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WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2003-0017 ✓ .w }'q VILLAGE WEST MARINA MAINTENANCE DREDGING PROJECT SAN JOAQUIN COUNTY 16. Solids analysis of representative sediment samples indicate that the dredge material is suitable for unrestricted beneficial reuse in the upland environment, and will not pose a threat to human health nor the ecosystem. The material should not be reused where substantial amounts of dredge material could runoff into the waterways, as the high levels of solid-phase TBT may pose a threat to benthic organisms in the aquatic environment. 17. The Board adopted a Water Quality Control Plan, Fourth Edition, for the Sacramento River Basin and the San Joaquin River Basin(hereafter Basin Plan), containing beneficial uses,water quality objectives, and implementation programs for waters of the Basin. These requirements implement the Basin Plan. 18. The beneficial uses of the Sacramento-San Joaquin Delta as identified in Table H-1 of the Basin Plan are: municipal and domestic supply, agricultural uses, industrial process supply, industrial service supply, body contact and other non- body contact recreation, warm and cold freshwater aquatic habitat, warm and cold water fish migration habitat,warm water spawning habitat,wildlife habitat, and navigation. 19. The beneficial uses of the ground water are: municipal and domestic supply, agricultural supply, industrial process supply, and industrial service supply. 20. The U.S. EPA adopted the California Toxics Rule (CTR) on 18 May 2000, which together with the U.S. EPA National Toxics Rule (NTR),provide enforceable . numeric water quality criteria for priority toxic pollutants. The Policy for Implementation of Toxics Standards for Inland Surface Waters, Enclosed Bays, and Estuaries of California, hereafter referred to as the State Implementation Plan, was adopted in March 2000 by the State Water Board. It provides implementation requirements for the CTR and NTR criteria and was followed as appropriate in the development of this permit. CTR and NTR standards may be incorporated in this Order to implement the narrative objectives of the Basin Plan. 21. The Discharger submitted information about the probable constituents of concern and their anticipated concentrations in the dredged material, effluent, and receiving water. The Board finds that the effluent discharges are not likely to cause or contribute to a violation of applicable water quality objectives and CTR/NTR criteria. 22. Dredging operations may cause some degradation to the waters of the State. Dredging operations cause only temporary impacts to surface waters, as dredging and effluent discharge occur only a few weeks out of the year. Since the effluent contains only water and sediment that originated in the water body,it does not constitute a new source of pollutants. However, dredging may cause temporary degradation of turbidity,total suspended solids, dissolved oxygen and elevated levels of some constituents. The dredging project covered under this Order will not exceed any applicable water quality objectives. Maintenance dredging of the