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Quarterly Report - Second Quarter 2002 PLAZA LIQUORS II I2420 West Turner Road, Lodi, California I1.0. INTRODUCTION At the request of Mr Robert McCarty,Advanced GeoEnvironmental,Inc (AGE) has prepared this Iquarterly report for the property located at 2420 West Turner Road, Lodi, California The site and the surrounding area are illustrated in Figure 1 On-site structures and monitoring well locations are illustrated on Figure 2 The scope of work included conducting a quarterly ground water monitoring event and preparation of this report Background information for the site is summarized in AGE's work plan titled Additional Site Assessment Work Plan, dated 08 August 2001 The objective of the work was to monitor dissolved petroleum hydrocarbon concentrations in ground water and to characterize ground water flow direction and gradient on the site ' 2.0. PROCEDURES I Field work was conducted and this report was prepared in accordance with guidelines issued by the Central Valley Regional Water Quality Control Board (CVRWQCB) for subsurface investigation of underground storage tank (UST) sites and guidelines issued by San Joaquin County IEnvironmental Health Department (EHD) for sampling ground water monitoring wells 2 1 WELL MONITORING AND EVACUATION On 04 April 2002,the depth to ground water in all four monitoring wells was measured from the top Iof 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 water levels were gauged,casing water in the monitoring wells was evacuated using disposable plastic bailers Between 6 0 and 7 25 gallons of water (a minimum of 3 casing-water volumes per ' well)were removed from each well 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 A Purged water was stored on-site in labeled, 55-gallon DOT-approved drums 22 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES Water samples were collected from each purged well using new disposable plastic bailers after I allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each water sample was transferred into one 1-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 Advanced GeoEnviron mental,Inc