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23 February 1998 <br /> AGE-NC Project No 95-0130 <br /> Page 3 of 5 <br /> (Figure 3) Ground water monitoring data collected in the area of MW-1 through MW-5 suggests that <br />' the ground water flow direction was generally toward the northeast <br /> 3 3 LABORATORY RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was detected in ground water samples collected from wells MW-1 through MW-3, MW-5, <br /> V W-1 C, VW-2A and VW-3A at concentrations ranging up to 280 000 parts per billion (ppb, <br /> reported as microgianns per liter) <br /> BTE&X were detected in samples collected from each well at concentrations i anging up to 51 000 <br /> ppb (xylenes, VW-1C) Benzene was detected in ground water samples collected from wells MW-1 <br /> Ithrough MW-3 MW-5 VW-1C VW-2A and VW-3A at concentrations ranging up to 47 000 ppb <br /> MTBE was detected utilizing EPA method 5020 in ground water samples collected from 'AW-1 <br /> MW-3 VW-lC VW-2A and VW-3A at concentrations ranging up to 3,400 ppb MTBE was <br /> confirmed utilizing EPA method 8260 in giound water samples collected from N4W-3, VW-1C, VW- <br /> 2A and VW-3A at concentrations iangiing up to 3 400 ppb <br /> TBA vias detected i n ground ,,\atei samples collected from MW-2 MW-3 MW-5, VW-1C, VW-2A <br /> and VW-3A at concentrations ranging up to 1 700 ppb TAME D1PE and ETRE were not detected <br /> Iin the laboi atoi N, analysis of any~giound N\ater samples The anal},tical i esults for giound water <br /> samples are sunnmaiized in Table 3 <br />' <br /> 40 DISCUSSION AN 1 <br /> D CONCLUSIONS <br /> Based upon data collected dining the December 1997 monitoring AGE has the following <br /> conclusions <br />' • In Decembei 1997, the 4aradient was appiommately 0 006 ft/ft or approaimatel-, 3I feet per <br /> male <br /> f • Ground «iter flow dii ection on the site was estimated to be toward the northeast in the area <br /> of\A,el is MW-1 throush MW-5 <br /> • The giound dater suiface elevation at the site continues to remain above the slotted scieened <br /> intervals in N\ells MW-1 through MW-5 Therefoie samples collected from these wells may <br /> not be iepiesentatne of actual surface ground water dissolved petioleum hydrocalbon <br /> concentrations <br /> • TBA continues to be detected in water samples collected from MW-3 and MW-5 TBA was <br /> 4dtanred(.cui nirommtn1A1 he <br />