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g,�.; <br /> INN <br /> �-� ... - - <br /> 4.0 DiSt.'USSION <br /> .,.a <br /> 4.1 1-ydrogcolo!yy <br /> The ground-n'.Itcr ClmW dit-CCEiCIR rCnlalllS u} the ;011111-SnnlhWest with a gradient of 0.0046 <br /> feet/feet (24A feetilinile). This is similar to the Novembcr, 1990, FebrUM-y, 1991 and May, <br /> 1991 data ("fable 1). <br /> 4.2 Ground-Water AnalYsis <br /> Soil containing detectable concentrations of hydrocarbons that remains in the <br /> former tank arca may he leaching very lot, concentrations of volatile organic compounds <br /> (VOC) into the ,roulul getter hCneuth the site. 1-Itmever, a more likely possibility may be <br /> that the VOC.' su'c originclting off-site beCUUSC aiI soils ,ulnlyzed for BTEX from this site <br /> have never shrnrn any ineais rible cow,'eritliltions. The detection limit for 13TEX in soil is <br /> five microg,r:anls her Kilogram and low concentrations of BTEX could have been missed. <br />