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CAM B RIA <br /> May 4, 2004 <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— First Quarter 2004 <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 /> Enterpnses LLC dba Shell Oil Products US (Shell) in accordance with the quarterly reporting <br /> requirements of 23 CCR 2652d <br /> FIRST QUARTER 2004 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged the site wells and sampled <br /> selected wells at the subject site The quarterly sampling event was coordinated with the Tosco <br /> (former BP) station located at 1403 Country Club Boulevard Blayne prepared a summary table <br /> of field gauging and groundwater analytical data for the Shell site Cambria prepared a site <br /> vicinity/well survey map (Figure 1), and a groundwater contour/chemical concentration map with <br /> data from the Shell site and the Tosco site (Figure 2) Blaine's report, presenting the laboratory <br /> report for the subject site, is included as Appendix A The groundwater monitoring data and <br /> analytical results for the Tosco station are included in Appendix B <br /> The laboratory noted that the total petroleum hydrocarbons as diesel (TPHd) reported for wells <br /> S-1 and S-2 are due to hydrocarbons in the early diesel range and may indicate the presence of <br /> aged gasoline The TPHd to well S-3 also does not match the laboratory's standard <br /> Cambria Cambria received San Joaquin County Environmental Health Department's (SJCEHD's) <br /> Environmental March 22, 2004 letter requesting a work plan <br /> Technology, Inc 10 �����f](� <br /> *PeTkins StTeet <br /> P 0 Box 259 MAY 1 0 ZOOM <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 ENVIRUNIMB i HLALTH <br /> Fax(707)935-6649 PERMIT/SERVICES <br />