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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 7-3942 This report <br /> presents the results for the most recent groundwater monitoring conducted at the site and su imanzes <br />' recent site activities This report covers site activities from 10 September 2002, the date of the last <br /> monitoring event,until 18 December 2002, the date of the recent monitoring event The report also <br /> presents results for remediation system monitoring Groundwater monitoring results, well <br />' construction details,a groundwater monitoring plan, and system monitoring results are surnmanzed <br /> in the attached figures and tables Groundwater monitoring protocols, field data, and analytical <br /> results are provided in the attached appendixes <br /> 1 <br />' GENERAL SITE INFORMATION <br /> Site name: Former Exxon Retail Site 7-3942 <br />' Site address: 4444 North Pershing Avenue, Stockton, California <br /> Current property owner. Edna I Filippi Family LP <br /> Current site use Vacant lot <br />' Current phase of project: Groundwater monitoring <br /> Tanks at site Four former underground storage tanks(used oil,three grades <br /> of gasoline) removed July 1986 <br /> Number of wells: 30 (22 onsite, 8 offsite) <br />' GROUNDWATER MONITORING SUMMARY <br /> Gauging and sampling date. 18 December 2002 <br />' Wells gauged and sampled IW1, MW2-MW5, RW1, RW2, RW4, V1-V4, UVB-MW1, <br /> WB-MW2 <br /> Wells gauged only- MW1, MW6, MW7, MW9, MW13 <br />' Groundwater flow direction* Northeast <br /> Groundwater gradient: 0 004 <br /> Remediation system status during <br />' groundwater monitoring event UVB system not operating <br /> Well screens submerged: IW 1, MW 13, RW 1, RW2, RW4, V1-V4, UVB-MWI, <br /> UVB-MW2 <br />' Well screens not submerged MW1-MW7, MW9 <br /> Liquid-phase hydrocarbons. Not observed or detected <br /> Laboratory TestAmenca, Inc , Nashville, Tennessee <br />' 9%Projccts1739421mnstcrlwp�g F2O213942text dm ' 1 <br />