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r IQuarterly Report - Third Quarter 2005 • FLAME MINI-MART 1301 West Kettleman Lane, Lodi, California ' 1.0. INTRODUCTION At the request of Mr Pete Graffigna,Advanced GeoEnvironmental, Inc (AGE) has prepared this ' quarterly report for Flame Mini-Mart, 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 objective of the work was to assess, characterize and monitor dissolved petroleum ' hydrocarbon concentrations in ground water and to calculate ground water flow direction and gradient on-site The site setting is illustrated on Figure 1 Site structures and monitoring well locations are depicted on Figure 2 This report has been prepared in accordance with guidelines issued by the Central Valley Regional Water Quality Control Board (CVRWQCB) for investigation of underground storage tank (UST) sites A summary of previous investigations at the site was previously included in Appendix A of Quarterly Report - Second Quarter 2005, dated 17 August 2005 Ground water monitoring data acquired to date is included in the tables of this report • 2.0. PROCEDURES Seven monitoring wells (MW-1 through MW-7) were monitored, purged and sampled on 25 July 2005 Field work was performed in accordance with San Joaquin County Environmental Health Department (EHD) guidelines for sampling ground water monitoring wells and CVRWQCB guidelines for the investigation of UST sites I 21 WELL MONITORING AND PURGE PROCEDURES On 25 July 2005 the depth to ground water in wells MW-1 through MW-7 were measured from the top of each well casing to the nearest 0 01-foot utilizing a Solinst water level meter, ground water elevations for each well were calculated by subtracting the measured depth to ground water from the surveyed casing elevation (Table 1) After water levels were measured, approximately 4 5 to 5 5 gallons of water (a minimum of 3 casing-water volumes per well) were purged from monitoring wells MW-1 through MW-6 and approximately 17 gallons of water were removed from well MW-7 using a Watera hydrolift pump and dedicated tubing Ground water temperature,pH and conductivity were measured at regular intervals during purging using an Oakton water analyzer Field sheets and data are included in Appendix A Purged water was stored in properly labeled Department of Transportation (DOT)-approved 55-gallon drums and stored on-site • IAdvanced GeoEnvironmental,Inc