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Water Quality Control Plan for Control of Temperatures in Coastal and Interstate Waters and <br /> Enclosed Bays and Estuaries of California (Thermal Plan) <br /> The SWRCB (1988)Water Quality Control Plan for Control of Temperatures in Coastal and Interstate Waters and <br /> Enclosed Bays and Estuaries of California(Thermal Plan) contains temperature objectives applicable to the <br /> proposed project. These objectives(Section 5.A) state that discharge shall not: <br /> a. exceed the receiving water temperature by more than 20°F; <br /> b. create a zone, defined by water temperatures of more than 1°F above natural receiving water temperature <br /> which exceeds 25%of the cross sectional area of the River at any point; and, <br /> c. cause a temperature rise greater than 4°F above the natural temperature of the receiving waters at any time or <br /> place. <br /> Pursuant to General Water Quality Provision 4 of the Thermal Plan,the City of Manteca is pursuing a limited <br /> exception to specific Thermal Plan water quality objectives for the current permitted discharge rate of 9.87 MGD <br /> (LWA 2006). <br /> Water Quality Control Plan for the San Francisco Bay/Sacramento-San Joaquin Delta Estuary <br /> The Water Quality Control Plan for the San Francisco Bay/Sacramento-San Joaquin Delta Estuary(Bay-Delta <br /> WQCP)(SWRCB 1995) establishes water quality control measures that will contribute to the protection of <br /> beneficial uses in the Bay-Delta.Among others,this plan establishes objectives for salinity,Delta outflow, export <br /> limits, and the Delta cross channel gates. <br /> These objectives are provided for the protection of following beneficial uses: estuarine habitat, coldwater habitat, <br /> warmwater habitat,migration of aquatic organisms, spawning,reproduction, and/or early development of aquatic <br /> organisms,wildlife habitat, and rare,threatened, or endangered species. These objectives also provide protection <br /> for the beneficial uses of shellfish harvesting, commercial and sport fishing, and navigation. <br /> NPDES Permit for the Manteca WQCF <br /> On March 19,2004,the RWQCB adopted Order No. R5-2004-0028 (NPDES No. CA0081558),which contains <br /> waste discharge requirements for the Manteca WQCF. In the Order,the RWQCB found that the discharge from <br /> the WQCF was unable to consistently comply with final effluent limitations for several constituents including <br /> receiving water limitations for temperature. Therefore, at the time of adoption of the Order,the RWQCB also <br /> issued Cease and Desist Order No. R5-2004-0029 (CDO),pursuant to California Water Code Section 13301. The <br /> CDO includes requirements and time schedules to bring the discharge into full compliance with the final effluent <br /> and receiving water limitations. On July 25, 2005 the City provided updated schedules for meeting the <br /> compliance time schedules required in the Order and CDO. One of the updated schedules was for compliance <br /> with the time schedule to meet the final effluent limitations for temperature contained in the CDO. A Thermal <br /> Plan Exception Report was developed and submitted February of 2007 and full compliance is expected by <br /> February 2009. <br /> The following are excerpts of the relevant receiving water limitations contained in the Order for the protection of <br /> aquatic resources: <br /> Limitation#1—Dissolved Oxygen. The discharge shall not cause dissolved oxygen concentrations in the San <br /> Joaquin River to fall below 5.0 mg/1. <br /> Limitation#6—Turbidity.The discharge shall not cause an increase of the monthly average turbidity to exceed <br /> the following: <br /> Manteca WQCF and Collection System Master Plans EIR EDAW <br /> City of Manteca 4.13-13 Fisheries and Aquatic Resources <br />