Categorical Exclusion (CX) Determinations

Ames Site Office Categorical Exclusion (CX) Determinations

Determination Date Name of Action: Description Categorical Exclusion Number
9/3/2024 Generic CX: Operation and Maintenance of the Ames National Laboratory (Replaces Generic CX dated 2/2/2023) B1.3, B1.4, B1.5, B1.6, B1.7, B1.8, B1.11, B1.13, B1.15, B1.16, B1.17, B1.21, B1.22, B1.23, B1.27, B1.28, B1.31, B1.32, B2.1, B2.3, B2.5, B5.1
1/2/2023 Generic CX: Operation and Maintenance of the Ames National Laboratory B1.3, B1.4, B1.5, B1.6, B1.7, B1.8, B1.11, B1.13, B1.15, B1.16, B1.17, B1.21, B1.22, B1.23, B1.27, B1.28, B1.31, B1.32, B2.1, B2.3, B2.5, B5.1
7/25/2018 NEPA Categorical Exclusion: 07 25 18 2 B3.6
7/25/2018 NEPA Categorical Exclusion: 07 25 18 Various
7/10/2013 NEPA Categorical Exclusion: Sensitive Instrument Facility B3.6
6/3/2013 NEPA Categorical Exclusion: 06 03 13 1 B.18; B.19; B.20; B.22; B.24; B.26; B.28; B.30; B.31; B.34
6/3/2013 NEPA Categorical Exclusion: 06 03 13 2 B.20; B.22; B.24; B.25; B.28; B.30; B.31; B.32; B.34;
* 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