EPA published the residual risk and technology review (RTR) of the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Plywood and Composite Wood Products (PCWP), (40 CFR part 63, subpart DDDD) in the Federal Register on August 13, 2020 (85 FR 49434). PCWP facilities include lumber, plywood, particleboard, medium density fiberboard, hardboard, (structural) fiberboard, oriented strand board (OSB) and engineered wood products manufacturing processes. In a decision issued April 21, 2020, the D.C. Circuit held that EPA has an obligation to address unregulated emissions from a source category when the Agency conducts the 8-year technology review under the Clean Air Act (CAA) 112(d)(6). These amendments will define the MACT (maximum achievable control technology) standards for unregulated HAP emissions within the PCWP source category according to the provisions in the CAA. The amendments were proposed on May 18, 2023 (88 FR 31856). The EPA plans to issue a supplemental notice of proposed rulemaking to prior to finalizing the amendments. The EPA is under a court-ordered deadline for signature of the final rule by June 30, 2026.