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ENGINEERING FEASIBILITY REPORT <br /> and <br /> PROPOSED CORRECTIVE ACTION PROGRAM <br /> FOOTHILL SANITARY LANDFILL <br /> PURPOSE <br /> This report presents the results of Evaluation vionitoring at the Foothill Sanitary <br /> p Landfill in <br /> response to volatile organic compounds (VOCs) detected at groundwater monitoring well MW-3 <br /> in 2000 and 2001. The objective of the Evaluation Monitoring Program was to delineate the <br /> suspected VOC release. This report also proposes a Corrective Action Program based on the <br /> ' results of the Evaluation Monitoring. <br /> This work was in accordance with the Evaluation Monitoring Plan(EMP) submitted to the <br /> Central Valley Regional Water Quality Control Board on October 21,2002,compliant with <br /> Title 27, California Code of Regulations (CCR) Section 20420(k)(5). <br /> RESULTS <br /> VOCs were not detected in water samples from any exploratory boring,which is consistent with <br /> data from MW-3 collected since January 2002,indicating lack of VOC contamination. These <br /> results,together with the results of Detection Monitoring at the site,indicate that groundwater is <br /> not impacted by the presence of the Foothill Landfill at this time (Appendix A). <br /> Several VOCs were detected in soil gas samples;however,none of these VOCs were detected in <br /> ' water samples. Soil gas analytical results also do not correlate with past groundwater results, as <br /> none of the VOCs now detected in the soil gas were detected at well MW-3 in the past. <br /> BACKGROUND <br /> The Foothill Sanitary Landfill is a single Waste Management Unit comprised of an unlined <br /> Module of approximately 83 acres (Module"I"), and a new, lined Module now under <br /> construction(Module 1). Other pertinent aspects of this site are: <br /> Groundwater elevation: Approximately 50 feet MSL <br /> Depth to groundwater: Approximately 250 feet <br /> Soils Characteristics: The site materials from the surface to 300 feet in the landfill <br /> vicinity consist of consolidated gravels, sandstones, siltstones, <br /> claystone and mudstone. <br /> Engineering Feasibility Report Foothill Sanitary Landfill <br /> October 30,2003 San Joaquin County Solid Waste <br />