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µ 19449 Riverside privet Suite 230, Sonoma, California 95476 # <br /> CONESTOGA-ROVERS K Telephone: 707935.4850 Facsimile: 707.9356649 - <br /> &ASSOCIATES www.CRAworld"com �F <br /> x <br /> April 26, 2007 <br /> s <br /> Mr.Harlin Knoll - <br /> San Joaquin County Environmental Health Department_ <br /> 600 East Main Street = <br /> Stockton,California 95202. <br /> Re: Case Closure�Summary <br /> Shell-branded Service Station <br /> 3725 Tracy Boulevard <br /> Tracy, California' <br /> SAP Code 136186. <br /> Incident No. 98996222 y ; <br /> Dear Mr. Knoll: <br /> Conestoga-Rovers & Associates{CRA}prepared this document on behalf of Equilon'Enterprises, <br /> LLC dba Shell Oil Products US (Shell).. -This summary follows Appendix A of the Central <br /> Valley Regional Water'Quality Control.Board (CVRWQCB) document, Tri-Regional`Board . <br /> Staff Recommendations for Preliminary Investigation and Evaluation of Underground Tank <br /> Sites, dated April 16, 2004:: The summary was prepared to facilitatecase closure review for this <br /> site. A summary of'tlie site background; site conditions, and°a discussion of the CVRWQCB .,,k... <br /> Checklist of Required-Data for No Further.Action Requests'at'Underground Tank Sites are . <br /> presented below, along with a vapor,intri Sion analysis for.the subject°site. <br /> SITE DESCRIPTION { <br /> i <br /> The subject site is 'located on the northwest corner of Tracy Boulevard and:the on-ramp to <br /> Highway 205, in a mixed commercial/residential area of Tracy, California{Figure 1). The site is <br /> a <br /> currently an operating Shell-branded Service-Station.,, The site layout includes one station <br /> building with an attached`car wash, "four 'fuel underground storage °tanks -(USTs), and six <br /> dispenser islands(Figure 2). <br /> PREVIOUS WORK a <br /> Figures 2 and 3 show-historical soil sampling locations for the site. . Table -1 summarizes <br /> available boring and well construction information. Available historical soil analytical data-are <br /> summarized on Table 2; and historical grab groundwater.data are summarized on Table 3. I <br /> t <br /> Equal <br /> Employment I <br /> 6ppartunityEmployer <br /> r - Worldwide Engineering,Environmental,Construction,and IT Services - <br />