Halff Associates Inc., Richardson, Texas, was awarded a $10,432,269 firm-fixed-price contract to conduct Phase I Remedial Investigation at Tinker Air Force Base and Altus Air Force Base for the Air Force Civil Engineer Center. Bids were solicited via the internet with one received. Work will be performed in Oklahoma City, Oklahoma and Altus, Oklahoma, with an estimated completion date of Sept. 11, 2025. Fiscal 2022 environmental restoration, defense funds in the amount of $10,432,269 were obligated at the time of the award. U.S. Army Corps of Engineers, Tulsa, Oklahoma, is the contracting activity (W912BV-22-F-0111).