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San Joaquin County Community Environmental Setting,Impacts,and Mitigation Measures <br /> Development Department Surface Hydrology,Storrnwater,and Water Quality <br /> impaired(State Water Board 2003a). However, the canal is listed on a <br /> monitoring list as being potentially impaired for selenium(State Water Board <br /> _ 2003b). In addition,Mendota Pool,the end-point of the canal, is listed as <br /> impaired for selenium. The selenium is from agriculture,groundwater <br /> withdrawal, agricultural return flow,and other sources(State Water Board <br /> 2003a). <br /> Regulatory Setting <br /> Various federal,state,and local agencies have jurisdiction over the project area. <br /> Important agencies and statutory authorities relevant to hydrology and water <br /> quality as it relates to the proposed Project are outlined below. <br /> Federal Regulations <br /> Clean Water Act <br /> The federal CWA (33 U.S. Government Code [USC] 1251-1376),as amended <br /> by the Water Quality Act of 1987, is the major federal legislation governing <br /> water quality. The objective of the CWA is "to restore and maintain the <br /> +� chemical,physical,and biological integrity of the Nation's water." Important <br /> applicable sections of the CWA are as follows. <br /> r ■ Sections 303 and 304 provide water quality standards, criteria, and <br /> guidelines. <br /> ■ Section 401 requires an applicant for any federal permit that proposes an <br /> " activity that may result in a discharge to"waters of the United States"to <br /> obtain certification from the state that the discharge will comply with other <br /> provisions of the act. Certification is provided by the Regional Water <br /> Quality Control Board(RWQCB). <br /> ■ Section 402 establishes the National Pollutant Discharge Elimination System <br /> (NPDES),a permitting system for the discharge of any pollutant(except for <br /> dredged or fill material)into waters of the United States. This permit <br /> program is administered by the RWQCB and is discussed further below. <br /> State Regulations <br /> Porter-Cologne Water Quality Control Act <br /> The State of California's Porter-Cologne Water Quality Control Act(California <br /> Water Code Section 13000 et seq.)provides the basis for water quality regulation <br /> in California. The act requires a Report of Waste Discharge for any discharge of <br /> waste(liquid, solid, or otherwise)to land or surface waters that may impair a <br /> beneficial use of surface water or groundwater of the state. Beneficial uses are <br /> y discussed below. The RWQCB issues waste discharge requirements(WDRs) <br /> based on the report. <br /> ... DeSilva Gates Quarry Project <br /> Draft Environmental Impact Report 3.G-3 <br /> J85 05105.05 <br />