ARCHIVED REPORTS_1996_2 - Laserfiche WebLink

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WASTE DISCHARGE REQUIREMENTS _g_ FOR CITY OF STOCKTON AUSTIN ROAD LANDFILL FACILITY CLASS III LANDFILL SAN JOAQUIN COUNTY 2. Wastes shall not be discharged below an elevation of 20 feet, mean sea level (MSL). A minimum separation of 5 feet shall be maintained between wastes or leachates and the highest anticipated elevation of underlying ground water including the capillary fringe. All wells within 500 feet of the landfill shall be sealed or abandoned to the satisfaction of the San Joaquin County Public Health Services Department prior to the discharge of waste to the landfill. A record of the sealing and/or abandonment of such wells shall be sent to the Board and to the State Department of Water Resources. 4. Leachate generation by a landfill unit LCRS shall not exceed 85% of the design capacity of the sump pump. If leachate generation exceeds this value or if the depth of fluid in an LCRS exceeds the minimum needed for pump operations, then the Discharger shall immediately cease the discharge of sludges and other high -moisture wastes to the landfill unit and shall notify the Board in writing within seven days. Notification shall include a timetable for remedial or corrective action necessary to reduce leachate production. 6. Neither the treatment nor the discharge of wastes shall cause a pollution or nuisance as defined by the California Water Code, Section 13050. General Waste Management Unit Construction 7. Clay liners and landfill caps shall have hydraulic conductivities of I * 0' cm/s and 10-6 cm/s respectively or less and a minimum relative compaction of 90%. Hydraulic conductivities of liner materials shall be determined by laboratory tests using solutions with similar properties as the fluids that will be contained. Hydraulic conductivities of cap materials shall be determined by laboratory tests using water. Hydraulic conductivities determined through laboratory methods shall be confirmed by field testing in accordance with the Standard Provisions and Reporting Requirements as described in Provision D.1. 8. LCRSs shall be designed, constructed and maintained to collect twice the anticipated daily volume of leachate generated by the landfill and to prevent the buildup of hydraulic head on the underlying natural geologic materials of low hydraulic conductivity. The depth of fluid in any LCRS sump shall be maintained as low as feasible and no greater than the minimum needed for safe pump operation.