Categorical Exclusion (CX) Determinations

Argonne Site Office Categorical Exclusion (CX) Determinations

Determination Date Name of Action: Description Categorical Exclusion Number
8/26/2010 ASO-CX-269 Generic Categorical Exclusion: Routine Grounds and Maintenance Activities B1.3; B1.11; B1.15
2/11/2010 ASO-CX-264 Application of Wastewater Treatment Filter Bed Sand B6.8
4/6/2010 ASO-CX-261 Installation of a 138kV Substation at Building 202 and Modification of Substation 549A B4.11
4/6/2010 ASO-CX-265 Indoor Bench-Scale Research Projects and Conventional Laboratory Operations B3.6
4/6/2010 ASO-CX-266 Building 212 Electron Microscopy Improvements B2.1
12/16/2009 ASO-CX-260 Investigation of Photoactive Devices and Catalysts (CSE062) B3.6
12/16/2009 ASO-CX-259 Operation of the 20 MeV Electron Linac Accelerator, including upgrade to 50 MeV (CSE060) B3.10
2/9/2010 ASO-CX-262 Generic Categorical Exclusion: Miscellaneous Installations and Maintenance Activities B1.3-B1.5; B1.9; B1.11; B1.15-B1.17; B1.22; B1.27; B1.31; B2.1-B2.3; B2.5
1/25/2010 ASO-CX-263 200 Area Chilled Water Plant B1.15
12/16/2009 ASO-CX-258 Operation of 3 MeV electron Van de Graaff Accelerator (CSE059) B3.10
* 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