Tetra Tech Inc., Pasadena, California, was awarded a $17,144,955 firm-fixed-price contract for environmental quality support services. Bids were solicited via the internet with three received. Work will be performed at Tinker Air Force Base, Oklahoma, with an estimated completion date of April 30, 2029. Fiscal 2024 operation and maintenance, Air Force funds and defense working capital funds in the amount of $2,888,763 were obligated at the time of the award. U.S. Army Corps of Engineers, Fort Worth, Texas, is the contracting activity (W9126G-24-F-0286).