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I 7 <br /> C A M D R A <br /> May 28, 2002 <br /> Mr. Mike Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, California 95202 <br /> Re: Groundwater Monitoring Report— First Quarter 2002 <br /> Former Shell Service Station <br /> 1267 Country Club Boulevard <br /> Stockton, California <br /> SAP Code 129480 <br /> Incident No. 97093419 <br /> SJCPHS/EHD Site Code 505602 <br /> Dear Mr. Infurna: <br /> Effective March 1, 2002, Equiva Services LLC and Equilon Enterprises LLC are now doing <br /> business as (dba) Shell Oil Products US (Shell). Cambria Environmental Technology, Inc. <br /> (Cambria) prepared this report on behalf of Shell in accordance with quarterly reporting <br /> guidelines issued by the Central Valley Regional Water Quality Control Board and San Joaquin <br /> County Public Health Services, Environmental Health Division. <br /> FIRST QUARTER 2002 ACTe 1VI71ES <br /> Blaine Tech Services, Inc. (Blaine) of San Jose, California gauged and sampled all site wells at <br /> the subject site. This event was coordinated with the Tosco (Former BP) station located at <br /> 1403 Country Club Boulevard. Blaine prepared a summary table of field gauging data and <br /> petroleum constituents. Cambria compiled the oxygenate and lead scavenger data (Table 1), <br /> prepared a site vicinity/well survey map (Figure 1), and prepared a groundwater <br /> contour/chemical concentration map (Figure 2). Blaine's report, presenting the laboratory report, <br /> is included as Appendix A, and the Tosca gauging and analytical data are included in <br /> Appendix B. <br /> Oakland, CA <br /> San Ramon, CA ANTICIPATED SECOND QUARTER 2002 ACTIVITIES <br /> SOnoma, CA <br /> Cambria Blaine will coordinate quarterly sampling events with the Tosco station. They will gauge and <br /> Environmental sample the site wells according to the existing sampling schedule and tabulate the data. Cambria <br /> Technology,Inc. will prepare a groundwater monitoring report. <br /> SeTkins Street <br /> P.O.Box 259 <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />