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P <br />E <br />Ll <br />n <br />n <br />n <br />0 <br />n <br />D- <br />E <br />Leachate <br />Waste Discharge Requirements require monthly monitoring of leachate flow rate, pH, and <br />Electrical Conductivity (Table 2). A comparison of the leachate monitoring data to groundwater <br />monitoring data shows that leachate generally contains significantly higher TDS, Electrical <br />Conductivity, and Chloride than groundwater. Leachate is also slightly more acidic than <br />groundwater. <br />Leachate sampling occurred in the fourth quarter at collection point L-1, L-3, and L-4 (Table 7). <br />Seventeen different VOCs were reported. The Highest VOC concentrations reported were the <br />Xylenes, MtBE, the benzene compounds, and Toluene. Of the dissolved metals, Iron and <br />Manganese concentrations were the highest. Results are consistent with past leachate monitoring <br />events. <br />Leachate is removed from the base of the landfill by a Leachate Collection and Recovery System <br />as approved in WDR Order No. R5-2002-0219. <br />North County RCSL 8 Public Works/Solid Waste <br />2nd Semester and Annual 2005 Groundwater Monitoring County of San Joaquin — January 24, 2006 <br />