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Quarterly Report - Second Quarter 2002 <br /> • Former CURTISS PONTIAC-BUICK <br /> 2450 Taste Road, Tracy, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr Jae Toste of J T Storage, Advanced GeoEnvironmental, Inc (AGE) has <br /> prepared this quarterly report for 2450 Taste Road, Tracy, California (the site) The scope of work <br /> included monitoring and sampling nine ground water monitoring wells for laboratory analysis, data <br /> analysis and preparation of this report The site setting is illustrated in Figure 1 A plan view of the <br /> site is illustrated in Figure 2 <br /> Summaries of previous investigations at the site are included in the AGE-prepared Preliminary <br /> Investigation and Evaluation Report(PIER),dated 15 August 1997 and Quarterly Report, dated 18 <br /> September 1997 Quarterly monitoring data from February 1998 to present is summarized in <br /> ITables 1 and 2 of this report <br /> Quarterly ground water monitoring events at the former Curtiss Pontiac-Buick site are coordinated <br /> to occur concurrently with ground water monitoring activities at Grant Line Gas and Fuel at 2420 <br /> Grant Line Road, ground water monitoring data from Grant Line Gas and Food monitoring well <br /> GLMW-3 has been included in this investigation to delineate the down gradient extent of the <br /> • dissolved hydrocarbon plume and to determine ground water flow direction and gradient <br /> 2.0. PROCEDURES <br /> Field work was conducted and this report was prepared in accordance with guidelines issued by the <br /> ICentral Valley Regional Water Quality Control Board (CVRWQCB) for subsurface investigation <br /> of underground storage tank (UST) sites and guidelines issued by the San Joaquin County <br /> Environmental Health Department (EHD) for sampling ground water monitoring wells <br /> 2 1 WELL MONITORING AND EVACUATION <br /> On 23 April 2002, a Solinst water level meter was used to measure the depth to ground water in each <br /> well relative to the tops of the well casings After ground water depth measurements were collected, <br /> monitoring wells MW-1 through MW-7 were purged using disposable plastic bailers Between 4 and <br /> 11 gallons of water were evacuated from each of the monitoring wells, equivalent to three casing- <br /> water volumes per well Temperature, pH and conductivity were measured at one- or two-gallon <br /> intervals with an Oakton water analyzer Logs of the field data are included in Appendix A Purged <br /> water was stored on-site in labeled DOT-approved 55-gallon drums <br /> Advanced Geo Environmental Inc <br />