SITE INFORMATION AND CORRESPONDENCE_1985-2004

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r REVISED WASTE DISCHARGE REQUIREMENTS ORDER NO. 97-115 8 CITY OF MANTECA AND CITY OF LATHROP WASTEWATER QUALITY CONTROL FACILITY SAN JOAQUIN COUNTY 4. Wastes discharged to land shall not cause degradation of any waters of the state. 5. At all times, the discharge shall be kept within the designated disposal area, shown on Attachment A. The City may acquire additional areas for land disposal in the future. As these areas become available for disposal they will be added to the designated disposal area. C. Effluent Limitations (Discharge to the San Joaquin River) 1. The discharge of an effluent containing constituents in excess of the following limits is prohibited: 30-Day 7-Day 30-Day Daily Constituents Units Average Average Median Maximum BOD' mg/1 20 30 ---- 50 Total Suspended mg/l 20 30 ---- 50 Matter Settleable Matter ml/1 0.1 ---- ---- 0.2 Chlorine Residual mg/l ---- ---- ---- 0.1 Total Coliform MPN/100 ml ---- ---- 23 500 Organisms Oil & Grease mg/1 10 15 Ammonia2 mg N/1 31 Ammonia3 mg N/1 35 1 5-day,20°C biochemical oxygen demand(BOD) 2 From 1 June through 30 September 3 From 1 October through 31 May 2. The arithmetic mean of biochemical oxygen demand(5-day) and suspended solids in effluent samples collected in a period of 30 consecutive days shall not exceed 15 percent of the arithmetic mean of the values for influent samples collected at approximately the same times during the same period (85 percent removal). 3. The discharge shall not have a pH less than 6.5 nor greater than 8.5. 4. The Discharger shall use the best practicable cost-effective control technique currently available to limit mineralization to no more than a reasonable increment. The Discharger shall comply with this limitation by(1) submitting a mineralization plan for approval and (2) implementing the approved plan.