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I ' 07 February 2000 AGE-NC Project No 95-0143 ' Page 4of5 ' in order to achieve even minimal flow from these wells Organic vapor was measured at concentrations as high as 1,329 ppm In the extracted air stream (VW5) ' Due to the limited operational period during the current quarter, calculations for the mass of gasoline removed are not included In this report However, preliminary calculations indicate a removal rate of approximately 5 6 gallons of gasoline per day Calculations for the total mass of hydrocarbons ' removed will be included in the quarterly report for February 2000 ' 4.0. SUMMARY/CONCLUSIONS Based upon data collected from the site, AGE concludes ' Ground water elevation decreased approximately one foot between August and November 1999 The inferred ground water flow direction remains towards the north to northeast at the ' site • Petroleum hydrocarbon concentrations increased in MW-3 and MW-6, remaining within �. historic concentrations Hydrocarbon concentrations decreased in wells MW-7 and MW-9 Hydrocarbon were not detected in samples collected from wells MW-10, MW-14, MW-15, MW-16 and MW-17 Measurable free product was not encountered during the November 1999 monitoring event • Operation of the SVE and IAS units was initiated on 03 November 1999 The SVE units extracts approximately 278 cfm with an LEL of 5 to 6 percent The sparging system supplies approximately 20 cfh of air to each sparging well ' 5.0. RECOMMENDATIONS ' Based upon data collected during the August 1999 and previous sampling events,AGE recommends • Continued quarterly monitoring of the monitoring well system on the site The next quarterly monitoring will be scheduled for February 2000, concurrent with monitoring at the Madison site • Continued operation and monitonng of the SVE and IAS systems at the site i Advanced GeoEnvironmental,Inc