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1 ' 20 December 2002 . AGE-NC Project No 95-0185 ' Page 7 of 7 ' 0209270), quality control and quality assurance data (QA/QC) and chain-of-custody form are included in Appendix F ' 4.0. CONCLUSIONS ' Based on the data collected during this monitoring period, AGE concludes • Ground water flow at the time of the September 2002 ground water monitoring event was ' inferred to be radiating outward,from southwest to northwest,at a gradient of approximately 0 003 ft/ft • The concentrations of TPH-d and TPH-g in well samples MW-1 through MW-3 remained significant since the last monitoring event • Free product has been present in well MW-4 since the June 2002 ground water monitoring ' event • Soil does not appeared to be impacted in the area of well MW-5 5.0. RECOMMENDATIONS ' Based upon the results of the third quarter 2002 monitoring event, AGE recommends ' Continued quarterly ground water monitoring at the site for dissolved TPH-d, the next monitoring event is scheduled for December 2002 • Continued bi-monthly vacuum extraction of ground water and free product from well MW-4 ' 0 Implementation of an ozone air-sparging pilot test at the site to evaluate and potentially mitigate the dissolved TPH-d in the former UST area ' 6.0. LIMITATIONS Our 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 on T analytical results provided by an independent laboratory Evaluations of the geologic/hydrogeologic conditions at the site for the purpose of this investigation were made from a limited number of ' available data points(i a soil and ground water samples) and subsurface conditions may vary away • from these data points No other warranty, expressed or implied, is made as to the professional interpretations, opinions and recommendations contained in this report ' Advanced GeoEnvironmental,Inc