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1 INTRODUCTION <br /> At the request ofExxonMobil 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 monitonng conducted at the site and summarizes recent site <br />' activities This report covers site activities from 8 December 2003, the date of the last monitoring <br /> event, until 2 March 2004, the date of the recent monitoring event The report also presents results <br /> for remediation system monitoring Groundwater monitoring results, well construction details, a <br />' groundwater monitoring plan, and system monitoring results are summarized in the attached figures <br /> and tables Groundwater monitoring protocols, field data, and analytical results are provided in the <br /> attached appendixes <br /> GENERAL SITE INFORMATION <br />' Site name. Former - <br /> Exxon Retail Site 7-3942 <br />' Site address: 4444 North Pershing Avenue, Stockton, California <br /> Current property owner: Edna I Filippa Family LP <br /> Current site use: Vacant lot <br />' Current phase of protect. 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 2 March 2004 <br /> Wells gauged and sampled. IW1,MWI-MWS,MW7-MW11,MW13,RWl,RW2,RW4, <br /> SWI, SW2, WB-MWI, UVB-MW2, VI-V4 <br /> Wells gauged only. MW6 <br /> Groundwater flow direction: Northeast <br /> Groundwater gradient 0 005 <br /> Remediation system status during <br /> groundwater monitoring event. WB system not operating <br /> Well screens submerged IWI, MW11, MW13, RW1, RW2, RW4, SW1, SW2, UVB- <br /> MWI, UVB-MW2, V1-V4 <br /> Well screens not submerged- MWI-MW10 <br /> Liquid-phase hydrocarbons. Not observed or detected <br /> Laboratory TestAmerica, Inc , Na4iville, Tennessee <br /> • <br /> I <br />' 9\Prolects173942Unasttcrlwp\gO3D43942tc\t dnc 1 <br />