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Table 2: Applicable Water Quality Objectives and/or Criteria for the San Joaquin River and 303(D)LISTINGS Sacramento-San Joaquin Delta(Continued) Section 303(d)of the Clear Water Act requires States to develop lists of water bodies(or Most Stringent Water segments of water bodies)that will not attain water quality standards after implementation of Quality Objective or Criteria minimum required levels of treatment by point-source dischargers(i.e.,municipalities and Classification Constituent Value Unit Reference industries). Section 303(d)requires States to develop a TMDL for each of the listed pollutant U.S.EPA National and water body combinations for which there is impairment. A TMDL is the amount of loading Aluminum,Total 87 gg/L Recommended WQ that the water body can receive and still meet water quality standards for that pollutant. The Criterion(Chronic)(°) TMDL must include an allocation of allowable loadings for both point and non-point sources, Arsenic,Dissolved 10 µg/L Basin Plan,Table III-1 with consideration of background loadings and a margin of safety. NPDES permit limitations Copper,Dissolved 10 Ixg/L Basin Plan,Table III-1 for listed pollutants must be consistent with allocations identified in adopted TMDLs. Metal Cyanide,Total 5.2 P9/L California Toxics Rule The U.S.EPA partially approved California's 2006 303(d)list on November 20,2006. The U.S. (Freshwater,Chronic) EPA is still reviewing the State's proposed delisted and do not list waters,but this review does Iron,Dissolved 300 ftg/L Basin Plan,Table III-1 not affect the current antidegradation analysis. In contrast to the four Delta sub-regions included Manganese,Dissolved 50 µg/L Basin Plan,Table III-1 in the 2002 303(d)list,the 2006 303(d)list divides the Delta into eight sub-regions,each California Toxics Rule possessing a set of pollutants/stressors that have been identified as preventing the sub-region Mercury,Total 0.050 Itg/L (Human Health,Water& from meeting water quality standards. Of the eight new sub-regions contained in the Delta,six Organisms) are likely to receive a minor fraction of WQCF effluent over the course of any given water year U.S.EPA 1999 Update of depending on flow conditions and hydraulic operations of the Delta. These six sub-regions Ammonia as N 0.62 m9/L Ambient Water Quality include the Central Delta,Eastern Delta,Export Area,Southern Delta,Stockton Ship Channel, (June—September) Criteria for Ammonia and the Western Delta. Table 3 lists the constituents identified in the 2006 303(d)list for the six (30-day average)(') Delta sub-regions,and Table 4 presents potential sources and proposed TMDL completion dates U.S.EPA 1999 Update of for these listed constituents. Ammonia as N Ambient Water Quality Nutrient (October—May) 5.62 mg/L Criteria for Ammonia (1-hour average)(fil Table 3: 2006 Clean Water Act Section 303(d)Listed Constituents as they pertain to Sacramento- San Joaquin Delta Waterways Nitrate as N 10 m /L Title 22 MCL(Primary)/ 9 Basin Plan(2) Delta Waterways Nitrite as N 1mg/L Title 22 MCL(Primary)/ Central Eastern Export Southern Stockton Ship Western Basin Plan PollutantiStressor Portion Portion Area Portion Channel Portion California Toxics Rule Chlorpyrifos X X X 2,4,6-Trichlorophenol 2.1 pg/L (Human Health,Water& Organisms) DDT X X X X X X California Toxics Rule Diazinon X X X Bis 2-eth Ihex I hthalate 1.8 ( Y Y)P µg/L (Human Health,Water& Dioxin X(1) Organic Organisms) Electrical Conductivity X X X g California Toxics Rule Bromodichloromethane 0.56 Itg/L (Human Health,Water& Exotic Species X X X X X X Organisms) Furan Compounds XM California Toxics Rule Group A Pesticides X X X X X X Dibromochloromethane 0.41 Itg/L (Human Health,Water& Mercury X X X X X X Organisms) - (1)Draft Total Residual Chlorine and Chlorine-Produced Oxidants Policy of California,June 2006. Pathogens X(1t (2)Incorporated into the Basin Plan by reference(CVRWQCB,2006b). PCBs X(11 (3)California Thermal Plan(SWRCB,1972). Unknown Toxicity X X X X X X (4)Numeric criterion used to interpret narrative water quality objective. (5)Numeric criterion used to interpret narrative water quality objective based on a pH of 8.4 std.units and a temperature of 26°C; (1)This listing was previously under Stockton Turning Basin,upper(Port Turning Basin).In order to consolidate listings for same cited in NPDES No.CA0081558(CVRWQCB,2004). areas,all listings for Stockton Turning Basin on the 2002 303(d)list are now included under the Delta Waterways(Stockton Ship (6)Numeric criterion used to interpret narrative water quality objective based on a pH of 8 std.units;cited in NPDES No. Channel)sub-region. CA0081558(CVRWQCB,2004). City of Manteca Antidegradation Analysis 9 June 2007 City of Manteca Antidegradation Analysis 10 June 2007