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} 61e=�j`11 <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> ORDER NO. <br /> NPOES NO. CA0079138 <br /> WASTE DISCHARGE REQUIREMENTS <br /> FOR <br /> CITY OF STOCKTON MAIN WATER QUALITY CONTROL PLANT <br /> SAN JOAQUIN COUNTY <br /> The California Regional Water Quality Control Board, Central Valley Region, <br /> (hereafter Board) , finds that: <br /> 1. The City of Stockton Main Water Quality Control Plant ( hereafter Dis- <br /> charger) submitted a Report of Waste Discharge NPOES No. CA0079138, dated <br /> 31 January 1985. <br /> 2. The City of Stockton Main Water Quality Control Plant discharges an average <br /> of 29 mgd (1271 1/sec ) and a maximum of 67 mgd (2935 1/sec) of treated <br /> domestic and industrial waste from secondary treatment facilities and when <br /> needed, 58 mgd ( 2540 1/sec) of treated domestic and industrial waste from <br /> tertiary treatment facilities into the San Joaquin River, a water of the <br /> United States , at a point one mile (0.6 km) downstream from the Highway 4 <br /> Bridge, in the NW-1/4 of Section 17, T1N, R6E, MDB&M. <br /> 3. The Report of Waste Discharge describes the existing discharge as follows: <br /> Average flow: 29 mgd (1271 1/sec) <br /> Lowest monthly average flow: 22 mgd (964 1/sec) <br /> highest monthly average flow: 34 mgd (1489 1/sec) cannery season <br /> Average temperature: 79 °F (22 °C) Summer; 54 °F (13 °C) <br /> Winter <br /> Average BOD5: 6 mg/l <br /> Average total suspended solids: 15 mg/l <br /> Average settleable matter: <0.1 ml/l <br /> pH: 6. 1 lowest monthly average; <br /> 7.1 highest monthly average <br /> 4. Maximum waste flows occur during the summer and fall months, with the major <br /> volume contributed by the canneries connected to the city sewage system. <br /> Liquid cannery wastes also provide the major organic loading to the plant <br /> during this period. <br />