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Leachate System Monitoring and Maintenance <br /> The cumulative volume of leachate removed from the sump and the flow rate provided by the <br /> sump pump is tested monthly. A decrease in pumping rate will indicate the need to clean a filter <br /> or to investigate pump wear. <br /> 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. <br /> The LCRS includes pipe risers at the end of each leachate lateral to enable video camera <br /> inspection of key portions of the pipe network. The moderate pipe bends of the risers allow <br /> cameras to be pushed several hundred feet into the network to record pipe conditions and depth of <br /> flows in the LCRS network. A wire rope is installed in each leachate lateral pipe to enable the <br /> pulling of a camera through the entire length of the risers. <br /> HISTORICAL TIME SERIES PLOTS <br /> Historical Time Series Plots are presented in Appendix F. Note that constituents not detected are <br /> plotted at a value of half their respective detection limits. Outliers were included in the plots as <br /> directed by RWQCB staff. <br /> MONITORING ANALYTICAL DATA <br /> Historical groundwater and surface water monitoring data is contained on the attached diskette. <br /> The zip file contains Excel files and Sanitas compatible text files in tab-delimited format. The text <br /> files can be used for statistical analyses. <br /> Computer Disk <br /> Foothill Sanitary Landfill 12 Department of Public Works/Solid Waste <br /> 1ST Semester 2005 Groundwater Monitoring County of San Joaquin-July 29,2005 <br />