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1 <br />' Quarterly Report - Third Quarter 2005 <br /> . Former BLUE STAR GASOLINE <br />' 4040 East Main Street, Stockton, California <br />' 1.0. INTRODUCTION <br /> At the request of Mr Khalid Anber, Advanced GeoEnvironmental, Inc (AGE) has prepared this <br />' report of environmental activities conducted at 4040 East Main Street, Stockton, California(site) <br /> The scope of work included the performance of a quarterly ground water monitoring event, <br /> submission of monitoring and analytical data to the State Water Resources Control Board's <br /> GeoTracker information management system, and preparation of this report The site and <br /> surrounding area are illustrated on Figure 1 Soil borings,former underground storage tanks(USTs), <br /> ' and monitoring well locations are illustrated on Figure 2 Site background information is <br /> summarized in Appendix A <br /> ' 2.0. PROCEDURES <br /> ' Field work was performed in accordance with guidelines issued by the Central Valley Regional <br /> Water Quality Control Board(CVRWQCB)for the investigation of underground storage tank(UST) <br /> sites and by the San Joaquin County Environmental Health Department(EHD) for the sampling of <br /> ' • ground water monitoring wells <br /> ' 21 QUARTERLY WELL MONITORING <br /> The third quarter ground water monitoring event was performed on 09 August 2005, ground water <br /> ' monitoring was performed on monitoring wells MW-I through MW-3 <br /> ' 2 2 WELL MONITORING AND EVACUATION <br /> On 09 August 2005, the depths to ground water in monitoring wells MW-1 through MW-3 were <br /> ' measured from the tops of the well casings to the nearest 0 01-foot utilizing a Solinst water level <br /> meter Ground water elevation in each well was calculated by subtracting the measured depth to <br /> ' ground water from the surveyed casing elevation(Table 1) <br /> After water levels were measured, approximately 5 5 to 8 gallons of water (a minimum of three <br /> ' casing water volumes per well) were purged from wells MW-1 through MW-3 using a Waterra <br /> inertia pump and dedicated tubing Ground water temperature,pH,and conductivity were irieasured <br /> at regular intervals during purging using an Oakton water analyzer Field sheets and data are included <br /> ' in Appendix B Purged water was stored on-site in properly labeled,Department of Transportation_,� <br /> (DOT)-approved 55-gallon drums pending proper disposal <br /> • <br /> ' Advanced GeoEnvironmental,Inc <br />