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 Small Scale Research and Development B3.6
3/31/2023 Generic Categorical Exclusion for Site Characterization B3.1
3/31/2023 Generic Categorical Exclusion for Routine Maintenance B1.3, B1.4, B1.8, B1.16, B1.17
3/31/2023 Generic Categorical Exclusion for Property Transfers B1.24
3/31/2023 Generic Categorical Exclusion for Outdoor Tests on Materials and Components B3.11
3/31/2023 Generic Categorical Exclusion for Small-Scale Research and Development Projects using Nanoscale Materials B3.15
3/31/2023 Generic Categorical Exclusion for Microbiological and Biomedical Research B3.12
3/31/2023 Generic Categorical Exclusion for the Protection of Cultural Resources or Fish and Wildlife Habitat B1.20
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
* 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