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UMTRA Project Water Sampling and Analysis Plan, Riverton, Wyoming (open access)

UMTRA Project Water Sampling and Analysis Plan, Riverton, Wyoming

Surface remediation was completed at the former uranium mill site in Riverton, Wyoming, in 1990. Residual radioactive materials (contaminated soil and debris) were removed and disposed of at Union Carbide Corporation`s (Umetco) nearby Gas Hills Title 2 facility. Ground water in the surficial and semiconfined aquifers (known collectively as the `uppermost aquifer`) below the former mill and tailings site has been contaminated. No contamination has been detected in the deeper, confined sandstone aquifer. The contaminant plume extends off site to the south and east. The plume is constrained by surface wetlands and small streams to the east and west of the site and by the Little Wind River to the south. Fifteen monitor wells installed in 1993 were sampled to better define the contaminant plume and to provide additional water quality data for the baseline risk assessment. Samples also were collected from domestic wells in response to a request by the Wyoming Department of Environmental Quality in January 1994. No contamination attributable to the former uranium milling operations have ever been detected in any of the domestic wells used for potable supplies.
Date: March 1994
Creator: unknown
System: The UNT Digital Library
UMTRA Project Water Sampling and Analysis Plan, Spook, Wyoming (open access)

UMTRA Project Water Sampling and Analysis Plan, Spook, Wyoming

Surface remedial action is complete at the Spook Uranium Mill Tailings Remedial Action Project site in Wyoming. Based on an evaluation of site characterization data, the US Nuclear Regulatory Commission, US Department of Energy, and state of Wyoming have concurred in the determination that a program to monitor ground water is not required because ground water in the uppermost aquifer is Class 3 (limited use) (40 CFR 192.21(g)(1993)).
Date: March 1994
Creator: unknown
System: The UNT Digital Library
Gravity and Aeromagnetic Studies of the Powder River Basin and Surrounding Areas, Southeastern Montana, Northeastern Wyoming, and Western South Dakota (open access)

Gravity and Aeromagnetic Studies of the Powder River Basin and Surrounding Areas, Southeastern Montana, Northeastern Wyoming, and Western South Dakota

From abstract: This report contains complete Bouguer anomaly, isostatic residual anomaly, and horizontal gradient anomaly gravity maps of the Powder River Basin and surrounding areas in southeastern Montana, northeastern Wyoming, and western South Dakota were compiled using gravity data from 21,528 stations. A total-intensity anomaly aeromagnetic map with 3 mile spaced east-west flight-lines is also presented. Also included is an analysis of these maps and data, focusing on gravity and aeromagnetic studies.
Date: 1994
Creator: Robbins, Stephen L.
System: The UNT Digital Library