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' Quarterly Report - Fourth Quarter 2004 <br /> • FIVE STAR MARINA <br /> 345 Yosemite Street, Stockton, California <br /> ' 1.0. INTRODUCTION <br /> At the request of Mr Terry McDonald of Five Star Marina, Advanced GeoEnviroamental, Inc <br /> ' (AGE)has prepared this quarterly report for the property located at 345 Yosemite Street, Stockton, <br /> California (site) The scope of work included the performance of a quarterly ground water <br /> monitoring event,submission of monitoring and analytical data to the State Water Resources Control <br /> Board's GeoTracker information management system, and preparation of this report The location <br /> of the site and surrounding area is illustrated on Figure 1, structures, former underground storage <br /> tank (UST) locations, and soil boring and monitoring well locations are illustrated on Figure 2 <br /> Site: history and findings from previous investigations and monitoring events are provided in <br /> Appendix A The results of previous ground water monitoring events are included in the tables of <br /> this report <br /> 2.0. PROCEDURES <br /> ' This investigation was conducted in accordance with the Central Valley Regional Water Quality <br /> Control Board(CVRWQCB)and the San Joaquin County Environmental Health Department(EHD) <br /> guidelines for the subsurface investigation of underground storage tank(UST) sites and sampling <br /> ' of ground water monitoring wells <br /> 2 1 WELL MONITORING AND EVACUATION <br /> On 22 October 2004, a Solinst water level meter was used to measure the depth to ground water in <br /> ' monitoring wells MW-I through MW-5 relative to the tops of the well casings After the depth to <br /> ground water measurements were collected,casing water in monitoring wells MW-1 through MW-5 - <br /> was evacuated using dedicated, disposable plastic bailers, between 4 5 and 5 5 gallons of water, <br /> ' equivalent to three casing water volumes per well, were evacuated <br /> Temperature,pH, and conductivity of the purged water were measured at regular intervals using an <br /> ' Oakton water analyzer Field data logs are provided in Appendix B Purged water was containerized <br /> in properly labeled,Department of Transportation(DOT)-approved 55-gallon drums and stored on- <br /> site <br /> t22 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> . Water samples were collected from each monitoring well using a dedicated,disposable plastic bailer <br /> ' Advanced GeoEnvironmental,Inc <br /> 1 <br />