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CECCHINI CECCHIM, AND GIOVANNOM, FUELING ISLAND <br /> 2.0 GR®ALJ 1 V D V'V A11 ER MONETORU4G PiN®C1GDURiPiS <br /> On March 20 1995 Environmental Science & Engineering, staff measured water <br /> g g, Inc (ESE)) <br /> levels in wells SI-1, SI-2, SI-3, and UST-1 and purged and sampled well UST -1 (Figure 2) <br /> ESE first measured the static water level in the wells using an electronic interface probe Then, <br /> using an electric submersible pump, approximately 55 gallons of water were purged from well <br /> UST-1 During the purging process, the pH, temperature and conductivity of the extracted <br /> ground water were measured The well purging was considered complete when a minimum of <br /> three well volumes of ground water were evacuated, the final field measurements of pH, <br /> temperature and conditions were within 15 percent of the prior measurement, and the purged <br /> water was clear <br /> The ground water sample was then collected from well UST-1 by lowering a new (precleaned) <br /> disposable polyethylene bailer in the well using new, disposable nylon cord The filled bailer was <br /> retrieved, emptied, then filled again The ground water from this bailer was then decanted into <br /> appropriate laboratory supplied glassware The containers were filled such that no headspace was <br /> present in the samples in order to avoid volatilization of the sample The filled sample containers <br /> were then labeled and placed in a cooler under ice for transport under chain of custody <br /> documentation to McCampbell Analytical, a California-certified laboratory ESE documented the <br /> sampling procedures on the attached Well Sampling Field Log (Appendix B) Purge water was <br /> placed in labeled drums and remains on site in a secure area of the site <br /> A trip blank consisting of deionized water was provided by the ESE laboratory as a check on <br /> sample handling procedures The trip blank accompanied the samples to the laboratory <br /> The ground water sample from UST-1 was analyzed at the laboratory for <br /> G Total Petroleum Hydrocarbons (TPH) as diesel using EPA Method 5030/8015 <br /> Modified (typically TPH as gasoline is also analyzed, However that analysis was <br /> na not re guested this quarter), and <br /> 9y o Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX) using EPA Method 8020 <br /> a� The trip blank was only analyzed for BTEX <br /> F\694540011QM95 RPT 2 Environmental Science&Engineering Inc <br />