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Applicable Water Quality Standards WATER QUALITY OBJECTIVES/WATER QUALITY CRITERIA <br /> To protect the designated beneficial uses,the Regional Water Board applies water quality <br /> BENEFICIAL USES objectives contained in the Basin Plan,the California Toxics Rule(CTR),and other sets of water <br /> quality criteria to the receiving water;the San Joaquin River,specifically,and the Delta in <br /> The Water Quality Control Plan for the Sacramento-San Joaquin River Basins(Basin Plan), general. The Regional Water Board uses these objectives and criteria to determine if the City's <br /> originally adopted by the Central Valley Regional Water Board in 1975 and amended regularly, discharge will cause or contribute to a violation of an applicable water quality standard. Table 2 <br /> contains descriptions of the legal,technical,and programmatic bases for water quality regulation presents the most conservative water quality criteria used to protect the most sensitive beneficial <br /> in the region. The Basin Plan describes the beneficial uses of major surface waters and their uses that apply to the San Joaquin River and Delta for select constituents. Constituents included <br /> tributaries and the corresponding water quality objectives put into effect to protect these in Table 2 are those for which the WQCF has adopted effluent limits,as well as dissolved <br /> beneficial uses. In addition to being subject to the provisions contained in the Basin Plan for the oxygen(DO),due to the Total Maximum Daily Load(TMDL)for DO in the Stockton Deep <br /> Sacramento-San Joaquin River Basins,the discharges from the WQCF occur within the legal Water Ship Channel(DWSC),and temperature(due to the narrative temperature limitations <br /> boundaries of the Sacramento-San Joaquin Delta(Delta)and are therefore subject to the water contained in the Thermal Plan that are applicable to WQCF effluent discharged to the San <br /> quality standards contained in the Water Quality Control Plan for the Sacramento-San Joaquin Joaquin River). Water quality objectives for toxic constituents come from the CTR,as <br /> Bay-Delta,as adopted by the State Water Board. promulgated by the U.S.EPA(40 CFR§131.38). The hardness-based objective for total cyanide <br /> Table 1 presents the existing beneficial uses for the Delta,the applicable water body for the listed in the CTR was calculated using a hardness value(172 mg/L)measured during the low fall <br /> planned WQCF discharge to the San Joaquin River. flows of October 2002 in the San Joaquin River at WQCF R-1;2002 is a water year classified as <br /> "dry"by the California Department of Water Resources. <br /> Table 1: Beneficial Uses Designated for the Sacramento-San Joaquin River Delta <br /> Table 2: Applicable Water Quality Objectives and/or Criteria for the San Joaquin River and <br /> Beneficial Uses for Surface Water Designated for Sacramento- Sacramento-San Joaquin Delta <br /> defined in the Basin Plan San Joaquin Delta <br /> Municipal and Domestic Supply(MUN) Yes Most Stringent Water <br /> Quality Objective or Criteria <br /> Agricultural Supply:Irrigation(AGR) Yes <br /> Agricultural Supply:Stock Watering(AGR) Yes Classification Constituent Value Unit Reference <br /> Industrial Process Supply(PROC) Yes Bacteriological Fecal Coliform 200/100 mL MPN Basin Plan <br /> Industrial Service Supply(IND) Yes Biochemical Oxygen N/A N/A NIA <br /> Industrial Power Supply(POW) No Demand(BOD) <br /> Water Contact Recreation: Chlorine Residual 0.011 mg/L Draft TRC Policy of CAP) <br /> Contact Recreation(REC 1) Yes Dissolved Oxygen 5 mg/L Basin Plan <br /> Water Contact Recreation: Electrical Conductivity 700 µmhos/cm Basin Plan <br /> Canoeing and Rafting(REC 1) No (April—August) <br /> Non-Contact Water Recreation(REC 2) Yes Electrical Conductivity 1000 µmhos/cm Basin Plan <br /> Warm Freshwater Habitat(WARM) Yes (September—March) <br /> Conventional Methylene Blue Active Title 22 MCL <br /> Cold Freshwater Habitat(COLD) Yes Substances(MBAS) 500 µg/L (secondary MCL)Izl <br /> Migration of Aquatic Organisms:Warm Water(MIGR) Yes Oil and Grease Narrative — Basin Plan <br /> Migration of Aquatic Organisms:Cold Water(MIGR) Yes pH 6.5<_pH<_8.5 std.units Basin Plan <br /> Fish Spawning,Warm Water(SPWN) Yes Settleable Solids Narrative Basin Plan <br /> Fish Spawning,Cold Water(SPWN) No Temperature Narrative °F Thermal Plan(3/ <br /> Wildlife Habitat(WILD) Yes Total Suspended Solids <br /> Navigation(NAV) Yes (TSS) Narrative Basin Plan <br /> Source:Water Quality Control Plan for the Sacramento River Basin and San Joaquin River Basin,Fourth Turbidity 20%Increase NTU Basin Plan <br /> Edition,Revised August 2006(CVRWQCB,2006b) <br /> City of Manteca Antidegradation Analysis 7 June 2007 City of Manteca Antidegradation Analysis $ June 2007 <br />