By the end of 2015, all Depleted Uranium, corrosive mixed wastes, mixed waste organics, mixed waste metals, Sonedyne wastes, equipment oils and pit sludges previously stored on site during the NTCRA were all shipped off-site for disposal with EnergySolutions.
Stage 1 of the building demolition began this fall as part of the Phase 3 Construction Submittal and is now complete, including demolition of Butler buildings B1, B2, and B3, Tank House, pump house 2, acetone shed, hydrogen peroxide shed, gas cylinder shed, and exterior compaction dumpster. The remaining slabs are being placed under temporary cover for the winter. For more demolition photos, see NTCRA Progress.
EPA provided a news release 1OCT2015 announcing the completed Record of Decision (ROD) for the Nuclear Metals Site, Inc. The ROD generally includes the following components:
• Excavation and off-site disposal of approximately 82,500 cubic yards of contaminated materials.
• In-Situ stabilization of depleted uranium contaminated soils in the Holding Basin using apatite injection.
• Extraction and ex-situ treatment of groundwater for volatile organic compounds (VOCs) and 1,4-dioxane.
• In-situ treatment of depleted uranium and natural uranium in groundwater.
• Long-term monitoring to monitor the effectiveness of in- and ex-situ treatment.
• Institutional Controls to prevent disturbance of the Holding Basin area, prevent the use of Site groundwater, and address potential vapor intrusion risks.
USEPA (EPA) approved the Groundwater Investigation Work Plan on 27AUG15 for further delineation of the contaminant 1,4-dioxane. The investigation will include installation of additional monitoring wells, comprehensive groundwater quality monitoring to define the extent of the 1,4-dioxane plume and water level monitoring. EPA is considering accelerating this portion of the proposed remedy and performing it as a Non-Time-Critical Removal Action (NTCRA) rather than as part of the overall remedy. Crews mobilized to the site and began well installation today, 1SEP15.
The site completed the second shipping campaign of 2015 on 31JUL with a total of 40 intermodal containers shipped containing 731,930 pounds (366 tons) of waste for disposal.
The latest shipping campaign for off-site waste disposal began 20JUL 2105. As of noon 27JUL15, 21 intermodal containers with 450,380 pounds (3,317 tons) were shipped off site.
Dismantling and removal of the rooftop systems prior to building demolition is nearly complete. Units that cannot be dismantled safely will be demolished during the Phase III Building Demolition. For additional photos, see NTCRA Progress.
Sixty-four (64) intermodal containers with waste totaling 1,384,970 lbs or 692.5 tons were shipped off-site during the May/June 2015 Shipping Campaign that ended yesterday, 2 JUN 2015. Another shipping campaign is projected to occur later this year before building demolition begins.
In preparation for building demolition, the rooftop systems are being dismantled and removed as shown here on the northwest side of Building D. The mechanical exhaust unit has been sprayed with lock down agent on the exterior and interior of the unit and the intake and exhaust have been sealed. The unit has also been wrapped in plastic wrap in preparation of its removal.
Last updated on May 4, 2015