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' Quarterly Report - Fourth Quarter 2004 <br /> . ERNIE'S GENERAL STORE <br />' 4407 East Waterloo Road, Stockton, California <br />' 1.0. INTRODUCTION <br /> At the request of Mr Ernest P Giannecchim,Advanced GeoEnvironmental, Inc (AGE) has <br />' prepared this quarterly report for the property located at 4407 East Waterloo Road, Stockton, <br /> California The scope of work included performance of a quarterly ground water monitoring <br /> event and preparation of this report The site and the surrounding area are illustrated on Figure 1 <br />' On-site structures and monitoring well locations are illustrated on Figure 2 Site background <br /> information is summarized in Appendix A <br />' 2.0. PROCEDURES <br />' Monitoring wells MW-1 through MW-4 were monitored and sampled on 30 November 2004 <br /> Field work was performed in accordance with guidelines established by the Central Valley <br /> Regional Water Quality Control Board (CVRWQCB) for the investigation of underground <br />' storage tank (UST) sites <br /> 1 • 2 1 WELL MONITORING AND EVACUATION <br />' The depth to ground water in all four momtonng wells was measured from the top of each well <br /> casing to the nearest 0 01-foot utilizing a Solinst water level meter Ground water elevation in <br /> each well was calculated by subtracting the measured depth to ground water from the surveyed <br />' casing elevation (Table 1) <br /> After water levels were measured, between 3 0 and 5 0 gallons of water (a minimum of 3 casing- <br /> water volumes per well) were purged from the monitoring wells using a Waterra inertia pump <br /> with dedicated tubing 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 B Purged water was stored on-site in properly labeled, 55-gallon Department of <br /> Transportation (DOT)-approved drums <br />' <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 <br />' water sample was transferred into three 40-m1 volatile organic analysis (VOA) vials containing <br /> 0 5 ml 18% hydrochloric acid solution as a sample preservative <br /> 0 <br /> Advanced GeoEnvironmental,Inc <br /> 1 <br />