TETRA TECH, INC. - THE CONTRACTOR SHALL SUPPORT REQUIREMENTS FOR DEVELOPING A CONCEPTUAL SITE MODEL (CSM), A REMEDIAL INVESTIGATION (RI), A RISK ASSESSMENT (RA), AND A FEASIBILITY STUDY (FS), COLLECTIVELY REFERRED TO AS AN RI/FS, AT THE LUKACHUKAI MOUNTAINS MINING DIST

On Dec 5, 2025, Environmental Protection Agency obligated $6,096,625.3 to TETRA TECH, INC. for the contractor shall support requirements for developing a conceptual site model (csm), a remedial investigation (ri), a risk assessment (ra), and a feasibility study (fs), collectively referred to as…. The award is classified under NAICS 541620 — ENVIRONMENTAL CONSULTING SERVICES and issued as a time and materials contract. Competition extent: full and open competition. Performance is located in WINDOW ROCK, AZ. The contract is scheduled through Dec 31, 2026 — approximately 7 months remaining. This award is one of several similar procurements from Environmental Protection Agency under NAICS 541620 — related awards are listed below.