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October')0, 1997 <br /> Page 6 <br /> the unpacted area There is no evidence of hydrocarbon saturated soil <br /> beneath the site <br /> • No SPH have ever been detected in any well <br /> e The dissolved plume appears stable TPH-g has been detected in <br /> perimeter downgradient wells in only 1 of 16 quarterly monitoring <br /> events After detection of TPH-g in wells during the January 1994 <br /> sampling event, the wells were resampled the following month and <br /> TPH-g was not detected <br /> • The newest municipal water-supply well is reported to be located <br /> approximately 1,800 feet crossgradient of the site <br /> • Assessment and remediation costs incurred to date have been <br /> approximately $564,000 The estimated incremental cost of additional <br /> requested assessment and expansion of remediation system is $10,000 <br /> • PACIFIC believes that sufficient resources have already been <br /> expended to establish lack of threat to public health and to warrant no <br /> further regulatory action <br /> . Based on the above factors, this case should be closed and no further regulatory action <br /> required <br /> Should you have any questions regarding this request, please call <br /> Sincerely, <br /> Pacific Environmental GG � 'enc& <br /> D00 EY <br /> 3 <br /> ° <br /> U <br /> R Lee Dooley �r <br /> Senior Geologist `OCIS <br /> CEG 183 <br /> L~ <br /> Robert K We au, P E <br /> Senior Engineer <br /> RCE 3 73 95 <br /> 311 i 657AICL6481 DOC <br />