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t ry <br /> C A M B R I A <br /> October 16, 2001 <br /> Mr Michael 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 - Third Quarter <br /> Shell-branded Service Station <br /> 2575 Country Club Boulevard <br /> Stockton, California <br /> SAP Code 136144 <br /> Incident No 98996184 <br /> Dear Mr Infurna <br /> Cambria Environmental Technology, Inc (Cambna) prepared this report on behalf of Equiva <br /> Services LLC in accordance with quarterly reporting guidelines issued by the Central Valley <br /> Regional Water Quality Control Board and San Joaquin County Public Health Services <br /> (SJCPHS) <br /> THIRD QUARTER 2001 ACTIVETIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled the wells and <br /> prepared a summary table of field gauging data and gasoline constituents Cambria compiled the <br /> additional constituents and oxygenates (Table 1), prepared a site vicinity map (Figure 1), and a <br /> groundwater contourlchermcal concentration map (Figure 2) Blaine's report, presenting the <br /> laboratory report, is included as Appendix A <br /> DOMESTIC WELLS <br /> TPHg, benzene, MTBE, and fuel oxygenates were not detected in the groundwater samples <br /> Oakland CA collected from any of the off site water supply wells except for the CalTrans well Toluene and <br /> San Raman CA xylenes were detected in the CalTrans well at concentrations of 17 and 14 parts per billion <br /> Sonoma c A (ppb), respectively The laboratory analytical results are summarized in the table in Blaine's <br /> Portland OR <br /> monitoring report (Appendix A) and also on Table i <br /> Cambna <br /> Environmental <br /> Technology,Inc <br /> *eTkins street <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />