December 19, 2023
CX-029637: Upgrade and installation of a water supply line in the 300 area of the Hanford Site, Pacific Northwest National Laboratory, Richland, WA
Pacific Northwest National Laboratory (PNNL) proposes to install new water supply lines to upgrade the existing drinking water system and service t…
December 12, 2023
CX-029695: HMIS Annual Categorical Exclusion
Hanford Mission Integration Solutions (HMIS) and their subcontractors perform repair, replacement, upgrading, rebuilding, or minor relocation of pi…
August 18, 2023
CX-028704: Extraction Line Burial at the Rifle, Colorado, Disposal Site
LM is proposing to bury the disposal cell leachate discharge pipelines at the Rifle, Colorado, Disposal Site located in Garfield County, to prevent…
June 26, 2023
CX-028373: Administrative Actions, Routine Operations, and Maintenance Activities at the Tuba City, Arizona, Disposal Site
LM is proposing to conduct administrative actions, routine operations, and maintenance activities at the Tuba City, Arizona, Disposal Site.…
December 13, 2022
CX-027329: HMIS Annual Categorical Exclusion (CX) B5.4, Repair or Replacement of Pipelines for CY 2023
Hanford Mission Integration Solutions (HMIS) and their subcontractors perform repair, replacement, upgrading, rebuilding, or minor relocation of pi…
April 20, 2022
CX-270661: Knolls Laboratory Steam and Condensate Upgrade Project
The purpose of the Knolls Laboratory Steam and Condensate Upgrade Project (Project) is to replace significant portions of the existing steam and condensate distribution system that are beyond their useful service life, vulnerable to service disruptions an
March 22, 2022
CX-025761: Y12-NEPA-004-R and D, Rev 0, Analytical Laboratory and Research and Development (R and D) Activities Conducted by the Analytical Chemistry and Y-12 Development Organization, CY 2022 to CY 2024.
National Nuclear Security Administration’s proposed action is to perform the necessary and routine analytical laboratory operation, research and de…
March 22, 2022
CX-025758: Y12-NEPA-001-RM, Rev 0, Routine Maintenance Actions performed at the Y-12 National Security Complex (Y-12), CY 2022 to CY 2024.
National Nuclear Security Administration’s (NNSA) proposed action is to perform the necessary and routine administrative actions, training exercise…
November 9, 2021
CX-024908: Linear Assets Modernization Project (LB-CX-22-02)
The US Department of Energy (DOE) proposes to perform assessment, modernization, and upgrade of the existing sitewide utility systems at the Lawren…
November 1, 2021
CX-025026: Emergency Pipeline and Piping Repair
Make emergency repairs on the Strategic Petroleum Reserve (SPR) system site piping, offsite pipelines, or other designated systems.