Categorical Exclusion (CX) Determinations

Pacific Northwest Site Office Categorical Exclusion (CX) Determinations

Determination Date Name of Action: Description Categorical Exclusion Number
3/31/2023 Generic Categorical Exclusion for Research Activities in Aquatic Environments B3.16
2/1/2023 Generic Categorical Exclusion For Safety And Security Component Installation And Alteration, Pacific Northwest National Laboratory, Richland, Washington B1.11; B2.2
10/11/2022 Project-Specific Categorical Exclusion For Worldwide Hydrobiogeochemical Observation Network For Dynamic Rivers (WHONDRS) ICON-MODEX Research Activities In Aquatic Environments, Pacific Northwest National Laboratory, Richland, Washington B3.16
10/19/2020 Generic CX for Small-Scale Renewable Energy Research And Development And Pilot Projects In Aquatic Environments B5.25
10/19/2020 Generic CX For Small-Scale Renewable Energy Research And Development And Pilot Projects In Terrestrial Environments B5.15
9/17/2020 Generic CX for General Agency Actions A1, A8, A9, A11, A14
6/4/2015 Generic Categorical Exclusion for Small-Scale Renewable Energy Research and Development and Pilot Projects in Aquatic Environments 5.25
7/24/2015 Generic Categorical Exclusion for Small-Scale Renewable Energy Research and Development and Pilot Projects 5.15
5/29/2020 Generic CX for Facility Safety and Environmental Improvements B2.5
5/5/2020 Generic CX for Equipment Installation, Calibration, and Qualification B1.31, B2.2, B2.4
* 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