T Plant 277-T Building Closure Unit Group 27 (CUG-27)

[TSD ID#: TS-2-7] Located in Hanford's 200 West Area, T Plant was the first large-scale plutonium separation facility. It performed separations from 1945 to 1956. The 221-T Canyon Building is now being used for storage, waste treatment and repackaging activities. Located on the northwest side of the 221-T Canyon Building, the 277-T Building was used to store a very large waste box. The unit was not authorized for permitted storage and is closing. The waste box has been removed, but the building itself must be clean closed. The concrete slab will be decontaminated and focused soil samples will be taken underneath the concrete slab and building sump.

Enforceable Permit:

Issued in accordance with the applicable provisions of the Hazardous Waste Management Act, Chapter 70A.300 Revised Code of Washington (RCW), and the regulations promulgated there under in Chapter 173‑303 Washington Administrative Code (WAC).

Permit Number: WA7890008967