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. Site History <br /> Canepa's Car Wash(Pacific Avenue) <br /> Page—4- <br /> domestic and municipal wells, two schools, three child-care facilities, and three LUST sites within the study <br /> area.No apparent actively pumped drinking water wells were located within 500 feet of the site, however. <br /> Condor performed additional groundwater investigation activities at the site consisting of three CPT borings, <br /> hydropunch sampling, and the installation of three soil borings and four monitor wells. Details of the <br /> investigation are presented in the Additional Soil and Groundwater Investigation Report dated January 21, <br /> 2002. Twelve monitor wells, MW-1 through MW-12d, were surveyed as part of the investigation. The new <br /> survey identified errors in the previously reported elevations of monitor wells MW-6 and MW-7. The new <br /> survey elevations for these wells are higher than previously reported, and consequently, the groundwater <br /> elevation contours for the site no longer indicate a groundwater mound in the vicinity of monitor well MW-2. <br /> The task of surveying the monitor wells was sufficient to complete the Groundwater Monitoring Study <br /> Report dated February 13,2002. <br /> Condor performed quarterly monitoring activities at the site on January 10, 2002. Laboratory analytical <br /> results of the groundwater samples indicated concentrations of petroleum hydrocarbon constituents that were <br /> consistent with historical data. The analytical results also indicated substantial declines in contaminant <br /> concentrations in monitor wells MW-11 and MW-12d compared to the initial laboratory analytical data <br /> collected from these wells in October 2001. <br /> Condor performed quarterly monitoring activities at the site on April 4, 2002. Laboratory analytical results of <br /> the groundwater samples indicated concentrations of petroleum hydrocarbon constituents that were consistent <br /> with historical data with the exception that concentrations of BTEX constituents generally declined in <br /> monitor well MW-2, and low concentrations of benzene and TPH-G were detected in well MW-4. The <br /> analytical results also indicated declines in contaminant concentrations in monitor wells MW-11 and MW- <br /> 12d compared to the initial laboratory analytical data collected from these wells in October 2001. <br /> 11:11707 Canepa11707 Canepa-PaciiicQuarterly Monitoring\July 200Manepa's SITE HISTORY.doc <br />