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f T <br /> CAMBR [ A <br /> March 31, 2001 <br /> Ms. Margaret Lagorio <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 E. Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re: Groundwater Monitoring Report - First Quarter 2001 <br /> Shell-branded Service Station <br /> 620 West Charter Way <br /> Stockton, California <br /> SAP Code 136147 <br /> Incident No. 98996187 <br /> Dear Ms. Lagorio: <br /> Cambria Environmental Technology, Inc. (Cambria) prepared this report on behalf of Equiva <br /> Services LLC in accordance with quarterly reporting requirements issued by the Central Valley <br /> Regional Water Quality Control Board and San Joaquin County Public Health Services. <br />. FIRST QUARTER 2001 ACTIVITIES <br /> Blaine Tech Services, Inc. (Blaine) of San Jose, California gauged and sampled all wells and <br /> prepared a summary table of field gauging data and gasoline constituents. Cambria compiled <br /> the additional analytical data (Table 1), prepared a site vicinity map (Figure 1), and prepared <br /> a groundwater contour/chemical concentration map (Figure 2). Blaine's report, presenting <br /> the laboratory report, is included as Appendix A. <br /> In addition to the standard analyses, the groundwater sample collected from well MW-8 was <br /> analyzed for 1,2-dichloroethane to confirm the detection during the second quarter 2000 <br /> sampling event. None was detected. <br /> ANTICIPATED SECOND QUARTER 2001 ACTIVITIES <br /> Oakland, CA Blaine will gauge and sample the site wells according to the existing sampling schedule and <br /> San Ramon, CA tabulate the data. Cambria will prepare a groundwater monitoring report. <br /> Sonoma, CA <br /> Cambria REMEDIATION SUMMARY <br /> Environmental <br /> Technology,inc. A soil vapor extraction (SVE) system operated at this site from September 1992 to <br /> November 1996. During this time, the SVE system removed approximately 17,628 pounds <br /> Perkins Street <br /> P.O.Box 259 of vapor phase total purgeable hydrocarbons as gasoline from the subsurface. <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />