Categorical Exclusion (CX) Determinations

SLAC Site Office Categorical Exclusion (CX) Determinations

CX Determinations prior to October 2009 should be requested from David Osugi.

Determination Date Name of Action: Description Categorical Exclusion Number
3/22/2024 Off-Site Transportation of Low-Level Waste (LLW) from SLAC (SS-SC-24-01) B1.28, B1.30
2/15/2024 Critical Utilities Infrastructure Revitalization (CUIR) (SS-SC-21-02) B1.3, B1.7, B1.15, B2.2, B4.10, B4.11
11/30/2023 SLAC Main Gate - Site Security and Access Improvement (SS-SC-23-01) B1.13 B1.15 B1.23
5/24/2021 Critical Utilities Infrastructure Revitalization Project B1.15
9/9/2020 Demolition and disposal of Building 765 SS-SC-20-02 B1.23
8/10/2016 SLAC Trailer Removal Program SS-SC-16-02 B 1.23
2/3/2016 Demolition & Disposal ofTrailers 235, 266, 267, 299 SS-SC-16-01 B 1.23
7/22/2015 NEPA Categorical Exclusion: 07 22 15 B1.23
7/15/2015 NEPA Categorical Exclusion: 07 15 15 B3.10
4/7/2015 NEPA Categorical Exclusion: 04 07 15 B1.15; B3.6
* 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