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i <br /> Chronology <br /> 16555 Von Sosten Road, Tracy <br /> sampled. MW2 and MW6 evidenced higher contamination than in <br /> the Fall 1994. <br /> 10/19/95 Monitoring wells 2, 5 and 6 were sampled. <br /> 11/07/95 PHS/EHD letter that requested a work plan for remediation of the <br /> soil in the former tank area. <br /> 11/27/95 PHS/EHD received a work plan for excavation of the former tank <br /> pit area. <br /> i <br /> 12120-21195 Excavation of contaminated soil from the former tank area. Soil <br /> contamination to the north and eiast from 5' - 11' below grade <br /> remains but the bulk of the contamination was removed. <br /> Excavation was filled with clean material. <br /> 03/05/96 Water samples were collected from various wells. Low levels of <br /> contamination evidenced in samples from MW2 and MW6. <br /> 11/05/96 Soil from the tank area excavation had been aerated and was <br /> sampled this date. No contamination was detected. The soil is to <br /> be spread on site. <br /> 02/14197 Closure report submitted to PHSIEHD. <br /> 03/31/97 PHS/EHD concurs with closure but requests additional information <br /> i <br /> for the closure report. <br /> i <br /> I <br /> i <br />