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(w itl <br /> • 19 July 2004 <br /> AGE-NC Project No 95-0109 <br /> Page 6 of 7 <br /> 33 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> No analytes were detected above laboratory limits in the ground water samples collected from wells <br /> MW-20, MW-21 and MW-22 on 19 April 2004 The analytical results from the April 2004 <br /> monitoring event are presented in Table 2 The laboratory report (MAI Work Order 0404303) and <br /> chain-of-custody forms are Included in Appendix F <br /> TPH-g was detected in ground water samples from wells MW-8, MW-9 and MW-14 at <br /> concentrations ranging from 220 micrograms per liter(µg/1)in MW-14 to 2,400 µg/1 (MW-9) One <br /> or more BTEX compounds were detected in the samples from the same wells at concentrations as <br /> high as 11 µg/1 benzene (MW-14), 3 2 µg11 toluene (MW-14), 180 µg/1 ethylbenzene (MW-9) and <br /> 48 3 µg/1 total xylenes (MW-8) <br /> 1,2-DCA was detected in samples collected from wells MW-8,MW-9,MW-11,MW-14 and MW-16 <br /> at concentrations ranging from 2 1 µg/1 (MW-8) to 17 µg/1 (MW-14) No additional analytes were <br /> detected above laboratory limits in the ground water samples collected <br /> The analytical results from the June 2004 monitoring event are presented in Table 2 Historical <br /> analytical results are summarized in Table 3 The approximate extent of dissolved TPH-g,benzene <br /> and 1,2-DCA are depicted in Figures 4, 5 and 6 The laboratory report (CTEL Project Number <br /> CT214-04062857) and chain-of-custody forms are Included in Appendix G <br /> 4.0. DISCUSSION AND CONCLUSIONS <br /> Based upon data collected from the site, AGE finds <br /> • Generally, sandy silt and clayey silt was encountered from surface grade to 13 feet bsg Silty <br /> sand,sand and gravelly sand was encountered from 13 feet bsg to above 25 feet bsg Clayey <br /> silt was encountered in most bonngs around 25 feet bsg Sandy silt, silty sand and sand was <br /> encountered below 25 feet bsg to near 40 feet bsg Clayey silt was generally encountered in <br /> all borings around 40 feet bsg Below 40 feet bsg to total depth,soil was generally silty sand, <br /> sandy silt and sand <br /> • Ground water on-site was inferred to be flowing towards the south The ground water <br /> gradient ranged from 0 002 ft/ft on-site too 005 ft/ft off-site <br /> • TPH-g was detected in ground water samples from wells MW-8, MW-9 and MW-14 at <br /> concentrations as high as 2,400 µg/1 (MW-9) <br /> Advanced GeoEnvironmental,Inc <br />