As part of these site investigations, ANL needs the services of environmental geophysicists to provide expert advice on the use of geophysical techniques to describe and delineate subsurface geologic and hydrogeologic conditions. Further, ANL wants to display contaminant plumes at these sites in three-dimensions using software designed for 3D visualization. The former USDA CCC site is located on the north edge of the town. Carbon tetrachloride is found in the soil and water samples from wells and test borings in the vicinity of the site and in Ceresco. Concentrations of carbon tetrachloride above MCL have been detected in former public water supply wells.
Indications are that the plume is moving south and westward along the eastern edge of the village.
To aid in the understanding of the subsurface geology and determine the contaminant flow pathways, a high-resolution shear wave seismic reflection survey was proposed. Milford, Nebraska is located approximately 20 miles west of Lincoln, Nebraska. The former USDA CCC site is located 2 miles south of town. Carbon tetrachloride is found in water samples from wells and test borings in the vicinity of the site and the plume is moving eastward toward the Big Blue River. High-resolution shear wave seismic reflection surveys and were used to aid in the understanding of the subsurface geology and determine contaminant flow pathways.