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•� Quarterly Report - First Quarter 2004 <br /> ERNIE'S GENERAL STORE <br /> 4407 East Waterloo Road, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request ofMr Ernest P Giannecchim,Advanced GeoEnvironmental,Inc (AGE)has prepared <br /> this quarterly report for the property located at 4407 East Waterloo Road, Stockton, California The <br /> scope of work included performance of a quarterly ground water monitoring event and preparation <br /> of this report The site and the surrounding area are )illustrated in Figure 1 On-site structures and <br /> monitoring well locations are illustrated on Figure 2 Site Background information is summarized <br /> I in Appendix A <br /> 2.0. PROCEDURES <br /> IMonitoring wells MW-1 through MW-4 were monitored and sampled on 01 March 2004 Field work <br /> was performed in accordance with guidelines established by the Central Valley Regional Water <br /> Quality Control Board(CVRWQCB)for the investigation of underground storage tank(UST)sites <br /> • 2 1 WELL MONITORING AND EVACUATION <br /> The depth to ground water in all four monitoring wells was measured from the top of each well <br /> casing to the nearest 0 01-foot utilizing a Solmst water level meter Ground water elevation in each <br /> well was calculated by subtracting the measured depth to ground water from the surveyed casing <br /> elevation (Table 1) <br /> IAfter water levels were measured, approximately 9 gallons of water(a minimum of 3 casing-water <br /> volumes per well) were purged from the monitoring wells using a Waterra inertia pump with <br /> dedicated tubing Groundwater temperature,pH and conductivity were measured at regular)intervals <br /> during purging using an Oakton water analyzer Field sheets and data are included in Appendix B <br /> Purged water was stored on-site m properly labeled,55-gallon Department of Transportation(DOT)- <br /> approved drums <br />' 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br />' Water samples were collected from each purged well using the dedicated Waterra tubing after <br /> allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each water <br /> sample was transferred into three 40-m1 volatile organic analysis(VOA)vials containing 0 5 ml 18% <br />' hydrochloric acid as a sample preservative <br /> 01 <br />' Advanced GeoEnvironmental,Inc <br />