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r r <br /> 4%) C AM B R I A <br /> JUL 2 4 2002 July 22,2002 <br /> ENVIRONMENT HEALTH <br /> Mr Harlin Knoll PERMIT/SERVICES <br /> San Joaquin County Environmental Health Department <br /> 304 E Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Groundwater Monitoring Report- Second Quarter 2002 <br /> Shell branded(Independent)Service Station <br /> 420 West Kettleman Lane <br /> Lodi,California <br /> SAP Code 135445 <br /> Incident No 98995525 <br /> SJCEHD Site Code 19061 <br /> Dear Mr Knoll <br /> Cambna Environmental Technology, Inc (Cambna) prepared this report on behalf of Equilon <br /> Enterprises LLC dba Shell Oil Products US (Shell) m accordance with the quarterly reporting <br /> requirements of 23 CCR 2652d <br /> SECOND QUARTER 2002 ACTIVITES <br /> Blame Tech Services, Inc (Blaine) of San Jose, California gauged and sampled all Shell site <br /> wells monthly through May 2002 Normally quarterly sampling events are coordinated with the <br /> former Chevron station located at 301 West Kettleman Lane, however, this quarter the gauging <br /> data from each site were collected five days apart Blaine prepared a summary table of field <br /> gauging data and petroleum hydrocarbon and methyl tertiary butyl ether (MTBE) concentrations <br /> for the Shell site Cambna prepared a site vicinity map (Figure 1), an extended site map <br /> (Figure 2), and a groundwater elevation/chenucal concentration map for each month (Figures 3 <br /> and 4) Blaine's report, presenting the laboratory reports, is included as Appendix A, and tables <br /> summarizing the former Chevron well gauging and analytical data for April 2002 are included as <br /> Appendix B <br /> Oakland CA Because the well gauging for the two sites occurred on different days, Cambna did not prepare a <br /> San Ramon CA groundwater contour map <br /> Sonoma CA <br /> During the April and May 2002 sampling events, no total petroleum hydrocarbons as gasoline, <br /> Cambna <br /> Environmental benzene, or MTBE were detected in any of the Shell site wells Benzene and MTBE data from <br /> Inology,Inc these sampling events are presented on Figures 3 and 4 <br /> 270 Perkins Street <br /> P O Box 259 <br /> Sonoma CA 95676 <br /> Tel(707)935-6850 <br /> fax(707)935-6669 <br />