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15 June 2004 <br />' AGE-NC Project No 98-0465 <br /> Page 4 of 4 ' <br /> r <br />' concentrations of MTBE Indicates the reported concentration of TPH is actually MTBE <br /> which falls within the same carbon range <br /> J <br />' MTBE was detected in samples collected from MW 1 and MW3 at concentrations of 570 µg/1 <br /> and 8 8 µg/1, respectively The concentration of MTBE in MW 1 exceeds the Primary State <br /> and Federal established maximum containment level (MCL) of 13 µg/l for MTBE in , <br />' drinking water <br /> • The lateral extent of MTBE-Impacted ground water has been defined to the'northeast of the <br />' former UST area, but not toward the west-northwest, east or south <br />' 5.0. RECOMMENDATIONS <br /> , <br /> Based on the findings of this investigation, AGE recommends <br />' Continued quarterly momtonng of the ground water monitoring wells The next monitoring <br /> event was performed on 15 April 2004 <br />' Preparation of a work plan to delineate the lateral extent of MTBE-Impacted ground water <br /> at the site <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 <br /> analytical results provided by an independent laboratory Evaluation of the hydrogeologic conditions <br /> at the site for the purpose of this investigation was made from a limited number of available <br />' subsurface data points(I e ,monitoring wells and ground water samples)and subsurface conditions <br /> may vary away from these data points No other warranty, expressed`or implied, is made as to the <br /> professional opinions, interpretations and recommendations contained in this report <br /> 1 Y 1 <br /> � y <br /> 1 <br /> Advanced GeoEnvlronmental,Inc <br />