{"data":{"id":"us/40-cfr-61.63","jurisdiction":"us","citation":"40 CFR 61.63","heading":"Emission standard for vinyl chloride plants.","body":"An owner or operator of a vinyl chloride plant shall comply with the requirements of this section and § 61.65.\n(a) Vinyl chloride formation and purification: The concentration of vinyl chloride in each exhaust gas stream from any equipment used in vinyl chloride formation and/or purification is not to exceed 10 ppm (average for 3-hour period), except as provided in § 61.65(a). This requirement does not preclude combining of exhaust gas streams provided the combined steam is ducted through a control system from which the concentration of vinyl chloride in the exhaust gases does not exceed 10 ppm, or equivalent as provided in § 61.66. This requirement does not apply to equipment that has been opened, is out of operation, and met the requirement in § 61.65(b)(6)(i) before being opened.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 61—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS","Subpart F—National Emission Standard for Vinyl Chloride"],"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":"dc5148e28cf8e649c7a5e006ab7ae33e78866202ff21b9e058fdd56ecb2b3318","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-61.62","next":"us/40-cfr-61.64"},"notice":"GroundRules: Original legal text. Not legal advice."}