Waste Encapsulation and Storage Facility, Hot Cells A through F Closure Unit Group 6 (CUG-6)

[TSD ID#: S-2-10] Located in Hanford's 200 East Area, adjoining B Plant, WESF began operating in 1974.  This facility stores 1,936 capsules of cesium-137 and strontium-90 underwater.  The waste inside the capsules came from Hanford's underground storage tanks in a campaign in the 1970s to remove the extremely radioactive materials.

Enforceable Permit:

Issued in accordance with the applicable provisions of the Hazardous Waste Management Act, Chapter 70.105 Revised Code of Washington (RCW), and the regulations promulgated there under in Chapter 173-303 Washington Administrative Code (WAC). 

Permit Number: WA7890008967