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. 08 July 2004 <br /> AGE-NC Project No 95-0184 <br />' Page 2 of 5 <br />' 22 COLLECTION OF GROUND WATER SAMPLES <br /> Water samples were collected from MW-1 through MW-4, MW-7, VW-3 and VW-4 with a hose <br />' bailer while dedicated disposable plastic bailers were used to sample the remaining wells after <br /> allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each water <br /> sample was transferred into laboratory-supplied 40-m1 volatile organic analysis (VOA) vials <br /> containing 0 5 ml 18%hydrochloric acid as a sample preservative,the sample from MW-4 was also <br /> transferred into a 1-liter amber bottle without preservative After collection, the samples were <br /> properly labeled, placed in a chilled container and transported under chain-of-custody to Cal Tech <br />' Environmental Laboratories (CTEL), a California Department of Health Services (DHS)-certified <br /> analytical laboratory for analysis The samples were analyzed for <br />' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015M and <br />' • Volatile organic compounds (VOCs), including benzene, toluene, ethylbenzene and total <br /> xylenes (BTEX) with fuel oxygenates, including di-isopropyl ether (DIPE), ethyl tertiary- <br /> butyl ether(ETBE),methyl tert butyl ether(MTBE),tertiary-amyl methyl ether(TAME)and <br /> tertiary butyl alcohol (TBA) in accordance with EPA method 8260E Full Scan <br />' In addition, ground water sample MW-4 was analyzed for diesel (TPH-d) in accordance with EPA <br /> Method 8015M <br /> r <br />' 2 3' PURGE WATER DISPOSAL <br />' On 13 January 2004 American Valley Waste Oil, Inc of Delhi, CA collected approximately 330 <br /> gallons of purge water from the site The purge water was transported under non-hazardous waste0,3� <br /> manifests to Seaport Environmental of Redwood City, CA an EPA-approved disposal facility A A � <br /> copy of the non-hazardous waste manifest can be found in Appendix C <br /> r <br />' 3.0. FINDINGS <br /> Ground water elevation and flow direction were inferred from field data Hydrocarbon-impact to <br />' ground water was quantified by laboratory analysis of the ground water samples <br />' Advanced GeoEnvlronmental,Inc <br /> I <br />