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C A BVI R <br /> 10 <br /> 03 JUL 28 <br /> July 24, 2003 <br /> Mr. Michael 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 2003 <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 /> • 5=-00XD QUAR a 2Z72 2003 QC"'V17EF-5 <br /> Blaine Tech Services, Inc. (Blaine) of San Jose, California gauged the site wells and sampled <br /> selected wells at the subject site. Blaine prepared a summary table of field gauging data and <br /> petroleum hydrocarbon concentrations for the Shell site_ Cambria prepared a summary table of <br /> additional groundwater analytical data(Table 1), a site vicinity/well survey map (Figure 1), and a <br /> groundwater contour/chemical concentration map (Figure 2). Blaine's report, presenting the <br /> laboratory report, is included as Appendix A. The quarterly sampling event was coordinated <br /> with the Tosco (former BP) station located at 1403 Country Club Boulevard. The groundwater <br /> monitoring data and analytical results for the Tosco station are included on Figure 2 and in <br /> Appendix B. <br /> Oakland, CA As requested by the San Joaquin County Environmental Health Department, in addition to <br /> Sonoma, to <br /> Portland, OR petroleum hydrocarbons, groundwater samples from well S-3 were analyzed for dissolved metals <br /> Seattle, WA (cadmium, chromium, lead, nickel, and zinc), naphthalene, creosote, and polychlorinated <br /> biphenyls (PCBs). No cadmium, chromium, lead, naphthalene, creosote, or PCBs were detected. <br /> Cambria <br /> Environmental Nickel and zinc were detected at 8.16 and 195 part per billion, respectively. <br /> Technology,Inc. <br /> 0-Tkins Street <br /> P.4,Box 259 <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />