Categorical Exclusion (CX) Determinations

Brookhaven Site Office Categorical Exclusion (CX) Determinations

Determination Date Name of Action: Description Categorical Exclusion Number
11/12/2025 CX Determination - Demolition of Building 902 Mechanical Room L-23 B1.23
11/5/2025 NEPA Categorical Exclusion: CX Determination Brookhaven National Laboratory Entrance Portal B1.15, B1.16, B1.23, B1.27
7/11/2025 CX Determination for Demolition of ST0690 B1.23
4/30/2025 CX Determination for Demolition of Building 526 B1.16, B1.17, B1.23, B1.34
4/3/2024 CX Determination for Demolition of Bldgs 321 412 & 728M B1.16, B1.17, B1.23, B1.34
1/4/2024 CX Determination for Building 370 Demolition B1.16, B1.17, B1.23, B1.34
10/5/2023 CX Determination for Forest Management - Rev 1
10/12/2023 CX Determination for Generic SPP and CRADA - Rev 1
10/17/2023 CX Determination for Small-Scale Research
3/16/2023 complete physical demolition of Building 388 - The Danish House B1.16, B1.17, B1.23, B1.34
* 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