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k <br /> g y e <br /> - <br /> t <br /> x <br /> - <br /> i <br /> I <br /> f:\peojects\5130\tY�'nP I <br /> MMIL � <br /> Kill <br /> 4 <br /> 13 Background <br /> l . <br /> Figure 1 shows the locations and analytical results of five soil samples taken from beneath <br /> a 2,000 gallon gasoline tank, 10,000 gallon diesel tank tank,and the associated piping when <br /> the tanks were removed in January 1989 by Jim Thorpe Oil. The samples contained Total <br /> Petroleum Hydrocarbons as gasoline(TPHG)at concentrations ranging from nondetectable <br /> (ND<1) to 2,2{10 parts per million (ppm) and Total Petroleum Hydrocarbons as diesel <br /> HD)rangi%from nondetectable(<10)w.5,500 ppm. BOmne,Toluene,Ethylbenzene, <br /> and Xylenes (BW-X) were found at concentrations ranging from nondetectable (<0.025- <br /> 25) to 300 ppm. One of the three soil samples analyzed for total lead contained 9 ppm <br /> (detection limit 5 ppm). Three samples analyzed for ethylene dFbromide contained <br /> nondetectable (<0.25-25 ppm) concentrations. <br /> The former tank excavation remained open from January 1984 until November 1990 when <br /> ESE was retained by Delta Track to perform this additional investigation. The stockpUrd <br /> soil from the January 1989 ex:avation remains on site. <br /> Based on soil Sample arAMcal results from the January 1989:nvostigation,significant levels <br /> of hydri�:a�-ba�s appear to be limited to the areas beneath the product lines and the west <br /> end of the former diesel tank(samples 5 and 2,respectively). Lead and ethylene dibromide. <br /> were not found above regulatory action levels. <br /> a <br /> 1 Overexcevation was proposed by ESE to deepen and enlarge the excavation around the <br /> product lines and the west eco of the diesel tank to remove the soil containing <br /> hydrocarbons. Drilling and sampling one or more soil borings within the building and <br /> aampling the excavation itself was proposed by FSE to emess the lateral and vertical extent <br /> 6 of hydrocarbons in the soil surrounding the excavation and beneath the building. <br /> i <br /> t <br />