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' 11 November 2002 • , AGE-NC Project No. 98-0468 Page 4 of 4 ' 4A. . SUMMARY/CONCLUSIONS The following summary points and conclusions were drawn from the results of the site investigation: ' During this monitoring event, the depth to ground water in the sampled, shallow wells was within the well screen intervals. Ground water elevation in the monitoring wells decreased an average of 1.3 feet since the previous monitoring event. 1 Based on ground water elevation data, ground water flow direction is inferred to be toward the northeast. Ground water.gradient for September 2002 was calculated to be 0.019. ' MTBE ted iI the ground water samples collected from well MW-4,MW-6,MW-7, -and ells:16und 9 A MW-10 by EPA Method 8260. The down-gradient extent of MTBE- imp water has been delineated to the DHS-established maximum contaminant level (MCL) of 5 gg/l for MTBE in ground water. 1 5.0. RECOMMENDATIONS 1 Based upon data collected at the site, AGE recommends continued quarterly ground water .monitoring of all well on the site; the next quarterly monitoring event is scheduled for early ' December 2002. ' 6.0. LIMITATIONS AGE's professional services were performed using that degree of care and skill ordinarily exercised by environmental consultants practicing in this or similar localities. The findings were based upon 1 analytical results provided by an independent laboratory. Evaluations of the 'hydrogeologic conditions at the site for the purpose of this investigation were made from a limited number of ' available data points(i.e., monitoring well ground water samples) and subsurface conditions may vary beyond these data points. No other warranty, expressed or implied, is made as to the professional interpretations, opinions and recommendations contained in this report. ' Advanced GenEnvironmental,Inc.