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'• 02 April 1998 AGE-NC Project No 95-0105 ' Page 3 of 3 The analytical results for the ground water samples are summarized in Table 2 -Analytical Results ' of Ground Water Samples The laboratory report(MAI Sample IDs 85230, 85231 and 85232),chain- of-custody form and QA/QC are included in Appendix B 4 0. CONCLUSIONS ' Based on data collected from the site, AGE concludes • The ground water flow direction is generally toward northwest The average ground water elevation increased 13 feet over the past quarter ' • During the entire period of monitoring well MW-4, the highest concentration of TPH-g has been at 43,000 ppb and the lowest was represented by this quarters s esults of 8,500 ppb Benzene has been detected at its highest concentration of 320 ppb and at a low concentration ' of 52 ppb in December 1996, currently benzene is present at 100 ppb • None of the analytes of interest were detected in MW-5 or MW-6, the down-gradient and . cross-gradient wells ' 50. RECOMMENDATIONS Based on present site conditions, AGE recommends Purged round water from previous investigations should be disposed at a licenced • g g P g ] treatment/disposal facility • If certified site closure is not achieved by 15 April 1998, AGE recommends that quarterly monitoring be scheduled 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 upon analytical results provided by an independent laboratory Evaluations of the geologic/hydrogeologic conditions at the site for the purpose of this investigation are made from .1 limited number of available data points (i a monitoring well 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 recommendations contained an this report Advanced GeaEnN irpnmental,Inc i