This is a justification for a bridge contract extension under other than full and open competition for the U.S. Environmental Protection Agency’s Region 3 Superfund Technical Assessment and Response Team (START) VI contract. The proposed source is Tetra Tech Inc., the incumbent contractor. The contract supports emergency response, technical training, site assessment, Brownfields assessment, and remedial investigation/feasibility study services. No specific timelines, budget amounts, or performance location are detailed in the provided text. The full justification is contained in an attached document.