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June 7, 1995 - JTO submitted workplan to reenter sites of removed <br /> UST' s and take soil samples. <br /> September 18, 1995 - WJH submitted workplan addendum giving <br /> additional details of project . <br /> January 12, 1996 - Spoil pile was sampled by Wm. Hunter, RG, from <br /> Wm. J. Hunter & Associates. A sketch map showing the locations <br /> of the six samples is included as PLATE IV. The 6 samples were <br /> composited into 3 for analysis . The results of those analyses <br /> are summarized on TABLE I; laboratory sheets and chain of custody <br /> is included as EXHIBIT F. <br /> March 18, 1996 - Workplan & addendum was approved by San Joaquin <br /> County EHD; a copy of that document is included as EXHIBIT E. <br /> DETAILS OF WORK PERFORMED UNDER APPROVED WORKPLAN: <br /> On March 22, 1996, Jamie Thorpe, from Jim Thorpe Oil, Inc. <br /> mobilized a backhoe on location and began filling the west <br /> excavation with the spoil which had been stored on location since <br /> the tanks had been removed in 1989 . Laboratory analyses of soil <br /> samples taken from the spoil in January, 1996, were shown to be <br /> below detection limits for gasoline compounds. Those results are <br /> summarized on TABLE I; laboratory sheets, QA/QC, & custody chain <br /> are included as EXHIBIT F. <br /> Wm. J. Hunter, RG from Wm. J. Hunter & Associates arrived at 0950 <br /> hours to supervise the work. When sufficient soil had been <br /> returned to the hole, the backhoe entered the excavation from the <br /> west side and began removing a portion of the soil from the <br /> undisturbed area between the two tanks. The material was placed <br /> temporarily on the ground next to the hole. An odor of "old" <br /> gasoline was detected in some of the soil removed at around 12 ' <br /> bgl . After removing soil to a depth of about 151 , the geologist <br /> pushed a clean metal sleeve into the material from the teeth of <br /> the backhoe bucket, making sure that no headspace was present . <br /> The ends of the tube were promptly covered with teflon tape, <br /> sealed with plastic end caps, and thoroughly wrapped with duct <br /> tape. The sleeve was labeled and placed on ice in a sealed <br /> chest. A faint petroleum odor was noted while collecting the <br /> sample. <br /> The backhoe then removed some additional spoil, and another <br /> sample was taken at 16 ' bgl and preserved as detailed above. No <br /> odor was noted in any of the soil in the backhoe bucket or metal <br /> sleeve. The soil consisted primarily of tan to light brown <br /> slightly plastic clay, silty clay, and streaks of harder, lighter <br /> colored material . There were infrequent lenses of sandy, silty <br /> 3 <br />