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C A M B R A JUL 2 9 2002 <br /> ENVIRONMENT HEALTH <br /> PERMIT/SERVICES July 22, 2002 <br /> Mr. Mike Infurna <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re: Groundwater Monitoring Report— Second Quarter 2002 <br /> Former Shell Service Station <br /> 1267 Country Club Boulevard <br /> Stockton, California <br /> SAP Code 129480 <br /> Incident No. 97093419 <br /> SJCEHD Site Code 505602 <br /> Dear Mr. Infurna: <br /> Cambria Environmental Technology, Inc. (Cambria) prepared this report on behalf of Equilon <br /> Enterprises LLC dba Shell Oil Products US (Shell) in accordance with the quarterly reporting <br /> requirements of 23 CCR 2652d. <br /> SECOND (TARTER 2002 ACTGV71ES <br /> Blaine Tech Services, Inc. (Blaine) of San Jose, California gauged and sampled selected site <br /> wells at the subject site. Normally, quarterly sampling events are coordinated with the Tosco <br /> station located at 1403 Country Club Boulevard; however, this quarter the gauging data from <br /> each site were collected four days apart. Blaine prepared a summary table of field gauging data <br /> and petroleum hydrocarbon and methyl tertiary butyl ether (MTBE) concentrations for the Shell <br /> site. Cambria prepared an oxygenate and lead scavenger data table (Table 1), a site vicinity/well <br /> survey map (Figure 1), and a groundwater contour/chemical concentration map (Figure 2). <br /> Blaine's report, presenting the laboratory report, is included as Appendix A, and a table <br /> summarizing the Tosco gauging and analytical data is included in Appendix B. <br /> ANTICIPATED THIRD QUARTER 2002 ACTIVITIES <br /> Oakland, CA <br /> San Ramon, CA Blaine will coordinate quarterly sampling events with the Tosco station and gauge and sample <br /> Sonoma, CA <br /> the site wells according to the existing sampling schedule and tabulate the data. Cambria will <br /> Cambria prepare a groundwater monitoring report. <br /> Environmental <br /> chnology,Inc. <br /> Perkins Street <br /> P.O.Box 259 <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />