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I <br />' INTRODUCTION <br />' At the request of ExxonMobil Refining and Supply Company,ETIC Engineering,Inc has prepared <br /> this quarterly groundwater momtonng 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 /> recent site activities This report covers site activities from 18 December 2002, the date of the last <br /> monitoring event, until 24-25 March 2003, the date of the recent monitoring event The report also <br />' <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 /> I Site address- 4444 North Pershing Avenue, Stockton, California <br /> Current property owner: Edna I Fillppi 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 24 and 25 March 2003 <br />' Wells gauged and sampled IWI,MWl-MW5,MW7-MWIO,MW13,RWl,RW2,RW4, <br /> V1-V4, UVB-MWI, UVB-MW2, SWI, SW2 <br /> Wells gauged only- MW6 <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, RWI, RW2, RW4, VI-V4, UVB-MW1, <br /> UVB-MW2, SWI, SW2 <br /> Well screens not submerged MW 1-MW 10 <br /> Liquid-phase hydrocarbons: Not observed or detected <br /> Laboratory TestAmenca, Inc , Nashville, Tennessee <br /> • <br /> 9\ProlEcts173942Imasterlwp�gO30313942text dm I <br />