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' Quarterly Report - Second 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 Gannecchim,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 on Figure 1 On-site structures and <br /> monitoring well locations are illustrated on Figure 2 Site Background information is summarized <br /> in Appendix A <br /> 2.0 PROCEDURES <br />' Monitoring wells MW-1 through MW-4 were monitored and sampled on 18 May 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 /> lie 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 Solinst 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 />' After water levels were measured between 5 5 and 8 0 gallons of water a minimum of 3 casing- <br /> water <br /> - <br /> g ( g <br /> I water 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 in properly labeled,55-gallon Department of Transportation(DOT)- <br /> approved drums <br /> r22 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 <br /> 18% hydrochloric acid solution as a sample preservative <br /> Advanced GeoEnvironmental,Inc <br /> I <br />