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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 morutonng conducted at the site and summarizes <br />' recent site activities This report covers site activities from 17 March 2003, the date of the last <br /> monitoring event, until 29 May 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, field data,and analytical results are <br /> provided in the attached appendixes <br /> GENERAL SITE INFORMATION <br />' Site name Farmer 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 /> 1 gasoline) <br /> Number of wells 12 (8 onsite, 4 offsite) <br /> lie <br /> GROUNDWATER MONITORING SUMMARY <br />' Gauging and sampling date 29 May 2003 <br /> Wells gauged and sampled MW1, MW4-MW10, VEW1, VEW3 <br /> Wells gauged only None <br /> Groundwater flow direction. Southeast <br /> Groundwater gradient. 0 002 <br /> Well screens submerged MW1, MW4-MW5 <br /> Well screens not submerged. MW7-MW10, VEW1, VEW3 <br /> Liquid-phase hydrocarbons: Not observed or detected <br />' Laboratory TestAmenea, 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 />' ADDITIONAL ACTIVITIES PERFORMED AT SITE <br /> Joint groundwater monitoring was performed with the environmental consultant for the neighboring <br /> 7-Eleven site <br />' g pro)ects173709Vma ter%wp1g0503\3708tezt doc 1 <br />