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{ IQuarterly Report - Second Quarter 2002 • Former Mel Bokides Petroleum Inc. - Navy Drive ' 21.91 Navy Drive, Stockton, California I1.0. INTRODUCTION I At the request of Mr Nick Bokides of Mel Bokides Petroleum Inc ,Advanced GeoEnvironmental, Inc (AGE) has prepared the enclosed report for the former Mel Bokides Petroleum fuel facility located at 2191 Navy Drive,Stockton,California(the site) The site setting is illustrated on Figure 1 Site structures, previous boring and monitoring well locations are depicted on Figure 2 The scope of work included monitoring the ground water monitoring well network on the site This ' report documents collection and analysis of ground water samples and the interpretation of the results of the ground water monitoring event The site history and a description of previous work performed at the site were presented in Preliminary Investigation and Evaluation Report (PIER), dated 18 April 1999 and in Quarterly Report - Third Quarter 2000, dated 09 October 2000, prepared by AGE The field work was performed and this report prepared in accordance with Central Valley Regional • Water Quality Control Board(CVRWQCB)guidelines for subsurface investigations of underground storage tank (UST) sites 2.0. PROCEDURES On 14 June 2002,ground water monitoring and sampling were performed at the site on wells MW-1 and MW-3 through MW-8 Ground water monitoring well MW-2 was not readily located nor accessible during the sampling event Groundwater monitoring procedures for the site were outlined in Preliminary Site Assessment Work Plan, dated 15 June 1999 and conform to ground water monitoring guidelines issued by the San Joaquin County Environmental Health Department(EHD) ' 2 1 WELL MONITORING AND EVACUATION I A Solinst water level meter was used to measure the depth to ground water in monitoring wells MW 1 and MW-3 through MW8 After depth to groundwater measurements were taken,a minimum of 3 casing-water volumes were purged from each well to be sampled using a new, disposable, dedicated bailer Approximately ten gallons of water were removed from each well Temperature, pH and conductivity of purged ground water were measured at 2-or 3-gallon intervals using a Hydac water analyzer Copies of the field data sheets are in Appendix A Purged water was temporarily stored on-site in DOT-approved 55-gallon drums pending proper disposal Advanced GeoEnvironmental,Inc I