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WASTE DISCHARGE REQUIREMENTS -3- <br /> SIMPSON PAPER COMPANY, RIPON MILL <br /> SAN JOAQUIN COUNTY <br /> 30-Day Annual Daily <br /> Constituents Units Average Average Maximum <br /> BOD O) mg/1 45 60 <br /> lbs/day* 188 106 250 <br /> kg/day* 85 48 113 <br /> Total Suspended mg/l 45 60 <br /> Matter lbs/day* 188 106 250 <br /> kg/day* 85 48 113 <br /> Settleable Matter ml/l - - - - 0.1 <br /> Chlorine Residual mg/1 0.05 - - 0.1 <br /> (1) 5-day, 20°C Biochemical Oxygen Demand <br /> * Based upon a discharge rate of 0.5 mgd (21.9 1/sec) <br /> 2. The discharge shall not have a pH less than 6.5 nor greater than 8.5. <br /> 3. The 30-day average daily discharge shall not exceed 0.5 million gallons <br /> (21.9 1/sec) . <br /> 4. By-pass or overflow of untreated or partially treated waste is prohibited . <br /> 5. The Discharger shall use the best practicable cost-effective control <br /> technique currently available to limit mineralization to no more than a <br /> reasonable increment. <br /> 6. Survival of test fishes in 96-hour bioassays of undiluted waste shall be <br /> no less than: <br /> Minimum, any one bioassay - - - - - - - - - - - - - - - 70% <br /> Median, any three of more consecutive bioassays - - - - 90% <br /> Discharge 002: Discharge to Land <br /> 1. The discharge shall not cause degradation of any water supply. <br /> 2. Runoff from disposal areas and lands irrigated with wastewater shall be <br /> contained so as to prevent discharge into surface waters. <br /> B. Sludge Disposal : <br /> 1. Collected screening, sludges, and other solids removed from liquid wastes <br /> shall be disposed of in a manner approved by .the Executive Officer . <br /> 2. The discharge of sewage sludges into surface waters or surface water <br /> drainage courses is prohibited . <br />