SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

j CALIFORNIA. REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. 83-001 NPDES NO. CA0004006 WASTE DISCHARGE REQUIREMENTS FOR SIMPSON PAPER COMPANY, RIPON MILL SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region (here- after Board) , finds that: 1 . The Simpson Paper Company, Ripon Mill (hereafter Discharger) submitted a report of waste discharge, dated 29 June 1982, to discharge waste under the National Pollutant Discharge Elimination System. 2. The Discharger proposes to intermittently discharge a maximum of 0.5 mgd (21.9 1/sec) of industrial wastewater from secondary treatment facilities at the mill into the Stanislaus River a water of the United States, at a point. in the southwest 1/4 of Section 29, T2S, R8E, MDB&M. The Discharger also discharges a maximum 1.8 mgd (78.9 1/sec) of combined industrial wastewater and stormwater runoff from both primary and secondary treatments to 90 acres (36.5 ha) of company owned land for disposal and irrigation. Domestic, waste is sewered to the City of Ripon wastewater treatment facilities. 3. The Simpson Paper Company, Ripon Mill is an existing nonintegrated paper mill which manufactures several grades of fine papers from purchased pulp. The mill ' s maximum daily production rate is 187,000 lbs (84,898 kgs) of paper. 4. The report of waste discharge describes the proposed discharge to the Stanis- laus River as follows: Maximum Flow: 0.5 million gallons per day (mgd) (21.9 1/sec) Average Temperature: 74°F (23.3 C) Summer; 55°F ( 12.8 C) Winter Daily Constituent Units Average Maximum Minimum BOD mg/l 45 60 25 Total Suspended mg/l 45 60 20 Matter Settleable Matter ml/l <0.1 0.1 -- pH 8.5 6.5 5. EPA and the Regional Board have classified this discharge as a major dis- charge.