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' INTRODUCTION <br />' At the request of ExxonMobll Oil Corporation,ETIC Engineering, Inc has prepared this quarterly <br /> groundwater momtonng report for former Exxon Retail Site 7-3942 This report presents the results <br />' for the most recent groundwater momtonng conducted at the site and summarizes recent site <br /> activities This report covers site activities from 28 September 2004,the date of the last monitoring <br /> event, until 3 December 2004, the date of the recent momtonng event The report also presents <br />' results for remediation system monitoring Groundwater monitoring results, well construction <br /> details, a groundwater momtonng 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 /> 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: 1, 2 and 3 December 2004 <br /> I Wells gauged and sampled. IWI,MW2-MW5,MW8,MW10,MW13,RWI,RW2,RW4, <br /> SWI, SW2, WB-MWI, UVB-MW2, Vl-V4 <br /> Wells gauged only: MWI, MW6, 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: I VI, MW13, RW1, RW2, RW4, SWI, SW2, WB-MWI, <br /> WB-MW2, V3, V4 <br /> I Well screens not submerged: MW 1-MW 10, V 1, V2 <br /> Liquid-phase hydrocarbons. Not observed or detected <br /> Laboratory- TestAmenca, Inc ,Nashville, Tennessee <br /> I <br /> w <br /> 95projects1739421maste7�wp1g1204139421mi dm 1 <br />