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Ile INTRODUCTION <br />' At the request of ExxonMobil Refining and Supply Company, ETIC Engineering, Inc has prepared <br /> this quarterly groundwater monitoring report for former Exxon Retail Site 7-3708 This report <br /> presents the results for the most recent groundwater monitoring conducted at the site and summarizes <br />' recent site activities This report covers site activities from 23 September 2002, the date of the last <br /> morutonng event, until 6 December 2002, the date of the recent monitoring event Groundwater <br /> monitoring results,well construction details,and a groundwater monitoring plan are provided in the <br />' attached figures and tables Groundwater monitoring protocols, field data, and analytical results are <br /> provided in the attached appendixes <br /> IGENERAL SITE INFORMATION <br /> ISite name- Former Exxon Retail Site 7-3708 <br /> Site address: 2705 Country Club Boulevard, Stockton, California <br /> Current property owner: Palisades Gas & Wash, Inc <br /> Current site use: Active USA-branded station operated by U S A Petroleum <br /> Current phase of project: Groundwater monitoring, well surveying <br />' Tanks at site: Two underground storage tanks (diesel fuel, unleaded <br /> gasoline) <br /> Number of wells: 12 (8 onsite, 4 offsite) <br /> GROUNDWATER MONITORING SUMMARY <br /> Gauging and sampling date: 6 December 2002 <br /> Wells gauged and sampled- MW1, MW4-MW10, VEW1, VEW3 <br />' Wells gauged only: None <br /> Groundwater flow direction: Northeast <br /> Groundwater gradient: 0 001 <br />' Well screens submerged- MW1, MW4-MW8 <br /> Well screens not submerged: MW9, MW10, VEW1, VEW3 <br /> Liquid-phase hydrocarbons: Not observed or detected <br /> Laboratory TestAmenca, Inc , Nashville, Tennessee <br /> Analyses performed• <br />' • Total Petroleum Hydrocarbons as gasoline by EPA Method 8015B <br /> • Benzene, toluene, ethylbenzene, and total xylenes by EPA Method 8021B <br /> • Methyl t-butyl ether, ethyl t-butyl ether, t-amyl methyl ether, t-butyl alcohol, <br /> 1,2-dibromoethane, 1,2-dichloroethane, and diisopropyl ether by EPA Method 8260B <br />' S�Pm1Ms17370M=sra�wp1gI202ti3708tcxt da 1 <br />