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1 <br /> IQuarterly Report - Fourth Quarter 2004 <br /> • PLAZA LIQUORS 11 <br />' 2420 West Turner Road, Lodi, California <br />' 1.0. INTRODUCTION <br /> At the request of Mr Robert McCarty,Advanced GeoEnvironmental,Inc (AGE) has prepared this <br />' quarterly report for the property located at 2420 West Turner Road, Lodi, California The scope of <br /> work included performance of a quarterly ground water monitoring event and preparation of this <br /> 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 /> I <br /> 2.0. PROCEDURES <br />' Field work was performed in accordance with guidelines established by the California Regional <br /> Water Quality Control Board - Central Valley Region (RWQCB) for the investigation of <br /> underground storage tank (UST) sites Monitoring wells MW-7 and MW-8 are sampled annually <br /> during the fourth quarter at the request of the San Joaquin County Environmental Health Department <br /> (EHD) <br /> 2 1 WELL MONITORING AND PURGING <br /> On 25 October 2004, the depth to ground water in monitoring wells MW-1 through MW-8 was <br /> measured from the top of each well casing 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 recording water level measurements, dedicated disposable plastic bailers were used to purge <br /> wells MW-1 through MW-8 of standing water Approximately 4 5 to 6 75 gallons of water (a <br /> minimum of three casing-water volumes per well)were removed from wells MW-1 through MW-5, <br /> MW-7 and MW-8, well MW-6 was purged near-dry after approximately 3 gallons were removed <br /> Ground water temperature,pH,and conductivity were measured at regular intervals during purging <br /> I using an Oakton water analyzer Field sheets and data are included in Appendix B Purged water was <br /> stored on-site in properly labeled Department of Transportation (DOT)-approved model 17H <br /> 55-gallon drums <br /> I <br /> 22 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Water samples were collected from each purged well using the disposable plastic bailers after <br /> allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each water <br /> IAdvanced GeoEnvironmental,Inc <br />