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Mr john johmm <br /> Projeo.t 113-26-OZ December 16, 399a <br /> Page 9 <br /> Groundwater Elevations <br /> 95 MW-1 <br /> MW-2 <br /> E <br /> 94 MW-3 <br /> ® MW-4 <br /> 93 <br /> 92 <br /> 2193 5/93 8/93 11/93 <br /> Each monitoring well was purged using an electric submersible pump prior to <br />' sampling. Approximately 10 gallons was removed from each well, more than three <br /> well volumes per well Wate1 levels after purging showed no significant change <br /> prior to sampling. All purge water was placed in a sealed metal drum. Before the <br /> next well was puibred and sampled, the pump was run in one bucket with detergent <br /> and two separate buckets with tap water. All purge water and equipment wash water <br /> was placed in UO'l 171-1 55-gallon steel drums and remains on-site. The water and <br /> drums will be disposed on your authorization with documentation forwarded upon <br /> completion <br /> After each well was purged, a sample was taken using a disposable bailer. The <br /> sample water was placed in two 40-milliliter vials filled so that there was no air <br /> (head space) rernammg in the vials. Samples were labeled and placed on ice to a <br /> cooler for transport to a state certified hazardous materials testing laboratory, <br /> McCampbell Analytical of Pacheco, California. The samples were analyzed for TPH- <br /> gasoline, and BTEX using EPA Methods 5015 and 8020, respectively A copy of the <br /> laboratory report and Chain of Custody form are appended to flus report. <br /> 48 <br /> Parker Er vwenmental Services, 190 East 7th Street, Pittsburg, CA 94565-2317 <br /> Phone (510) 435-1024 Fax (510) 439.2566 <br />