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CAAABR9A <br /> NOV 2 1 2002 <br /> ENVIRORMENI HEALTWovember 19, 2002 <br /> Mr. Michael Infuma PERMIT/SERVICES <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re: Response letter/Site Conceptual Model/Site Pnvestigation Work PIan <br /> Former Shell Service Station <br /> 1267 Country Club Boulevard <br /> Stockton, California <br /> SAP Code 129480 <br /> Incident No. 97093419 <br /> SJCEHD Site Code 505602 <br /> Dear Mr. Infurna: <br /> Cambria Environmental Technology, Inc. (Cambria) prepared this work plan on behalf of <br /> Equilon Enterprises LLC dba Shell Oil Products US (Shell) in response to San Joaquin County <br /> Environmental Health Department's (SJCEHD's) September 20, 2002 letter. In addition to the <br /> work plan, this letter also responds to comments in the SJCEHD letter and includes a site <br /> conceptual model. The scope of work presented in this work plan complies with SJCEHD and <br /> Regional Water Quality Control Board(RWQCB)guidelines. <br /> S37 2 DESCRIPTION ANN SACKGROU.ND <br /> Site location and Description <br /> The subject property is located on the northeast corner of the intersection of Country Club <br /> Boulevard and Pershing Avenue in a mixed commercial and residential area of Stockton, <br /> California (Figure 1). The subject site is presently occupied by Premier Community Credit <br /> Union. The site was developed in 1949 as a Shell-branded service station, which ceased <br /> operation in 1974. A total of four fuel underground storage tanks (USTs) and one waste oil UST <br /> were operated as part of this service station. The approximate locations of these tanks are shown <br /> on Figure 2. <br /> Oakland, CA <br /> San Ramon, CA <br /> Son oma, CA Previous Work <br /> Cambria 1995 Sail Borings: During April 1995, Geosystem Consultants, Inc. (Geosystem) of Irvine, <br /> Environmental <br /> Technology,Inc. California drilled eight soil borings (B-1 through B-8). Soil samples were collected from all the <br /> borings and groundwater samples were collected from three of the borings (B-2, B-3, and B-6). <br /> erkins Street <br /> P.O.Box 259 <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />