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1 <br /> I24 April 2003 <br /> • AGE-NC Project No 95-0143 <br /> rPage 3 of 4 <br />' 3 2 ANALYTICAL RESULTS OF WATER SAMPLES <br /> During the February 2003 monitoring event, TPH-g was detected In samples collected from <br /> monitoring wells MW-3, MW-9 and MW-22 at concentrations ranging from 65 gg/1 (MW-22) to <br /> 200,000 gg/l (MW-3) Various BTE&X compounds were detected In the same wells at <br /> concentrations as high as 5,400 gg/l of benzene, 57,000 µgll of toluene, 5,100 gg/1 of ethylbenzene <br /> and 29,000 go of xylenes, in sample MW-3 Figure 4 illustrates the approximate extent of TPH-g <br /> and benzene contamination in ground water <br /> MTBE was not detected in the analyzed ground water samples collected dunng the February 2003 <br /> sampling event <br /> Analytical results of ground water samples collected during the February 2003 monitoring event are <br /> summarized on Table 2 Analytical results of historical ground water samples are summarized on <br /> Tables 3 and 4 The laboratory report(MAI Lab IDs 0302327-001 through 0302327-005)and chain- <br /> of-custody forms are included in Appendix B <br /> lie 4.0. SUMMARY/CONCLUSIONS <br /> Based upon data collected from the site, AGE concludes <br /> • The average ground water elevation was 7 47 feet below mean sea level(MSL), an increase <br /> of 0 72 feet since the December 2002 monitoring event The inferred ground water flow <br /> direction was northeast at a gradient of approximately 0 001 foot/foot <br /> • Ground water was within the screened intervals of MW-10, MW-15, MW-16, MW-17, <br /> IMW-22, MW-23 and MW-24, but ranged from 0 32 feet to 5 88 feet above the screened <br /> interval in the other five monitoring wells <br /> • TPH-g and BTE&X compounds were detected in MW-3, MW-9 and MW-22 The highest <br /> concentration of TPH-g and BTE&X compounds in MW-3 were well above the above the <br /> DHS's Maximum Contaminant Levels for BTE&X in drinking water <br /> • MTBE was not detected in samples collected from the site during the February 2003 <br /> sampling event <br /> I <br /> 5.0. RECOMMENDATIONS <br /> Based upon data collected during the February 2003 and previous sampling events AGE <br /> Irecommends <br /> Advanced GeoEnvironmental,Inc <br />