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1 <br /> 1 10 February 2005 <br /> AGE-NC Project No 98-0521 <br /> ' Page 6 of 6 <br /> • During the third quarter 2004, the interim ground water extraction system treated a total <br /> ' volume of 66,760 gallons or 253,020 liters of discharged water <br /> • TPH-g, xylenes and MTBE were detected in the influent ground water sample collected on <br /> 1 06 August 2004 at concentrations of 450µg11, 17 1 pg/l and 48 µg11,respectively,TPH-g and <br /> MTBE were detected in the influent ground water sample collected on 15 September 2004 <br /> at concentrations of 200 µg11 and 190 µg11, respectively No analytes of concern were <br /> 1 detected at or above laboratory reporting limits in the collected effluent samples <br /> • The ground water remediation system successfully removed 0 18 lbs of TPH-g and 0 065 lbs <br /> 1 of MTBE <br /> ' S.O. RECOMMENDATIONS <br /> Based on the results of this investigation,AGE recommends <br /> ' water monitoring at the site The next quarterly monitoring event is <br /> Continuation of ground a g q Y <br /> scheduled for 16 February 2005, and <br /> 1 • Continued operation and maintenance of the interim ground water extraction system in order <br /> to minimize the migration of TPH-g and MTBE, however, the ground water extraction <br /> i problem at well MW-4 (UST location) must be fixed to prevent lateral migration of the <br /> contaminant plume towards the peripheral extraction well MW-2 <br /> 1 <br /> 6.0. LIMITATIONS <br /> 1 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 /> 1 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(i a soil samples,monitoring wells and ground water samples),and subsurface <br /> 1 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 /> i <br /> 1 <br /> 1 Advanced GeoEnvironmentai,Inc <br />