Single record data listings taken during aerial gamma-ray and magnetic surveys of the McCook quadrangle in Kansas and Nebraska.

The Commodity Credit Corporation of the U.S. Department of Agriculture (CCC/USDA) operated a grain storage facility in Waverly, Nebraska, from 1952 to 1974. During this time, the grain fumigant '80/20' (carbon tetrachloride/carbon disulfide) was used to preserve stored grain. In 1982, sampling by the U.S. Environmental Protection Agency (EPA) found carbon tetrachloride contamination in the town's groundwater. After an investigation of the contaminant distribution, the site was placed on the National Priority List (NPL) in 1986, and the CCC/USDA accepted responsibility for the contamination. An Interagency Compliance Agreement between the EPA and the CCC/USDA was finalized in May 1988 (EPA 1990). The EPA (Woodward-Clyde Consultants, contractor) started immediate cleanup efforts in 1987 with the installation of an air stripper, a soil vapor extraction system, a groundwater extraction well, and groundwater and soil gas monitoring wells (Woodward-Clyde 1986, 1988a,b). After the EPA issued its Record of Decision (ROD; EPA 1990), the CCC/USDA (Argonne National Laboratory, contractor) took over operation of the treatment systems. The CCC/USDA conducted a site investigation (Argonne 1991, 1992a,b), during which a carbon tetrachloride plume in groundwater was discovered northeast of the former facility. This plume was not being captured by the existing groundwater extraction system. The remediation …

Final report documenting a high-sensitivity airborne gamma radiation and magnetic field survey of the McCook National Topographic Map segment (NK 14-10 quadrangle) including a description of the program and results with the flight line profile data and statistical analysis results.

Final report of the airborne gamma ray and total magnetic field survey for the Sterling quadrangle, Colorado-Nebraska-Kansas. Sections I through IV of this report present information and results associated with this specific survey. Section V gives the data acquisition and the processing procedures.

This report provides the results of analyses of the airborne gamma radiation and total magnetic field survey flown for the Valentine quadrangle in Nebraska and South Dakota.