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INTRODUCTION <br /> • <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 3 December 2004, the date of the last <br /> monitoring event, until 23 March 2005, 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 /> 1 <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- 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 /> in <br /> Gaug g ansampling d date: 23 March 2005 <br /> P g <br /> Wells gauged and sampled: MW1, MW4-MW10, VEW1, VEW3 <br /> Wells gauged only: None <br /> Groundwater flow direction: Southeast <br />' Groundwater gradient: 0 003 <br /> Well screens submerged: MW 1, MW4-MW7 <br /> Well screens not submerged: MW8-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-dibromo ethane, 1,2-dichloroethane, diisopropyl ether, and ethanol by EPA Method <br />' 8260B <br />' 9�Pr0J=Uk73708\n=crl"*30"70&md&c 1 <br />