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• 18 June 2004 <br /> AGE-NC Project No 99-0559 <br /> Page 3 of 8 <br /> 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Prior to ground water sampling,the ground water level in each well was measured to insure that the <br /> well achieved a minimum of 80 percent recharge Following depth measurement, ground water <br /> samples were collected from wells MW-5A through MW-8E utilizing 3/8-inch diameter <br /> polyethylene tubing,and from wells MW-1 throughMW-4 utilizing disposable polyethylene bailers <br /> The ground water samples were transferred into three 40-ml EPA-approved volatile organic analysis <br /> (VOA) vials containing 0 5 ml 18%hydrochloric acid as a sample preservative, care was taken to <br /> ensure that visible air bubbles were not present in the vials after filling and capping Ground water <br /> sample containers were properly labeled, placed in a chilled container and transported under chain- <br /> of-custody protocol to CalTech Environmental Laboratories (CTEL), a California Department of <br /> Health Services-certified laboratory, for analysis The ground water samples were analyzed for the <br /> following <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified, <br /> • Benzene, toluene, ethylbenzene and xylene (BTEX) and the fuel additives tertiary butanol <br /> (TBA), di-isopropyl ether (DIPE), ethyl tert-butyl ether (ETBE), tert-amyl methyl ether <br /> . (TAME), methyl tertiary- butyl ether (MTBE), ethyl-dibromide (EDB) and 1,2- <br /> dichloroethane (1,2-DCA) in accordance with EPA Method 8260B <br /> 23 FREE PRODUCT REMOVAL <br /> Free product was encountered in well MW-2 during the first quarter 2004 monitoring event only in <br /> well MW-2 and was when measured and removed using a disposable bailer The removal was <br /> performed in a accordance with California Underground Storage Tank Regulations, Article 5, <br /> Section 2655 After removal,the water and free product were stored on-site in 55-gallon DOT H-17 <br /> storage drums <br /> 3.0. FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected <br /> during the first-quarter monitoring event, the contaminant impact to ground water was quantified by <br /> laboratory analysis of the ground water samples <br /> i <br /> Advanced GeaEnvironmental,Inc <br />