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ENVIRONMENTAL HEALTH DEPARTMENT <br /> aa�iN SAN JOAQVIN COUNTY <br /> UnttSupervisors <br /> r` ?� Donna k Heran,R E H S Carl Bar an, <br /> Director 304 East Weber Avenue,Third Floor ' R H S <br /> 3 { Mike Huggins,R E H S , <br /> Al.Olsen,R E N S Stockton, California 95202-2705 Douglas W Wilson,R E <br /> FpRN`P Program,Manager Telephone (209) 468-3420 Margaret Lagorio,R E H s <br /> Laurie A Cotulla,R E H S <br /> Program 141anager Fax (209) 464-0138 Robert M on,R E H S <br /> Marl,Barcellccllos,R E H$ <br /> JUN 2 4 2002 <br /> QUIK STOP MARKETS <br /> MIKE KARVELOT <br /> 4567 ENTERPRISE STREET <br /> FREMONT CA 94538 <br /> t f <br /> RE Quik Stop Market #39 Site Code 1111 <br /> 2285 E Fremont St RO# 0000428 <br /> Stockton, CA 95205 <br /> San Joaquin County Environmental Health Department (EHD) has reviewed the <br /> "Quarterly Groundwater Monitoring Report — Second Quarter 2002" dated June <br /> 19, 2002 as submitted by your consultant, Horizon Environmental Inc on June <br /> 21 , 2002 Recommendations included in this report requested comments from <br /> the EHD "regarding the suitability of the site for closure" The following <br /> comments are offered for your consideration . <br /> As stated in EHD correspondence dated January 8, 2002, sites with <br /> contaminants detected in the groundwater that exceed maximum contaminant <br /> levels (MCL) are to continue their investigation and define the lateral and vertical <br /> limits of those contaminants before a request for `site closure' (no further action- <br /> NFA) can be evaluated <br /> On May 2, 2002 1 ,2-Dichloroethane (DCA) was detected in the groundwater <br /> samples from all three (onsite) monitoring wells, with MW-2 reporting the highest <br /> concentration yet detected on the site at 210 ugh With DCA groundwater <br /> contamination exceeding MCL of 0 5 ug/l, the groundwater impact from this UST <br /> site=cannot=be=considered=laterally=or vertically=delineated=and=fur#her <br /> investigation is required <br /> All UST sites with contaminated groundwater and undefined lateral limits must <br /> also identify surrounding sensitive receptors, (domestic and municipal drinking <br /> water wells, surface waters, etc ) before NFA requests can be evaluated Please <br /> conduct a 2000-foot radius sensitive receptor search around the site and submit <br /> the findings to EHD in a timely manner EHD will sign off the official request <br /> required to review Department of Water Resources (DWR) files when your <br /> consultant submits it to EHD <br />