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I ' <br /> 11 December 2000 <br /> AGE-NC Project No 97-0333 <br /> ' Page 2 of 5 <br /> 32 GROUND WATER SAMPLING <br /> Following well purging, ground water levels in the monitoring wells were allowed to achieve a <br /> minimum of 80 percent recharge prior to sample collection Ground water samples were collected <br /> from the purged wells utilizing new,disposable polyethylene bailers, one 1-liter amber bottle without <br /> a preservative and three 40-m1 EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid <br /> ' as a preservative Care was taken to ensure that visible air bubbles were not present in the vials after <br /> filling and capping Ground water sample containers were labeled with the well designation, date, <br /> time, and sampler's initials <br /> I ' <br /> 3 3 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> Each ground water sample was logged on a chain-of-custody form, placed in a chilled container and <br /> transported to a DHS-certified laboratory for analysis for <br /> ' Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d <br /> , <br /> ' respectively) by EPA Methods 8015M/5030 and 8015M/3550, respectively, <br /> Volatile aromatic compounds - bcn7cnc, toluciic, ethyl hen,,Lou Lmd XyIL11L (BTF:X) "itlr <br /> methyl-tertiary butyl ether (MI-BE) by EPA Method 8020, <br /> • Fuel oxygenated compounds - tertiary butanol (TBA), di-isopropyl ether (DIPS), ethyl tert <br /> butyl ether (ETBE), tert amyl methyl ether(TAME), methanol, ethanol and MTBF by EPA <br /> Method 8260M, and <br /> • FLhylenc drbromrde (EDB) and 1,2-dichloroethane (1,2-DCA) by FPA Method 8260\1 <br /> 30 FINDINGS <br /> Ground eater elevation, now direction and gradient werc determined From field data collected or <br /> 31 October 2000, the contaminant impact to ground �kkater \ti as assessed from the. ground \,,atL1 <br /> laboratory- data <br /> 3 1 RF1 A-1 1\11 GTROt1ND Vl A I FR FI-F\ A I ION AND GRADIF NI <br /> 1 hL depths to ground v' atLr In v, ells '411\ -1 M\\-2 '411\ -3 MW 4 and '\111 5 measur,.d <br /> ' hLt�1 CL1-1 i 6 36 gild 17 ds ILLt h(_10"" V`-- 10p7 Ol " Lll Cd' 5 L!'OLMILI 1" Lt.(-- LIL\aLivIZ`r X%Irk <br /> Id .rrt<<r!l �iF snt�u�tinur� 1 , <br />