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' 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 17 September 2003,the date of the Iast monitoring
<br /> event, until 8 December 2003, 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 monitonng 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 /> 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 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)
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<br /> GROUNDWATER MONITORING SUMMARY
<br /> Gauging and sampling date: 8 December 2003
<br /> Wells gauged and sampled. IW1,MW2-MW5,MW8,MW10,MW13,RW1,RW2, RW4,
<br /> SWI, SW2, UVB-MW1, UVB-MW2, V1-V4
<br /> Wells gauged only: MW I, MW6, MW7, MW9
<br /> I 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, MW13, RW1, RW2, RW4, SWI, SW2, UVB-MW1,
<br /> VB-MW2, V3, V4
<br /> IWell screens not submerged MW1-MW10, V1, V2
<br /> Liquid-phase hydrocarbons Observed in UVB-MW 1,V2,and V4 at a thickness of 0 01 feet
<br /> ILaboratory TestAmenca, Inc , Nashville, Tennessee
<br /> _Vpi1q11r,%7 p,q 120%0-11r-n dna
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