Regional Approach to Maximize Reuse Opportunities in North San Diego County

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Regional Approach to Maximize Reuse Opportunities in North San Diego County October 19, 2011 ACWA Region 8, 9, 10 Mitch Dion Rincon del Diablo Municipal Water District

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Regional Approach to Maximize Reuse Opportunities in North San Diego County. Mitch Dion Rincon del Diablo Municipal Water District. October 19, 2011 ACWA Region 8, 9, 10. Overview of Presentation. Participating Agencies Goals of the Project Available Recycled Water Supplies - PowerPoint PPT Presentation

Transcript of Regional Approach to Maximize Reuse Opportunities in North San Diego County

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Regional Approach to Maximize Reuse Opportunities in North San Diego County

October 19, 2011ACWA Region 8, 9, 10Mitch DionRincon del Diablo Municipal Water District1Overview of PresentationParticipating AgenciesGoals of the ProjectAvailable Recycled Water SuppliesPotential Recycled Water DemandsLong-Term (2030) Regional OptionsShort-Term (2020) ProjectsRecommendations/Next Steps2Understanding San Diego WaterCheap and Easy are all Sold OutDiversification Is In3

San Diego County Water Authority4

VistaEscondidoOceansideSan MarcosSolano BeachEncinitasCarlsbad

Study Area / Location MapSan Diego County5Participating North County AgenciesWATER AGENCIESWASTEWATER AGENCIESCarlsbad Municipal Water District (City)City of CarlsbadCity of EscondidoCity of EscondidoCity of OceansideCity of OceansideVallecitos Water DistrictVallecitos Water DistrictSan Dieguito Water District (City)City of EncinitasVista Irrigation DistrictBuena Sanitation District (City of Vista)Olivenhain Municipal Water DistrictLeucadia Wastewater DistrictSanta Fe Irrigation DistrictSan Elijo Joint Powers AuthorityRincon del Diablo Municipal Water DistrictCamp Pendleton (Pending)6Wastewater Agencies (7)

7Water Agencies (8)

8Project GoalsInvestigate opportunities for expanded use of Recycled WaterInvolve multiple agencies from North CountyDocument effort in Facility Plan Report to use for pursuit of local, State, and Federal funding opportunities9Scope of Planning StudyCompare supplies with projected demandsConsider regulatory requirementsDevelop regional concepts to expand use of RWUtilize existing systemsSeasonal StorageGroundwater IPRReservoir Augmentation IPRPrepare Recycled Water Facility PlanLong-Term (2030)Short-Term (2020)

10Regulatory Considerations

Hydrologic Units/SubunitsTDS Limits 11Current Recycled Water SettingAvailable Recycled Water SuppliesPotential Non-Potable Water DemandsExisting Recycled Water Systems Planned Recycled Water Systems

12Projected Wastewater FlowAgencyWWTPWastewater Flow (MGD)2010202020301.Joint PowersEncina WPCF25.034.040.02.EscondidoHale Ave RRF13.021.025.03.OceansideLa Salina WWTP3.03.03.04.OceansideSan Luis Rey WWTP9.79.712.55.Joint PowersSan Elijo WRF3.13.13.16.VallecitosMeadowlark WRF3.74.54.57.Rincon Harmony Grove WRP--0.20.28.Buena SanShadowridge WRP--2.02.0TOTAL (MGD)57.577.590.3TOTAL (AFY)64,40086,800101,10013Planned Recycled Water ProductionAgencyTreatment PlantTertiary Capacity (MGD)2010202020301.CarlsbadCarlsbad WRP4.09.012.02.LeucadiaGafner WRP1.02.03.73.EscondidoHale Ave RRF9.018.020.04.VallecitosMeadowlark WRF5.05.05.05.JPASan Elijo WRF2.53.03.06.OceansideSan Luis Rey WWTP0.73.27.57.RinconHarmony Grove WRP--0.20.28.Buena SanShadowridge WRP--2.02.0TOTAL TERTIARY CAPACITY (MGD)22.242.253.4TOTAL TERITARY CAPACITY (AFY)24,90047,30059,800TOTAL WASTEWATER FLOW (AFY)64,40086,800101,10014AgencyAverage Annual Recycled Water Demand (afy)TotalCarlsbad MWD4,937City of Escondido771City of Oceanside119Olivenhain MWD1,000Rincon Del Diablo MWD3,279San Dieguito Water District700Santa Fe Irrigation District510Vallecitos Water District--Vista Irrigation District--Total11,316 (18%)Wastewater Flow64,400Existing Recycled Water Use15

Existing Recycled Water SystemsBuild on Current Efforts16

PlannedRecycled Water SystemsBuild on Current Efforts17Potential Recycled Water DemandAgencyAverage Annual Demand (afy)ExistingAdditional Short-TermTotal by 2020 *Additional Long-TermTotal by 2030 *Carlsbad MWD4,9373,0407,9777608,737City of Escondido7713,2504,0218,000 *12,021City of Oceanside1191,5801,6992,0573,756Olivenhain MWD1,0006001,600--1,600Rincon Del Diablo MWD*3,2794,000 *7,2792,000 *9,279San Dieguito Water District700--700--700Santa Fe Irrigation District5108001,310--1,310Vallecitos Water District--1.4441,4449222,366Vista Irrigation District--1,8401,8401,2103,050Totals11,316 (18%)14,55427,870 (32%)14,94942,819 (42%)Wastewater Flow64,40086,800101,100* Includes Indirect Potable Reuse demand18Regional Long Term (2030) OptionsOption A: Decentralized Supply Use satellite WPRsOption B: Centralized SupplyUtilize central/larger WWTP/WPRsOption C: Seasonal Storage7 potential sites identifiedOption D: Indirect Potable Reuse (IPR)GroundwaterSurface Water Augmentation

19Option A: Decentralized Supply Matching with demand AgencyAdditional Recycled Water Demand (afy)Avg. Annual Recycled Water Supply (afy)San Luis ReyShadowridgeCarlsbadHARRFGafnerMeadowlarkSan ElijoHarmony GroveCommunity SDCarlsbad3,8002,800600400Escondido11,30011,300Oceanside3,6003,000600Olivenhain600200100300Rincon6,0005,800200Santa Fe800500300Vallecitos 2,4001,500900Vista3,1007001,2001,100TOTAL31,6003,7001,2004,50018,6008001,30060020060020Option B: Centralized Supply Matching with demand AgencyAdditional Recycled Water Demand (afy)Avg. Annual Recycled Water Supply (afy)San Luis ReyShadowridgeCarlsbadHARRFGafnerMeadowlarkSan ElijoHarmony GroveCommunity SDCarlsbad3,8003,800Escondido11,30011,300Oceanside3,6003,600Olivenhain600500100Rincon6,0005,800200Santa Fe800800Vallecitos 2,4002,400Vista3,1007002,400TOTAL31,6003,70006,70019,50000900200021Decentralized versus Centralized - Selection CriteriaMaximize ReuseSystem Reliability AdaptabilityInstitutional ComplexityProximity of Supplies and Demands22

Decentralized versus Centralized - Evaluation ResultsoOption A: Decentralized Preferred23Regional Long Term Option A: Decentralized Approach

24Long Term (2030) Option A CostsITEMUNITSRegional Capital Costs$ 598,000,000Regional O&M Costs$ 9,485,000 / yearAdditional Recycled Water Use31,500 AFYRegional Unit Costs$1,270 / AFY25Figure 4-5Seasonal Non-Potable Recycled Water Demand Balanced with Wastewater Supply

Option C - Seasonal Storage26Potential Surface Storage SitesSiteEst. CapacityNotesWhalen Lake500 afCould be environmentally sensitiveWindmill Lake500 afPortion within Camp PendletonGuajome Lake500 afCurrently used for flood controlNorth Broadway2,200 afDistant from region, owned by CountyCalavera Lake500 afCurrently used for flood controlSquires Reservoir1,100 afOwned by Carlsbad, previously studiedSouth Lake500 afOwned by Vallecitos, previously studiedLake San MarcosUnknownWQ issues, limited water level changeBox CanyonUnknownLittle known about siteSan Dieguito Reservoir850 afCurrently used for potable water storage27

North Broadway(2,200 af)South Lake(500 af)Option A with Seasonal Storage SitesSquires Reservoir(1,100 af)28Option D: Indirect Potable ReuseSiteTypeEst. CapacityNotesMission BasinGroundwater10,000 afHigh TDS, existing desalterDaily RanchSurface17,000 afPot. Environmentally sensitiveLake WohlfordSurface7,000 afLimited retention timeLake DixonSurface2,600 afLimited retention timeSan Marcos BasinGroundwater4,600 afHigh TDS and nitratesHarmony GroveGroundwater4,000 afHigh nitratesSan Dieguito BasinGroundwater4,500 afHigh TDS29

Mission Basin(10,000 af)San Dieguito Basin(4,500 af)San Marcos Basin(4,600 af)Lake Wohlford(7,000 af)Option A with Indirect Potable ReuseSites30

Option A with Seasonal Storage and IPR SitesMission Basin(10,000 af)North Broadway(2,200 af)San Dieguito Basin(4,500 af)San Marcos Basin(4,600 af)South Lake(500 af)Squires Reservoir(1,100 af)Lake Wohlford(7,000 af)31Short Term (2020) Projects Matching with demand AgencyAdditional Recycled Water Demand (afy)Avg. Annual Recycled Water Supply (afy)San Luis ReyShadowridgeCarlsbadHARRFGafnerMeadowlarkSan ElijoHarmony GroveCommunity SDCarlsbad3,0002,800200Escondido3,3003,300Oceanside1,6001,000600Olivenhain600200100300Rincon4,0003,800200Santa Fe800500300Vallecitos 1,400600800Vista1,8007001,100TOTAL16,5001,0007004,5007,700400800600200600 Long Term (2030)31,6003,7001,2004,50018,6008001,30060020060032

Short-Term (2020) Projects 33Short Term (2020) Project CostsITEMUNITSRegional Capital Costs$ 336,000,000Regional O&M Costs$ 4,260,000 / yearAdditional Recycled Water Use16,500 AFYRegional Unit Costs$1,290 / AFY34RecommendationsAdditional study on seasonal storage sitesAdditional study on IPR sitesAgencies to update individual planning for consistency with regional planHydraulic analysis of regional systemDevelop or refine existing inter-agency agreementsConsider programmatic type environmental document for regional project

35Current StatusApproved for $1.5 million to be included in San Diego regional grant application to StateAgencies began Federal lobbying funding effortsCurrently updating Regional Approach to include Camp Pendleton

36Table4-6Long-Term Option Evaluation Criteria

CriteriaOption AOption B

Maximize Reuse

System Reliability

Adaptability

Institutional Complexity

Proximity of Supplies and Demands

Legend: = Meets criteria = Partially meets criteria = Does not meet criteria


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