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California Regional Water Quality Control Board - <br /> Central Valley Region I <br /> Robert Schneider,Chair Gray Davis <br /> '.Vinston H.Hickoz Governor <br /> Secreran.for Sacramento Main Office <br /> Environmental Internet Address: http://www.swrcb.ca.gov/—rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> ATTACHMENT D <br /> 10 September 2001 <br /> REQUIREMENT TO SUBMIT MONITORING DATA <br /> The Regional Water Quality Control Board (Board) is required to protect and enhance the beneficial uses <br /> of surface and ground waters in the Region. As part of that effort,National Pollutant Discharge <br /> Elimination System (NPDES) Permits are adopted which prescribe effluent limits for the types and <br /> concentrations of chemical and physical constituents which can be safely discharged. In order to prepare <br /> appropriate NPDES Permits, it is necessary to have adequate characterization of the discharged effluent <br /> and the receiving wAter. <br /> The following is a requirement that you collect effluent and receiving water samples and have them <br /> analyzed for a variety of potential waste constituents. In most cases this monitoring will be in addition <br /> to monitoring required in your NPDES Permit. To the extent that there is overlap between this request <br /> and monitoring already being done under your Permit, the monitoring need not be duplicated. This <br /> requirement is brought on by a number of factors: <br /> 1. On 2 March 2000, the State Water Resources Control Board adopted the Policy far Implementation <br /> of Toxics Standards for Inland Surface Waters, Enclosed Bays, and Estuaries of California, also <br /> lmown as the State Implementation Policy(SIP). The SIP established methods of evaluating <br /> receiving water criteria and developing effluent limitation in NPDES Permits for the priority <br /> pollutants contained in the US Environmental Protection Agency's (USEPA) California Toxics Rule <br /> and portions of USEPA's National Toxics Rule. Section 1.2 of the 91P directs the Board to issue <br /> Water Code Section 13267 letters to all NPDES dischargers requiring submittal of data sufficient to <br /> (1) determine if priority pollutants require effluent limitations (Reasonable Potential Analysis) and <br /> (2) calculate water quality-based effluent limitations. Further, Section 2.4 of the SIP requires that <br /> each discharger submit to the Regional Boards reports necessary to determine compliance with <br /> effluent limitations for priority pollutants in permits. Sections 2.4.1 through 2.4.4 of the SIP provide <br /> minimum standards for analyses and reporting. (Copies of the SIP maybe obtained from the State <br /> Water Resources Control Board, or downloaded from http://www.swrcb.ca-go swp/final.pdf.) To <br /> implement the SIP, effluent and receiving water data are needed for all priority pollutants. Effluent <br /> and receiving water pH and hardness are required to evaluate the toxicity of certain priority <br /> pollutants (such a heavy metals) where the toxicity of the constituents varies with pH and/or <br /> hardness. Section 3 of the SIP prescribes mandatory monitoring of dioxin congeners. <br /> California Environmental Protection Agency <br />