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Quarterly Report - First Quarter 2002 <br /> '�- WESTERN SQUARE INDUSTRIES <br /> 1565/1621 North Broadway, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr. Larry Bartko of Western Square Industries,Advanced GeoEnviromnental,Inc. <br /> _ (AGE)has prepared this quarterly report for the site located at 1565/1621 North Broadway,Stockton, <br /> California. The scope of work included ground water monitoring and preparation of this report. The <br /> location of the site is illustrated on Figure l; a plan of the site is illustrated on Figure 2. Background <br /> information can be found in the AGE-prepared document Ground Water Moniloring Well <br /> Installation Report - Fourth Quarter 1999, dated 10 March 2000. <br /> _ This report was prepared as required by the San Joaquin County Environmental Health Department <br /> (EHD) and is in accordance with US EPA Region 9 Guidelines for Closure of Shallow Disposal <br /> Wells - 1992. <br /> 2.0. PROCEDURES <br /> The objective of the work was to monitor dissolved petroleum hydrocarbon concentrations,volatile <br /> organic compounds and metals in ground water and to characterize ground water flow direction and <br /> _ gradient on the site. Field work was conducted in accordance with guidelines established by the <br /> California Regional Water Quality Control Board - Central Valley Region for investigation of <br /> underground storage tank (UST) sites and the EHD for sampling ground water monitoring wells. <br /> 2.1. WELL MONITORING AND EVACUATION <br /> On 26 March 2002, ground water monitoring and sampling was performed on wells MW I, MW2 <br /> _ and MW3. Prior to sampling, the depth to ground water was measured from the top of each well <br /> casing to the nearest 0.01-foot utilizing a Solinst water level meter. The ground water elevation in <br /> each well was calculated by subtracting the measured depth to ground water from the surveyed <br /> casing elevations (Table 1). <br /> After water levels were gauged, a disposable plastic bailer was used to purge each monitoring well <br /> of standing water.Approximately five gallons ofwater(a minimum of 3 casing-water volumes)were <br /> removed from each well. Ground water temperature,pH and conductivity were measured at regular <br /> intervals during purging using an Oakton water analyzer. Field sheets and data are included in <br /> Appendix A. Purged water was stored on-site in labeled, 55-gallon DOT-approved drums. <br /> Advanced GeoEnvironmental.Inc <br />