[en] The purpose of Addendum B is to identify required changes from the Project Gnome Decontamination and Decommissioning Plan (NV-202). The changes are necessitated as a result of the near cavity fill-up of the contaminated salt and soil prior to the downhole disposition of the total volume of uncontaminated salt. An alternative disposition plan for salt burial, as noted in Addendum A, is therefore necessary. Additional long term monitoring objectives are also addressed