ARCHIVED REPORTS_XR0002528 - Laserfiche WebLink

Home Browse Search

' 26 November 2002 • AGE-NC Project No 95-0184 ' Page 3 of 5 ' 32 ANALYTICAL RESULTS OF WATER SAMPLES TPH-g was detected in all of the sampled monitoring wells at concentrations ranging from ' 120 micrograms per liter(µg/1)in MW-3 to 210,000µg/1 in VW-2B (Figure 3) TPH-d was detected in the sample from MW-4 at a concentration of 9 644v r '� jQ3 ' With the exception of ground water sample MW-3, BTEX compounds were detected by EPA Method 8260 in all ground water samplis analyzed The maximum concentrations found were 37,000 µg/1 benzene in sample VW-2B and 38,000 µg/1 toluene, 4,400 µg/1 ethylbenzene and ' 20,900µg/1 total xylenes in sample VW-5B Maps ofBTEX concentrations are provided as Figures 4 and 5 ' MTBE was detected by EPA Method 8260 in three samples at concentrations of ranging from 22 µg/1(VW-5C)to 510 µg/l (VW-4),none of the other oxygenated volatile organics were detected at concentrations above laboratory reporting limits A map of MTBE concentrations is provided in ' Figure 6 ' • The lead scavenger 1,2-dichloroethane(1,2-DCA)was detected in samples MW-2,VW-2B,VW-3, VW-4 and VW-5C, at concentrations ranging from 5 7 µg/1(MW-2)to 750 µg/1(VW-2B),the lead scavenger 1,2 dibromoethane(EDB)was detected in samples VW-2B and VW-5B at concentrations of 400 µg/l and 220 µg/1, respectively A map of 1,2-DCA and EDB concentrations is provided in ' Figure 7 ' Six additional constituents were detected by FYPA Method 8260 at the following maximum concentrations, naphthalene 1,000 µg/l (VW-4), 1,2,4-tnmethylbenzene 2,700 µg/1 (VW-5B), n- propylbenzene1400µg/l(VW-5C), 1,3,5 tnmethylbenzene 710µg/1(VW-5B),isopropylbenzene 140 ' µg/1 (VW-5C) and n-butylbenzene 120 µg/1 (VW-4) f Analytical results of ground water samples are summarized on Tables 2 and 3 Copies of the ' laboratory report (CTEL ID 0206-059-1 through 0206-059-10) and chain-of-custody forms are in Appendix B ' 4.0. SUMMARY AND CONCLUSIONS ' Based upon data collected from the site, AGE concludes the following • Ground water elevations at the site ranged from 19 89 to 20 35 feet below MSL All ground ' water monitoring wells except VW-5B were "drowned", ground water levels were as high . as approximately 22 feet above the screened intervals of the drowned wells ' Advanced GeoEnvironmental,Inc 1