CFR›Title 40›Chapter I›Part 63›Subpart FFFFFF ContainsSubject groups Applicability and Compliance Dates–Standards and Compliance RequirementsCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Subpart FFFFFF—National Emission Standards for Hazardous Air Pollutants for Secondary Copper Smelting Area Sources Subject Groups Applicability and Compliance Dates Applicability and Compliance Dates Sections 63.11153–63.11154 Other Requirements and Information Other Requirements and Information Sections 63.11157–63.11159; Appendix Table 1 to Subpart FFFFFF of Part 63 Standards and Compliance Requirements Standards and Compliance Requirements Sections 63.11155–63.11156 Source72 FR 2952, Jan. 23, 2007, unless otherwise noted. Previous FFFFF Subpart FFFFF—National Emission Standards for Hazardous Air Pollutants for Integrated Iron and Steel Manufacturing Facilities Next G Subpart G—National Emission Standards for Hazardous Air Pollutants From the Synthetic Organic Chemical Manufacturing Industry for Process Vents, Storage Vessels, Transfer Operations, and Wastewater
Subpart FFFFFF—National Emission Standards for Hazardous Air Pollutants for Secondary Copper Smelting Area Sources