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' Quarterly Report - Second Quarter 2005 <br /> • TRACY MARINE SALES <br /> 2353 Toste Road, Tracy, California <br />' 1.0. INTRODUCTION <br /> At the request of Mr Joe Taste, Jr , Advanced GeoEnvironmental, Inc (AGE) has prepared this <br />' quarterly report for the property located at 2353 Toste Road, Tracy, California The site and the <br /> surrounding area are Illustrated on Figure 1 On-site structures,boring locations and monitoring well <br /> locations are illustrated on Figure 2 Background information is summarized In the AGE-prepared <br /> IAdditional Site Assessment Work Plan, dated 26 September 2000 Background information is <br /> summarized In Appendix A <br /> r <br /> 2.0. PROCEDURES <br /> rEleven ground water monitoring wells (MW-1 through MW-11) were purged and sampled on <br /> 11 June 2005 and an ozone-ink ection air-sparging system continually operated over the second <br /> quarter 2005 Field work was performed in accordance with guidelines issued by the Central Valley <br /> Regional Water Quality Control Board(CVRWQCB)for the Investigation of underground storage <br /> tank (UST) sites <br /> 2 1 WELL MONITORING AND EVACUATION <br />' On 11 June 2005,a Solinst water level meter was used to measure the depth to ground water in wells <br /> MW-1 through MW-I 1 relative to the tops of the well casings The ground water elevations and <br /> gradient were determined from these measurements (Table 1) Additionally, a Hanna Instruments <br /> (HI) 9025 water analyzer was used to measure the oxidation-reduction potential in the monitoring <br /> well network The data collected is presented in Appendix B <br />' After recording water level measurements,disposable plastic bailers were used to purge wells MW-1 <br /> through MW-11 of standing water Approximately 4 5 to 6 5 gallons of water (a minimum of 3 <br /> casing-water volumes per well) were removed from wells MW-1 through MW-4, MW-7, MW-9, <br /> MW-10 and MW-11 and approximately 12 gallons of water were removed from MW-6 <br /> Approximately 4 gallons of water were removed from wells MW-5 and MW-8 before the well were <br />' bailed dry Ground water temperature,pH and conductivity were measured at regular intervals during <br /> purging using an Oakton water analyzer. Field sheets and data are included in Appendix B Purged <br /> water was stored on-site in labeled, 55-gallon DOT-approved drums <br />' 22 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Water samples were collected from the purged wells using new disposable plastic bailers after <br /> Advanced GeoEnvironmental,Inc <br />