Publication Date: Research Org.: Oak Ridge National Lab. A total of 450 test holes were analyzed resulting in the delineation of six plumes.Īuthors: Smuin, D. Groundwater screening was subsequently performed at 19 other sites. The most effective technique for identification of petroleum hydrocarbon-contaminant plumes was groundwater test hole screening. Well placement was re-evaluated, and well sites were relocated based on the screening information. Five areas of floating petroleum hydrocarbon product were identified along with the overall dissolved contaminant plume boundaries. On-site head-space analyses for volatile organic compounds (VOCS) were performed using a portable gas chromatograph (GC). Groundwater samples were collected from the open drill hole with a bailer. Groundwater screening consisted of auger drilling down to the shallow alluvial aquifer. Therefore groundwater test hole screening was performed. These screening methods identified I areas of contamination however, results were inconclusive. Initial screening at the first study site included two soil-gas surveys and electromagnetic geophysical studies. The three techniques include soil-gas surveys, electromagnetic geophysical surveys, and groundwater test hole screening. The methods and results for each technique are presented.
Three types of field screening techniques used in the characterization of potentially contaminated sites at Naval Air Station Fallon, Nevada, are compared.
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