{"data":{"id":"us/40-cfr-table-1-to-subpart-ffff-of-part-63","jurisdiction":"us","citation":"40 CFR Table 1 to Subpart FFFF of Part 63","heading":"Table 1 to Subpart FFFF of Part 63—Emission Limits and Work Practice Standards for Continuous Process Vents","body":"As required in § 63.2455, you must meet each emission limit and work practice standard in the following table that applies to your continuous process vents:\nFor each . . . For which . . . Then you must . . .\n1. Group 1 continuous process vent a. Not applicable i. Reduce emissions of total organic HAP by ≥98 percent by weight or to an outlet process concentration ≤20 ppmv as organic HAP or TOC by venting emissions through a closed-vent system to any combination of control devices (except a flare); or\nii. Reduce emissions of total organic HAP by venting emissions through a closed vent system to a flare; or\niii. Use a recovery device to maintain the TRE above 1.9 for an existing source or above 5.0 for a new source.\n2. Halogenated Group 1 continuous process vent stream a. You use a combustion control device to control organic HAP emissions i. Use a halogen reduction device after the combustion device to reduce emissions of hydrogen halide and halogen HAP by ≥99 percent by weight, or to ≤0.45 kg/hr, or to ≤20 ppmv; or\nii. Use a halogen reduction device before the combustion device to reduce the halogen atom mass emission rate to ≤0.45 kg/hr or to a concentration ≤20 ppmv.\n3. Group 2 continuous process vent at an existing source You use a recovery device to maintain the TRE level \u003e1.9 but ≤5.0 Comply with the requirements in § 63.2450(e)(4) and the requirements in § 63.993 and the requirements referenced therein.\n4. Group 2 continuous process vent at a new source You use a recovery device to maintain the TRE level \u003e5.0 but ≤8.0 Comply with the requirements in § 63.2450(e)(4) and the requirements in § 63.993 and the requirements referenced therein.\n5. Continuous process vent Beginning no later than the compliance dates specified in § 63.2445(i), the continuous process vent contains ethylene oxide such that it is considered to be in ethylene oxide service as defined in § 63.2550 Comply with the applicable emission limits specified in items 1 through 4 of this Table, and also: i. Reduce emissions of ethylene oxide by venting emissions through a closed-vent system to a flare; or ii. Reduce emissions of ethylene oxide by venting emissions through a closed-vent system to a control device that reduces ethylene oxide by ≥99.9 percent by weight, or to a concentration \u003c1 ppmv for each process vent or to \u003c5 pounds per year for all combined process vents.","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 FFFF—National Emission Standards for Hazardous Air Pollutants: Miscellaneous Organic Chemical Manufacturing"],"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":"e12b80a0131a0ed6699d87aaeaf8d24e12adfcdd2949bbcd3df69caf673fd670","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.2550","next":"us/40-cfr-table-2-to-subpart-ffff-of-part-63"},"notice":"GroundRules: Original legal text. Not legal advice."}