US Ecology Washington Inc., Richland, Washington, is awarded a $15,829,013 modification to previously awarded firm-fixed-price, indefinite-delivery/indefinite-quantity contract (N4523A23D4000) due to a rate change issued by the Washington Utilities and Transportation Commission at the beginning of January 2024. The price of the contract is being modified. This contract is for Class A, B, and C low-level radioactive waste disposal services for waste under the cognizance of Puget Sound Naval Shipyard and Intermediate Maintenance Facility and the Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility. Work will be performed in Richland, Washington, and is expected to be completed by August 2028. Appropriation account operation and maintenance, Navy funds will be made available at the task order level and funding obligated via task order awards as contracting actions occur. Puget Sound Naval Shipyard and Intermediate Maintenance Facility and Northwest Regional Maintenance Center, Bremerton, Washington, is the contracting activity.