{"data":{"id":"us/40-cfr-63.7942","jurisdiction":"us","citation":"40 CFR 63.7942","heading":"When must I conduct subsequent performance tests?","body":"For non-flare control devices, you must conduct performance tests at any time the EPA requires you to according to § 63.7(a)(3).","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 GGGGG—National Emission Standards for Hazardous Air Pollutants: Site Remediation"],"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":"2906eab75fabd4d1ba7d43bf3162f16e6d34a782f2d6a5ce9d427ae68e09af03","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.7941","next":"us/40-cfr-63.7943"},"notice":"GroundRules: Original legal text. Not legal advice."}