. EPA. The Basin Plan amendment will become effective upon approval by OAL and U.S. EPA. A Notice of Decision will be filed with the Resources Agency. 33. If during the State Board's approval process Regional Board staff,the SWRCB or State Board staff,or OAL determines that minor,non-substantive modifications to the ' language of the amendment are needed for clarity or consistency,the Executive Officer should make such changes consistent with the Regiorial'Board's intent in adopting this TMDL,and should inform the Board of any such changes. THEREFORE,be it resolved that pursuant to sections 13240 and 13242 of the Water Code, the Regional Board hereby amends the Basin Plan as follows: 1. Pursuant to Sections 13240 and 13242 of the California Water Code,the Regional Board, after considering the entire record,including oral testimony at the hearing,hereby adopts the amendments to Chapter.7 of the Water Quality Control Plan for the Los Angeles Region,as set forth in Attachment A hereto;to incorporate the elements of the Calleguas Creek Watershed Salts TMDL: 2. The Regional Board hereby approves and adopts the CEQA substitute environmental documentation and the referenced Environmental Impact Reports entitled"Program Envlironmental Impact Report/Environmental Assessment for the Renewable Water Resource Management Program for the Southern Reaches of the Calleguas Creek Watershed,"and "Supplemental Environmental Impact Report/Environmental Assessment for the Regional Salinity Management Project",including all findings contained therein,which was prepared Resolution No.R4-2007-016 Page 9 in accordance with Public Resources Code section 21159 and.California-Code of Regulations, title 14, section 15187,and directs the Executive Officer to sign the environmental checklist. 3. The Regional Board shall reconsider this TMDL if the Executive Officer determines that adequate flows to protect in-stream beneficial uses may not be maintained. 4. The Executive Officer is directed to forward copies of the Basin Plan amendment to the State Board in accordance with the requirements of section 13245 of the California Water Code. 5. The Regional Board requests that the State Board approve the Basin Plan amendment in accordance with the requirements of sections 13245 and 13246 of the California Water Code . and forward it to OAL and the U.S.EPA. If during the State Board's approval process, Regional Board staff, the State Board or OAL determines that minor, non-substantive modifications to the language of the amendment are needed for clarity or consistency, the Executive Officer may make such changes, and shall inform the Board of any such changes. 6. The Executive Officer is authorized to sign a Certificate of Fee Exemption. I,Deborah J. Smith,Interim Executive Officer, do hereby certify that the-foregoing is a full,true, �rw• . and correct copy.of a resolution adopted by the California Regional Water Quality Control Board, Los Angeles Region,on October 4,2007. October 4,2007 Deborafi Nkmth Date Interim Execu e Officer i i i Exhibit K - Salts TMDL - BPA Attachment A to Resolution No. R4-2007-016 Proposed Amendment to the Water Quality Control Plan - Los Angeles Region to Incorporate the TMDL for Boron, Chloride, Sulfate, and TDS (Salts) in the Calleguas Creek Watershed Exhibit K Attachment A to Resolution No.R4-2007-016 Proposed Amendment to the Water Quality Control Plan—Los Angeles Region to Incorporate the Total Maximum Daily Load for Boron, Chloride,Sulfate,and TDS (Salts) in the Calleguas Creek Watershed Adopted by the California Regional Water Quality Control Board, Los Angeles Region on October 4, 2007 Amendments Table of Contents Add: Chapter 7. Total Maximum Daily Loads (TMDLs) 7- 22 Calleguas Creek Watershed Salts TMDL List of Figures,Tables,and Inserts Add: Chapter 7.Total Maximum Daily Loads (TMDLs) Tables 7-22 Calleguas Creek Watershed Salts TMDL 7-22.1. Calleguas Creek Watershed Salts TMDL: Elements 7-22.2. Calleguas Creek Watershed Salts TMDL: Implementation Schedule Chapter 7. Total Maximum Daily Loads (TMDLs) Calleguas Creek Watershed Salts TMDL This TMDL was adopted by: The Regional Water Quality Control Board on October 4, 2007. This TMDL was approved by: The State Water Resources Control Board on May 20, 2008. The Office of Administrative Law on November 6, 2008. The U.S. Environmental Protection Agency on December 2, 2008. This TMDL is effective on December 2, 2008. The elements of the TMDL are presented in Table 7-22.1 and the Implementation Plan in Table 7-22.2 - 1 - October 4, 2007 Attachment A to Resolution No.R4-2007-016 Table 7-22.1. Calleguas Creek Watershed Salts TMDL: Elements TMDL Element Key Findmgsand Regulatoy Prov�sionSs Problem Eleven of fourteen reaches in the Calleguas Creek Watershed (CCW) Statement are identified on the 2002 Clean Water Act Section 303(4) list of water- quality limited segments as impaired due to elevated levels of boron, chloride, sulfate, or total dissolved solids (TDS) (these constitutions are commonly referred to as salts). Salts primarily impact two beneficial uses: agricultural supply and groundwater recharge. Below is 2002 303(d) list of water quality limited segments of the Calleguas Creek watershed: Reach Name Pollutant/Stressor • Calleguas Creek Reach 3 Chloride,TDS • Calleguas Creek Reach 6 Chloride,Sulfate,TDS • Calleguas Creek Reach 7 Boron,Chloride,Sulfate,TDS • Calleguas Creek Reach 8 Boron,Chloride,Sulfate,TDS • Calleguas creek Reach 9A Sulfate,TDS • Calleguas Creek Reach 9B Chloride,Sulfate,TDS • Calleguas Creek Reach 10 Chloride,Sulfate,TDS • Calleguas Creek Reach 11 Sulfate,TDS • Calleguas Creek Reach 12 Sulfate,TDS �•�' ■ Calleguas Creek Reach 13 Chloride,Sulfate,TDS The list of impaired segments of the Calleguas Creek watershed in the 2002 303(d) list was maintained in the 2006 303(d) list. The segment of Reach 4 below Laguna Road is tidally influenced and therefore not impaired for chloride, boron, sulfate, and TDS. Consequently, the waste load and load allocations developed for Reach 4 in this TMDL do not apply below Laguna Road. The goal of this TMDL is to protect and restore the water quality in the Calleguas Creek watershed by controlling the loading and accumulation of salts. Numeric Targets Numeric targets are based on the site-specific numeric water quality objectives (WQOs)provided in the Basin Plan. 1. Surface Water Quality Objectives Site-specific surface water quality objectives for the Calleguas Creek watershed are applicable upstream of Potrero Road. Site specific objectives have not been determined for Calleguas Creek below Potrero Road because the reach is tidally influenced. Below are WQOs for Calleguas Creek upstream of Potrero Road. -2 - October 4, 2007 Attachment A to Resolution No.R4-2007-016 TMDL Element Key Findings and Regulatory Provisions Water Quality Objective Constituent Upstream Potrero Road Boron 1 Chloride 150 Sulfate 250 TDS 850 2. Groundwater Quality Objectives Groundwater Basin DWR Groundwater Basin as Implementation Boron Chloride Sulfate TDS Basin Listed in the 1994 Areas for Salts (mg/L) (mg/L) (mg/L) (mg/L) No. Basin Plan TMDL Conejo and 4-6 Pleasant Valley Calleguas/Pleasant 1.0 150 300 700 Valle Arroyo Santa Rosa 4-7 Arroyo Santa Rosa and Conejo/Arroyo 1.0 150 300 900 Santa Rosa Las Posas Valley— 48 East of Grimes Arroyo Simi/South 3.0 400 1200 2500 Canyon and Hitch Las Posas Blvd Las Posas Valley— Arroyo Las 4-8 South of LA Ave Posas/South Las 1.0 250 700 1500 ,.� between Somis Rd& Posas Hitch Blvd Las Posas Valley— Arroyo Las 4-8 North Las Posas Area Posas/North Las 1.0 150 250 500 Posas 4-9 Simi Valley Arroyo Simi/Simi 1.0 150 600 1200 Valle Arroyo 4-10 Conejo Valley Conejo/Conejo 1.0 150 250 800 Valle 4-15 Tierra Rejada Arroyo Santa 0.5 100 250 700 Rosafrierra Rejada Arroyo 4-19 Thousand Oaks Conejo/rhousand 1.0 150 700 1400 Oaks The groundwater quality objectives specified in this table are equivalent to the groundwater quality objectives in the 1994 Basin Plan. Groundwater basins are numbered in the fast column according to Bulletin 118-80(Department of Water Resources,1980). Designated groundwater basins in the 1994 Basin Plan are specified in the second column and groundwater basin descriptions of Calleguas Creek used in this TMDL are listed in the third column of the table. Source Analysis Sources of salts in the watershed include water supply (water imported from the State Water Project or Freeman Diversion and deep aquifer groundwater pumping), water softeners that discharge to publicly owned treatment works (POTWs), POTW treatment chemicals, atmospheric deposition,pesticides and fertilizers, and indoor water use (chemicals, cleansers, food, etc.). These salts are then transported through POTW discharges and runoff to surface water, shallow groundwater, and/or stranded on the watershed in the soils. Salts trans orted in the surface water to the ocean are currently the only salts - 3 - October 4, 2007 Attachment A to Resolution No.114-2007-016 TNIDL Element Key 1"ngs and Regulatdry l'rdvisions that are exported from the watershed. While the concentration of salts in the introduced water is usually below the Basin Plan Objectives, the quantity of water brought into the watershed is sufficient to rank introduced water as the greatest source of salts to the watershed. Salts that are transported during dry weather to the surface water are • quantified via the following mechanisms: groundwater pumping, groundwater exfiltration, POTWs, dry weather urban and agricultural runoff. Wet weather loadings from each of these sources have the potential to be significant,but tend to be lower in concentration and do not occur during the critical conditions for salts. Wet weather loads are significant from the perspective of transporting stranded salts off the watershed. Linkage Analysis The linkage analysis for salts focuses on the surface water concentrations of salts. However, surface water concentrations are only one component of the watershed salts issue. Because it is difficult to model other aspects of the salt problem (i.e. surface water and groundwater interactions, stranded salts), two simplified approaches have been used to demonstrate that salts will be removed from the watershed, which should have a correspondingly positive impact on surface water and groundwater salts concentrations. First, a surface water model was developed to provide a linkage between sources and surface water quality and to demonstrate the impact of projects on receiving water quality in the watershed. Second, a salt balance was developed to quantify the removal of salts from the watershed with the goal of achieving a mass balance in which the mass of boron, sulfate, TDS and chloride imported into Calleguas Creek subwatersheds is no more than the mass of boron, sulfate, TDS and chloride exported from the Calleguas Creek subwatershed. Achieving a salt balance in the watershed will prevent additional build-up of salts in any medium in the watershed and protect ground water supplies from increasing in salt concentrations. The Calleguas Creek Modeling System is a mass balance based model that was developed for the surface water to provide a linkage between sources and surface water quality. To estimate the salts balance in the watershed, a simple chloride mass balance was developed by the Camrosa Water District(Hajas, 2003a) and modified to address the other salts. - 4 - October 4, 2007 Attachment A to Resolution No.R4-2007-016 TMDL Element` Key Findings and Regulatory Provisions Waste Load A.POTWs Allocations The TMDL includes waste load allocations (WLAs) for five POTWs in the Calleguas Creek watershed: Simi Valley Water Quality Control Plant(WQCP), Hill Canyon Wastewater Treatment Plan (WWTP), Moorpark WWTP, Camarillo Water Reclamation Plant(WRP), and Camrosa Water Reclamation Facility (WRF). At the end of the implementation period, only Simi Valley WQCP and the Hill Canyon WWTP are expected to discharge to surface waters. Moorpark WWTP and Camrosa WRF currently discharge directly to ponds under dry weather conditions. As part of the TMDL implementation,the Renewable Water Resources Management Program(RWR T)will introduce treated wastewater from the Camarillo WRP into the Camrosa recycled water storage and distribution system. Surplus treated wastewater from Camarillo WRP and Camrosa WRF will be discharged at a point downstream of Potrero Road Bridge to Calleguas Creek. Dry weather WLAs are included for the case when Camarillo WRP, Camrosa WRF, and Moorpark WWTP need to discharge to the stream (for example, if there is insufficient recycled water demand during the wet season). Including WLAs for these POTWs ensures that water quality objectives are not exceeded as a result of their discharge. POTW mass-based WLAs are calculated as the POTW effluent flow rate multiplied by the water quality objective and include a mass-based adjustment factor(AF) that is subtracted from the product of the flow- rate and the water quality objective. The adjustment factor is used to link POTW allocations to the required reductions in background loads. The adjustment factors are implemented through mechanisms that export salts out of the subwatershed, such as groundwater pumping,to meet the salt balance requirements. To ensure that the loading capacity is achieved in surface water and the reductions in background loads are achieved, minimum salt exports shown below are required for POTWs and are included in WLAs as a component of the adjustment factors. If the background load reductions are not achieved, POTWs shall be responsible for providing additional load reductions to achieve water quality standards. The AF is set equal to the difference between the minimum salts export requirement to attain a salt balance in the subject reaches and the actual salts export. If the calculated annual dry weather salt exports from the subwatershed to which the POTW discharges are less than the minimum required exports for the previous year and the annual average receiving water concentration at the base of the subwatershed to which the POTW discharges exceeds water quality objectives for the previous year,the POTW allocations will be reduced using the adjustment factor. - 5 - October 4,2007 Attachment A to Resolution No.R4-2007-016 TMDL Element Key Findn�gs and Regldlatory Prov;tsitalns The adjustment factors are also used to address unusual conditions in which the inputs to the POTWs from the water supply may challenge the POTWs ability to meet the assigned WLAs. The adjustment factor allows for the additional POTW loading only when the water quality objectives are met in the receiving waters. POTW allocations can be adjusted upwards when imported water supply chloride concentrations • exceed 80 mg/L and discharges from the POTW exceed the WLA. In order to apply the AF to the assigned WLAs, the POTW is required to submit documentation of the water supply chloride concentrations, receiving water chloride concentration, the effluent mass, and evidence of increased salt exports to offset the increased discharges from the POTW to the RWQCB for approval. WLAs shown in table below apply to POTWS during dry weather when the flows in the receiving water are below the 86`h percentile flow. During wet weather, the loading capacity of the stream is significantly increased by stormwater flows with very low salt concentrations. Any discharges from the POTWs during wet weather would be assimilated by these large storm flows and would not cause exceedances of water quality objectives. Boron is only listed in the Simi and Pleasant Valley(Revolon) subwatersheds and exceedances of boron do not occur in other portions of the watershed. Therefore,boron allocations are only included for the Simi Valley WQCP. Interim limits are included to allow time for dischargers to put in place implementation measures necessary to achieve final waste load allocations. The monthly average interim limits are set equal to the 95`h percentile of available discharge data. 1. Minimum Salt Export Requirements for Adjustment Factor' Minimum Minimum Minimum Minimum POTW Chloride Export TDS Export Sulfate Export Boron Export (lb/day) (lb/day) (lb/day) (lb/day) Simi Valley WQCP 460 3220 9120 3.3 Moorpark WWTP 460 3220 9120 3.3 Hill Canyon WWTP 1060 7920 4610 0 Camrosa WRF 1060 7920 4610 0 Camarillo WRP 1060 7920 4610 0 e Minimum export requirements include a 10%Margin of Safety. - 6 - October 4, 2007 Attachment A to Resolution No.R4-2007-016 TMDL Element Key Fllnd><ngs and.RegWatory Provisions 2. Interim Monthly Average WLAs for POTWs Chloride Sulfate Boron P07W (mg/L) TDS(mg/L) (mg/L) (mg/L) Simi Valley WQCP 183 955 298 N/A Hill Canyon WWTP 189 N/A WA N/A Moorpark WWTP 171 WA 267 N/A Camarillo WRP 216 1012 283 N/A Camrosa WRF* N/A N/A N/A WA *Camrosa WRF has not discharged to surface water during the period under which interim limits were calculated. When effluent data are available,the Regional Board may adopt interim WLAs for Camrosa WRF. N/A: The 95"percentile concentration is below the Basin Plan objective so interim limits are not necessary. 3. Final WLAs for POTWsa'd Chloride TDS(lb/day)` Sulfate Boron POTW (lb/day)` (lb/day)` (lb/day)' Simi Valley 150*Q-AF 850*Q-AF 250*Q-AF 1.0'Q-AF WQCP Hill Canyon 150*Q-AF 850*Q-AF 250*Q-AF N/A WWTP Moorpark WWTP° 150*Q-AF 850*Q-AF 250*Q-AF N/A Camarillo 150*Q-AF 850*Q-AF 250*0-AF N/A WRP° Camrosa WRF° 150*Q-AF 850*Q-AF 250*Q-AF N/A a. The allocations shown only apply during dry weather(as defined in this TMDL). During wet weather discharges from the POTWs do not cause exceedances of water quality objectives. b. These POTWs are not expected to discharge after the end of the implementation period. c. AF is the adjustment factor and equals the difference between the minimum salts export requirement and the actual salts export. d. Q represents the POTW flow at the time the water quality measurement is collected and a conversion factor to lb/day based on the units of measurement for the flow. N/A Boron is not listed in the reaches to which the POTW discharges. No WLA is required. B.Urban Runoff Permitted stormwater dischargers that are responsible parties to this TMDL include the Municipal Stormwater Dischargers (MS4s) of the Cities of Camarillo, Moorpark, Thousand Oaks, County of Ventura, Ventura County Watershed Protection District, and general industrial and construction permittees. Permitted stormwater dischargers are assigned a dry weather wasteload allocation equal to the average dry weather critical condition flow rate multiplied by the numeric target for each constituent. Waste load allocations apply in the receiving water at the base of each subwatershed. Because wet weather flows transport a large mass of salts at low concentrations, these dischar ers meet water - 7 - October 4, 2007 Attachment A to Resolution No.R4-2007-016 y� TMDL Element Key Findings and Regulatory Provisions quality objectives during wet weather. Dry weather allocations apply when instream flow rates are below the 86`h percentile flow and there has been no measurable precipitation in the previous 24 hours. Interim limits are assigned for dry weather discharges from areas covered by NPDES stormwater permits to allow time to implement • appropriate actions. The interim limits are assigned as concentration based receiving water limits set to the 95`h percentile of the discharger data as a monthly average limit except for chloride. The 95`h percentile for chloride was 267 mg/L which is higher than the recommended criteria set forth in the Basin Plan for protection of sensitive beneficial uses including aquatic life. Therefore,the interim limit for chloride for Permitted Stormwater Dischargers is set equal to 230 mg/L to ensure protection of sensitive beneficial uses in the Calleguas Creek watershed. 1. Interim Dry Weather WLAs for Permitted Stormwater Dischargers Constituent Interim Limit(mg/L) Boron Total 1.3 Chloride Total 230 Sulfate Total 1289 TDS Total 1720 2. Final Dry Weather WLAs for Permitted Stormwater Dischargers Critical Condition Chloride TDS Sulfate Boron Flow Rate Allocation Allocation Allocation Allocation Subwatershed (mgd) (lb/day) (lb/day) (lb/day) (lb/day) Simi 1.39 1,738 9,849 2,897 12 Las Posas 0.13 157 887 261 N/A Conejo 1.26 1,576 8,931 2,627 N/A Camarillo 0.06 72 406 119 N/A Pleasant Valley 0.12 150 850 250 N/A (Calleguas) Pleasant Valley 0.25 314 1,778 523 2 (Revolon) - 8 - October 4,2007 Attachment A to Resolution No.R4-2007-016 TNIDL Element: Key Findings P Regulatoiry Provisions C.Final WLAs for Other NPDES Dischargers Concentration-based WLAs are assigned at the Basin Plan objectives for other NPDES dischargers. Constituent Allocation(mg/L) Chloride 150 TDS 850 Sulfate 250 Boron" 1.0 Other NPDES dischargers include,but are not limited to,permitted groundwater cleanup projects that could have significant salt concentrations as a result of the stranded salts in the shallow groundwater basins being treated. To facilitate the cleanup of the basins prior to alternative discharge methods (such as the brine line)being available, interim limits for other NPDES dischargers will be developed on a case-by-case basis and calculated as a monthly average using the 95`h percentile of available discharge data. Load Allocations Dry weather load allocations are assigned as a group allocation to irrigated agricultural discharges. The load allocation (LA) is equal to the average dry weather critical condition flow rate multiplied by the numeric target for each constituent. Load allocations apply in the receiving water at the base of each subwatershed. Because wet weather flows transport a large mass of salts at a typically low concentration, these dischargers should meet water quality objectives during wet weather. Dry weather allocations apply when instream flow rates are below the 86`h percentile flow and there has been no measurable precipitation in the previous 24 hours. Interim limits are assigned for dry weather discharges from irrigated agricultural areas to allow time to implement appropriate actions. The interim limits are assigned as concentration based receiving water limits set to the 95`h percentile of the discharger data as a monthly average limit except for chloride. The 95`h percentile for chloride was 499 mg/L which is higher than the recommended criteria set forth in the Basin Plan for protection of sensitive beneficial uses including aquatic life. Therefore, the interim limit for chloride for Irrigated Agricultural Dischargers is set equal to 230 mg/L to ensure protection of sensitive beneficial uses in the Calleguas Creek watershed. - 9 - October 4,2007 Attachment A to Resolution No.R4-2007-016 TMDL Element Key FYnd><ngs and Regulatory Pro igions I. Interims Load Allocations for Irrigated Agricultural Dischargers Constituent Interim Limit(mg/L) Boron Total 1.8 Chloride Total 230 Sulfate Total 1962 TDS Total 3995 I. Final Load Allocations for Irrigated Agricultural Dischargers Chloride TDS Sulfate Boron Allocation Allocation Allocation Allocation Subwatershed (lb/day) (lb/day) (lb/day) (lb/day) Simi 641 3,631 1,068 4 Las Posas 2,109 11,952 3,515 N/A Conejo 743 4,212 1,239 N/A Camarillo 59 336 99 N/A Pleasant Valley 305 1,730 509 N/A Revolon 7,238 1 41,015 12,063 48 Margin of Safety A margin of safety(MOS)for the TMDL is designed to address uncertainties in the analysis that could result in targets not being achieved in the waterbodies. The primary uncertainties associated with this TMDL include the impact of implementing a salt balance on receiving water quality. The effect of the salt balance is estimated by the mass-balance and subject to the following uncertainties: 1)the flow rates used to determine the loading capacity may change due to TMDL implementation, 2) the use of a daily load for determining allocations and an annual mass balance to attain water quality objectives, and 3) the sources of salts may not be completely known. Both implicit and explicit MOS are included for this TMDL. The implicit MOS stems from the use of conservative assumptions made during development of the TMDL. The mass of salts transported out of the watershed during wet weather is on average over 15% of the annual mass of salts introduced to the watershed for all constituents. The salt export during wet weather ranges from 7% to 41% for TDS, 9% to 48% for chloride, and 13% to 89% for sulfate of the export required to meet a salt balance in the watershed. This mass is not used to determine compliance with the salt balance and represents a significant implicit margin of safety. The model also contains a component that serves to model the impact of "stranded" salts in the watershed. The component assumes low irrigation efficiencies and the ability of all salts applied as irrigation water anywhere in the watershed to be discharged to receiving water in - 10 - October 4, 2007 Attachment A to Resolution No. R4-2007-016 TMDL`Element Key Findings and Regulatory Provisions critical years. This likely overestimates the impact of"stranded" salts and results in a higher concentration of salts due to irrigation in the receiving water. An explicit MOS of 10% is applied to the adjustment factors for the POTWs to account for the uncertainties in the TMDL analysis. By applying the margin of safety to the adjustment factor, more salts are required to be exported than are necessary to offset the background loads in the watershed. This additional salt export provides a margin of safety on the salt balance to address uncertainties that the salt balance will result in compliance with water quality objectives. The l0% explicit MOS is determined sufficient to address the uncertainties associated with the estimated impact of the salt balance on receiving water loadings. Future Growth Ventura County accounts for slightly more than 2% of the state's residents with a population of 753,197 (US Census Bureau, 2000). GIS analysis of the 2000 census data yields a population estimate of 334,000 for the CCW, which equals about 44% of the county population. According to the Southern California Association of Governments (SCAG), growth in Ventura County averaged about 51%per decade from 1900-2000; with growth exceeding 70% in the 1920s, 1950s, and �- 1960s. Significant population growth is expected to occur within and near present city limits until at least 2020. Increased growth requires additional water. Therefore,future growth could result in increased loads of salts being imported into the watershed. However, the TMDL implementation plan is designed to maintain a salts balance in the watershed. If additional salts are imported into the watershed, a larger volume of salts will also be exported out of the watershed to maintain the balance. Consequently,increased imports from future growth are not expected to result in higher concentrations in receiving waters. Seasonal The critical condition for salts is during dry weather periods. During Variations and wet weather, stormwater flows dilute the salt discharges and receiving Critical water concentrations are significantly lower than water quality Conditions objectives. Dry weather, defined as days with flows lower than the 86`h percentile flow and no measurable precipitation, is a critical condition regardless of the dry weather flows in the stream. The driving conditions for exceedances of water quality objectives are the concentrations in the water supply (which is driven by surface water concentrations in Northern California) and the previous year's annual precipitation and corresponding flows. Elevated salts concentrations during dry weather occur when stranded salts are discharged into the surface water after higher than average rainfall years. The elevated concentrations occur during ears when the previous annual flow is - 11 - October 4, 2007 Attachment A to Resolution No.R4-2007-016 TMDL,Element, Key Findings and Regulatory Provisions greater than the 75 percentile of the annual flows for the watershed (critical year). The higher concentrations occur during the dry periods of critical years regardless of whether the annual flow for the critical year is an average flow year, higher than average year, or lower than average year. The key parameter determining a critical year is the total annual flow volume for the previous year. Based on model results, four critical years were defined based on modeled results that resulted in receiving water concentrations greater than the 99`h percentile concentration during at least 10% of the dry period. The critical years identified from the model occur with conditions similar to what occurred in 1978, 1979, 1983 and 1998. Special Studies _Special Studies and Monitoring Plan Several special studies are planned to improve understanding of key aspects related to achievement of WLAs and LAs for the Salts TMDL. 1. Special Study#1 (Optional)—Develop Averaging Periods and Compliance Points The TMDL technical report has provided information that shows instantaneous salts objectives may not be required to protect groundwater recharge and agricultural beneficial uses. It is possible that the beneficial uses will be protected and a salt balance achieved without achieving instantaneous water quality objectives in all reaches of the watershed. This optional special study is included to allow an investigation of averaging periods for the salts objectives in the CCW. Additionally, this study will investigate the locations of beneficial uses and the possibility of identifying compliance points for the salts objectives at the point of beneficial use impacts. The use of compliance points would alleviate the need to develop site-specific objectives for the reaches of the watershed upstream of the POTW discharges (described in Special Study#3) while still ensuring the protection of beneficial uses. Sensitive beneficial uses are not present in the upper reaches and POTW discharges dilute the salts from the upper reaches and may allow compliance with the objectives at the point of groundwater recharge downstream. This is an optional special study to be conducted if desired by the stakeholders or determined necessary or appropriate by the Executive Officer. 2. Special Study#2 (Optional)—Develop Natural Background Exclusion Discharges of groundwater from upstream of the Simi Valley WQCP (Reaches 7 and 8) and Hill Canyon WWTP (Reaches 12 and 13) and r - 12 - October 4,2007 Attachment A to Resolution No.R4-2007-016 TMDL Element Key Findings and Regulatory Provisions downstream of the Camrosa WRF(Reach 3) contain high salts concentrations. Natural marine sediments may contribute to the high concentrations in those discharges. This special study would evaluate whether or not the groundwater discharges in these areas would qualify for a natural sources exclusion. The special study could follow a `reference system/anti-degradation approach' and/or a `natural sources exclusion approach' for any allocations included in this TMDL that are proven unattainable due to the magnitude of natural sources. The purpose of a `reference system/anti-degradation approach' is to ensure water quality is at least as good as an appropriate reference site and no degradation of existing water quality occurs where existing water quality is better than that of a reference site. The intention of a `natural sources exclusion approach' is to ensure that all anthropogenic sources of salts are controlled such that they do not cause exceedances of water quality objectives. These approaches are consistent with state and federal anti-degradation policies (State Board Resolution No. 68-16 and 40 C.F.R. 131.12). This is an optional special study to be conducted if desired by the stakeholders or determined necessary for establishing a natural sources exclusion by the Executive Officer. 3. Special Study#3 (Optional)—Develop Site-Specific Objectives The TMDL implementation plan provides for actions to protect the agricultural and groundwater recharge beneficial uses in the CCW. As shown in the linkage analysis, some downstream reaches may not achieve the water quality objectives through implementation of this TMDL because of the transport of salts out of the watershed through those reaches. Consequently, an optional special study is included to allow the CCW stakeholders to pursue development of site-specific objectives for salts for reaches upstream of the Hill Canyon WWTP and Simi Valley WQCP (Reaches 7, 8, 12, and 13), Calleguas Creek Reach 3, Revolon Slough (Reach 4) and Beardsley Wash (Reach 5). These alternative numeric water quality objectives would be developed based on the beneficial uses to be protected in a reach and the attainability of the current water quality objectives. This is an optional special study to be conducted if desired by the stakeholders or determined necessary or appropriate by the Executive Officer. 4. Special Study#4(Optional)—Develop Site-Specific Objectives for Drought Conditions During drought conditions, the load of salts into the watershed increases as a result of increasing concentrations in imported water. Stakeholders in the CCW cannot control the increased mass entering the watershed from the water supply. However, the stakeholders do have the ability to - 13 - October 4, 2007 Attachment A to Resolution No. R4-2007-016 ,� TMDL Element Key.�ndings and ReMatory.Provisions manage the salts within the watershed to protect beneficial uses and export the additional mass of salts out of the watershed. If necessary, site-specific objectives may be developed to address situations that result in higher imported water salt concentrations to allow management of the salts and protection of beneficial uses. This special study may be combined with Special Study#3 if desired. • This is an optional special study to be conducted if desired by the stakeholders or determined necessary or appropriate by the Executive Officer of the Regional Board. 5. Special Study#5(Optional)—Develop Site-Specific Objectives for Sulfate Sulfate is a necessary nutrient for plant growth and sulfate containing products are often applied to agriculture as fertilizers and pesticides. Therefore, site-specific objectives may be investigated and developed for sulfate that more accurately protects agricultural supply beneficial uses. Additionally,this study could evaluate whether or not a sulfate balance is necessary to maintain in the watershed. This special study may be combined with Special Study#3 and/or#4 if desired. This is an optional special study to be conducted if desired by the stakeholders or determined necessary or appropriate by the Executive Officer of the Regional Board. Monitoring Plan To ensure that the goal of a salts balance in the watershed is being achieved and water quality objectives are being met, a comprehensive method of tracking inputs and outputs to the watershed will be developed. A monitoring plan will be submitted to the RWQCB for Executive Officer approval within six months of the effective date of the CCW Salts TMDL. Monitoring will begin one year after Executive Officer approval of the monitoring plan to allow time for the installation of automated monitoring equipment. 1. Input Tracking Inputs to the watershed are tracked through four mechanisms:l) Information on the import of State Water Project water is readily available and provides information on the mass of salts brought into the watershed; 2) Groundwater pumping records provide information on the mass of salts imported into the watershed from deep aquifer pumping; 3) Import records of water supply form the Santa Clara River can be obtained to determine the mass of salts imported through this source;4) Monitoring data on imported water quality can be compared to - 14 - October 4,2007 Attachment A to Resolution No. R4-2007-016 TMDL-Element` Key Findmgs and Regulatory Provisions monitoring of effluent quality to estimate the amount of salts added through human use of the water. 2. Output Tracking and Determining Compliance with Water Quality Objectives Outputs from the watershed will be tracked through surface water monitoring at key locations in the watershed and monitoring of discharges to the brine line. Monitoring will include both flow and quality. Compliance with water quality objectives will be determined at key locations where beneficial uses occur in the watershed. The stations used for output tracking will also be used to determine compliance with water quality objectives. The monitoring program will determine if the TMDL compliance points are protective of the beneficial uses for the subwatershed. If the monitoring determines that the compliance points are not protective of beneficial uses, an alternative compliance point will be selected. The Executive Officer may revise the TMDL compliance point based on the result of the monitoring. Additionally, if other places in the watershed are identified where sensitive beneficial uses occur, water quality monitoring stations can be added to determine compliance with water quality objectives. For the RWRMP, three new or upgraded automated flow measuring and sample collection stations will be installed at three points on the stream system to continuously record flow and various water quality parameters during dry weather. Preliminary monitoring locations include Arroyo Conejo in Hill Canyon, Conejo Creek at Baron Brothers Nursery and Calleguas Creek at University Drive. For the NRRWMP, one new or upgraded automated flow measuring and sample collection station will be added downstream of Simi Valley at the point at which groundwater recharge begins. A preliminary monitoring location is at Hitch Blvd. where an existing flow gauging station exists. However,the amount of groundwater recharge upstream of this site will need to be evaluated to determine the exact monitoring location. For Revolon Slough, the existing monitoring station at Wood Road. will be used to monitor quality and flow on Revolon Slough to determine the outputs from the Revolon portion of the Pleasant Valley subwatershed. Additional land use monitoring will be conducted concurrently at representative agricultural and urban runoff discharge sites as well as at POTWs in each of the subwatersheds and analyzed for chloride,TDS, sulfate, and boron. The location of the land use stations will be determined before initiation of the Calleguas Creek Watershed TMDL Monitoring Program(CCWTMP). All efforts will be made to include at least two wet weather sampling events during the wet season (October through A ril) during a targeted storm event. - 15 - October 4, 2007 Attachment A to Resolution No.R4-2007-016 T1VIDL EIement Key Findings and Regulatory.Prov�sions 3. Reporting and Modification of the Calleguas Creek Watershed TMDL Monitoring Program A monitoring report will be prepared annually within six months after completion of the final event of the sampling year. An adaptive • management approach to the CCWTMP will be adopted as it may be necessary to modify aspects of the CCWTMP. Results of sampling carried out through the CCWTMP and other programs within the CCW may be used to modify this plan, as appropriate. These modifications will be summarized in the annual report. Possible modifications could include,but are not limited to the, following: • The inclusion of additional land use stations to accurately characterize loadings; • The removal of land use stations if it is determined they are duplicative (i.e., a land use site in one subwatershed accurately characterize the land use in other subwatersheds); • The inclusion of additional in-stream sampling stations; and • The elimination of analysis for constituents no longer identified in land use and/or instream samples. k.�• If a coordinated and comprehensive monitoring plan is developed and meets the goals of this monitoring plan that plan should be considered as a replacement for the CCWTMP. 4. Other Monitoring Other surface water and groundwater monitoring will be implemented as necessary to assess the impacts of the implementation actions and adjust the activities as necessary to protect beneficial uses and achieve the salts balance. Examples of additional monitoring that may be conducted include: • Monitoring under Phase 2 and 3 of the RWRMP to evaluate the effects of replenishment water releases and groundwater treatment and releases. • Monitoring to assess the impacts of management of the Simi Basin groundwater dewatering wells under Phase 1 of the NRRWMP. Implementation The identified implementation actions provided in this TMDL will Plan result in a salt balance in the stream and are expected to result in compliance with the allocations. The implementation plan is comprised of actions that directly impact discharges to the receiving water and actions that will indirectly impact discharges to receiving water. Res onsible agencies and jurisdictions shall consider minimum flow �.r.v - 16 - October 4,2007 Attachment A to Resolution No.R4-2007-016 T MDL Elemeat Key Findings.and Regulatory ProVsioas requirements that may be imposed by federal or state regulatory agencies when implementing actions to comply with this TMDL. Should the proposed implementation actions not result in compliance with objectives and site-specific objective are not adopted, additional implementation actions may be required to achieve the water quality objectives. Any plans or programs for implementation of the TMDL for the Southern Reaches of the CCW upstream of the Conejo Creek Diversion and the Northern Reaches of the CCW, that would result in significant reduction in instream flow, including but not limited to, an application for Water Reclamation Requirements (WRRs) shall include an analysis of potential impacts to instream beneficial uses that could result from the reclamation of wastewater or extracted groundwater. For Phase 1 of the Southern Reaches of the CCW Renewable Water Resource Management Program (RWRMP),Water Rights Decision 1638 from SWRCB satisfies these requirements and establishes the minimum flow requirements for Conejo and Calleguas Creek downstream of the Conejo Creek Diversion Project. Any WRRs shall require that timely written notice be given to the Regional Board, and to any regulatory agency whose instream flow is at issue, if diversion or reclamation of waste water or extraction of groundwater results or threatens to result in (or contributes to) insufficient flows to maintain beneficial uses. The Executive Officer shall issue an order pursuant to Water Code section 13267, which requires responsible agencies and jurisdictions to file a technical report if reclamation of waste water or extraction of groundwater results or threatens to result in (or contributes to)insufficient flows to maintain beneficial uses. The order shall require that the technical report identify the causes of the impairments or threatened impairments, and identifies options to abate the conditions. The Regional Board shall reconsider this TMDL if adequate flows to protect instream beneficial uses are not maintained. The implementation actions described in the TMDL represent a range of activities that could be conducted to achieve a salts balance in the watershed. Future considerations may result in other actions being implemented rather than the options presented. However, any proposed actions will be reviewed using the salt balance model to ensure the action does not adversely impact other implementation actions in the watershed or the salt balance of a downstream subwatershed. Currently, the implementation plan is presented in phases with a tentative schedule for each phase. The implementation of projects may occur earlier than planned or begin during an earlier phase. Additionally, many of the implementation actions require the use of the Regional Salinity Management Conveyance (RSMC or brine line). As such, the implementation schedule for those actions will be linked the - 17 - October 4, 2007 Attachment A to Resolution No. R4-2007-016 TMDL Element n Keyndmgs and Regulatory Pcov>ts><ons construction schedule for the RSMC. The implementation plan for the Salts TMDL includes regional and subwatershed specific implementation actions. There are four key structural elements to the regional implementation: Regional Salinity Management Conveyance (RSMC),Water Conservation,Water • Softeners, and Best Management Practices for Irrigated Agriculture. Subwatershed implementation includes Renewable Water Resource Management Program (RWRMP) for the Southern Reaches and Northern Reach Renewable Water Management Plan (NRRWMP). Detailed discussion for each implementation element including description of the action, status and schedule for implementing the action, and a summary of the expected contribution to achievement of the salts balance are provided in the Staff Report and Technical Report for this TMDL. Proposed implementation actions in the watershed, responsible agencies, and the estimated completion date based on the effective date of the TMDL are summarized below. Summary of Proposed Implementation Actions Action Responsible Agencyties Schedule for Completion Water Conservation POTWs,Permitted Stormwater Dischargers,and Other NPDES 3 years Pennittees Water Softeners POTWs and Permitted Stormwater 10 years Dischargers Best Management Practice Agricultural Dischargers 2 years for Agricultural Dischargers RMSC Phase 1 Calleguas Municipal Water District 2 year RMSC Phase 2 Calleguas Municipal Water District 5 year RMSC Phase 3 Calleguas Municipal Water District 10 years RWRMP Phase 1 CamrosaWater District,Camarillo 3 years Sanitation District RWRMP Phase 2 Camrosa Water District,City of 6 years Thousand Oaks RWRMP Phase 3 Camrosa Water District,City of 10 years Thousand Oaks RWRMP Phase 4 To Be Determined 15 years NRRWMP Phase 1 Calleguas Municipal Water District, City of Simi Valley,Ventura County 3 years Water Work-District No.1 NRRWMP Phase 2 Calleguas Municipal Water District, Ventura County Water Work-District 7 years No.1,City of Camarillo NRRWMP Phase 3 City of Camarillo, City of Simi 10 years Valley NRRWMP Phase 4 To Be Determined 15 years Final Completion Date 15 years - 18 - October 4, 2007 Attachment A to Resolution No.R4-2007-016 ',TMDL Element" Key)E�ndmgs and Regulatory Provisions The sections below provide discussion of the application of the final WLAs for POTWs, specific permitted stormwater discharges, other NPDES dischargers, and agricultural dischargers. I. POTWs,permitted stormwater discharges,and other NPDES discharges The final WLAs will be included for permitted stormwater discharges, POTWs, and other NPDES discharges in accordance with the compliance schedules provided in Table 7-22.2. The Regional Board may revise these WLAs based on additional information developed through special studies and/or monitoring conducted as part of this TMDL. ■ POTWs WLAs established for the POTWs in this TMDL will be implemented through NPDES permit limits. Compliance will be determined through monitoring of final effluent discharge as defined in the NPDES permit. The proposed permit limits will be applied as end-of-pipe mass- based monthly average effluent limits. Daily maximum effluent limit is not required because chloride is not expected to have an immediate or acute effect on the beneficial uses. Compliance with the minimum salt export requirements for POTWs will be based on the salt export from the subwatershed to which they discharge. The mechanisms for meeting the minimum salt export requirements and for monitoring progress towards meeting those requirements will be included in the monitoring program work plan and approved by the Executive Officer. At the end of each year, the amount of salt exported will be compared to the minimum required salt export. POTW allocations will be reduced using the adjustment factor if both of the following conditions occur: • The annual dry weather salt exports from the subwatershed to which the POTW discharges are below the minimum required exports for the previous year; and • The water quality objectives were exceeded in the receiving water at the base of the subwatershed The POTW allocations will be reduced for the following year by 6 - 19 - October 4, 2007 Attachment A to Resolution No.R4-2007-016 TMDL'Element Key Findings.and,Regulatory Provisions the difference between the minimum required salt export and the actual amount exported. The discharger shall be notified by the Regional Board that the assigned WLAs are reduced and the reduced effluent limits shall be applied for the next year. If the POTW allocations are reduced, the POTW will need to increase the amount of salt export or reduce the mass of salts discharged from the POTW before the end of the following year when the adjustment will be evaluated again. POTWs can only request to adjust the assigned WLAs upwards using the adjustment factor under limited conditions provided below: • Water quality objectives are met in the receiving waters; • Imported water supply chloride concentrations exceed 80 mg/L; and • Discharges from the POTW exceed the allocation. When imported water supply chloride concentrations exceed 80 mg/L, the POTW will monitor the effluent to determine if the wasteload allocation is exceeded. If the wasteload allocation is exceeded and the POTW desires an adjustment to the allocation, the �• POTW will submit documentation of the water supply chloride concentrations, the receiving water chloride concentration, the effluent mass, and the evidence of increased salt exports to offset the increased discharges from the POTW to the Regional Board for approval. The adjustment factor will apply for three months and the POTW must submit the evidence outlined above every three months to keep the adjustment factor active. As long as the required information is submitted, the adjustment factor will be in effect upon notification in writing from the RWQCB. ■ Urban Stormwater Discharger A group mass-based dry weather WLA has been developed for all permitted stormwater discharges, including municipal separate storm sewer systems (MS4s), and general industrial and construction stormwater permits. USEPA regulation allows allocations for NPDES-regulated stormwater discharges from multiple point sources to be expressed as a single categorical WLA when the data and information are insufficient to assign each source or outfall individual WLAs (40 CFR 130). The grouped allocation will apply to all NPDES-regulated municipal stormwater discharges in the CCW. MS4 WLAs will be incorporated into the NPDES r �.r - 20 - October 4,2007 Attachment A to Resolution No. R4-2007-016 TMDL Element Key Findings:and Regulatory Provisions permit as receiving water limits measured in-stream at the base of each subwatershed. ■ Other NPDES Dischargers WLAs established for other NPDES permitted dischargers in this TMDL, including minor non-stormwater permittees (other than Camrosa WRP) and general non-stormwater permittees, will be implemented through NPDES permit limits. The proposed permit limits will be applied as end-of-pipe concentration-based effluent limits, and compliance determined through monitoring of final effluent discharge as defined in the NPDES permit. II. Agriculture Load allocations for salts will be implemented through Conditional Waiver of Discharges from Irrigated Lands (Conditional Waiver Program) adopted by the LARWQCB on November 3, 2005. Compliance with LAs will be measured in-stream at the base of the subwatersheds and will be achieved through the implementation of Best Management Practices (BMPs) consistent with the Conditional Waiver Program. The Conditional Waiver Program requires the development of an agricultural water quality management plan (AWQMP)to address pollutants that are exceeding receiving water quality objectives as a result of agricultural discharges. Therefore, implementation of the load allocations will be through the development of an agricultural management plan for salts. Implementation of the load allocations will also include the coordination of BMPs being implemented under other required programs to ensure salts discharges are considered in the implementation. Additionally, agricultural dischargers will participate in educational seminars on the implementation of BMPs as required under the Conditional Program. Studies are currently being conducted to assess the extent of BMP implementation and provide information on the effectiveness of BMPs for agriculture. This information will be integrated into the AWQMP that will guide the implementation of agricultural BMPs in the Calleguas Creek watershed. After implementation of these actions, compliance with the allocations and TMDL will be evaluated and the allocations reconsidered if necessary based on the special studies and monitoring plan section of the implementation plan. As shown in Table 7-22.2, implementation of LAs will be conducted over a period of time to allow for implementation of the BMPs, as well as coordination with special studies and err - 21 - October 4, 2007 Attachment A to Resolution No. R4-2007-016 TMDL Element 'X�ey Fndings and Regulatory Provisions implementation actions resulting from other TMDL Implementation Plans (Nutrient, Historic Pesticides and PCBs, Sediment, Metals, Bacteria, etc.). - 22 - October 4, 2007 Attachment A to Resolution No. R4-2007-016 Table 7-22.2 Calleguas Creek Watershed Salts TMDL: Implementation Schedule -Item Im lementntion Action- R risible Party Conipletion Date ' POTWs,Permitted 1 Effective date of interim Salts TMDL waste load allocations Stormwater Dischargers' Effective date of the (WLAs) (PSD),and Other amendment NPDES Permittees 2 Effective date of interim Salts TMDL load allocations(LAs) Agricultural Dischargers Effective date of the amendment 3 Responsible jurisdictions and agencies shall submit POTWs,PSD,Other 6 months after compliance monitoring plan to the Los Angeles Regional ' NPDES Permittees,and effective date of the Board for Executive Officer approval. Agricultural Dischargers TMDL 4 Responsible jurisdictions and agencies shall begin POTWs,PSD,Other 1 year after monitoring as outlined in the approved monitoring plan. NPDES Permittees,and monitoring plan Agricultural Dischargers approval by Executive Officer 5 Responsible jurisdictions and agencies shall submit POTWs,PSD,Other Within 10 years of workplans for the optional special studies. NPDES Permittees,and effective date of the Agricultural Dischargers TMDL 6 Responsible jurisdictions and agencies shall submit results POTWs,PSD,Other 2 years after of the special studies. NPDES Permittees,and workplan approval by Agricultural Dischargers Executive Officer 7 Re-evaluation of the interim WLAs and interim LAs for POTWs,PSD,Other 3 years after effective boron,chloride,sulfate,and TDS based on new data. NPDES Permittees,and date of the TMDL Responsible jurisdictions and agencies shall demonstrate Agricultural Dischargers that implementation actions have reduced the boron,sulfate, TDS,and chloride imbalance by 20%. 8 Re-evaluation of the interim WLAs and interim LAs for POTWs,PSD,Other 7 years after effective boron,chloride,sulfate,and TDS based on new data. NPDES Permittees,and date of the TMDL Responsible jurisdictions and agencies shall demonstrate Agricultural Dischargers that implementation actions have reduced the boron,sulfate, TDS and chloride imbalance by 40%. 9 Re-evaluation of the interim WLAs and interim LAs for POTWs,Permitted 10 years after boron,chloride,sulfate,and TDS based on new data. Stormwater Dischargers effective date of the Responsible jurisdictions and agencies shall demonstrate (PSD),Other NPDES TMDL that implementation actions have reduced the boron,sulfate, Permittees,and TDS,and chloride imbalance by 70%. Agricultural Dischargers 10 The Los Angeles Regional Board shall reconsider this The Regional Board 12 years after TMDL to re-evaluate numeric targets,WLAs,LAs and the effective date of the implementation schedule based on the results of the special TMDL studies and/or compliance monitoring. 11 Responsible jurisdictions and agencies shall demonstrate POTWs,PSD,Other 15 years after that the watershed has achieved an annual boron,sulfate, NPDES Permittees,and effective date of the TDS,and chloride balance. Agricultural Dischargers TMDL 12 The POTWs and non-storm water NPDES permits shall POTWs and Other 15 years after achieve WLAs,which shall be expressed as NPDES mass- NPDES Permittees effective date of the based effluent limitation specified in accordance with TMDL federal regulations and state policy on water quality control. Permitted stormwater dischargers that are responsible parties to this TMDL include the Municipal Stormwater Dischargers(MS4s)of the Cities of Camarillo,Moorpark,Thousand Oaks,County of Ventura, .+� Ventura County Watershed Protection District,and general industrial and construction permittees. - 23 - October 4, 2007 Attachment A to Resolution No.R4-2007-016 Item. Ln lementation'Action': Res nsible Party Com letion'Date 13 Irrigated agriculture shall achieve LAs,which will be Agricultural Dischargers 15 years after implemented through the Conditional Waiver for Irrigated effective date of the Lands as mass-based receiving water limits. TMDL 14 The permitted stormwater dischargers shall achieve WLAs, Permitted Stormwater 15 years after which shall be expressed as NPDES mass-based limits Dischargers effective date of the specified in accordance with federal regulations and state TMDL policy on water quality control. 15 Water quality objectives will be achieved at the base of the POTWs,PSD,Other 15 years after subwatersheds designated in the TMDL. NPDES Permittees,and effective date of the Agricultural Dischargers TMDL - 24 - October 4, 2007