Laserfiche WebLink
1 r <br /> SECOR <br /> International Incorporated <br /> .-rte <br /> PQ <br /> April 1, 2002 , <br /> Project 77.CH.43582.00.0203 <br /> V-7 <br /> Mr. Sam Savig <br /> San Joaquin County Environmental Health =9 <br /> 304 East Weber Street, 3rd Floor •• Tom', , <br /> Stockton, California 95202 a4 <br /> Re: Site Assessment Report <br /> Chevron Service Station 20-1761 <br /> 1103 South Main Street <br /> Manteca, California <br /> Dear Mr. Savig: <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Products Company <br /> (Chevron), presents this report of assessment activities at the above-referenced Chevron site. <br /> The site assessment activities consisted of the drilling and installation of three groundwater <br /> monitoring wells, under a permit issued by San Joaquin County Public Health Services <br /> (SJCPHS). The purpose of this assessment was to determine if methyl tertiary butyl ether <br /> (MtBE) could be a potential threat to a municipal drinking water supply well (well #13) <br /> located to the southeast of the site (Figure 1). The work was performed in accordance with <br /> SECOR's work plan dated September 19, 2001. Additional activities proposed in the <br /> September 19, 2001 work plan, including cone penetration test (CPT) borings and slug <br /> testing of wells, were not performed. <br /> SITE DESCRIPTION <br /> The site is an operating Chevron service station located in a commercial area of Manteca, <br /> California. The current station facilities include three dispenser islands under a common <br /> canopy, three 12,000 gallon gasoline underground storage tanks (USTs), and a station <br /> building (Figure 2). <br /> ASSESMENT ACTIVITIES AND FINDINGS <br /> On October 18, 2001, a SECOR representative observed Cascade Drilling Incorporated <br /> (Cascade) of Rancho Cordova, California, advance three soil borings to collect soil samples <br /> for chemical analysis at the locations shown in Figure 2. The soil borings were advanced <br /> using 8-inch hollow-stem augers to approximately 31 feet below ground surface (bgs). Upon <br /> completion of drilling, a 2-inch diameter groundwater monitoring well was installed in each <br /> boring. The wells were screened from approximately 5 feet above to 10 feet below first <br /> 3017 Kilgore Road, Suite 100, Rancho Cordova, CA 95670 916.861.0400 916.861.0430 Fax www,secor.com <br />