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r14 November 2005 <br /> AGE-NC Project No 03-1100 <br /> r , Page 2 of 4 <br /> labeled, 55-gallon Department of Transportation(DOT)-approved drums pending proper disposal <br /> E 7 i <br />' <br /> ' 22 " COLLECTION OF GROUND WATER SAMPLES J11 3 <br /> Water samples were collected from the purged wells using new, disposable plastic bailer`s after <br /> r allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each water <br /> sample was transferred into four 40-milliliter(ml)volatile organic analysis(VOA)vials containing <br /> 0 5 ml 18%hydrochloric acid solution as a sample preservative(note 3 VOA vials were taken from <br /> r MW-3) After collection, the samples were properly labeled, placed in a chilled container, and <br /> transported under chain of custody to Cal Tech Environmental Laboratories, Inc (CTEL) for <br /> analysis The samples were analyzed for r <br /> - <br />' Totalp etroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified, <br /> • Benzene, toluene, ethylbenzene, and xylenes (BTEX) in accordance with EPA Method <br /> 8260B, and <br /> 1 � • Fuel oxygenates methyl tertiary-butyl ether (MTBE), di-isopropyl ether (DIPS), ethyl <br /> tertiary-butyl ether(ETBE),tertiary-amyl methyl ether(TAME),tertiary butanol(TBA), 1,2- <br /> dichloroethane(1,2-DCA),and ethylene dibromide(EDB)in accordance with EPA Method <br /> 8260B <br /> 3.0. FINDINGS <br /> h <br /> y r • <br />' Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 02 September 2005 The contaminant impact to groundwater was quantified by laboratory analytical <br /> 'data <br /> 3T__ GROUND WATER GRADIENT AND FLOW DIRECTION- " T� <br /> At the time of the September 2005 sampling event, depths to ground water ranged from 42 38 feet <br /> to 43 87 feet below the t tops of the well casings, indicating that the wells are screened properly and yield representative shallow ground water samples <br /> Ground water elevation'at the site ranged from 22 92 feet below mean sea level (MSL) in well <br /> MW-7 to 23 54 feet below MSL in well MW-2 (Table 1) The ground water elevation at the site <br /> decreased an average of 0 78 feet between the May 2005 and September 2005 monitoring events ' <br /> Advanced GeaEnvironmental,Inc <br /> 1 <br /> 1 + t <br /> f 1 <br />