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10 September 2002 • AGE-NC Project No 95-0184 IPage 3 of 5 32 ANALYTICAL RESULTS OF WATER SAMPLES TPH-g was detected in all of the sampled monitoring wells at concentrations ranging from 53 micrograms per liter(µg/1)in MW-3 to 160,000 µg/1 in VW-5B(Figure 3) TPH-d was detected I in the sample from MW-4 at a concentration of 6 8 pe J' a 03 � mo�ltr X11 VV-S41TEX compounds were detected in all the ground water samples analyzed The maximum benzene and xylenes concentrations were detected in sample VW-213 at 30,000 µg/1 and 22,000 µg11, respectively, the maximum toluene and ethylbenzene concentrations were detected in sample VW-5B at 28,000 µg11 and 3,800 µg/1, respectively A map of BTEX concentrations is provided in Figures 4 and 5 MTBE was detected by EPA Method 8260 in three of the samples, at concentrations ranging from 6 8 µg/1 (MW-2)to 730 µg/1(VW-4�, none of the other oxygenated volatile organics were detected at concentrations above laboratory reporting limits - S)LP6 v)A5 �D u r� `p ri rf1 W'3 ;a. I.$ .' The lead scavenger 1,2-dichloroethane(1,2-DCA)was detected in samples MW-2,MW-4„,VW-2B, < s_- • VW-3 and VW-4 at concentrations ranging from 6 1 µg/1(MW-2)to 1,100 µg/l(VW-2B),the lead scavenger 1,2 dibrom�pethane(EDB)was detected in samples VW-2B and VW-5B at concentrations of 3501gg/1 and 290 µg/l, respectively iSix additional constituents were detected by EPA Method 8260 at concentrations as high as 3,400 µg/1 (1,2,4-tnmethylbenzene, in sample VW-5B) Naththalene was detected in samples MW-1, MW-2, MW-4, W-2B, VW-3, VW-4, VW-5B and VW-5C at a maximum concentration of 4% 1,800 gg/1 (VW�B), and n-propylbenzene was detected in all samples at concentrations ranging from 2 1 µg/1 (MW-3) to 420 µg/1 (VW-4)-1sopropylbenzene was detected at a maximum concentration of 130µg/1 (VW-213)n-butyl benzene was detected at a maximum concentration of 6 1µg/l (MW-1) and 1,3,5 Trimethylbenzene was detected at a maximum concentration of 890µg11 (VW-5B) Analytical results of ground water samples are summarized on Tables 2 and 3 Copies of the laboratory report (CTEL ID CT214-0112107) 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 IGround water levels were as high as approximately 22 feet above the screened intervals of . all the momtoi ing wells The groundwater gradient ranged widely,from 0 013 ft/ft along the Advanced GeoEnvironmental,Inc