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G�3�C�C��][� o <br /> C A M B R I A JUL 2920OZ <br /> ENVIRONMENT HEALTH July 24, 2002 <br /> PERMIT/SERVICES <br /> Mr Jeffrey Wong �r / v MIA I <br /> San Joaquin County Environmental Health Department /1 C� 1 <br /> 304 East Weber Avenue, Third Floor , M 1-U <br /> Stockton, California 95202 <br /> Re Groundwater Monitoring Report - Second Quarter 2002 <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 /> Cambna 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 /> pe SECOND QUARTER 2002 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 a groundwater flow direction data table (Table 1), <br /> an oxygenate and lead scavenger data table (Table 2), a site vicinity/well survey map (Figure 1), <br /> and a groundwater contour/chemical concentration map (Figure 2) Blaine's report, presenting <br /> the laboratory report, is included as Appendix A <br /> Cambria submitted a Site Investigation Report and Site Conceptual Model on April 18, 2002 <br /> Cambria also subinitted a Site Investigation 'W6rk'Plan on' June 5, 2002 and an Interim <br /> Remediation Work Plan on June 21, 2002 Cambna received San Joaquin County Environmental <br /> Health Department's (SJCEHD's) June 25, 2002 letter approving the June 5, 2002 Site <br /> Oakland CA Investigation Work Plan and requesting the installation of one deep groundwater monitoring <br /> San Ramon CA well Cambna concurs that additional deep groundwater Sampling is warranted However, we <br /> Sonoma CA would like to further assess the lateral of extent of the groundwater plume prior to choosing a <br /> canbria location for a deep groundwater monitoring well This additional groundwater data will be <br /> Environmental obtained during the upcoming phase of investigation at the site, and Cambria will propose a deep <br /> technology,Inc groundwater monitoring well in the subsequent site investigation report <br /> Perkins Street <br /> P 6 Sox 2$9 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />