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SECOR <br /> .� International Incorporated <br /> March 18, 2002 <br /> i <br /> Project 77CH 92396 00 0101 , A - <br /> Mr Harlin Knoll <br /> San Joaquin County Environmental Health Division <br /> 304 East Weber Avenue, Third Floor S <br /> Stockton, California 95201 '9 <br /> Re Work Plan for Site Assessment <br /> Chevron Service Station 9-2396 <br /> 25651 Highway 99 North <br /> Acampo, California <br /> Dear Mr Knoll <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Products Company <br /> (Chevron), presents this work plan for conducting site assessment activities for drilling and <br /> installing three groundwater monitoring wells at the above-referenced site The purpose of <br /> •, this assessment is to further evaluate the soil and groundwater quality on the site and assess if <br /> methyl tertiary butyl ether (MtBE) is a potential threat to a domestic well located on the west <br /> side of the site (Figure 1) <br /> This work plan includes a brief discussion of site background, a summary of previous <br /> investigations, and a proposed scope of work <br /> SITE BACKGROUND AND PREVIOUS INVESTIGATIONS <br /> The site is an active service station located at 25651 Highway 99 North in Acampo, San <br /> Joaquin County, California <br /> Site investigation information is summarized in Attachment A <br /> PROPOSED SCOPE OF WORK <br /> The scope of work for this site assessment will include the dnlling and installation of three <br /> groundwater monitoring wells at the general locations shown on Figure 2 <br /> The specific scope of work is discussed below <br /> • Groundwater Monitoring Wells. Three soil borings will be advanced at the <br /> locations shown on Figure 2 using 8-inch diameter hollow-stem augers to a depth of <br /> approximately 80 feet bgs Groundwater is expected to be encountered at an <br /> approximate depth of 70 feet bgs Upon completion of drilling, a 2-inch diameter <br /> groundwater monitoring well will be installed in each bonng The wells will be <br /> screened from approximately 5 feet above to 10 feet below first encountered <br /> groundwater <br /> 3017 Kilgore Roam, Suite 100, Rancho Cordova, CA 95670 916 861 0400 916 861 0430 Fax www secor Com <br />