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1 <br />' 01 April 2004 <br /> AGE-NC Project No 02-0950 <br />' Page 6 of 9 <br />' No CT214-0310101 and CT214-0310120), quality assurance and quality control (QA/QC) report <br /> and chain-of-custody forms are included in Appendix D Cross sections showing the extent of sorbed <br /> soil contamination are provided in Figures 5 and 6 <br /> I <br /> 3 3 ANALYTICAL RESULTS OF GRAB GROUND WATER SAMPLE <br /> IOne "grab" ground water sample (B4-H20) was taken from boring B4 at an approximate depth of <br /> 53 feet bsg and was analyzed for TPH-g, TPH-d, BTEX, five fuel additives and lead scavengers <br /> TPH-g and TPH-d were detected in the ground water sample collected from boring B4 at a <br /> concentration of 14,000 micrograms per liter(gg/1) and 11,000 µg/1, respectively <br />' Benzene,toluene,ethY lbenzene and total xylenes were detected in the ground water sample collected <br /> from boring B4 at concentrations of 11 µg/1, 260 gg/l, 430 µg/1 and 2,650 gg/l, respectively <br /> I The lead scavenger 1,2-DCA was detected in the ground water sample collected from boring B4 at <br /> g � p g <br />' concentration of 2 2 gg/1 <br /> No additional analytes were detected at or above laboratory detection limits in the sample analyzed <br />' Analytical results of groundwater are summarized on Table 2 The laboratory reports(CTEL Project <br /> No CT214-0310094), quality assurance and quality control (QA/QC) report and chain-of-custody <br /> forms are included in Appendix D Cross sections showing the extent of dissolved ground water <br /> contamination are provided in Figures 7 and 8 <br />' 3 4 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the October 2003 sampling event,depths to ground water ranged from 20 01 (MW-3) <br />' feet to 20 72 (MW-1) feet below the tops of the well casings Ground water elevation at the site <br /> averaged approximately 12 53 feet below mean sea level (MSL)(Table 3) During this monitoring <br /> event, the ground water levels in the wells were at least six feet below the tops of the well screens, <br />' indicating that the wells are screened properly to yield representative shallow ground water samples <br /> Ground water flow was inferred to be flowing towards the north-northeast with an average hydraulic <br /> Igradient of 0 014 foot/foot Figure 9 illustrates the contoured ground water elevations as measured <br /> on 21 October 2003 <br /> I <br /> • <br /> Advanced GeoEnvironmental,Inc <br /> I <br />