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i17 August 2004 <br /> AGE-NC Project No 01-0827 <br />' Page 3 of 6 <br />' 2 2 1 Well Monitoring and Evacuation <br /> A Solinst water level meter was used to measure the depth to ground water in each well After water <br />' levels were gauged, a dedicated disposable bailer was used to purge well VW-2d of a minimum of <br /> three casing-water volumes (approximately 8 gallons) of ground water Temperature, pH, and <br /> conductivity were measured at regular intervals during purging using an Oakton model water <br />' analyzer Purged water from impacted wells was stored on-site in 55-gallon drums The field data <br /> sheets are included in Appendix A <br />' 2 2 2 Ground Water Sample Collection and Analysis <br />' After allowing well VW-2d to achieve a minimum 80% recovery of the pre-purge water volume, a <br /> water sample was collected using the disposable bailer The sample was transferred into three 40-m1 <br /> EPA-approved volatile organic analysis(VOA)vials The samples were stored in a chilled container <br />' and transported under chain of custody to Cal Tech Environmental Laboratories (CTEL) a <br /> Department of Health Services (DHS)-certified analytical laboratory The samples were analyzed <br /> lie for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br />' Method 8015 Modified, <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTEX), and the fuel oxygenated <br /> compounds tertiary butanol (TBA), di-isopropyl ether (DIPE), ethyl tertiary-butyl ether <br /> I (ETBE), tertiary-amyl methyl ether (TAME), methyl-tertiary-butyl ether (MTBE), <br /> 1,2-Dichloroethane (1,2-DCA), ethylene dibromide (EDB), ethanol and methanol by EPA <br /> Method 8260 <br /> 1 <br />' 3.0. FINDINGS <br /> Ground water flow directions and gradients were inferred from the field data collected on 10 May <br />' and 10 June 2004 Contaminant impacts to ground water at well VW-2d were assessed from the <br /> laboratory analysis of the ground water samples collected on 10 May, 10 June and 12 July 2004,the <br /> DO concentrations and ORP were determined from field data collected on 10 May and 10 June 2004 <br />' (Appendix A) <br />' Advanced GeoEnvironmental,Inc <br /> 1 <br />