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Operation of the pump is conditional upon sufficient water in the sump and available capacity in the leachate <br /> tank. Electrical controls include a high level alarm set at the maximum design leachate level for the sump. <br /> The alarm is activated if the leachate exceeds the alarm level. The alarm level is chosen to maintain the head <br /> on the module base below the maximum allowed 12 inches. <br /> The leachate storage tank facility includes secondary containment (consisting of a concrete vault surrounding <br /> the tank) and a truck loading area. Electrical controls for the leachate storage tank include a high level <br /> sensor that will sound an alarm and disable the leachate sump pump to prevent overtopping of the tank. <br /> Disposal <br /> Leachate is applied to the waste surfaces or travel surfaces within Module 1 in accordance with the WDR. <br /> Leachate is either pumped directly from the sump to the active face, or pumped to the storage tank from <br /> which it is removed by water truck to Module 1. At no time was leachate returned to Module"I". <br /> Leachate System Monitoring and Maintenance <br /> The cumulative volume of leachate removed from the sump and the flow rate provided by the sump pump is <br /> tested monthly. A decrease in pumping rate will indicate the need to clean a filter or to investigate pump <br /> wear. Leachate production rate is greater in the late winter and spring, compared to summer and autumn, <br /> because little or no rain falls on the site from April to November of each year. The LCRS includes pipe <br /> risers at the end of each leachate lateral to enable video camera inspection of key portions of the pipe <br /> network. The moderate pipe bends of the risers allow cameras to be pushed several hundred feet into the <br /> network to record pipe conditions and depth of flows in the LCRS network. A wire rope is installed in each <br /> leachate lateral pipe to enable the pulling of a camera through the entire length of the risers. <br /> Foothill Sanitary Landfill 11 Department of Public Works/Solid Waste <br /> 1s`Semester 2008 Groundwater Monitoring County of San Joaquin—July 31,2008 <br />