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Home My WebLink About97.PPP GWRS Admin Committee 09-09-15Kathy Millea Administration Committee September 9, 2015 Groundwater Replenishment System (GWRS) 162,000,000,000 gallons, and counting. Water Resource Recovery EffluentInfluent Preliminary Treatment Primary Treatment Secondary Treatment OCWD and OCSD Joint Campus OCSD OCWD Irvine Anaheim Irvine SanClemente Huntington Beach Anaheim Both serve roughly the same service area.~2.5 million residents OCWD Service Area OCSD Service Area Orange County Boundary OCSD and OCWD Service Areas Water Factory 21 Project (1970s) Green Acres Project (1991) Ground Water Replenishment System (2008/2015) 30-Year Partnership •Seawater intrusion barrier •2008 -70 MGD of potable water 2015 –100 MGD of potable water •Non-potable water for landscape irrigation (purple pipe) Groundwater = 72% of Potable Water for our Service Area Santa Ana River Baseflow - 33% Santa Ana River Stormflows - 17% GWRS -22% Incidental Recharge - 20% Imported Water -6% Other -1% Santa Ana River Baseflow -21% Santa Ana River Stormflows -13% GWRS -31% Incidental Recharge -16% Imported Water - 18% Other -1% Typical Year Next Year ►Largest water purification program of its kind in the world –100 MGD ►Takes treated sewer water that otherwise would be discharged to the ocean and purifies it to near-distilled quality ►Provides a new 100,000 acre-feet per year source of water, which is enough water for nearly 800,000 people ►½ the energy to pump imported water 1/3 the energy to desalinate ocean water What Is The Groundwater Replenishment System (GWRS)? GWRS Process GWRS Distribution System Irvine Huntington Beach Ocean Pipeline Outfall GWRS Anaheim SpreadingFacilities Groundwater Basin(OCWD Boundary) Santa Ana River N Pacific Ocean Santiago CreekFuture mid-basininjection OCSDTreatmentPlants SeawaterIntrusion Barrier • Kraemer Basin GWRS Water is Better Than State and Federal Drinking Water Standards GWRS Flow Capacity GWRS 2008 70 MGD 70 MGD100 MGD Initial Expansion 2015 Final Expansion ? 30 MGD 30 MGD 130 MGD 93 MGD 40 MGD 40 MGD GWRS is a joint project with joint governance GWRS Steering Committee OCSD 3 Members Beamish, Nielsen, Ferryman + 3 Alternates Kring, Sebourn, Jones OCWD 3 Members Yoh , Anthony, Green + 3 Alternates Bilodeau, Flory, Nguyen OCSD Contributions to GWRS Water •≈10 Acres Leased for $1/year Land •≈162,000,000,000 Gallons Since 2008 at no charge OCSD Contributions to GWRS Additional and Improved Treatment •GWRS Microfiltration Backwash Water Treatment •GWRS Reject Brine Disposal •Plant 1 Secondary Process Improvements •High Quality Water = GWRS 97% on-line factor Flow Management •Steve Anderson Lift Station •Diversions in the Collection System •Plant 1 Treats Higher Flows •Plant 2 Treats More Solids •Continuous Operational Coordination with OCWD OCSD Contributions to GWRS •Highly Effective Pretreatment Program •Pollutant Source Control Examples –Source Reduction of N-Nitrosodimethylamine (NDMA) and its Precursors –Source Investigation and Reduction of 1,4-Dioxane –SAWPA Remedial Plan •Public Outreach Programs –“No Drugs Down the Drain” –Co-hosting events, tables, presentations and tours –Joint media efforts 0 200 400 600 800 1000 1200 1400 1600 1800 2000 77 80 83 86 89 92 95 98 01 04 07 10 13 Total Effluent Heavy Metals TotalEffluentHeavyMetals MG D lb s / d ay Robust Source Control Program OCSD Direct Benefits •Reduced outfall flow = less pumping, less disinfection •No OCWD charge for first 1 MGD of non-potable water ($700k/year prior to 2009) •100 MGD emergency outfall flow capacity 100120140160180200220 240260280300 19 9 4 19 9 5 19 9 6 19 9 7 19 9 8 19 9 9 20 0 0 20 0 1 20 0 2 20 0 3 20 0 4 20 0 5 20 0 6 20 0 7 20 0 8 20 0 9 20 1 0 20 1 1 20 1 2 20 1 3 20 1 4 20 1 5 Treated Wastewater to Ocean MGD Groundwater Replenishment System (GWRS) in operation since 2008 Wastewater Recycled 2013 Strategic Plan On November 20, 2013, the Board approved the Five-year Strategic Plan which included the strategic goal for “Future Water Recycling”. 2013 Strategic Plan On November 20, 2013, the Board approved the Five-year Strategic Plan which included the strategic goal for “Future Water Recycling”. Effluent Reuse Study •Develop GWRS Final Expansion Implementation Plan •Identify future water recycling opportunities beyond GWRS •Pursue grant opportunities Effluent Reuse Study •Develop GWRS Final Expansion Implementation Plan •Identify future water recycling opportunities beyond GWRS •Pursue grant opportunities $450,000 WaterSMART Grant Challenge: Decreasing Flows Population 180 190 200 210 220 230 240 250 260 270 280 290 Ju l / 9 4 Ju l / 9 5 Ju l / 9 6 Ju l / 9 7 Ju l / 9 8 Ju l / 9 9 Ju l / 0 0 Ju l / 0 1 Ju l / 0 2 Ju l / 0 3 Ju l / 0 4 Ju l / 0 5 Ju l / 0 6 Ju l / 0 7 Ju l / 0 8 Ju l / 0 9 Ju l / 1 0 Ju l / 1 1 Ju l / 1 2 Ju l / 1 3 Ju l / 1 4 Fl o w ( M G D ) Orange County Sanitation District Plant No. 1 & Plant No. 2 Combined Influent Flow July 1994 -July 2015 Population Current Flow 185 MGD Challenge: Flow Equalization 0.00 20.00 40.00 60.00 80.00 100.00 120.00 140.00 160.00 180.00 MG D Hour Projected OCSD Flow and GWRS Feed OCSD Available Flow 130 MGD GWRS Feed Surplus Deficit Flow Equalization Tanks for GWRS Initial Expansion •Santa Ana Regional Interceptor (SARI) discharges •GWRS permit does not allow use of SARI –Stringfellow Superfund site –Truck discharges / collection stations •Effluent Reuse Study to evaluate: –diverting domestic flows out of SARI –separate SARI treatment at OCSD Challenge: Santa Ana River Interceptor (SARI) 2015 GWRS Advisory Panel Recycling Subcommittee Findings •Stringfellow does not preclude GWRS recycling •SAWPA’s collection stations introduces some risk •Next Step: Full GWRS Advisory Panel in November 2015 to discuss further GWRS Today •Running near 100% capacity •Projected to meet production goal of 103,000 acre feet/year Questions? Santa Ana River Interceptor (SARI) SARI Total Flow: 35 MGD Orange County Domestic Flows: 23 MGD Non-Reclaimable Flows •Non-Reclaimable Flows ≈ 41 MGD –SARI (34 MGD total ≈ 11 MGD-inland counties and 23 MGD-OC domestic) –Centrate (≈ 5 MGD) –DAFT Underflow (≈ 1.5 MGD) –OCWD Cleaning Waste (≈ 0.5 MGD) FLOW SUMMARY OCSD Influent 185 MGD Non-Reclaimable (SARI)-34 MGD Non-Reclaimable (Other )-7 MGD Available Flow 144 MGD Needed for GWRS 173 MGD Deficit 29 MGD 0 20 40 60 80 100 120 140 160 180 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 17 MG Surplus 15 MG Deficit Challenge: Equalize Flow to GWRS Hour million gallons OCSD Flow GWR target flow 130 MG Storage Tanks 0 25 50 75 100 125 150 175 200 225 250 Ja n ' 0 8 Ja n ' 0 9 Ja n ' 1 0 Ja n ' 1 1 Ja n ' 1 2 Ja n ' 1 3 Ja n ' 1 4 Ja n ' 1 5 mi l l i o n g a l l o n s / d a y More water to GWRS, less water to ocean outfall 235 119 GWRS Plant 1 Effluent to GWRS Plant 2 Effluent to Ocean through Outfall System GWRS Independent Advisory Panel Appointed by National Water Research Institute Leading experts in public health and environmental protection Review operations, monitoring and water quality Makes recommendations to OCWD and regulatory agencies to assure quality and reliability General Manager Work Plan “Work with OCWD to jointly study improvements needed to support GWRS Final Expansion. Determine partnerships, needs, strategies, benefits and costs associated with recycling any remainder flows from Plant No. 2 effluent water.” •Santa Ana Regional Interceptor (SARI) discharges to OCSD Plant No. 2. •SARI discharges are wastewater flows and waste brines •OCWD is not permitted to use SARI source water for GWRS by the RWQCB/DPH •The Effluent Reuse Study is evaluating alternatives to capture reclaimable domestic flows out of SARI to feed GWRS Final Expansion Challenges to GWRS -SARI