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I <br />' 12 January 2004 <br /> • AGE-NC Project No 95-0143 <br />' Page 5 of 5 <br />' • TPH-g and BTEX compounds were detected in MW-3,MW-7,MW-9,MW-15 and MW-22 <br /> The highest concentration of TPH-g and BTEX compounds were detected In samples <br /> collected from monitoring well MW-3 and were well above the above the DHS's Maximum <br />' Contaminant Levels for BTEX to drinking water <br /> • The concentrations of TPH-g and BTEX constituents In samples collected from MW-15 and <br />' MW-22 are the highest detected to date in samples collected from the respective wells An <br /> apparent explanation for the significant increase in concentrations Is not known to AGE at this <br /> time <br />' a MTBE was detected in well MW-23 at a concentration of 4 9 µg/1 1,2-DCA was detected <br /> In the sample collected from well MW-14 at a concentration of 2 7 Pg/l <br />' • During the May 2003 sampling event,target analytes were not detected In samples collected <br /> from wells MW-6, MW-10, MW-16, MW-17 and MW-24 <br /> 5.0 RECOMMENDATIONS <br />' Based upon data collected during the May 2003 and previous sampling events, AGE recommends <br />' • Continued quarterly monitoring of the ground water monitoring well system on the site <br /> concurrent with monitoring at the Madison site <br /> • Continued operation and maintenance of the ozone injection system,monitoring of the system <br />' should be conducted weekly <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 mainly upon <br /> analytical results provided by an independent laboratory Evaluations of the ground water conditions <br /> at the site have been made from a limited number of available data points(i e monitoring wells and <br /> ground water samples), and subsurface conditions may vary throuih time and with distance from <br /> these data points No other warranty, expressed or Implied, Is made as to the professional <br />' interpretations, opinions and recommendations contained In this report <br /> 1 <br /> Advanced GeoEnvironmental,Inc <br />