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I <br /> 1 i ; <br /> i SII <br /> ' 02 March 2005 ' <br /> AGE-NC Project No 97-0333 <br /> ' Page 10 of 10 ` <br /> may have been induced by a ground water cone of depression created by the ongoing ground <br /> ' water extraction activities'(Figure 10)� <br /> 5.0 RECOMMENDATIONS <br /> 1y <br /> Based upon data collected from the site, AGE recommends <br /> • ` Continued quarterly ground water monitoring and sampling of monitoring wells MW-1 <br /> ' through MW-13 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 areaofwells EW-1,MW-1,MW-2,MW-3,MW-6,and MW-7A,outside ofthe dissolved MTBE <br /> core area,only low to very low MTBE concentrations have been detected on-site and off-site toward <br /> the north (MW-12B) in First Zone and Second Zone Based on the data collected during the fourth <br /> quarter 2004, additional ground water monitoring wells are not warranted at this time and the <br /> existing monitoring well network may be sufficient to complete a site Problem Assessment Report <br /> (PAR) <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 <br /> ' upon analytical results provided by an independent laboratory Evaluations of the hydrogeologic <br /> 'conditions at the site for the purpose of this, investigation are made from a limited number of <br /> available data points (1 e ground water samples), and subsurface conditions may vary away 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 /> ' t <br /> ' Advanced GeoEnvironmental,Inc <br />