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i L1 SECOR\mp� vuww.secor.com <br /> INTERNATIONAL 3017 Kilgore Road,Suite 100 <br /> S C O INCORPORATED Rancho Cordova,CA 95670 <br /> 916-861-0400 TEL <br /> 916-861-0430 FAX <br /> May 22, 2007 <br /> FCC <br /> Ms. Lori Duncan MAY4. %CC7 � � <br /> San Joaquin County I Mw-10 <br /> Environmental Health Department I <br /> 600 E. Main Street PERfA!T1SERv'i lac, <br /> Stockton, California 95202 dA&+ <br /> 046 r <br /> C4 AVO wtV IM <br /> RE: Work Plan for Additional Assessment and Well Abandonment ``` ' ° "^a <br /> Commingled Plume Site No. 34 0'fe" ^^a f07 P& <br /> ARCO Service Station No. 2133 and Chevron Service Station No. 9-4275 <br /> 2905 and 2908 West Benjamin Holt Drive <br /> Stockton, California <br /> SECOR Project No.: 77BP.02133.09.0002 <br /> Dear Ms. Duncan: <br /> This document, prepared by SECOR International Incorporated (SECOR) on behalf of Atlantic <br /> Richfield Company (ARC), a BP Affiliated Company, presents a work plan for assessing <br /> contamination in soil and groundwater assessment at the above-referenced sites (Figure 1). <br /> Following the request in your letter dated August 1, 2005 to install offsite shallow monitoring well <br /> MW-10 SECOR attempted to gain an offsite access agreement. In April 2007 SECOR acquired <br /> the offsite access agreement (Attachment A). MW-10 was proposed in the SECOR Work Plan <br /> for Soil and Groundwater Delineation and Addendum to Work plan for Well Destruction and <br /> UST Removal which was submitted May 27, 2005. This document updates the work plan to <br /> install one offsite groundwater monitoring well (MW-10), north of the site and also presents a <br /> work plan to properly abandon one offsite groundwater monitoring well (MW-4) south of the <br /> ARCO service station. <br /> This work plan contains a site description and details the scope of work proposed for the site <br /> assessment. <br /> SITE DESCRIPTION <br /> The ARCO 2133 facility and the Chevron 9-4275 facility are located at the western intersection <br /> of Benjamin Holt Drive and Plymouth Road in Stockton, California. The site is located in a light <br /> commercial/residential area of Stockton in a relatively flat lying area. The ARCO 2133 facility is <br /> an operating service station with an AM/PM mini-mart that retails gasoline fuel with four <br /> underground storage tanks (USTs) and associated product lines and dispensers. Chevron 9- <br /> 4275 is an operating service station which features include two double-walled, fiberglass USTs, <br /> a station building, six product dispensers under a common canopy, and a car wash. <br />