We're holding a 45-day public comment period which will address proposed modifications to the Hanford Dangerous Waste Permit for the treatment, storage, and disposal of dangerous waste at the Waste Treatment and Immobilization Plant (WTP), located in Part III, Operating Unit Group 10 (Permit).
The permittees are U.S. Department of Energy Office of River Protection and Bechtel National, Inc. WTP is located on the Hanford Site in Southeastern Washington.
Review and comment
The modification proposal and supporting documents are on our Hanford public comment periods page.
The proposed changes incorporate the draft preliminary risk assessment and the risk assessment work plan for the Direct-Feed Low-Activity Waste (DFLAW) configuration.
The risk assessment work plan supplements two through five would also be updated for incorporation into the permit.
This permit modification will update and add new documents to the WTP portion of the permit to support the risk assessment for the DFLAW configuration. Updates to the documents in Appendix 6.2 of the WTP portion of the permit are necessary to ensure the DFLAW configuration has been adequately analyzed and reviewed through the risk assessment work plan.
This permit modification also provides the draft pre-demonstration test risk assessment for WTP for Ecology review, as required by Permit Condition III.10.C.11.b and Interim Compliance Schedule EMF-9 of the WTP portion of the permit.
The draft risk assessment work plan for DFLAW and the pre-demonstration test risk Assessment for WTP use the best available information, approved models, U.S. Environmental Protection Agency combustion risk assessment guidance, and conservative exposure scenarios and assumptions.