Laserfiche WebLink
I <br /> 10 December 2001 <br /> AGE-NC Project No 95-0141 <br /> Page 2 of 5 <br /> After depth to ground water measurements, a minimum of 3 casing-water volumes of water was <br /> purged from each well to be sampled using a PVC submersible two-stage pump or a new, clean, <br /> disposable plastic bailer Approximately five to twenty-two gallons of water were removed from <br /> wells MW-1 through MW-8 Temperature, pH and conductivity of purged ground water were <br /> measured at 1- to 4-gallon intervals using an Oakton water analyzer The field data and field sheets <br /> are included in Appendix B Purged water was temporarily stored on-site in 55-gallon DOT- <br /> approved H-17 storage drums pending proper disposal Following purging,the depth to ground water <br /> was measured to ensure that a mmimum of 80% well-volume recharge had been achieved prior to <br /> sampling <br /> I <br /> 2 2 GROUND WATER SAMPLE COLLECTION <br /> A water sample was collected from each well using a new, clean, disposable plastic bailer <br /> Immediately upon retrieval, the samples were transferred into three 40-m1 EPA-approved VOA vials <br /> containing 0 5 H 18% hydrochloric acid as a sample preservative The samples were logged on a <br /> chain-of-custody form, stored in a chilled container and transported under cham-of-custody to <br /> . McCampbell Analytical Inc (MAT), a California Department of Health Services (DHS)-certified <br /> laboratory The ground water samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified, <br /> e Benzene, toluene, ethylbenzene and total xylenes (BTEX) in accordance with EPA Method <br /> 8020, and <br /> • Oxygenated compounds - di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br /> methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol <br /> (TBA), methanol, ethanol, ethyldibronude (EDB) and 1,2-dichloroethane (1,2-DCA) in <br /> accordance with EPA Method 8260 Modified, respectively <br /> I <br /> 3.0. FINDINGS <br /> IGround water elevations and flow directions were inferred from field data Hydrocarbon-impact to <br /> ground water was characterized from laboratory analytical data <br /> I <br /> I <br /> i <br /> I <br /> Advanced GeoEuvironniental,Inc <br /> I <br />