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I Quarterly Report - Second Quarter 2002 FLAME MINI-MART ' 1301 West Kettleman Lane Lodi, California 1.0. INTRODUCTION ' Advanced GeoEnvironmental, Inc (AGE) has prepared this quarterly report for 1301 West Kettleman Lane (the site), Lodi, California The scope of work included conducting a quarterly ' ground water monitoring event and preparation of this report The site setting Is illustrated in Figure 1 Site structures and monitoring well locations are depicted In Figure 2 ' This report has been prepared in accordance with guidelines Issued by the California Regional Water Quality Control Board-Central Valley Region for Investigation of underground storage tank(UST) sites Site history and findings from previous Investigations at the site are summarized in the AGE- prepared Preliminary Site Assessment Work Plan, dated 30 June 1999 In accordance with a telephone conversation with Mr Harlin Knoll of the San Joaquin County ' Environmental Health Department(SJCEHD)on 08 August 2002,a work plan addendum is included with this report in Appendix A to further assess the vertical extent of petroleum-Impacted ground • water in the area near MW-2, the lateral extent of impacted ground water south-southwest of well ' MW-2 and to assess the area east-northeast of the fuel dispensing area ' 2.0. PROCEDURES ' On 30 May 2002, ground water monitoring was performed at the site on wells MW-1 through MW-4 Monitoring well construction details are summarized in Table 1 Ground water monitoring procedures for the site were outlined In Preliminary Site Assessment Work Plan, dated 30 June 1999, ' prepared by AGE and approved by the SJCEHD by letter dated 07 July 1999 At the direction of the SJCEHD, MW-4 is sampled on a semi-annual basis ' 2 1 WELL MONITORING AND EVACUATION j j ' Depth to ground water was measured in each well from the top of the well casing to the nearest 0 01-foot utilizing a Solmst water level meter The ground water elevation In each well was calculated by subtracting the measured depth to ground water from the surveyed casing elevation ' (Table 2) Ground water elevations were plotted and contoured on a scaled site map (Figure 3) After water levels were measured, approximately 6 to 6'/4 gallons of ground water (a minimum of ' three casing-water volumes per well) were evacuated (purged) from wells MW-1 through MW-4 . utilizing polyethylene disposable bailers Temperature, pH and conductivity were measured for j IAdvanced Geo Environmental,Inc I