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cF z <br /> 1 <br /> SECOR <br /> . International Incorporated <br /> r <br /> October 29, 2001 <br /> Project 077 43512 271 <br /> Mr Mike Infurna <br /> San Joaquin County Environmental Health Division <br /> 304 East Weber Street, 3rd Floor <br /> Stockton, CA 95202 <br /> Re Results of Site Assessment and Well Abandonment <br /> Chevron Station #9-6171 <br /> 6633 Pacific Avenue <br /> Stockton, California <br /> Dear Mr Infurna <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Products Company <br /> (Chevron), presents this report of results of site assessment activities performed at the above- <br /> referenced site (Figure 1) Site assessment activities consisted of the drilling and installation <br /> of three shallow onsite groundwater monitoring wells, drilling and installation of one deep <br /> onsite groundwater monitoring well, drilling and installation of three shallow offsite <br /> groundwater monitoring wells, and the abandonment of onsite well OW-1 The purpose of <br /> this assessment was to further define the horizontal and vertical extent of petroleum <br /> hydrocarbons in groundwater at and downgradient of the site, and to properly abandon well <br /> OW-1 <br /> SITE BACKGROUND AND PREVIOUS INVESTIGATIONS <br /> The subject site is located at the intersection of Pacific Avenue and Benjamin Holt Drive in <br /> Stockton, California The site is currently an operating Chevron service station The former <br /> and current site features are shown in Figure 2 A summary of the site background and <br /> previous investigation activities is included in Attachment A <br /> ASSESSMENT ACTIVITIES AND FINDINGS <br /> In March and June 2001, SECOR contracted and supervised Gregg Drilling and Testing, Inc <br /> (Gregg) to drill and install four on-site wells including one deep well, drill and install three <br /> off-site wells, and abandon existing well OW-1 Field and laboratory procedures are <br /> presented in Attachment B The assessment findings are summarized below <br /> • <br /> 3017 Kilgore Road, Suite 100, Rancho Cordova, CA 95670 916 861 0400 916 861 0430 Fax www secor com <br />