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1 <br /> r <br /> I APR 12 2004 <br /> Er,!o k April 9, 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 /> Shell-branded Service Station <br /> 2575 Country Club Boulevard <br /> Stockton, California <br /> SAP Code 136144 <br /> Incident No 98996184 <br /> SJCEHD Site Code 1071 <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 /> FIRST QUARTER 2004 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled the wells and <br /> prepared a summary table of field gauging and laboratory analytical data Blaine also collected <br /> monthly samples from monitoring well MW-14 and the domestic well located at 2452 Country <br /> Club Boulevard, in November and December 2003 Cambria prepared a site vicinity map <br /> (Figure 1) and a groundwater contour/chenucal concentration map (Figure 2) Blaine's report, <br /> presenting the laboratory reports, is included as Appendix A <br /> REMEDIATION <br /> From March 1999 through August 2000, periodic groundwater extraction (GWE) events were <br /> performed on well RW-1A During each GWE event, approximately 5,000 gallons of water was <br /> purged by a vacuum truck and transported to the Martinez Refining Company for recycling On <br /> August 22, 2000 a pump was installed in RW-1A, which pumped into a Baker tank A vacuum <br /> truck emptied the tank and recycled the water as described above During March 2001, the Baker <br /> Cambria tank was removed and a vacuum truck was employed to extract groundwater directly from <br /> Environmental RW-lA on a bi-weekly basis Vacuum truck events were discontinued after the July 17, 2001 <br /> Technology,Inc <br /> event <br /> Perkins Street <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />