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20 May 1995 <br /> AGE-NC-95-0103 <br /> - Page 4 of 4 - <br /> at the site is minimal and removal performed in conjunction with a standard quarterly <br /> monitoring is adequate <br /> ' S 2 HYDROCARBON-IMPACTED GROUND WATER <br /> Ground water flow direction has remained relatively constant at the site Well MW-3 <br /> continues to be'the downgradient well Petroleum hydrocarbon concentrations in MW-3 <br /> have increased approximately 20 percent from January 1995 The increase in hydrocarbons <br /> ' concentrations may be related to the rise of ground water, causing washing of impacted soil <br /> within the capillary fringe or lower vadose zone <br /> Soil vapor extraction and in-situ air sparging at the site is scheduled to begin sometime <br /> during the summer of 1995 We recommend installation of an addtional monitoring well, <br /> down-gradient of MW-3, to monitor possible migration of the impacted ground water plume <br /> 6.0. LIMITATIONS r <br /> Our professional services were performed using that degree of care and skill ordinarily <br /> exercised by environmental consultants_ practicing in this or similar localities The findings <br /> twere based upon analytical results provided by an independent laboratory Evaluations of <br /> the geologic/hydrogeologic conditions at the site for the purpose of this investigation are <br /> made from a limited number of available data points, and subsurface conditions may vary <br /> away from these data points No other warranty, expressed or implied, is made as to the <br /> professional recommendations contained in this report y <br /> 1 _ - <br />