{"data":{"id":"us/40-cfr-63.5285","jurisdiction":"us","citation":"40 CFR 63.5285","heading":"Am I subject to this subpart?","body":"(a) You are subject to this subpart if you own or operate a leather finishing operation that is a major source of hazardous air pollutants (HAP) emissions or that is located at, or is part of, a major source of HAP emissions. A leather finishing operation is defined in § 63.5460. In general, a leather finishing operation is a single process or group of processes used to adjust and improve the physical and aesthetic characteristics of the leather surface through multistage application of a coating comprised of dyes, pigments, film-forming materials, and performance modifiers dissolved or suspended in liquid carriers.\n(b) You are a major source of HAP emissions if you own or operate a plant site that emits or has the potential to emit any single HAP at a rate of 10 tons (9.07 megagrams) or more per year or any combination of HAP at a rate of 25 tons (22.68 megagrams) or more per year.\n(c) You are not subject to this subpart if your source finishes leather solely for the purpose of research and development.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES","Subpart TTTT—National Emission Standards for Hazardous Air Pollutants for Leather Finishing Operations"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"989104222bfa5494e5d06ae28ced6d29508a80fcd4419022413c11cfb93bd671","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.5280","next":"us/40-cfr-63.5290"},"notice":"GroundRules: Original legal text. Not legal advice."}