In 2021, Roux Engineering completed a comprehensive Feasibility Study that analyzed different cleanup options for the CFAC Superfund site. This technical report evaluated contamination levels, assessed risks to people and wildlife, and compared various remedial approaches—from full removal to on-site containment. The EPA relied heavily on this study when developing its proposed cleanup plan in 2023 and issuing the final Record of Decision in 2025. Reading this document helps explain how the EPA arrived at its controversial decision to leave toxic waste on-site rather than remove it.