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3 _ <br /> 1 . 22 June tool <br /> AGE-NC Project No 98-0521 <br /> Page 4 of 4 <br /> ' hydraulic gradient was estimated to be 0 008 foot/foot <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 in the down-gradient direction from the former UST area <br /> to the location of monitoring well MW-2 <br /> ' a Additional site assessment will be required to fully assess the down-gradient and vertical <br /> extent of the dissolved hydrocarbons <br /> 5.0. RECOMMENDATIONS <br /> ' Based on the results of this Investigation, AGE recommends <br /> r <br /> ' • Continuation of quarterly momtonng at the site The next monitonng event should be <br /> scheduled for August 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 /> impacted ground water <br /> ' 6.0. LIMITATIONS <br /> ' Our professional services were performed using that degree of care and skill ordmanly exercised by <br /> environmental consultants practicing in this or similar localities The findings were based mainly <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 (i a 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 /> 1 Advanced GeoEnvi ronmental,Inc <br /> I <br />