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12 December 2005 <br />AGE -NC Project No 03-1055 <br />Page 6 of 6 <br />4.0. SUMMARY AND CONCLUSIONS <br />Based on the data collected from the site, AGE concludes <br />• Three new ground water monitoring wells, MW -8 through MW -10, were installed to 20 feet <br />bsg, developed, surveyed and sampled Each well was screened from 5 to 20 feet bsg <br />• TPH-g was detected in the ground water sample collected from well MW -8 at a <br />concentration of 1,300 µg11 <br />• Benzene, toluene, and total xylenes were detected in the ground water sample collected from <br />MW -8 at concentrations of 24 pg/l, 7 4 µg/1, 22 µg/l, and 43 6 µg/1, respectively ' <br />• Ground water flow was inferred to be generally flowing towards the north under an average <br />hydraulic gradient of approximately 0 0055 ft/ft <br />�XI��9LrL��u i � 1 �!! 1�. l��IJ►F.a <br />. Based on the findings of the environmental activities recounted in this report, AGE recommends the <br />continuation of the quarterly monitoring program, the next monitoring event should be performed <br />in December 2005 <br />• <br />With the addition of three monitoring wells, MW -8 through MW -10, lateral extent of the <br />contamination appears to be sufficiently characterized in all directions with the exception of west <br />Well MW -8, the most westerly located of the six wells, was the only well impacted this quarter If <br />concentrations of TPH-g and BTEX in well MW -8 decrease or are static through the next few <br />quarters of monitoring, then the site should be considered for closure <br />G.O. LINIITATIONS <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 geologic/hydrogeologic <br />conditions at the site for the purpose of this investigation was made from a limited number of <br />available data points (soil and 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 />Advanced GeoEnvironmental, Inc <br />