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i <br />PACIFIC <br />ENVIRONMENTAL <br />GROUP INC. <br />December 8, 1997 <br />Project 920-124.1A <br />Mr. Ronald Rowe <br />San Joaquin County Public Health Services <br />Environmental Health Division <br />304 East Weber Avenue, Third Floor <br />Stockton, California 95202 <br />Re: Work Plan for Site Assessment Activities <br />Chevron Station #9-2033 <br />508 West Charter Way <br />Stockton, California <br />Dear Mr. Rowe: <br />C"1 <br />R <br />tF�r—r <br />DEC 0 9 1997 <br />LNVIH',:j iie"icy'fTALHEALTH <br />PERMIT / SERVICES <br />This letter, prepared by Pacific Environmental Group, Inc. (PACIFIC) on behalf of <br />Chevron Products Company (Chevron), presents a work plan for the site assessment <br />activities at the above site (Figures 1 and 2). This work plan has been prepared in <br />response to your letter, dated October 10, 1997. <br />As you indicated during our telephone conversation, the subject site is likely within an <br />area underlain by a commingled plume resulting from other documented releases <br />surrounding the site. The purpose of the work proposed in this work plan is to <br />investigate the vertical extent of previously reported hydrocarbons in soil and <br />groundwater in the potential source areas on the subject site. This information <br />combined with a file review and records research performed for the subject site and a <br />review of County's files of work performed for the nearby sites will be utilized to <br />determine the need for additional investigative work onsite and Chevron's relative <br />contribution to the existing hydrocarbon plume(s) beneath the site area. <br />This work plan includes a brief discussion of site background, previous investigations, <br />proposed scope of work, and schedule. Field and laboratory procedures are outlined in <br />Attachment A. <br />SITE BACKGROUND AND PREVIOUS INVESTIGATIONS <br />The site is an former Chevron Service Station located in a primarily commercial area at <br />the intersectioit of West Charter Way and South Lincoln Street in Stockton, California. <br />An operating Texaco Service Station is located directly east of the site (across Lincoln <br />Street) and an operating ARCO Service Station is located across the intersection to the <br />11315 Sunrise Gold Circle, Suite M, Rancho Cordova, California 95742 (916) 858-2350 FAX (916) 858-2355 <br />