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� Y ., 3yy�sP�aT.`•,fL`� '. ��e �e"�s��F:� �' ..� y �. v__+ _ _ _ _ _i �•�'wt _a-ff�u.s-. ac-xwi.n`�fXF�ZjLi�Ml�a <br /> i ifSA' <br /> C aRp <br /> �w <br /> Uninn Ice ComPony- Weber Street <br /> ReNn•of Fundings <br /> Page: G <br /> most of the water. The lower aquifer was encountered between 51 and 60 feet <br /> and is of an unknown thickness. It is confined by the overlying clay unit. The <br /> piezometric surface of the lower aquifer is about 6.5 feet below the water table <br /> surface in the upper aquifer. <br /> 4.3 Soils Contmninadon <br /> Low levels of hydrocarbon contamination are present in the soils column to a <br /> depth of 15 feet in MW-4D and MW-4S. These two wells are located <br /> immediately adjacent to the old tank excavation. No soils contamination was <br /> encountered in any of the remaining wells throughout the property. 'The <br /> respective depths and concentrations for the samples collected by us in MW-.4S <br /> and WN-413 are as follows (Table 1). <br /> Based on the above data, soils contamination appears to be limited to the <br /> vertical zone from IO-15 feet. The horizontal extent is not defined at present; it <br /> can probably be defined during the remedial excavation. <br /> 44 Ground Fater Contamination <br /> Ground water was sampled three different times at this site. The samefirm <br /> sampled the water for the first 2 rounds, A different firm did the sampling on <br /> the third round. <br /> Henkle and Associates was not involved with the ground water sampling. <br /> W have been told by WHF Environmental Consultants, Inc, that the firm.which e <br /> Performed the first two sampling rounds did not use proper sampling .protocin <br /> obtaining these samples. We were told by WHF Environmental that the <br /> sampling equipment was not steam cleaned between well sampling events, nor <br /> was the sample pump purged with hot water between samples. Sampling events <br /> were on 3/14/90 and 4/5/90. <br /> WHF Environmental informed us that the- - second firm whichperformed the— --- <br /> --- ------- -- -_third round of sampling used- ro - --- <br /> -.- -- - - - equipment was steam cleaned <br /> betweensnity samplingnts,Procedures, thand t i sum was <br /> purged with hot water between samples. In addition, at least 3 well volumes <br /> were removed from each well prior to sampling, This event took place on <br /> 5/17/90. <br />