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�•• � ' s ' l J V Y r ' <br /> I _ <br /> y <br /> 10 January 1998 <br /> AGE-NC Project No ,95-0142 <br /> Page 3'of 5 <br /> The inferred ground water flow direction varies from northeast to southeast,but is directed generally <br /> Itoward the east from TKI-90 The relative ground water elevation data is depicted in Table 1 The <br /> relative elevation of ground water surface"at the site is illustrated on Figure 3 <br /> r <br /> 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br />' 3 2 1 Chemical Analysis <br />' TPH-g was detected in samples collected from wells V W-1 through VW-4 at concentrations ranging <br /> from 240 to 140,000 parts per billion(ppb, reported as micrograms per liter)`BTE&X compounds <br /> were detected in samples from each vapor well at concentrations as high as 33,000 ppb (toluene, _ <br />' VW-1) Benzene was detected in VW-I at a concentration of 24,000 ppb <br /> TPH-g was detected in the samples collected from wells MW-4 and MW-5 at concentrations of 78 <br />' and 240 ppb, respectively Detectable concentrations of BTE&X compounds were present in the <br /> sample from MW-4 Toluene and xylene were detected at concentrations of 0 66 and 1 2 ppb, <br /> respectively Each BTE&X compound was detected in the samples collected from well MW-5, at <br /> concentrations as high as 2 1 ppb (benzene) <br />' MTBE was detected in water samples collected from vapor wells VW-1, VW-3 and VW-4 at <br /> concentrations as high as 340 ppb (VW-1) by EPA method 8260m MTBE was not detected in the <br /> sample collected from MW-5 or MW-4, down gradient wells, however TBA was detected in the <br />' sample from well MW-4 at 25 ppb <br /> Analytical results for the ground water samples as analyzed by EPA Methods 8015 and 8020 are <br />' summarized in Table 2 Analytical results for the ground water samples as analyzed by EPA Method <br /> 8260 are summarized in Table The laboratory report (MAI Laboratory I D Nos 84178 through <br /> 84184), chain-of-custody and QA/QC report are included in Appendix B <br /> 3 2 2 Bio-Enumeration and Physicochemical Analyses <br />' Samples collected from vapor well VW-1 and MW-5 were analyzed for bio-enumeration and <br /> physicochemical characterization by A. Keith Kaufman,,M S <br /> It was found that the two samples contained extremely low microbiological populations, although <br /> the selective biodegraders detected in sample VW-1 comprised the complete population of <br /> organisms detected <br /> Advanced GeoEnvironmental,Inc <br />