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' INTRODUCTION <br /> • <br />' At the request of ExxonMobil Oil Corporation, ETIC Engineering,Inc has prepared this quarterly <br /> groundwater monitoring report for former Exxon Retail Site 7-3942 This report presents the results <br /> for the most recent groundwater monitoring conducted at the site and summarizes recent site <br />' activities This report covers site activities from 24-25 March 2005,the dates of the last monitoring <br /> event, until 22-23 June 2005, the dates of the recent monitoring event The report also presents <br />' results for remediation system monitoring Groundwater monitoring results, well construction <br /> details, a groundwater monitoring plan, and system monitoring results are summarized in the <br /> attached figures and tables Groundwater monitoring protocols, field data,and analytical results are <br />' provided in the attached appendixes <br /> I <br /> GENERAL SITE INFORMATION <br /> 1 <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: 33 (25 onsite, 8 offsite) <br />' GROUNDWATER MONITORING SUMMARY <br />' Gauging and sampling date: 22 and 23 June 2005 <br /> Wells gauged and sampled. IWI,MW2-MW6,MW8,MW 10,MW 13,RW 1,RW2,RW4, <br /> SW1, SW2, WB-MW1, UVB-MW2, V1-V4 <br />' Wells gauged only: MW1, MW7, MW9 <br /> Groundwater flow direction. Northeast <br /> Groundwater gradient: 0 005 <br />' Remediation system status during <br /> groundwater monitoring event: UVB system not operating <br /> Well screens submerged: 1W1, MW13, RW1, RW2, RW4, SW1, SW2, WB-MW1, <br />' WB-MW2, V1-V4 <br /> Well screens not submerged MW1-MW10 <br /> Liquid-phase hydrocarbons: Not observed or detected <br />' Laboratory. TestAmenca, Inc , Nashville, Tennessee <br /> I <br />' 9 lprojccuV73942\rn=cTiwpW605139421cxt doc 1 <br />