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16 2.0 9ROUN D WAIF R MQ NIT0M NO_PROCEDURES On January 27,1994, Environmental Science & Engineering, Inc. (ESE) staff measured water levels in wells SI-1, SI-2, SI-3 and UST-1 and purged and sampled well UST -1 (Figure 2). ESE first measured the static water level in the well using an electronic interface probe Then, using a electric submersible pump, approximately 45 gallons of water were purged from the well During the purging process, pH, temperature and conductivity were measured The well purging was considered complete when a minimum of three well volumes were evacuated, the final field measurements of pH, temperature and conditions were within 15 percent of the prior measurement, and the purged water was clear The ground water sample was then collected from well UST-1 by lowering a new (precleaned) disposable polyethylene baler in the well using new, disposable nylon cord The filled bailer was retrieved, emptied, then filled again The ground water from this bailer was then decanted into appropriate laboratory supplied glassware The containers were filled such that no headspace was present to the samples in order to avoid volatilization of the sample The filled sample containers were then labeled and placed in a cooler under ice for transport under chain of custody documentation to ESE's California certified laboratory in Peoria, Illinois ESE then documented e sampling procedures on the attached Well Sampling Field log (Appendix B) Purge water was stored in labeled drums and remains on site in a secure area of the site // h A tnp�blank consisting of dexonized water was provided by the ESE laboratory as a check on sample handling procedures The trip blank accompanied the samples to the laboratory The ground water sample from UST-1 and accompanying trip blank were analyzed at the laboratory for: F\6925400\1gmM rpt 2 Entvonmenlal Science&Engmeenng, Inc