Laserfiche WebLink
1 <br /> ' 20 September 2002 <br /> • AGE-NC Project No 98-0432 <br /> ' Page 2 of 4 <br /> ' Temperature, pH and conductivity of the purged water were measured at regular purge-volume <br /> Intervals with an Oakton water analyzer Monitoring well field logs are included in Appendix A <br /> Purge water generated from the site monitoring wells was contained on-site In appropriately labeled <br /> 55-gallon drums <br /> ' 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Ground water samples were collected from the monitoring wells using disposable polyethylene <br /> ' bailers, these bailers were disposed of after one use and require no decontaminating, thereby <br /> minimizing cross contamination due to sampling devices Each water sample was transferred Into <br /> three 40-m1 EPA-approved VOA vials containing 0 5 ml 18%HCl as a sample preservative and Into <br /> ' one 1-liter amber bottle without preservative After collection,the samples were labeled and placed <br /> in a chilled container for transportation under chain-of-custody to McCampbell Analytical <br /> Laboratory (MAI), a California Department of Health Services-certified Laboratory in Pacheco, <br /> ' California Each sample was analyzed for <br /> ' . • Total petroleum hydrocarbons quantified as gasoline (TPH-g) In accordance with EPA <br /> Method 8015 Modified, <br /> • Total petroleum hydrocarbons quantified as diesel and motor oil(TPH-d/mo)in accordance <br /> ' with EPA Method 8015 Modified, <br /> • Benzene,toluene, ethylbenzene and total xylenes (BTEX)in accordance with EPA Method <br /> ' 8260B, and <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-dichloroethane (1,2-DCA), ethyl dibromide (EDB) and <br /> 1,2-dibromoethane, in accordance with EPA Method 8260B <br /> 1 <br /> 30 FINDINGS <br /> ' Ground water elevation, flow direction and gradient were determined from field data collected in <br /> July 2002, the contaminant Impact to ground water was quantified by the ground water sample <br />-' laboratory analytical data - <br /> ' Advanced GeoEnv ronmental,Inc <br />