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26 June 2002 <br /> AGE-NC Project No 95-0141 <br /> Page 3 of 4 <br /> 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> Monitoring wells MW-1 through MW-8 were sampled on 17 May 2002,the analytical results of the <br /> ground water samples were as follows <br /> • TPH-g was detected in ground water samples collected from monitoring wells MW-1, <br /> MW-2, MW-3 and MW-6 TPH-g concentrations ranged from 370 micrograms per liter <br /> (gg/1) in MW-3 to 100,000 gg/1 in MW-1 (Figure 4) <br /> • BTEX compounds were detected in the ground water samples collected from the same wells <br /> at concentrations as high as 8,400 gg/1 benzene, 19,000µg/1 toluene,3,400µg/1 ethylbenzene <br /> and 14,000 gg/l xylenes, In sample MW-1, the areal extent of benzene is Illustrated in <br /> Figure 5 <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 (Figure 6) Concentrations ranged from 7 0 gg/l(MW-5)to 120 gg/1 (MW-8) 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 /> Tables 2, 3 and 4 The laboratory reports for the quarterly monitoring event (CTEL Laboratory IDs <br /> 0205-126-1 through 0205-126-8) QA/QC reports and chain-of-custody form are Included in <br /> Appendix B <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> The findings of the 17 May 2002 site Investigation events include the following <br /> • Measured ground water elevation is approximately 11 98 feet below MSL, and was inferred <br /> to flow radially outwards toward the southwest, south and southeast <br /> • Ground water was approximately 9 2 to 10 7 feet above the screened intervals of MW-1 <br /> through MW-5 and was approximately 40 feet above the screened interval of the deep well <br /> MW-6, since these wells were "drowned", they may not have yielded samples fully <br /> representative of ground water conditions near the top of the saturated zone where fuel <br /> hydrocarbons would be expected to have the greatest Impact <br /> • TPH-g was detected in ground water samples collected from four of the eight monitoring <br /> wells at the site (MW-1 through MW-3 and MW-6), at concentrations as high as <br /> 100,000 µg/1 <br /> Advanced GeoEnvironmental,Inc <br />