ARCHIVED REPORTS_XR0012031 - Laserfiche WebLink

Home Browse Search

' 20 May 1998 • AGE-NC Project No 95-0130 ' Page 3 of 5 ' hydrocarbons would be expected to have the greatest Impact In March 1998, the gradient was calculated to be 0 005 ft/ft, or approximately 28 feet per mile ' (Figure 3) Ground water monitoring data collected in the area of NIW-1 through MW-5 suggests that the ground water flow direction was generally toward the northeast ' 3 2 DISSOLVED OXYGEN MEASUREMENTS During the March 1998 ground water monitoring event, dissolved oxygen measurements were recorded while purging the monitonng wells Dissolved oxygen measurements ranged from 6 7 percent (MW-4, V W-1 C) to 9 7 percent (MW-2) Results of dissolved oxygen In ground water samples are summarized In Table No 2. 33 LABORATORY RESULTS OF GROUND WATER SAMPLES • TPH-g was detected in ground water samples collected from wells MW-2, MW-3, MW-5, VW-1C, VW-2A and VW-3A at concentrations ranging up to 210,000 parts per billion (ppb, reported as micrograms per liter) BTE&X were detected in samples collected from wells MW-1 through MW-5,VW-IC,VW-2A and VW-3A at concentrations ranging up to 51,000 ppb (benzene, VW-2A) MTBE was detected utilizing EPA method 8020 In ground water samples collected from MW-1, MW-3, VW-1C, VW-2A and VW-3A at concentrations ranging up to 4,100 ppb MTBE was confirmed utilizing EPA method 8260 In ground water samples collected from MW-1, MW-3,V W- 1 C, VW-2A and VW-3A at concentrations ranging up to 3,700 ppb TBA was detected in ground water samples collected from MW-1 and MW-3 at concentrations ranging up to 30 ppb TAME and ETBE were not detected In the laboratory analysis of any ground water samples DIPE was confirmed utilizing EPA method 8260 in ground water samples collected from MW-2 for the first time The analytical results for ground water samples are summanzed In Table 3 4.0. DISCUSSION AND CONCLUSIONS Based upon data collected during the March 1998 monitoring, AGE concludes Advanced GeoEnvironmental,Inc