Fermi Site Office CX Determinations

Determination Date Name of Action: Description Categorical Exclusion Number
3/27/2026 Transportation of LLW - Tritiated Water Disposal B1.28, B1.30
3/19/2026 Adoption of Generic CX B5.2 Modifications to pumps and piping B5.2
3/19/2026 Adoption of Generic CX B2.5 Facility safety and environmental improvements B2.5
2/12/2026 NEPA Categorical Exclusion: FSO CX Determination Building Equipment and Instrumentation B2.2
2/12/2026 NEPA Categorical Exclusion: FSO CX Determination Installation or Relocation of Machinery and Equipment B1.31
12/9/2025 CX Determination for Installation of Turnkey Cooling Water Tower Treatment System (also known as Mixed Oxidant System - MIOX) at Central Utility Building B1.3, B1.31
11/13/2025 CX Determination Infrastructure Modifications for MAGIS-100 B2.2, B3.6
11/13/2025 CX Determination FUSRAP Phase II Project at IARC B3.6, B3.10
11/12/2025 CX Determination Generic CX B1.3 Routine Maintenance B1.3
11/12/2025 CX Determination Generic CX B3.6 Small-Scale Research B3.6
* Implicit in CX determinations are the following:
  1. There are no extraordinary circumstances related to the proposed action that may affect the significance of the environmental effects of the proposed action.
  2. The proposed action is not “connected” to other actions with potentially significant impacts.
  3. The proposed action is not related to other proposed actions with cumulatively significant impacts.
  4. The proposed action is not precluded by 40 CFR 1506.1 or 10 CFR 1021.211.
  5. For CX determinations made prior to November 14, 2011, CX number definitions can be found at: http://energy.gov/sites/prod/files/nepapub/nepa_documents/RedDont/CXR-10CFRPart1021-Changes.pdf