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i <br /> INTRODUCTION <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 3 December 2004, the date of the last monitoring <br /> event, until 24-25 March 2005, the date 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 /> GENERAL SITE INFORMATION <br /> Site name: Former Exxon Retail Site 7-3942 <br /> ISite 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 /> i Number of wells 33 (25 onsite, S offsite) <br /> GROUNDWATER MONITORING SUMMARY <br /> Gauging and sampling date: 24 and 25 March 2005 <br /> Wells gauged and sampled. IWI, MWI-MWI1,MW13,RWI,RW2, RW4, SW1, SW2, <br /> UVB-MW1, UVB-MW2, V1-V4 <br /> i Wells gauged only: None <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: IWI,MW11,MW13, RW1, RW2, RW4, SWI, SW2,UVB- <br /> iMW 1, UVB-MW2, V I-V4 <br /> Well screens not submerged: MW 1-MW 10 <br /> i Liquid-phase hydrocarbons Not observed or detected <br /> Laboratory: TestAmenca, Inc , Nashville, Tennessee <br /> i <br /> iglprcJccts173942\j=tcrlwp1g0305139421cxt doe 1 <br />