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r , <br /> , r <br /> 1 � I <br /> w I I a <br /> , <br /> r r <br /> 26 April 2004 <br /> AGE-NC,Project No 97-0333 <br /> Page 12 o'f 12 <br /> I <br /> I <br /> r <br /> Based on ground water response test data collected between 14 October 2003, AGE-concludes 11 <br /> r , <br /> • Following the shut-down of the pump-and-treat remediation system on 18 September 2003 <br /> ' (26 days), no significant increases were detected from wells MW-1, MW-2 or MW-3, <br /> however, a significant increase in TPH-g, BTEX and MTBE were reported at well MW-6, <br /> which isllocated adjacent'ground water extraction well EW-1 <br /> r � I <br /> ' 6.0 RECOMMENDATIONS <br /> I f t ' <br /> Based upon data collected from the site, AGE recommends <br /> • Continued quarterly ground water monitoring and sampling of monitoring wells MWA, <br /> through MW-13 <br /> r <br /> ' • Continued ground water extraction (interim ground water remediation) from well EW-1 <br /> Generally,the core of the dissolved MTBE-plume appears to located in the First Zone Aquifer within <br /> the area'of wells EW-1,MW-2,MW-3, MW-6 and MW-7A, outside of the dissolved MTBE-core <br /> area,only low to very low MTBE concentrations were detected on-site and off-site towards the north ' <br /> t; in Second Zone,Third Zone&Primary Aquifer Zones Based on the data collected during the third <br /> ' quarter 2003, additional ground,water monitoring wells are not warranted at this time and the <br /> 'I I Ia existing monitoring well network may be sufficient to complete a site Problem Assessment Report <br /> (PAR) l <br /> < I <br /> r <br /> I � I <br /> 7A. LIMITATIONS' <br /> I I <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environfnentat consultants practicing in this or similar localities The findings were based mainly <br /> upon analytical results provided by an independent laboratory Evaluations of the hydrogeologic <br /> I conditions at the site for the purpose of this investigation are made from a limited number of <br /> available data points(ground water samples), and subsurface conditions may vary' away from these <br /> data'points No other warranty,�expres'sed or implied, is made as to the professional interpretations, <br /> opinions and recommendations contained in this report <br /> 1 ! <br /> I , <br /> I E r } <br /> I , ` <br /> I <br /> I I Advanced GBOERVIronmental,Inc <br /> r 7 f rf ! <br />