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C A M B R I A <br /> August 13,2003 <br /> Mr. Mike Infurna <br /> San Joaquin County Environmental Health Department _ <br /> 304 East Weber Street,Third Floor R E"I���ED <br /> Stockton, California 95202 <br /> Re: July 28, 2003 Meeting <br /> AUG 15 2003 <br /> Shell-branded Service Station ENVIRONMENT HEALTH <br /> 2494 East Fremont Street PERMIT/SERVICES <br /> Stockton,California <br /> SAP Code 136141 <br /> © Incident No. 98996181 <br /> SJCEHD Site 506171 <br /> Dear Mr. Infurna: <br /> Thank you for meeting with us on July 28, 2003 to discuss this site. Cambria Environmental <br /> Technology, Inc. (Cambria) is writing this letter on behalf of Equilon Enterprises LLC dba Shell <br /> Oil Products US(Shell)to document matters discussed during the meeting. <br /> During the meeting, San Joaquin County Environmental Health Department (EHD) requested <br /> that Shell analyze groundwater samples from all site monitoring wells quarterly for all seven <br /> oxygenates (methyl tertiary butyl ether, tertiary butyl alcohol, ethyl tertiary butyl ether, tertiary <br /> amyl ether, di-isopropyl ether, methanol, and ethanol) and for lead scavengers (ethylene <br /> dibromide and dichloroethane) in addition to the normal TPHg and BTEX analysis. We had <br /> previously stopped quarterly analysis of all of the above compounds because they were not <br /> detected in groundwater. Analysis for these compounds was reinitiated based on the EHD letter <br /> dated June 24, 2002, where we were directed to do oxygenate and lead scavenger analyses in all <br /> site wells at least once per year. Based on the verbal directive in the meeting, we have <br /> incorporated quarterly sampling of all the oxygenates and lead scavengers in the site sampling <br /> program and this will take effect during the third quarter 2003 sampling event. <br /> EHD asked Shell to propose a new due date for the Site Conceptual Model (SCM) and for the <br /> Oakland, C A site investigation work plan. On July 29, 2003 we proposed the due date for the SCM be August <br /> Sonoma, CA <br /> Portland, OR 15, 2003, and the due date for the work plan be August 29, 2003. EHD verbally approved these <br /> Seattle, WA due dates. In addition, Cambria requested a file review date of August 20, 2003 to review EHD <br /> files for sites within their jurisdiction that have ongoing 1,2-DCA contamination cases. <br /> Cambria <br /> Environmental <br /> Technology,Inc. During our meeting, EHD inquired as to why Shell is reluctant to investigate for 1,2-DCA as <br /> directed to do so by EHD, but when asked to do 1,2-DCA investigations by the Central Valley <br /> 270 Perkins Street <br /> P.O.Box 259 <br /> Sonoma,CA 95476 <br /> Tel(7o7)935-4850 <br /> Fax(7o7)935-6649 <br />