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Home My WebLink AboutAGENDA REPORT 2014 0917 CCSA REG ITEM 09A ITEM 9.A. CITY OP MOORPARK,CALIFORNIA City Council Meeting of 9—/7—A0/4 MOORPARK CITY COUNCIL AGENDA REPORT Actor_/ BY: CA, . P -� TO: Honorable City Council \1g�,I l i FROM: Dave Klotzle, City Engineer/Public Works Director It Prepared by: John Brand, Senior Management Analyst DATE: September 5, 2014 (CC Meeting of 09/17/14) SUBJECT: Consider Presentation on the Ventura County Waterworks District No. 1 Moorpark Wastewater Treatment Plant Desalter Project SUMMARY A presentation on the proposed desalter project at the Moorpark Wastewater Treatment Plant will be given to the City Council by Mr. Reddy Pakala, Director of Ventura County Waterworks District No. 1 (District). Water supply planning efforts and local water resource evaluation studies have identified a large quantity of relatively poor quality water in the Las Posas Groundwater Basin from Moorpark to Somis. Studies have been conducted by the District to develop an understanding of the feasibility of pumping and desalting this poor quality groundwater which could then be purveyed for beneficial use by municipal, industrial, and agricultural customers. Water in the Las Posas Basin must be treated prior to use because of the relatively high level of dissolved solids, sulfate and chloride concentrations. One treatment method is a membrane treatment process which uses reverse osmosis. The proposed desalination plant will be near Hitch Boulevard and West Los Angeles Avenue, with the waste brine discharging into Calleguas Municipal Water District's proposed "brine line," the Regional Salinity Conveyance Pipeline, which will ultimately run from Simi Valley to the ocean at Port Hueneme. FISCAL IMPACT None. STAFF RECOMMENDATION Receive presentation on the Ventura County Waterworks District No. 1 Moorpark Wastewater Treatment Plant Desalter Project. 37 ITEM 9.A. 4co `" ,, Proposed Moorpark Desalter Project Description ‘9,_____.0„„8„, Ventura County Waterworks District No. 1 Ventura County Water Works District No. 1 (District) serves approximately 38,000 customers encompassing nearly 20,000 acres including the City of Moorpark (City) as well as the contiguous, unincorporated areas to the north and west of the City. Currently, between 80% and 85% of the estimated 12,400 acre-feet of water delivered to the District's customers consists of imported water; whereas, between 15% and 20% is supplied by local groundwater wells owned and operated by the District. The South Las Posas Groundwater Basin is a shallow aquifer that extends from the community of Somis to the Moorpark College. Salinity levels in the shallow groundwater aquifer have been increasing over the years, primarily due to ongoing point and non-point sources from urbanization and agricultural activities in the region. Surface waters from tertiary-treated wastewater from Simi Valley and the District, urban runoff; storm water runoff; agricultural return flows; and perennial flows from the Arroyo Las Posas, are the main source of recharge to the Basin. These surface waters recharge the East Las Posas Basin and the shallow aquifer. The shallow aquifer in the South Los Posas basin, approximately 200 feet deep with groundwater levels of roughly 50 feet below grade, currently overflows into the Pleasant Valley Basin causing salinity problems for the City of Camarillo. The Moorpark Desalter project would extract salty groundwater from the shallow aquifer at a newly-constructed wellfield and then treat the water at a state-of-the-art desalination (desalter) plant for the removal of salts, including TDS, boron, 504, and chloride. The end product would be a potable water that meets Title 22 domestic water quality standards, and would be distributed to both Ventura County Waterworks Districts Nos. 1 and 19 customers. The extraction of high-salinity groundwater would create underground storage, allow for higher quality surface water to recharge, and create a local water supply. September 2014 1fl:1414: Public Works Agency, waterendSan(ahorr„; Ventura CountyWaterworks District No. 1 Department ' Moorpark Desalter Project Update Presentation to the City of Moorpark Reddy Pakala Director,Water and Sanitation Department Public Works Agency September 17.2014 Purpose "ti RA:,,4)1 Why the Moorpark Desalter is Being Pursued by Ventura County Waterworks District(WWD) No. 1 R • Stabilize customers'water rates for Ventura County WWDs Nos. 1 and 19 Reduce dependence on imported water 3 Provide an emergency water supply and help drought-proof Improve the local economy and create jobs • Help the Calleguas Creek Watershed wastewater treatment plants to comply with salts TMDLs adopted by the Los Angeles Regional Water Quality Control Board in October 2007 Salts will be exported to the Pacific Ocean via the Calleguas Municipal Water District's (Calleguas)Salinity Management Pipeline Create underground storage within the South Las Posas Basin to capture more surface water for beneficial uses,improve groundwater quality,and increase local water supply q• Improve groundwater quality and help reduce migration of salts from the South Las Posas Basin to the East Las Posas Basin Consistent with Fox Canyon Groundwater Management Agency(GMA)Resolution 2003-03 - Ventura County Waterworks Dlatncl No.1 Sudo 2 1 Moorpark Desalter%Ventura County WWD No. 1 Service Area s y -,-,-6-Z,.. vc Waterworks - Ti District No.f Watereerks Olstlot No.to (An*in rwo'1 Service An / Area L7 / l Met Wed Ter Site/ PrMassE Proposal WelOieht 94te ' eksorpark Desalfr r ,...,.. .�, 1111 • dill 1111 . p\., Legend ° •'"' _�••-o. y a WStOtwofkl Dl9elp NO 1 Spnete Of ImIhIMCe BOlYleiry-79325 60 Oct05 • Moorpark WNMYhM I_ I WTIalw01115 Ot5klct No I egltloAy Treatment PION _$ 71 215175300.50 VonWra County Waterworks District No I Sher J Ventura County WWD No. 19 Service Area _ - ;__ _ i• ' �, � i - gIr J ; -_+� — , CLOS ANGELES ' •...,'—',...'"- t I1 1 ,Ire ., 1030 r 0 ,. """"-d3 tin— • . VMtera County Waterworks District No t Sme.I 2 Groundwater Basins within Fox' Canyon Groundwater Management Agency(GMA) • • • •.T.,:,,,-..,, ,,,, , . -r East East Las Posas ' •4.,, .- ,,.•,..,, - '._.,_--,it.i.rr:. .4, q -, Basin . . aair lia- ' ' .. 4,..-C .11ifF3*-j't-I'''''":4, ..''.. V..- Ilbt•‘‘ . . Proposed Moorpark . • ,. Desalter Project ., Oxnard Forebay Basin 41) CP MI *, - • , ' South Las Posas Basin zr, Santa Ross Basin 1 1 ,. Pacific •.k a Iiiriiiiii . cr4 Ocean --L" ,t t - _ Legend Oxnard Plain A easin 1,,,,....7 ,r• ' . ,,1991 FCGMA Boundary , „ %los Mar Balmy In.Jtio7 UNoi..the FCCM,%G Whfgai I Plan I equrr, S/00 5 Map of South Las Posas Basin v-L--, A -(Sh a Ho w A q uife r) . ., sh",thiliay Water Qualify Contra/ Rang , r Potexead MfaMaNd aldtifffiftler P. m..„,...,,, A 411S , . - ,„0„,,,,„„ 1 •—...,,,f1 ... re., P1 j -te - k , 1 < .)". W , e. ..„, NO , ...1•,-77 .; Arroyo I ds POSJ, I pr<„ T' ....I) • I..t 'ZA if , ...1 •'• - . Legena Shoe 6 F-1 South Las Posas Basin Ven:1,41-1,11Pry W vorwatk, /5515”'Am f F.. ..,:o....•,11.1.13ewnso,U wo a...WPC 0 2 500 A000 MOW 3 Fox Canyon Aquifer and Shallow Aquifer A A• 200 - -'fwonpAPSIProposed .- .. asrylvlootl eAxsprk Doestfor 000' wlar- Protect VI 3 ASR ASR / 771Sar1 b18402 4001 " shallow Aquifer Stn PadroiSauqua •— • FOX C / SI M4�Whr i .700' - >c..4" p4.i,1e, ✓e,cv Snaps Fm 1200' 2 Ventura County Wafon•or0s Dnfnct No.1 Preliminary Design Report • Estimated yield: 5,000 acre-feet per year • Membrane process considered: • Reverse osmosis—8-inch diameter • Reverse osmosis->8-inch diameter • Nanofiltration • Electrodialysis removal • Membrane process recommended: • 8-inch diameter low pressure brackish water reverse osmosis(RO) • Post treatment • pH stabilization with sodium hydroxide • Disinfection—chlorination system • Initial cost estimate:$50.0 million(wellfield and water treatment) ~fora Caunfy Walerworkl aline No, side 8 4 Field Testing • First pilot well tests: November 2012 • Geophysical tests: November 2013 • Additional pump tests: 2014 r • i IIs • • Vonfrrr,,(:runty WatorworMs Dlslr,cI No I Welllield Layout/Groundwater Pumping/Treated Water Quality Total Number of Wells: 22 Production Wells: 20 Depth of Wells: 200 feet to 250 feet(Shallow Aquifer) Maximum Pumping: 5,875 AF/yr(3,654 gpm) Maximum Treated Water: 5,000 AF/yr (4.46 MGD) (6.9 cfs) Treated Water Quality • Chloride: 50 mg/I • TDS: 400 mg/I "- Venture County Wlewor*•D,sIncI No.1 can iU 5 lin art, e �"` e e •• o oAPR. l Proposed 1-414 i Moorpark o O O 0 0 a- .'. Desalter Proposed x•, 0 0 0 0 W@I@leld • , I r IM _ • � L . --F r Y • Sallndy Management .TI� Pipeline - - "- -....i.- - — IL ‘, L_ ._.. --, - ,.. --„... s '�►��.+(y 11.A - ^-why`- V , , •� Ventura County Waterworks District Na.1 Moorpark Deealler Pilot Wells Protect Ventura County Waterworks Donna!No.1 3-Dimensional Groundwater Modeling Testing Operation of Project Groundwater Flow Model with Particle Tracking Using Groundwater Vistas Using U.S. Geological Survey's MODFLOW, Model Code - Model Construction Model Calibration r Project Modeling • Covers southern half of the • Period 1976—2006 • 30-year period East Las Posas Basin quarterly stress two wet/dry • 200 ft.x 200 ft grid spacing periods cycles • Six layers, includes Fox • CALIBRATED AGAINST Canyon, San Pedro, and MEASURED Shallow Aquifer GROUNDWATER ELEVATIONS and • Stream flow routing calculates STREAM GAUGES stream recharge and flow volumes Velours County Waterworks Drerncr No 1 .iii.. 6 • - IL...-.". —,ii,-.it' :::• '•': ;.". 'I • -:'1 iiii •Int 0 _ . ,• •. --ten r '"`� ps•.1114;71,...., ns= y ry A - _ i ti 1 ,t lk:',.....,','..:, �„_ .•.,,x ll. I Vrl ,. �°± nr : t,W,.o-.)'' tt YR.�_ oot ' fr+' ,,t''''''..... ?!- •-=. ,• - 6� r '�+ r s V r , ,,., rO011 4 ' 4 3e ' Travel Time,Proposed Well Field Layout .ms P T " t: Pumping from Layer 4 ' � � + ;# t us ..:--.:-.2'4,...,' t , .....1!"••-••/ y • t rrl ,. Particle Traces,Travel Time Yrs ,h, . � tt.st' Layer r4 . f bwdi,„ wsi d ItJtlrs td It. i, ... .. Valium County Waterworks District No.f .Slue 11 1-5 Location of Well Hydrographs1,_J • Desalter Wells V .4,1_,Moorpark WRF Basins I I East Las Posas I I South Las Posas I I West Las Posas Moo • rk I. I Pleasant Valley 8F1 ,-_ 12G2 • 7B2 •BF1 .,......,,.., -o- WNI INR0W.1U62)Shallow Aquifer)-lar Co.2 Scenario. / .n =� San Pedro Formation Well 0.5 Miles from Project wxl3N/leW./FS)San Pedro)-O...a..2 Scm.rios _,00t 01OOIOr. ,.(fwo,.r„ 7.v Effect on Surrounding 1- Shallow xShallow Wells .. from Project Pumping- mmottiltrrat..0110 Shcle 15 Venture County Waterworks&solar No.I .a..un of wx e,rq,.p. �— 3•1141.1.; Fox Canyon Aquifer Well 0.05 Mile from Project Well IN/1.1.781(fog an.on)-9ar Cr.x Scomotie. •�' .7'eagglirrgavt-Y F .� Jo Fox Canyon Aquifer ]" Well 3.2 Miles from Project 9=a (Near Souris) "O Wen 221/20Wlt1)Fox Conn)-Noe Car 2Scenarios voc Fox Canyon Well I 31 Miles from Project (Near Somis)— Ventura County Waterworks Distract No.1 Siuf" 8 Length of Arroyo - Dry Weather Conditions 7- iin, With Project- Moorpark. f Without Project AiLik 711.11111111V S Ventura County~enemies Dhmct No.1 Slide 17 Other Infrastructure • Connect to Ventura County WWD No. 1 water distribution system • Connect to Calleguas water distribution system for wheeling with a metering station • Treated water distributed to WWDs Nos. 1 and 19 customers (consistent with GMA export policy) • SMP discharge station • Calleguas Salinity Management Pipeline(SMP) Ventura County Waterworks°Winer No.1 Sloe'8 9 Salinity Management Pipeline 0 :mrPark Women Prase 71 Park t...Ca1ra1M Onasw � --- e—= —akwayw Pnav It e � dwYw ...—_.._.__ & • 1 Mamma Wall000rm AP1eu0unl TOO t N 1 f Sao PeosooliaioyWO01./.1,1 —J Jasetr. 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Ventura County Waterworks OIstno f No 1 Shoe 19 Stakeholder Presentations Name Date of Presentation WWD No. 1 (Moorpark)Citizens'Advisory Committee May 8,2014 WWD No. 19(Somis)Citizens'Advisory Committee May 15. 2014 Calleguas Municipal Water District(Calleguas)Purveyors June 2, 2014 Calleguas Board of Directors June 4.2014 Las Posas Users Group(LPUG) June 25.2014 County of Ventura staff July 10, 2014 F94(/Wing,Cgou9r ,w02r, Ar gement Agency July 23, 2014 City of Moorpark September 17, 2014 • Ventura County Board of Supervisors(WWD No. 1) de20 10 Next Steps Conduct additional field testing to confirm total number of wells 2014 Finalize 3-D model and prepare groundwater monitoring plan 2014 Financing plan—considering grants.bonds,and/or loans 2014 EIR preparation 2014/2015 Construction • Wellfield 2015/2016 • Design—bid—award • Five well increments • Stress test—gpm • Composite water quality for treatment design • Membrane treatment • Design-Build process • RFQ/RFP Operations Plan • Operate the Project to comply with the adopted Mitigation and monitoring plans Ventura County WaferweF*s Distnct No.t 11