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2025 URBAN WATER MANAGEMENT PLAN <br /> MAY 2026/FINAL DRAFT/CAROLLO <br /> OC San's ocean outfall is 120-inch diameter and extends four miles off the coast of Huntington Beach.A <br /> 78-inch diameter emergency outfall also exists that extends 1.3 miles off the coast. <br /> OC San Reclamation Plant No. 1 - Reclamation Plant No. 1 treats raw wastewater and has a maximum <br /> treatment capacity of 320 mgd. The plant provides primary and secondary treatment and supplies <br /> secondary effluent to OCWD for further tertiary treatment at their GAP facility and advanced treatment at <br /> their GWRS. Reclamation Plant No. 1 is the only plant that provides water to OCWD for additional <br /> treatment and recycling.An interplant pipeline allows flows to be conveyed to Treatment Plant No. 2. <br /> OC San Treatment Plant No. 2 - Treatment Plant No. 2 provides primary and secondary treatment to raw <br /> wastewater and has a maximum treatment capacity of 312 mgd. All secondary effluent from their plant is <br /> discharged to the ocean through the ocean outfall. <br /> 6.6.1.2 Orange County Water District <br /> OCWD is the manager of the OC Basin,which provides water to 19 municipal water agencies and special <br /> districts.A full description of the OC Basin is available in Section 6.3.1. OCWD and OC San have jointly <br /> constructed and expanded two water recycling projects that include: (1) OCWD GAP; and (2) OCWD <br /> GWRS. <br /> OCWD GAP <br /> OCWD owns and operates the GAP, a water recycling system that provides up to 8,400 AFY of recycled <br /> water for irrigation and industrial uses. GAP provides an alternate source of water that is mainly delivered <br /> to parks, golf courses, greenbelts, cemeteries, and nurseries in the cities of Costa Mesa, Fountain Valley, <br /> Newport Beach, and Santa Ana. Approximately 100 customer sites use GAP water, and current recycled <br /> water users include Mile Square Park and Golf Courses in Fountain Valley, Costa Mesa Country Club, <br /> Chroma Systems carpet dyeing, Kaiser Permanente, and Caltrans. <br /> OCWD GWRS <br /> OCWD's GWRS allows southern California to decrease its dependency on imported water and creates a <br /> local and reliable source of water. OCWD's GWRS purifies secondary treated wastewater from OC San to <br /> levels that meet and exceed all state and federal drinking water standards.The GWRS Phase 1 plant has <br /> been operational since January 2008 and uses a three-step advanced treatment process consisting of <br /> microfiltration, reverse osmosis, and ultraviolet light with hydrogen peroxide.A portion of the treated <br /> water is injected into the seawater barrier to prevent seawater intrusion into the groundwater basin.The <br /> other portion of the water is pumped to ponds where the water percolates into deep aquifers and <br /> becomes part of Orange County's water supply.The treatment process is described on OCWD's website. <br /> (OCWD, GWRS, 2020). <br /> The GWRS first began operating in 2008 producing 70 mgd and in 2015, it underwent a 30-mgd <br /> expansion.Approximately 39,200 AFY of the highly purified water is pumped into the injection wells and <br /> 72,900 AFY is pumped to the percolation ponds in the City of Anaheim where the water is naturally <br /> filtered through sand and gravel to deep aquifers of the groundwater basin. The OC Basin provides <br /> approximately 77 percent of the potable water supply for north and central Orange County.The design <br /> and construction of the first phase (78,500 AFY) of the GWRS project was jointly funded by OCWD and <br /> OC San; Phase 2 expansion (33,600 AFY)was funded solely by OCWD. <br /> CITY OF SANTA ANA <br />