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lie <br />' 05 September 2002 <br /> AGE-NC Project No 95-0141 <br /> Page 3 of 5 <br />' <br /> 32 ANALYTICAL <br /> RESULTS FROM GROUND WATER SAMPLES <br />' Monitoring wells MW-1 through MW-8 were sampled on 05 August 2002, wells MW-1 through <br /> MW-5 were "drowned", and may not have yielded samples fully representative of ground water <br /> conditions near the top of the saturated zone where fuel hydrocarbons would be expected to have the <br />' greatest impact <br /> IThe analytical results of the ground water samples were as follows <br /> • TPH-g was detected in ground water samples collected from monitoring wells MW-1, <br /> I MW-2, MW-3 and MW-6 TPH-g concentrations ranged from 660 micrograms per liter <br /> (µ9/1) in MW-2 to 69,000 99/1 in MW 1 BTEX compounds were detected in the ground <br /> water samples collected from the same wells at concentrations as high as 11,000 gg/1 <br /> benzene(MW-1), 14,000 jig/ltoluene(MW-1),2,700 gg/1 ethylbenzene(MW-1) and 11,400 <br /> gg/l xylenes (MW 1) 4 <br /> • Fuel oxygenates were not detected in the ground water samples collected from the site <br /> • 1,2-DCA was detected in ground water samples collected from all monitoring wells except <br /> MW-1 and MW-4 Concentrations ranged from 6 0 p <br /> g µfill (MW 5) to 61 µg/1(Mw-7) EDB <br /> was not detected in the ground water samples collected from the site <br /> Laboratory results of water samples analyzed for petroleum hydrocarbons are summarized in <br /> I Tables 2, 3 and 4 The laboratory reports for the quarterly monitoring event(CTEL Laboratory IDs <br /> 0208-020-1 through 0208-020-8) QA/QC reports and cham-of-custody form are included in <br /> Appendix B <br />' The areal extent of TPH- <br /> g, benzene and 1,2-DCA impacted ground water is illustrated on Figures 4, <br /> 5 and 6, respectively <br /> I4.0• SUMMARY AND CONCLUSIONS <br /> The findings of the 05 August 2002 site investigation events include the following <br /> • Measured ground water elevation is approximately 12 85 feet below msl, and was within the <br /> screened interval of the two shallow monitoring wells (MW-7 and MW-8) Ground water <br /> I was approximately 8 3 to 9 9 feet above the screened intervals of MW-1 through MW-5 and <br /> was approximately 39 feet above the screened interval of the deep well MW-6 <br /> Advanced GeoEnvironmentaL Inc <br />