Categorical Exclusion (CX) Determinations

Pacific Northwest Site Office Categorical Exclusion (CX) Determinations

Determination Date Name of Action: Description Categorical Exclusion Number
4/9/2024 Generic Categorical Exclusion for Research Activities in Aquatic Environments B3.16
4/9/2024 Generic Categorical Exclusion for Small-Scale Renewable Energy Research and Development and Pilot Projects in Aquatic Environments B5.25
4/9/2024 Generic Categorical Exclusion for Site Characterization and Terrestrial Research B3.1, B3.8
2/28/2024 Project Specific Categorical Exclusion for a Ground Source Heat Pump at PNNL B5.19
2/21/2024 Categorical Exclusion For Small-Scale Research and Development, Laboratory Operations, and Pilot Projects B3.6
12/19/2023 Project Specific Categorical Exclusion for the 300 Area Potable Water Supply Line B5.4
9/29/2023 Project Specific Categorical Exclusion for the Wind Forecast Improvement Project (WFIP3) B3.1, B4.12, B5.15, B5.25
9/20/2023 Description: Project Specific Categorical Exclusion for the construction of a training facility in Volusia, FL B1.15, B1.24
4/3/2023 Generic Categorical Exclusion for Minor Road and Utility Operations B1.3, B1.7, B1.13, B1.32, B4.7,
3/31/2023 Generic Categorical Exclusion for Siting, Constructing, Modifying, and Operating Small-Scale Structures B1.15
* 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