In response to Congressional direction in the National Defense Authorization Act for Fiscal Year 2020, Public Law No: 116-92, on 18 December 2020, the Environmental Protection Agency (EPA) issued “Interim Guidance on the Destruction and Disposal of Perfluoroalkyl and Polyfluoroalkyl Substances and Materials Containing Perfluoroalkyl and Polyfluoroalkyl Substances” (Interim Guidance) as part of its continuing efforts to regulate the large body of perfluoroalkyl and polyfluoroalkyl substances, collectively referred to as “PFAS.”