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` Ur <br /> RECE V EV <br /> F F B 17 2004 <br /> ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> February 13, 2004 <br /> Ms. Vicki McCartney,'REHS 2186 <br /> Unit IV-Site Mitigation 06.a4 <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202-2708 <br /> Re: Work Plan for Groundwater Monitoring <br /> and Remediation Well Installation <br /> ARCO Station No.2186 <br /> 3212 North California Street <br /> Stockton,California 95204 <br /> Dear Ms. McCartney: 4"P.- <br /> On <br /> P"-On behalf of Atlantic Richfield Company (ARCO — a BP affiliated company), URS Corporation <br /> Americas (URS) has prepared this work plan for the installation of one deep groundwater monitoring <br /> well, one soil vapor extraction well, and 10 air sparging wells at the site referenced above (Figure 1). <br /> This work plan has been prepared at the request of the San Joaquin County Environmental Health <br /> Department (SJCEHD) in their letter dated November 17, 2003 (Attachment A). The SJCEHD letter-- <br /> requested a work plan to better define the hydrogeology of the site and to delineate the vertical extent of <br /> petroleum hydrocarbon impacts in the underground storage tank (UST) area. This work plan also <br /> addresses the scope .and details of remediation well installation activities proposed by URS in the <br /> Interim Remediation Work Plan, dated January 7, 2004. The following 'pages present the ,site ._ <br /> background and the proposed scope of work. <br /> SITE BACKGROUND <br /> The site is located on the corner of North California Street and Alpine Street in Stockton, California, as <br /> shown on Figures 1 and 2. The locations of the existing UST cavity,'dispenser islands,and other select <br /> site features are shown on Figure 2. The site currently operates as a gasoline service station and mini- <br /> mart. Facilities include two 20,000-gallon, double-wall fiberglass gasoline USTs with associated <br /> product lines and two dispenser-islands (Figure 2). <br /> URS Corporation <br /> Crown Corporate Center <br /> 2870 Gateway Oaks Drive, Suite 300 <br /> Sacramento,CA 95833 <br /> Tel:916,679.2000 <br /> Fax:916.679.2900 KAWprocessV 5 BP ARC0102]86\2 E 86'WP 04.doc <br />