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WASTE DISCHARGE REQUIREMENTS -5- CITY OF STOCKTON AUSTIN ROAD LANDFILL GROUND WATER TREATMENT SYSTEM AND STORMWATER DISCHARGE T SAN JOAQUIN COUNTY 30-Day Daily Constituents Units Median Maximum E Ethyl Benzene Ag/l <0.5 5* Toluene Ag/l <0.5 5* Xylene Ag/l <0.5 5* *The sum of the concentrations of volatile organics in any single sample shall not exceed 5 yg/l . N 2. The discharge shall not have a pH less than 6.5 nor greater than 8.5. 3. The average daily discharge flow shall not exceed 580,000 gallons. C. Solids Disposal : T 1. Collected screenings, sludges, and other solids removed from the treated ground water, or generated as the result of ground water treatment, shall be disposed of in a manner approved by the Executive Officer. D. Receiving Water Limitations: A Receiving water limitations are site-specific interpretations of water quality objectives from applicable water quality control plans. As such, they are a required part of this permit. However, a receiving water condition not in conformance with the limitation is not necessarily a violation of this Order. The Board may require an investigation to determine cause and culpability prior to asserting a violation has occurred. Neither the discharge from the ground water treatment plant or storm water runoff shall cause the following in the receiving water: 1. Concentrations of dissolved oxygen to fall below 5.0 mg/l . 2. Oils, greases, waxes, or other materials to form a visible film or coating on the water surface or on the stream bottom. 3. Oils, greases, waxes, floating material (liquids, solids, foams, and scums) or suspended material to create a nuisance or adversely affect beneficial uses. 4. Toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal , or aquatic life. 5. Acute toxicity in the receiving waters including the mixing zone.