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HomeMy WebLinkAbout97.Item 8 PPP Storm Update - Administration Committee 02-08-17Orange County Sanitation District OCSD High Flows During Rain Storms Ed TorresDirector of Operations and Maintenance Orange County PacificOcean Ocean Pipeline ReclamationPlant No. 1 TreatmentPlant No. 2 NewportBeach FountainValley Santa Ana Los Alamitos Buena Park Fullerton Tustin Garden Grove La Habra Brea Placentia Yorba Linda AnaheimAnaheim Orange La Palma Cypress Westminster Irvine Stanton VillaPark CostaMesa HuntingtonBeach SealBeach OCSD Service Area 396 miles of sewers 471 square miles 185 million gallons per day 2.6 million population 20 cities, 4 special districts 15 pumping stations 2 treatment plants OCSD Mission To protect public health and the environment by providing effective wastewater collection, treatment, and recycling. Wastewater Collection System City Local SewerManhole PrivateLateral OCSDRegional Trunkline OceanOutfallOCSDTreatmentPlants Manhole High Flow Color Code System Preparation Phase: When one-inch of rainfall is forecasted within three days or the upcoming weekend. Threat Phase: When there is 125 million gallons a day (MGD) over normal flow or 30 MGD over outfall flow; partial Incident Command System (ICS) activated. Storage Phase: Fill empty process storage tanks. Full ICS activated. Exceeding Capacity Phase: Evaluate use of backup outfalls, prepare for potential spills in the collections system. Recovery Phase: Drain and clean process units in preparation for next storm. Rain Event: January 18-22 RAINFALL •Plant No. 1 in Fountain Valley—4.8 inches of rainfall •Plant No. 2 in Huntington Beach—7.5 inches of rainfall •Total—12.3 inches of rainfall INFLUENT •Plant No. 1 in Fountain Valley—273 MGD (Design 320 MGD) •Plant No. 2 in Huntington Beach—313 MGD (Design 340 MGD) •Total—586 MGD of influent (Design 660 MGD) •Historic High Influent 550 MGD (January 1995)* Rain Event: January 18-22 EFFLUENT •503 MGD (Combined Plant 1 and 2) •Primary Outfall Design –480 MGD •Emergency Outfall Design –240 MGD •Total Outfall Design Capacity –720 MGD •Historic High Effluent 550 MGD (January 1995)* STAFF •Forty-three OCSD staff participated in preparing and responding to this storm event. INVESTMENT IN THE SYSTEM •The Groundwater Replenishment System (GWRS) treated peaks of 144 MGD. Be SocialConnect with Us! Please visit our website www.ocsd.com @ocsewers