{"data":{"id":"us/40-cfr-63.9581","jurisdiction":"us","citation":"40 CFR 63.9581","heading":"Am I subject to this subpart?","body":"You are subject to this subpart if you own or operate a taconite iron ore processing plant that is (or is part of) a major source of hazardous air pollutant (HAP) emissions. Your taconite iron ore processing plant is a major source of HAP if it emits or has the potential to emit any single HAP at a rate of 10 tons or more per year or any combination of HAP at a rate of 25 tons or more per year.","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 RRRRR—National Emission Standards for Hazardous Air Pollutants: Taconite Iron Ore Processing"],"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":"ca15092be22dcaf1ce3a03218deeab8a7358c0c645d680c9925141b8c7ea3817","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.9580","next":"us/40-cfr-63.9582"},"notice":"GroundRules: Original legal text. Not legal advice."}