- Bechtel National, Inc. (BNI) - Design, construction, and commissioning of the Hanford Tank Waste Treatment and Immobilization Plant
- Advanced Technologies and Laboratories (ATL) - 222-S Laboratories
- Wastren Advantage, Inc. (WAI) - 222-S Laboratories (Transitional phase from September 22, 2015 - November 21, 2015 with full performance on November 22, 2015)
- Washington River Protection Solutions LLC (WRPS) - Tank Operations Contract
Disclaimer: All contract documents on this website are electronic copies, not originals. Accordingly, none of the contract documents on this website are official contract documents, and should be regarded only as reference materials. The signed original version of the contract, and all modifications thereto, are located in the Office of River Protection, Acquisition Management Division.