Hanford Borehole Geophysical Logging
The U.S. Department of Energy (DOE) conducts borehole geophysical logging at the Hanford Site to detect and quantify naturally occurring and man-made gamma-emitting radionuclides in the vicinity of liquid waste disposal sites, solid waste burial grounds and at Tank Farms. Prior to October 1, 2006, this work was managed by the DOE Grand Junction Office (GJO) through a contract with S.M. Stoller Corporation (Stoller). Starting at the beginning of the 2007 fiscal year (FY-07), DOE Richland Operations Office (RL), through the central plateau contractor, Fluor Hanford, Inc., (FH) and DOE Office of River Protection (ORP), through the tank farm contractor, CH2M Hill Hanford Group (CHG) are managing the geophysical logging work. For FY-07, FH and CHG are contracting with Stoller to continue providing geophysical logging services.
This web site contains the work conducted by Stoller under the GJO contract including plans, logs and reports. New logs will be added to this site as they become available.
Hanford 200 Areas Vadose Zone
Characterization
DOE Richland Operations Office (DOE-RL) performs characterization of the vadose zone in the vicinity of liquid waste disposal sites and solid waste burial grounds in the 200 Areas at the Hanford Site near Richland, WA.
Hanford Tank Farms Vadose Zone Monitoring
The DOE Office of River Protection (DOE-ORP) conducts monitoring for potential contaminant migration resulting from tank leaks and/or other contamination events related to tank farms operations at the Hanford Site near Richland, WA.
Single- and double-shell, steel-lined concrete tanks were constructed at Hanford for underground storage of this liquid waste that resulted from the processing of plutonium. The term "tank farm" refers to the areas on the Hanford Site where groups of these subsurface tanks are located. Sixty-seven single-shell tanks have been identified as leaking and have released an estimated 1 million gallons of high-level mixed waste into the vadose (unsaturated) zone sediments surrounding the tanks. DOE collected a baseline log of each of 760 existing dry wells, or boreholes, located around the single-shell tanks using two truck-mounted passive spectral gamma-ray logging systems.
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