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r <br /> ' 22 June 2001 <br /> • AGE-NC Project No 98-0521 <br /> Page 2 of 4 <br /> ' of the purged water was measured using an ICM water analyzer (Appendix A) Purged water was <br /> stored on-site in 55-gallon, DOT-approved drums <br /> ' 2 2 COLLECTION OF GROUND WATER SAMPLES <br /> ' Prior to collection of ground water samples,the depth to ground water was again measured in each <br /> well to ensure that a minimum of 80%of the initial well volume had recharged Water samples were <br /> collected from each well using a new disposable plastic bailer and were transferred into three chilled <br /> ' 40-m1 volatile organic analysis(VOA)vials containing 0 5 ml hydrochloric acid(18%) as a sample <br /> preservative The samples were then labeled and placed in a chilled container for transportation <br /> under chain-of-custody to McCampbell Analytical,Inc,a California Department ofHealth Services <br /> (DHS)-certified laboratory <br /> ' 2 3 GROUND WATER SAMPLE ANALYSIS <br /> Ground water samples were analyzed for the following <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g ) in accordance with EPA <br /> ' Method 8015 Modified, <br /> • Volatile aromatic hydrocarbons-benzene,toluene,ethyl benzene and total xylene(BTEX) <br /> ' and methyl tertiary-butyl ether(MTBE) in accordance with EPA methods 8020, <br /> Oxygenated compounds - di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br /> MTBE, tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), methanol, ethanol, <br /> I ' ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA <br /> Method 8260B <br /> I <br /> 3.0. -FINDINGS <br /> tThe ground water flow direction and gradient were inferred from the surveyed well-casing elevation <br /> data Dissolved petroleum hydrocarbon impact to ground water was assessed by laboratory analysis <br /> ' of the samples collected <br /> I <br /> Advanced GeoEnveronmental,Inc <br />