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t <br /> i <br /> • 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 18 September 2003, the date of the last <br />' monitoring event, until 9 December 2003, 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, held data, and analytical results are <br />' provided in the attached appendixes <br />' GENERAL SITE INFORMATION <br /> Site 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: Joint groundwater monitoring <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 /> I Gauging and sampling date: 9 December 2003 <br /> Wells gauged and sampled- MW 1, MW4-MW 10, VEW 1 <br /> Wells gauged only: VEW3 <br /> I Groundwater flow direction. Northeast <br /> Groundwater gradient: 0 001 <br /> Well screens submerged: MW1, MW4-MW6 <br /> I Well screens not submerged: MW7-MW 10, VEW 1, 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 /> IAdditional comments <br /> Well VEW3 was dry on 9 December 2003 <br /> IS+pig]misk73708U=terlwp\gl243\370Stextdoe 1 <br />