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r <br /> r <br /> CAM R A <br /> August 14, 2003 <br /> Mr Mike Infurna <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Street,Third Floor <br /> Stockton,California 95202 IDLnDI <br /> ���>��� 1�� �' <br /> Re Site Conceptual Model <br /> Shell-branded Service Station AUG 203 <br /> 2494 East Fremont Street ENVIRNIMENT HEALTH <br /> Stockton, California PERMIT/SERVICES <br /> SAP Code 136141 <br /> Incident No 98996181 <br /> SJCEHD Site 506171 <br /> Dear Mr Infurna <br /> Cambria Environmental Technology, Inc (Cambna) prepared this document on behalf of <br /> Equilon Enterprises LLC dba Shell Oil Products US (Shell) This document was requested by <br /> the San Joaquin County Environmental Health Department(EHD) in their May 21, 2003 letter to <br /> Shell <br /> SITE CONCEPTUAL MODEL <br /> A site conceptual model (SCM) was prepared for this site and is presented as Table 1 In <br /> addition to our standard SCM, EHD requested some additional items be included with our <br /> document These items are discussed below and are followed by our conclusion <br /> Receptor Information <br /> Cambria performed a sensitive receptor survey in 2001 and reported the findings of this survey in <br /> our October 10, 2001 Site Investigation Report The survey included research of well records <br /> from the Department of Water Resources (DWR) for wells within a 2,000 foot radius of the site, <br /> a 250 foot radius door-to-door well survey, and research to locate surface water bodies within <br /> Oakland CA 2,000 feet of the site The wells located during this survey are plotted on Figure 1 The findings <br /> Sonoma CA <br /> Portland OR of the well survey are discussed in the SCM(Table 1)and are summarized on Table 2 1 <br /> Seattle WA <br /> Site Maps <br /> Cambria <br /> Environmental <br /> nology,Inc We generated a series of site maps to depict site features, boring and well locations, and to show <br /> the estimated extent of contaminants of concern Figure 2 presents the general layout of the site, <br /> 270 Perkins Street <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(7o7)935-6649 <br />