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I1'5 December 2003 AGE-NC Project No 98-0448 ' Page 5 of 9 , 4.0. FINDINGS ' AGE determined ground water flow direction and gradient from the field data collected on 18 r ' September 2003, the contaminant impact to ground water was assessed from the laboratory data From field data collected at the SVE remediation system between 23 June 2003 and 09 October ' 2003,AGE determined the average TPH-g concentration and the average flow rate and calculated the approximate mass and volume of hydrocarbons removed 4 1 GROUND WATER ELEVATION AND GRADIENT 4„ „ ' The depths to ground water were measured at between 19 15 and 22 57 feet below the tops of the well casings (Table 2) Ground water elevations at the site were calculated to be between 9 90 feet (MW-4A) and 13 16 feet (MW-4B) below mean sea level (Table 2), ground water elevations are depicted in Figure 3 Ground water elevation at the site decreased an average 142 feet between the June 2003 and the September 2003 ground water monitoring events • The ground water flow direction at the site was inferred to be southwest at an approximate adient �' � pp 1� of 0 011 ft/ft - 412 LABORATORY RESULTS OF GROUND WATER SAMPLES ' TPH-g was detected in water samples collected from wells MW-2 at a concentration of 200 T i micrograms per liter (µg/1) The inferred extent of dissolved TPH-g is depicted in plan view in ' Figure 4 BTEX compounds were detected in the water sample collected from MW-2 at concentrations of ' 14 µg/1 benzene; 3'1 gg/l toluene, 8 6 µg/1 ethylbenzene and 174 µg/1 xylenes No other fuel components were detected by laboratory analysis Previous,arid current analytical - ' results of ground water monitoring well samples are summarized in Tables 3 and 4 The laboratory reports (CTEL Project No CT214-0309114) and chain-of-custody, forms are presented in Appendix C t 4 , I ' Advanced GecEnvironmental,Inc