DOE prepared this supplement analysis (SA) to evaluate the Waste Isolation Pilot Plant Disposal Phase Final Supplemental Environmental Impact Statement (DOE/EIS-0026-S2) in light of changes that could have bearing on the potential environmental impacts previously analyzed. Included with this SA is a proposed change pertaining to the excavation of two underground replacement panels for the disposal of transuranic (TRU) waste.

For more information, see Waste Isolation Pilot Plant Disposal Phase.