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C A M B R I A <br /> April 23, 2002 <br /> Ms Lon Duncan <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 /> Shell-branded Service Station <br /> 7910 Lower Sacramento Road <br /> Stockton, California <br /> SAP Code 136139 <br /> Incident No 98996180 <br /> SJCPHS/EHD Site Code 1660 <br /> Dear Ms Duncan <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 the San <br /> Joaquin County Public Health Services,Environmental Health Division(SJCPHS/EHD) <br /> FIRST QUARTER 2002 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled all site wells and <br /> prepared a summary table of field gauging data and gasoline constituents Cambria prepared a <br /> site vicinity map (Figure 1) and a groundwater contour/chenucal concentration map (Figure 2) <br /> Blaine's report,presenting the laboratory report, is included as Appendix A <br /> ANTICIPATED SECOND QUARTER 2002 ACTIVITIES <br /> Blaine will gauge and sample the site wells according to the existing sampling schedule and <br /> Oakland CA tabulate the data Cambria will prepare a groundwater monitoring report <br /> San Ramon CA <br /> Sonoma CA <br /> Cambna <br /> ErVITOnmental <br /> Technology,Inc <br /> operkins Street <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />