Categorical Exclusion (CX) Determinations By Date

In support of decontamination and decommissioning (D and D) at the Portsmouth Gaseous Diffusion Plant (PORTS) and the current U.S. Department of Energy (DOE) mission of preparing areas for industrial reuse at PORTS, DOE plans to deactivate, demolish, and disposition two trailer complexes: the X-151 Contractor Office Trailer Complex and the X-152 Site Operations Management Complex.
Sustain Energy LLC filed an application with the Department of Energy’s (DOE) Hydrocarbons and Geothermal Energy Office (HGEO) on May 12, 2026. Sustain requests authorization to conduct "small-scale natural gas exports" under DOE's regulations at 10 CFR 590.208(a).
This Fourth Amended Determination follows the approval of additional funding, extended period of performance, a new project team member, and additional project milestones to support the project team's small-scale research and development activities to further advance a chip-level direct two-phase impingement jet cooling solution to enhance overall thermal performance while reducing pumping power under the Cooling Operations Optimized for Leaps in Energy, Reliability, and Carbon Hyperefficiency for Information Processing Systems Program (COOLERCHIPS) Program.
The U.S. Department of Energy (DOE) is proposing to provide funding to the Little Rock School District to perform energy efficiency upgrades at 15 schools within their district. This funding opportunity is part of a DOE prize competition known as FY24 Renew America's Schools - Prize to Cooperative Agreement.
This Third Amended Determination follows the approval of additional funding, extended period of performance, change of project location, and new project milestones to support the project team's small-scale research and development activities to enable microbial production of methanol from methane feedstock, in progress under the Optimized Flexible Fuels using Grid-free Reactors with Intermittent Delivery (OFF GRID, formerly GREENWELLS) Program.
The Cooling Operations Optimized for Leaps in Energy, Reliability, and Carbon Hyperefficiency for Information Processing Systems 1.5 (COOLERCHIPS 1.5) Program consists of projects selected from the first phase of the COOLERCHIPS program for additional funding, extended period of performance, and new project milestones to continue development of water-free, advanced cooling systems for high-power data centers demanded by artificial intelligence (AI).