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WASTE DISCHARGE REQUIREMENTS <br />GENERAL ORDER FOR DISCHARGE OF <br />GROUND WATER FROM CLEANUP OF <br />PETROLEUM FUEL POLLUTION <br />TO SURFACE WATERS <br />-6- <br />Creation of pollution, contamination, or nuisance, as defined by <br />Section 13050 of the California Water Code, is prohibited. <br />A discharge in excess of 100,000 gpd is prohibited. <br />C. Effluent Limitations <br />1. The discharge of an effluent in excess of the following limits is <br />prohibited: <br />30-Day Daily <br />Constituents Units Median Maximum <br />Total Petroleum 4/1 <50 100 <br />Hydrocarbons <br />(3050 GCFID) <br />Benzene 49/1 <0.5 5* <br />Ethyl Benzene 4/1 <0.5 5* <br />Toluene pg/1 <0.5 5* <br />Xylene pg/1 <0.5 5* <br />Lead pg/1 5 50 <br />* The sum of the concentrations of benzene, ethyl benzene, toluene, <br />and xylene in any single sample shall not exceed 5 pg/l. <br />The discharge shall not have a pH of less than 6.5 nor greater than <br />8.5. <br />There shall be no acute toxicity in undiluted effluent. Acute <br />toxicity is defined as less than ninety percent survival, fifty <br />percent of the time, and less than seventy percent survival, ten <br />percent of the time, of standard test organisms in undilut: <br />effluent in 96-hour static or continuous-flow tests. <br />D. Solids Disposal: <br />Collected screenings, sludges, and other solids removed from liquid <br />wastes or used to treat liquid wastes shall be disposed of in a <br />manner that is consistent with Chapter 15, Division 3, Title 23, of <br />the CCR and approved by the Executive Officer. <br />Any proposed change in solids use or disposal practice shall be <br />reported to the Executive Officer and EPA Regional Administrator at <br />least 90 days in advance of the change.