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Policy for Implementation of Toxics Standards for Inland Surface Waters, Enclosed Bays, and Estuaries of California The Policy for Implementation of Toxics Standards for Inland Surface Waters, Enclosed Bays, and Estuaries of California (also referred to as the Statewide Implementation Plan, or SIP) (SWRCB 2000)applies to discharges of toxic pollutants into inland surface waters, enclosed bays, and estuaries. The policy describes methods for setting effluent limits in NPDES permits from NTR and CTR standards and priority pollutant objectives established in Basin Plans using one of several methods,including: (1)TMDL waste load allocation procedures; (2) steady-state modeling; and(3) dynamic modeling. The policy also establishes certain monitoring requirements and chronic toxicity control provisions, and includes special provisions for certain types of discharges. SWCRB Resolution No. 68-16 (Statement of Policy with Respect to Maintaining High Quality Waters in California) The goal of State Water Board Resolution No. 68-16 ("Statement of Policy With Respect to Maintaining High Quality Waters in California")is to maintain high quality waters where they exist in the State. State Board Resolution No. 68-16 states, in part: 1. Whenever the existing quality of water is better than the quality established in policies as of the date on which such policies become effective, such existing high quality will be maintained until it has been demonstrated to the State that any change will be consistent with maximum benefit to the people of the State,will not unreasonably affect present and anticipated beneficial use of such water and will not result in water quality less than that prescribed in the policies. 2. Any activity which produces or may produce a waste or increased volume or concentration of waste and which discharges or proposes to discharge to existing high quality waters will be required to meet waste discharge requirements which will result in the best practicable treatment or control of the discharge necessary to assure that(a)pollution or a nuisance will not occur and(b)the highest water quality consistent with maximum benefit to the people of the State will be maintained. The SWRCB has interpreted Resolution No. 68-16 to incorporate the federal antidegradation policy,which is applicable if a discharge that began after November 28, 1975 will lower existing surface water quality(RWQCB 1998). Water Reclamation Regulations Wastewater reclamation in California is regulated under Title 22,Division 4, of the California Code of Regulations. The intent of these regulations is to ensure protection of public health associated with the use of reclaimed water. The regulations establish acceptable levels of constituents in reclaimed water for a range of uses and prescribe means for assurance of reliability in the production of reclaimed water. DHS has jurisdiction over the distribution of reclaimed wastewater and the enforcement of Title 22 regulations. The RWQCBs are responsible for issuing waste discharge requirements (including discharge prohibitions,monitoring, and reporting programs). The Manteca WQCF is currently permitted to reclaim up to 5 mgd of wastewater under Waste Discharge Requirements Order No. 97-146, adopted June 20, 1997 (RWQCB 1997). NPDES Permits and WDRs The SWRCB and Central Valley RWQCB have adopted specific NPDES permits for a variety of activities that have potential to discharge wastes to waters of the state. The SWRCB's statewide stormwater permit for general construction activity(Order 99-08-DWQ, as amended) is applicable to all land-disturbing construction activities that would disturb more than one acre. The SWRCB has also issued a general NPDES stormwater permit for industrial discharges(General Industrial Permit). EDAW DER Hydrology and Water Quality 4.9-20 City of Manteca