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1 <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 /> 1 tested monthly. A decrease in pumping rate will indicate the need to clean a filter or to investigate pump <br /> wear. <br /> Leachate production rate is greater in the late winter and spring, compared to summer and autumn, because <br /> little or no rain falls on the site from April to November of each year. <br /> The LCRS includes pipe risers at the end of each leachate lateral to enable video camera inspection of key <br /> portions of the pipe network. The moderate pipe bends of the risers allow cameras to be pushed several <br /> hundred feet into the network to record pipe conditions and depth of flows in the LCRS network. A wire <br /> rope is installed in each leachate lateral pipe to enable the pulling of a camera through the entire length of the <br /> risers. <br /> 1 HISTORICAL TIME SERIES PLOTS <br /> 1 Historical Time Series Plots are presented in Appendix F. Note that constituents not detected are plotted at a <br /> value of half their respective detection limits. Outliers were included in the plots as directed by RWQCB <br /> staff. <br /> 1 <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Foothill Sanitary Landfill 11 Department of Public Works/Solid Waste <br /> 1 `Semester Groundwater Monitoring County of San Joaquin—July 31,2007 <br />