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p� M) <br /> 19 July 2004 <br /> AGE-NC Project No 95-0109 <br /> Page 7 of 7 <br /> • One or more BTEX compounds were detected in the samples from wells MW-8,MW-9 and <br /> MW-14 at concentrations as high as 11 µg/l benzene(MW-14), 3 2 µg/l toluene (MW-14), <br /> 180 µg11 ethylbenzene (MW-9) and 48 3 µg/l total xylenes (MW-8) <br /> • TPH-g and BTEX compounds were not detected In any of the newly installed monitoring <br /> wells (MW-20, MW-21 and MW-22) The lateral and vertical extent of petroleum <br /> hydrocarbon- and impacted ground water has been defined <br /> • 1,2-DCA was detected in samples collected from wells MW-8,MW-9,MW-11,MW-14 and <br /> MW-16 at concentrations ranging from 2 1 µg/1(MW-8)to 17 µg/1(MW-14) 1,2-DCA was <br /> not detected in any of the newly installed ground water monitoring wells nor the newer <br /> deeply-screened wells The lateral and vertical extent of the 1,2-DCA contamination appears <br /> to be defined <br /> 5.0. RECOMMENDATIONS <br /> Based upon data collected from the site, AGE recommends <br /> • Continued quarterly groundwater monitoring as required by Clean-up and Abatement Order <br /> No 93-701 The next groundwater monitoring event will be scheduled for September 2004 <br /> • Implementation of a six-month ozone injection pilot remediation feasibility study around the <br /> former dispenser area and east to well MW-14 as approved by the Board <br /> 6.0. 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 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 interpretations, opinions and recommendations contained in this report <br /> Advanced CeoEnvironmental,Inc <br />