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u p I <br /> v <br /> i t <br /> F I <br /> 11 January 2002 <br /> i AGE-NC Project No 99-0592 <br /> A I <br /> Page 2 of 4 <br /> 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Water samples were collected from monitoring wells MW-2, MW-3 and MW-4 using new plastic <br /> bailers A water sample was collected from domestic well DW-1 after the well purge valve was <br />' opened and water was allowed to run until the pump turned on The samples were transferred Into <br /> laboratory-supplied 40-mf EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as <br /> a sample preservative and Into one 1-liter amber bottle without a sample,preservative The sample <br />' containers were then labeled with well designation,date,time of sampling and the sampler's initials <br /> The samples were transported in a chilled container under chain-of-custody to MAI for analysis The <br /> samples were analyzed for <br />' Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Method 8015 modified, ' <br /> 1 Benzene,toluene, ethylbenzene and total xylenes (BTEX) and the oxygenated ether methyl <br /> tertiary butyl ether(MTBE) in accordance with EPA Method 8020, and <br />' Volatile organic compounds and fuel oxygenates - MTBE, dl-Isoproply ether(RIPE), ethyl <br /> tertiary butyl ether (ETRE), tertiarty amyl methyl ether (TAME), tertiary butanol (TBA), <br /> methanol, ethanol, ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in <br /> Pb accordance with EPA Method 8260 modified <br />' <br /> 23 WASTE DISPOSAL - <br />' On 16 November 2001,approximately 300 gallons of non-hazardous purge water were pumped from <br /> ,on-site 55-gallon drums The purge water had been generated during previous ground water <br />' monitoring events Pumping and disposal was completed by American Valley Waste Oil, Inc of <br /> Delhi,California The purge water was disposed at Seaport Environmental located in Redwood City, <br /> California A copy of the waste disposal manifest is Included in Appendix C <br /> 3.0. FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> ' 09 November 2001 Laboratory analysis of ground water samples was used to quantify the Impact <br />' to ground water <br />' 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> Depth to ground water could not be measured in well MW-1 on 09 November 2001 due to the lack <br /> Advanced GeoEnvkronmentai,Inc <br /> I <br />