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V/ED <br /> A M B R f A AUG 1 1 2004 <br /> } ENVIRONMENT fiEALTH <br /> PERMIT/SERVICES <br /> August 9, 2004 <br /> Mr Harlan Knoll <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 2004 <br /> Shell-branded Service Station <br /> 3725 Tracy Boulevard <br /> Tracy, California <br /> SAP Code 136186 <br /> Incident No 98996222 <br /> Dear Mr Knoll <br /> Cambria Environmental Technology, Inc (Cambria) prepared this report on behalf of Equilon <br /> Enterpnses LLC dba Shell Oil Products US (Shell) in accordance with the quarterly reporting <br /> requirements of 23 CCR 2652d <br /> SECOND QUARTER 2004 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 and laboratory analytical data Cambria prepared a <br /> site vicinity/well survey map (Figure 1), and a groundwater contour/chemical concentration map <br /> (Figure 2) Blame's report, which includes the laboratory report, is included as Appendix A <br /> Sampling was coordinated with sampling activities conducted at the Chevron service station <br /> located at 3775 Tracy Boulevard Available groundwater monitoring data and analytical results <br /> for the Chevron station are included as Appendix B <br /> REMEDIATION HISTORY <br /> Periodic groundwater extraction (GWE) using a vacuum truck occurred from February 7, 2000 to <br /> September 23, 2003 During this period a total of 206,501 gallons of groundwater were <br /> removed Respective mass removals of total petroleum hydrocarbons as gasoline, benzene, and <br /> MTBE during GWE totaled 5 45, 0 102, and 515 pounds <br /> Cambria ANTICIPATED THIRD QUARTER 2004 ACTIVITIES <br /> Environmental <br /> OTechnology, Inc Blaine will gauge and sample the site wells according to the existing sampling schedule and <br /> peTkins street tabulate the data Cambria will prepare a groundwater monitoring report <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />