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� Quarters Report - Second Quarter 2003 ' FLAG CITY CHEVRON 6421 Capitol Avenue, Lodi, California I1.0. INTRODUCTION AND SCOPE OF WORK ' At the request of Mr Richard Bokides,Advanced GeoEnvironmental, Inc (AGE)has prepared this quarterly report for 6421 Capitol Avenue (the site), Lodi, California The report documents procedures and results for ground water monitoring and remediation performed at the site between ' March and June 2003 (second quarter) The site setting is illustrated on Figure 1 Site structures and monitoring well locations are depicted on Figure 2 I The enclosed report was prepared as required by California Regional Water Quality Control Board- Central Valley Region (RWQCB) Cleanup and Abatement Order No 5-00-700, dated 01 March 2000,and was prepared in accordance with guidelines established by the RWQCB for investigation of underground storage tank (UST) sites Background information and a description of prior investigations at the site were included in AGE's Final Remedtatzon Plan, dated 31 August 2000 The objectives the of second quarter investigations were to characterize, assess and monitor dissolved petroleum hydrocarbons and methyl tert-butyl ether (MTBE) concentrations in ground water,to characterize ground water flow direction and gradient and to continue ground water pump- and-treat remediation at the site The following is a brief summary of second quarter site assessment and remediation activities performed at the site 5 June 2 Between 25 March and 2 a 003-Continued pump-and-treat rernedlatron utilizing on- site extraction wells EW-4, EW-5, EW-7, EW-8, discharged a total of approximately 2,090,669 gallons of treated Flag City Chevron ground water into a conveyance ditch located approximately 450 feet south of the site ® 21 April,14 May and 25 June 2003 -Monthly monitoring events at the ground water pump- and-treat remediation system, extraction wells EW-4, EW-5, EW-7 and EW-8 were in operation • 25, 26 &27 June 2003 - Quarterly ground water monitoring event (second quarter 2003) at wells MW-1 through MW-18, EW-1 through EW-10, CSA-1 and CSA-2 ' 2.0 GROUND WATER PUMP AND TREAT REMEDIATION SYSTEM Between 25 March 2003 and 25 June 2003 (second quarter 2003), a ground water pump-and-treat remediation system was in continuous operation at the site Groundwater pump-and-treat operation and maintenance procedures for the site were outlined in AGE's Final Remediation Plan, dated 31 August 2000 Advanced GeoEnvironmental,Inc.