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w9 sk <br /> C A M B R I A L1 1l7kCN111Pi P1f <br /> 1� t ,i-!�T SIfi V <br /> 03 MAY €5 PM 12= 05 May 13, 2003 <br /> Mr Jeffrey Wong <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 2003 <br /> Former Shell Service Station/Econo Gas <br /> 880 Victor Road �-- <br /> Lodi, California <br /> SAP Code 135446 '��— <br /> Incident No 98995526 <br /> SJCEHD Site Code 1746 <br /> Dear Mr Wong <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 2003 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled all site wells and <br /> prepared a summary table of field gauging data and petroleum hydrocarbon and methyl tertiary <br /> butyl ether concentrations Cambria prepared an oxygenate and lead scavenger data table <br /> (Table 1), a site vicinity/well survey map (Figure 1), and a groundwater contour/chenucal <br /> concentration map (Figure 2) Blaine's report, presenting the laboratory report, is included as <br /> Appendix A <br /> 4 <br /> In previous groundwater monitoring reports, Cambria included a table of groundwater flow <br /> directions and a rose diagram showing historical groundwater flow directions, because the <br /> groundwater flow direction at the site was highly variable Since additional site wells were <br /> installed during third quarter 2002, a predominant southeasterly groundwater flow direction has <br /> Oakland CA emerged Therefore Cambria will no longer prepare the groundwater flow direction table or rose <br /> San Ramon CA diagrams <br /> Sonoma CA <br /> Cambria Cambria received San Joaquin County Environmental Health Department's (SJCEHD's) <br /> Environmental March 21, 2003 letter requesting an interim remediation work plan addendum, a full 8260B scan <br /> Technology,Inc with all peaks reported, and that Shell analyze split samples to conduct a study of sample <br /> OeTkins Street preservatives <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />