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C A M B R A <br /> July 31, 2001 <br /> Mr. Mike Infurna <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 — Second Quarter 2001 <br /> Former Shell Service Station <br /> 1267 Country Club Boulevard <br /> Stockton, California <br /> SAP Code 129480 <br /> Incident No. 97093419 <br /> SJCPHS Site Code 505602 <br /> Dear Mr. Infurna: <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 /> Environmental Health Division (SJCPHS/EHD). <br /> SE:CXD Q;%�"A'2RER 200" AC7V7'ES <br /> Blaine Tech Services, Inc. (Blaine) of San Jose, California gauged all site wells, sampled <br /> selected wells, and prepared a summary table of field gauging data and petroleum constituents. <br /> Cambria compiled the oxygenate and lead scavenger data (Table 1), prepared a site vicinity reap <br /> (Figure 1), and prepared a groundwater contour/chemical concentration map (Figure 2). Blaine's <br /> report, presenting the laboratory report, is included as Appendix A. <br /> ANTICIPATED THIRD QUARTER 2001 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 CONCLUSIONS AND RECOMMENDATIONS <br /> Cambria <br /> Environmental As discussed during our June 19, 2001 meeting with SJCPHS/EHD staff, there is the question of <br /> T nology,inc, whether the underground storage tanks associated with the former service station have been <br /> Perkins Street removed. To resolve this issue, Cambria proposes performing a geophysical survey onsite. This <br /> P.O.Box 259 <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />