The EPA is proposing amendments to the new source performance standards (NSPS) and emission guidelines (EG) for large municipal waste combustion (MWC) units. These proposed amendments reflect the results from a reevaluation of the maximum achievable control technology (MACT) floor levels, a 5-year review, and the removal of startup, shutdown and malfunction exclusions and exceptions. These proposed amendments also streamline regulatory language, revise recordkeeping and electronic notification and reporting requirements, re-establish new and existing source applicability dates, clarify requirements for certain air curtain incinerators, close a 2007 proposed reconsideration action, correct certain typographical errors, make certain technical corrections, and clarify certain provisions in the NSPS and EG. These proposed amendments would revise all emission limits in the EG, except for carbon monoxide (CO) limits for two subcategories of combustors, and all nine emission limits in the NSPS.. Comments must be received on or before 25 March 2024. POC is Charlene E. Spells, Sector Policies and Programs Division (E143–05), Office of Air Quality Planning and Standards, EPA, Research Triangle Park, P.O. Box 12055, North Carolina 27711; tele: (919) 541–5255; email:spells.charlene@epa.gov.
(Federal Register 23 January 2024 [Proposed Rule] pages 4243-4268)