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U <br /> Site History <br /> Canepa's Car Wash(Pacific Avenue) <br /> Page 6 of 6 <br /> Condor performed quarterly monitoring activities at the site on December 14 and 15, 2002 Laboratory <br /> analytical results of the groundwater samples indicated concentrations of petroleum hydrocarbon <br /> constituents consistent with historical data At the request of Mr Jeffrey Wong of the SJCEHD, <br /> groundwater monitoring for gasoline oxygenates/additives was reinstated during the first quarter of 2003 <br /> The benzene concentration detected in groundwater samples collected from MW-1 was higher than <br /> previously detected during the October 2002 monitoring event 1,2-dicholoroethane (1,2-DCA) and <br /> tertiary-butanol (TBA) were detected in groundwater samples collected from MW-3 and MW-11 at <br /> concentrations of 190 1tg/L and 15 gg/L, respectively The groundwater sample analytical results from <br /> well MW-12D continue to indicate a trend of lower contaminant concentrations since the initial sampling <br /> event for this well conducted on October 25, 2001 The groundwater analytical results for SVE-4 were <br /> generally consistent with the September 2002 groundwater analytical results reported for SVE-4, <br /> however, benzene was detected in the soil vapor sample collected from the effluent port at a per liter <br /> volume concentration of 0 79 parts per million (ppm) <br /> P 11707 Canepa11707 Canepa-PaciFc\Quarterly Monitoring12003 January\Canepa's SITE HISTORY doe <br />