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- 05 October 2001 _ <br /> AGE-NC Pfoject No 98-0521 _ - <br /> Page 4 of 4 <br /> y hydraulic gradient was estimated to be 0 008 foot/foot <br /> _ -• <br /> Dissolved -phase hydrocarbons, including TPH-g, BTEX and MTBE, are present at <br /> significant concentrations In the sample from well MW-4, within the former UST area <br /> Hydrocarbons were encountered m the down-gradient direction from the former UST area <br /> -- to the location of monitoring well MW-2 <br /> + Additional site assessment will be required to fully assess the down-gradient and vertical <br /> - extent of the dissolved h drocarbons <br /> 5.0. RECOMMENDATIONS - <br /> ' wBased on the-re-sults of this-Investliation,AGE recommends <br /> Continuation of-quarterly monitoring at the site The next monitoring event should be <br /> scheduled for November 2001 <br /> + Installation of one additional monitoring well northeast of the site to assess the lateral extent <br /> of dissolved hydrocarbons and fuel additives in ground water <br /> Preparation of a work plan addendum to delineate the vertical extent of hydrocarbon-- <br /> , unpacted ground water <br /> -- --6.0. -LIMITATIONS ti <br /> ' _= Our professional services were perfor=med using that degree of care and skill ordinarily exercised by- <br /> environmental consultants=practrcing in this or similar localities The findings were based mainly <br /> - <br /> --upon analytical results -provided by an independent laboratory Evaluations of the <br /> geologic/hydrogeologic conditions at the site for the purpose of this investigation are made from.a - <br /> _ =limited number of available data points (r e-monitoring wells and ground water samples), and - <br /> -subsurface conditions may vary away from these data points No other warranty, expressed or <br /> implied, is made as to the professional recommendations contained in.this report <br /> Advanced GeoEnvironmental,Inc. <br />