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' 10 January 2001 <br /> AGE-NC Project No 98-0533 <br />' Page 6 of 6 <br />' 0 Based on laboratory analysis of soil samples collected, the vertical extent of petroleum <br /> hydrocarbon-impact is defined vertically in B-1 (MW-1)and B-3 (MW-2)at depths between <br /> 5 to 25 feet below surface grade (bsg) <br /> r • TPH-ag was detected in groundwater samples from MW-1 (former UST area) and MW-2, <br /> BTEX compounds were detected in MW-1, MW-2, and B-2 Petroleum hydrocarbon <br /> I products were not detected in samples from MW-3 or DW-1, both located northeast of the <br /> former UST area <br /> I 6.0. RECOMMENDATIONS <br /> O S <br /> Based upon data collected from the site, AGE recommends <br /> • Continued quarterly ground water monitoring <br /> • Further site assessment utilizing soil borings and grab-water samples to determine the lateral <br /> component of petroleum hydrocarbon-impacted soil and ground water required in risk <br /> analysis <br />' 7.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based upon field <br /> measurements and 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 soil borings and ground water samples) and subsurface <br /> conditions may vary away from these data points No other warranty, expressed or implied,is made <br /> as to the professional recommendations contained in this report <br /> I ' <br /> I <br /> I <br /> E _ <br /> 4 <br /> Advanced GeoEnvironmental,Inc <br />