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WASTE DISCHARGE REQUIREMENTS -4- <br />CALIFORNIA AMMONIA COMPANY <br />CALAMCO - STOCKTON TERMINAL <br />SAN JOAQUIN COUNTY <br />* Ammonia concentration in effluent due to ambient ammonia in water supply, not due <br />to any addition by Discharger <br />Storm water is discharged at two points (Gates A and B) into the Port's storm drain <br />system which discharges into a ditch along Washington Ave that eventually flows to the <br />San Joaquin River. A diagram of the discharge locations is shown in Attachment B, a part <br />of this Order. <br />The Discharger has developed and implemented a Storm Water Pollution Prevention Plan <br />(SWPPP) at the facility which lays out the facility's program for preventing storm water <br />runoff contamination from industrial activities occurring at the site. The facility will <br />continue to administer the SWPPP as an element of this permit. The requirements of the <br />SWPPP are set forth in Attachment C, a part of this Order. <br />The U.S. Environmental Protection Agency (EPA) and the Board have classified this <br />discharge as a minor discharge. <br />The State Water Resources Control Board (SVVRCB) adopted the Water Quality Control <br />Plan for the San Francisco Bay/Sacramento-San Joaquin Delta Estuary in May 1995 <br />(Bay/Delta Plan). The Bay/Delta Plan includes water quality objectives. This Order <br />implements the Bay/Delta Plan. <br />The Board adopted a Water Quality Control Plan, Third Edition, for the Sacramento River <br />Basin and San Joaquin River Basin (hereafter Basin Plan) which contains water quality <br />objectives for all waters of the Basins. These requirements implement the Basin Plan. <br />Federal regulations require effluent limitations for all pollutants that are or may be <br />discharged at a level that will cause or have the reasonable potential to cause, or <br />contribute to an in-stream excursion above a narrative or numerical water quality standard. <br />Based on information submitted as part of the application, in studies, and as directed by <br />monitoring and reporting programs the Board finds that the discharge does have a <br />reasonable potential to cause or contribute to an in-stream excursion above a water quality <br />objective for pH and ammonia. Effluent limitations for these constituents are included in <br />this Order. <br />The beneficial uses of the San Joaquin River downstream of the discharge are municipal <br />and domestic, industrial, and agricultural supply; water contact and noncontact recreation; <br />esthetic enjoyment; navigation; ground water recharge, fresh water replenishment;