Site characterization summary report for the Old Hydrofracture Facility, Waste Area Grouping 5, at Oak Ridge National Laboratory, Oak Ridge, Tennessee

The Old Hydrofracture (OHF) Facility was an experimental waste disposal test site located at the Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee. ORNL is a research facility owned by the U.S. Department of Energy (DOE) and managed by Lockheed Martin Energy Research Corp. Legacy environmental restoration sites, such as the OHF Facility, are managed for DOE by Lockheed Martin Energy Systems, Inc. This report summarizes the known conditions at the OHF Facility located in the southwest comer of Waste Area Grouping (WAG) 5 at ORNL. The facility covers about I acre within the approximate ORNL grid coordinates N17100-N17300 and E28500-E28700. The facility was used for the injection of liquid intermediate-level wastes (ILW) into a shale formation well below ground surface as a means of permanent disposal. Wastes remaining at the site after the last series of injections in 1980 can be found in buildings, waste pits, the retention pond, tanks, and piping. Based on a recent assessment of risk posed by these wastes, the contents of the tanks will be removed. Characterization data collected to date are provided in this report to facilitate waste removal activities