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' INTRODUCTION <br /> • <br />' At the request of ExxonMobil Refining and Supply Company,ETIC Engineering,Inc has prepared <br /> this quarterly groundwater monitonng report for former Exxon Retail Site 7-3942 This report <br /> presents the results for the most recent groundwater monitoring conducted at the site and summanzes <br /> t recent site activities This report covers site activities from 24-25 March 2003, the date of the last <br /> monitoring event, until 11 June 2003, the date of the recent monitoring event The report also <br /> presents results for remediation system monitoring Groundwater monitoring results, well <br />' construction details, a groundwater monitoring plan,and system monitoring results are summarized <br /> in the attached figures and tables Groundwater monitoring protocols, field data, and analytical <br /> results are 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 /> t 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) <br /> GROUNDWATER MONITORING SUMMARY <br />' <br /> Gauging and date- 11 June 2003 <br /> g g sampling P g <br />' Wells gauged and sampled IW 1, MW2-MW5,MW8,MW10-MW13,RW1,RW2,RW4, <br /> V1-V4, UVB-MW1, UVB-MW2, SWI, SW2 <br /> Wells gauged only. MW1, MW6, MW7, MW9 <br />' Groundwater flow direction: Northeast <br /> Groundwater gradient 0 004 <br /> Remediation system status during <br />' groundwater monitoring event UVB system not operating <br /> Well screens submerged IW1,MW11-MW13,RWI,RW2,RW4,V1-V4,UVB-MWI, <br /> UVB-MW2, SWI, SW2 <br />' Well screens not submerged MW1-MW10 <br /> Liquid-phase hydrocarbons Observed as sheen in V4, WB-MW I <br /> Laboratory: TestAmenca, Inc , Nashville, Tennessee <br /> I <br /> 9 Npro)ects\73942\master\wp\gO6o3r3942text doe 1 <br />