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CAMBRIA <br /> r n r r r• ^, <br /> - V J <br /> April 19, 2001 <br /> Mr Jeffrey Wong <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 — First Quarter 2001 <br /> Former Shell Service Station <br /> 880 Victor Road <br /> Lodi, California <br /> SAP Code 135446 <br /> Incident No 98995526 <br /> SJCPHSIEHD Site Code 1746 <br /> Dear Mr Wong <br /> Cambria Environmental Technology, Inc (Cambria) prepared this report on behalf of Equiva <br /> Services LLC (Equiva) in accordance with quarterly reporting guidelines issued by the Central <br /> Valley Regional Water Quality Control Board and San Joaquin County Public Health Services, <br /> . Environmental Health Division (SJCPHS/EHD) <br /> FIRST QUARTER 2001 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled all site wells <br /> and prepared a summary table of field gauging data and gasoline constituents (Appendix A) <br /> Cambria compiled the oxygenate and lead scavenger data (Table 1), prepared a site vicinity <br /> map (Figure 1)� and prepared a groundwater contour/chemical concentration iiaP (Figure 2 <br /> ) <br /> Blaine's report, presenting the laboratory report, is included as Appendix A <br /> ANTICIPATED SECOND QUARTER 2001 ACTIVITES <br /> Blaine will gauge and sample the site wells according to the existing sampling schedule and <br /> tabulate the data Cambria will prepare a groundwater monitoring report <br /> Oakland, C A CONCLUSIONS AND RECOMMENDATIONS <br /> San Ramon CA <br /> Sonoma CA <br /> Groundwater flow direction this quarter is southeasterly Past monitoring events, indicate <br /> cambna that the groundwater gradient is very flat and flow direction fluctuates beneath the site <br /> Environmental <br /> Technology, Inc Methyl tertiary butyl ether concentrations in the three wells this quarter are generally <br /> consistent with historical data Tertiary butanol and tertiary amyl methyl ether were also <br /> erkms Street <br /> P 0 Box 259 <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />