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Quarterly Report - Second Quarter 2003 • PLAZA LIQUORS II 2420 West Turner Road, Lodi, California 1.0. INTRODUCTION I At the request of Mr Robert McCarty,Advanced GeoEnvironmental, Inc (AGE)has prepared this quarterly report for the property located at 2420 West Turner Road, Lodi, California The scope of work included performance of a quarterly ground water monitoring event and preparation of this report The site and the surrounding area are illustrated in Figure 1 On-site structures and monitoring well locations are illustrated on Figure 2 Site Background information is summarized in Appendix A 2.0. PROCEDURES IFieldwork was performed in accordance with guidelines established by the Central Valley Regional Water Quality Control Board(CVRWQCB)for the investigation ofunderground storage tank(UST) sites i2 1 WELL MONITORING AND PURGING On 07 April 2003, the depth to ground water in all eight monitoring wells was measured from the Itop of each well casing to the nearest 0 01-foot utilizing a Solmst water level meter Ground water elevation in each well was calculated by subtracting the measured depth to ground water from the surveyed casing elevation (Table 1) After recording water level measurements, dedicated disposable plastic bailers were used to purge the wells of standing water Approximately 6 0 to 8 0 gallons of water(a minimum of 3 casing-water volumes per well) were removed from wells MW1 through MW8 Ground water temperature, pH and conductivity were measured at regular intervals during purging using an Oakton water analyzer Field sheets and data are included in Appendix B Purged water was stored in properly labeled DOT- approved model 17H 55-gallon drums and stored on-site E22 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES Water samples were collected from each purged well using new disposable plastic bailers after allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each water sample was transferred into one I-liter amber bottle without sample preservative and into three 40-m1 VOA vials containing 0 5 ml 18% hydrochloric acid as a sample preservative After collection, the samples were properly labeled, placed in a chilled container and transported under IAdvanced GeoEnvi ron mental,Inc I