{"data":{"id":"us/40-cfr-63.5121","jurisdiction":"us","citation":"40 CFR 63.5121","heading":"What operating limits must I meet?","body":"(a) Except as provided in paragraph (b) of this section, for any coil coating line for which you use an add-on control device, unless you use a solvent recovery system and conduct a liquid-liquid material balance according to § 63.5170(e)(1), you must meet the applicable operating limits specified in Table 1 to this subpart. You must establish the operating limits during performance tests according to the requirements in § 63.5160(d)(3) and Table 1 to § 63.5160. You must meet the operating limits established during the most recent performance test required in § 63.5160 at all times after you establish them.\n(b) If you use an add-on control device other than those listed in Table 1 to this subpart, or wish to monitor an alternative parameter and comply with a different operating limit, you must apply to the Administrator for approval of alternative monitoring under § 63.8(f).","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 SSSS—National Emission Standards for Hazardous Air Pollutants: Surface Coating of Metal Coil"],"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":"81815004029066bb5ebb90a9bba5bebeb24f1504cc00817280ddf9ce5891021d","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.5120","next":"us/40-cfr-63.5130"},"notice":"GroundRules: Original legal text. Not legal advice."}