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3 <br /> Site History <br /> Jackpot Food Mart, 1434 W Yosemite Ave , Manteca, CA <br /> Time Oil Property No. 04-167 <br /> After the installation of the wells, a vapor extraction pilot test was performed <br /> on Wl, W2, and W4 to evaluate the feasibility of in-situ remediation by vapor <br /> extraction The results of the study indicated that soil vapors can be easily <br /> extracted from the existing wells and that this technology appears appropriate <br /> for site remediation <br /> Based on the results of the site assessment and previous investigations, it <br /> appears that the extent of gasoline-impacted soil is well defined and remains <br /> limited to the area of the pump islands Although trace concentrations of <br /> xylenes were present in the groundwater sample collected from W4, the levels <br /> indicated were far below California's primary drinking water quality standards <br /> (1750 ppb for xylenes) <br /> A copy of Canonie Environmental's "Site Assessment Report, Underground Storage <br /> Tank Site, Time Oil Co , Jackpot Food Mart, Manteca, California" was forwarded <br /> to the PHS/EHD and CRWQCB on May 26, 1993 In their reply dated June 24, 1994, <br /> the PHS/EHD requested that additional borings be placed to determine the extent <br /> of hydrocarbon-impacted soils and that the groundwater monitoring wells on the <br /> subject site be re-sampled <br /> 3 <br />