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' 05 February 2002 <br /> . AGE-NC Project No 98-0432 <br /> Page 2 of 4 <br /> ' logs are included In Appendix A Purge water generated from the site monitoring wells was <br /> contained on-site In appropriately labeled 55-gallon drums Water was later disposed at Seaport <br /> Environmental under manifest 302-191 (Appendix A) <br /> 1 ' <br /> 22 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Ground water samples were collected from the monitoring wells using disposable polyethylene <br /> bailers These bailers are disposed of after one use and require no decontaminating,minimizing cross <br /> contamination due to sampling devices Each water sample was transferred into three 40-m1 <br /> EPA-approved VOA vials containing 0 5 ml 18%HCI as a sample preservative and Into one 1-liter <br /> amber bottle without preservative After collection,the samples were labeled and placed in a chilled <br /> ' container for transportation under chain-of-custody to McCampbell Analytical Laboratory(MAI) <br /> In Pacheco,California,a State of California Department of Health Services(DHS)Laboratory Each <br /> sample was analyzed for <br /> ' Benzene toluene eth lbenzene and total xylenes TEX In accordance with EPA Method <br /> > Y Y � ) <br /> 8024, <br /> Total petroleum hydrocarbons quantified as diesel(TPH-d)In accordance with EPA Method <br /> 8015 Modified, <br /> ' Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified, <br /> Fuel additive compounds Including di-isopropyl ether (DIPE), ethyl-tertiary-butyl ether <br /> (ETBE), methyl-tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), and <br /> tertiary-butanol (TBA), 1,2-dlchloroethane (1,2-DCA), ethyl dlbromlde (EDB) and <br /> ' 1,2-dlbromoethane In accordance with EPA Method 8260 Modified <br /> ' 3.0. FINDINGS <br /> ' Ground water elevation, flow direction and gradient were determined from field data collected on <br /> October 2001, the contaminant Impact to ground water was quantified by the ground water sample <br /> laboratory analytical data <br /> 3 1 GROUND WATER ELEVATION, FLOW DIRECTION AND GRADIENT <br /> The depth to ground water measured In the water-table wells ran p � ed from 18 11 to 19 71 feet below g <br /> ' Advanced GeoEnvironmental,Inc <br /> 1 <br />