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It does not appear that this event has impacted groundwater. Monitoring of the secondary sump, <br /> and removal of condensate remaining in the secondary sump as it becomes available to pump, <br /> continues on a monthly basis (Table 6). <br /> MONITORING PROGRAM <br /> Water quality is monitored in accordance with WDR Order No. R5-2003-0020. <br /> Groundwater <br /> The groundwater well network consists of upgradient well MW-4 and downgradient wells <br /> MW-2R, MW-3, and MW-5. <br /> Groundwater elevation data from MW-4 (installed 2006) indicates that MW-1, which had <br /> previously been considered the"upgradient",was in fact crossgradient from a portion of the <br /> landfill. Therefore, MW-1 provides information on background water quality conditions for the <br /> downgradient wells. <br /> All monitoring wells are equipped with dedicated purge and sampling pumps. <br /> Groundwater samples are analyzed semiannually for the following field and monitoring <br /> parameters as specified in the WDRs: <br /> • Temperature • Chloride <br /> • Electrical Conductivity • Sulfate <br /> • pH • Nitrate-Nitrogen <br /> • Turbidity • Calcium <br /> • Total Dissolved Solids • Magnesium <br /> • Potassium • Sodium <br /> • Carbonate Alkalinity • Bicarbonate Alkalinity <br /> • Volatile Organic Compounds (VOCs) <br /> Groundwater samples are analyzed every 5 years for the following Constituents of Concern <br /> (CDCs): <br /> • Total Organic Carbon <br /> • Inorganics (dissolved) <br /> • VOCs (extended list) <br /> • Semivolatile Organic Compounds <br /> • Chlorophenexy Herbicides <br /> • Organophosphorous Compounds <br /> Foothill Sanitary Landfill 5 Department of Public Works/Solid Waste <br /> 2ntl Semester and Annual 2010 Groundwater Monitoring County of San Joaquin—January 31,2011 <br />