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WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2009-0049 -14- SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS HARNEY LANE LANDFILL SAN JOAQUIN COUNTY b. Causing erosion or inundation of the landfill cover or other areas of site, or c. Causing sedimentation and clogging of the storm drains. 8. The Discharger shall continue to monitor all required media per MRP No. R5-2009-0049 throughout the postclosure maintenance period. 9. The postclosure maintenance period shall continue until the Regional Water Board verifies that remaining waste in the landfill will not threaten water quality. See also Closure and Postclosure Specification IX.J. D. FACILITY SPECIFICATIONS 1. The Discharger shall immediately notify the Regional Water Board of any flooding, unpermitted discharge of waste off-site, equipment failure, slope failure, or other change in site conditions that could impair the integrity of waste or leachate containment facilities or precipitation and drainage control structures. 2. The Discharger shall maintain the landfill final cover, precipitation and drainage controls, monitoring wells, gas extraction system, and all other associated landfill facilities, as necessary, in order to comply with this Order. 3'. The Discharger shall maintain in good working order any facility, control system, or monitoring device installed to achieve compliance with the waste discharge requirements. All storm water controls, including drainage facilities, shall be maintained so that they function effectively during precipitation events. 4. Methane and other landfill gases shall be adequately vented, removed from the Unit, or otherwise controlled to prevent the danger,of adverse health effects, nuisance conditions, or the impairment of the beneficial uses of surface water or groundwater due to migration through the unsaturated zone. 5. All wells within 500 feet of the waste management units shall have sanitary seals that meet the requirements of the San Joaquin County Environmental Health Department or shall be properly abandoned. A record of the sealing and/or abandonment of such wells shall be sent to the Regional Water Board and to the State Department of Water Resources. 6. The Discharger shall maintain a copy of this Order and make it available at all times to facility operating personnel, who shall be familiar with its contents, and to regulatory agency personnel. E. MONITORING SPECIFICATIONS 1. The Discharger shall conduct background and corrective action groundwater monitoring, as specified in MRP No. R5-2009-0049. Background monitoring shall be conducted for the purpose of establishing and updating concentration limits as part of the Water Quality Protection Standard per Title 27 section 20400(a). Corrective action monitoring shall be conducted for the purpose of assessing the