40 CFR Part 63
A listing of 40 CFR Part 63 Subparts. Each subpart has Decision Support System components specific to that portion of the regulations.
National Emission Standards for Hazardous Air Pollutants for Source Categories (a.k.a. Maximum Achievable Control Technology (MACT))
The flowchart and requirement reference table (RRT) footers include an amended date. The amended date is the date of the rule text amendment that is incorporated into the flowchart and RRT; it may not be the date the rule was last amended. The following numbers indicate only if rule text and/or historic rule opinions are available for the respective subpart, and explain why flowcharts and RRT are not included.
- " 1 " RRT and flowcharts will not be developed for general provisions or emission guidelines.
- " 2 " RRT and flowcharts will not be developed for these rules because there are less than 5 sites in Texas.
- " 3 " RRT and flowcharts will not be developed for these rules because they are sitewide requirements.
- " 4 " RRT and flowcharts for these rules are currently in development and will be provided as they are finalized.
- " 5 " RRT and flowcharts will not be developed for these rules because these subparts are referenced subparts of 40 CFR parts 60, 61, or 63.
A - Z | AA - ZZ | AAA - ZZZ | AAAA - ZZZZ | AAAAA - ZZZZZ | AAAAAA - ZZZZZZ | AAAAAAA - ZZZZZZZ |
| Subparts | Description |
|---|---|
| Subpart A | General Provisions |
| Subpart B1 | Requirements for Control Technology Determinations for Major Sources in Accordance With Clean Air Act Sections, Sections 112(g) and 112(j) |
| Subpart C1 | List of Hazardous Air Pollutants, Petition Process, Lesser Quantity Designations, Source Category List |
| Subpart D1 | Regulations Governing Compliance Extensions for Early Reductions of Hazardous Air Pollutants |
| Subpart E1 | Approval of State Programs and Delegation of Federal Authorities |
| Subpart F | National Emission Standards for Organic Hazardous Air Pollutants From the Synthetic Organic Chemical Manufacturing Industry |
| Subpart G | National Emission Standards for Organic Hazardous Air Pollutants From the Synthetic Organic Chemical Manufacturing Industry Process Vents, Storage Vessels, Transfer Operations, and Wastewater |
| Subpart H | National Emission Standards for Organic Hazardous Air Pollutants for Equipment Leaks |
| Subpart I | National Emission Standards for Organic Hazardous Air Pollutants for Certain Processes Subject to the Negotiated Regulation for Equipment Leaks |
| Subpart J | National Emission Standards for Hazardous Air Pollutants for Polyvinyl Chloride and Copolymers Production (This subpart has been vacated by court action) |
| Subpart K | [Reserved] |
| Subpart L2 | National Emission Standards for Coke Oven Batteries |
| Subpart M2 | National Perchloroethylene Air Emission Standards for Dry Cleaning Facilities |
| Subpart N | National Emission Standards for Chromium Emissions From Hard and Decorative Chromium Electroplating and Chromium Anodizing Tanks |
| Subpart O2 | Ethylene Oxide Emissions Standards for Sterilization Facilities |
| Subpart P | [Reserved] |
| Subpart Q | National Emission Standards for Hazardous Air Pollutants for Industrial Process Cooling Towers |
| Subpart R | National Emission Standards for Gasoline Distribution Facilities (Bulk Gasoline Terminals and Pipeline Breakout Stations) |
| Subpart S | National Emission Standards for Hazardous Air Pollutants from the Pulp and Paper Industry |
| Subpart T | National Emission Standards for Halogenated Solvent Cleaning |
| Subpart U | National Emission Standards for Hazardous Air Pollutant Emissions: Group I Polymers and Resins |
| Subpart V | [Reserved] |
| Subpart W | National Emission Standards for Hazardous Air Pollutants for Epoxy Resins Production and Non-Nylon Polyamides Production |
| Subpart X | National Emission Standards for Hazardous Air Pollutants from Secondary Lead Smelting |
| Subpart Y | National Emission Standards for Marine Tank Vessel Loading Operations |
| Subpart Z | [Reserved] |
| Subpart AA2 | National Emission Standards for Hazardous Air Pollutants From Phosphoric Acid Manufacturing Plants |
| Subpart BB2 | National Emission Standards for Hazardous Air Pollutants From Phosphate Fertilizers Production Plants |
| Subpart CC | National Emission Standards for Hazardous Air Pollutants From Petroleum Refineries |
| Subpart DD4 | National Emission Standards for Hazardous Air Pollutants from Off-Site Waste and Recovery Operations |
| Subpart EE2 | National Emission Standards for Magnetic Tape Manufacturing Operations |
| Subpart FF | [Reserved] |
| Subpart GG4 | National Emission Standards for Aerospace Manufacturing and Rework Facilities |
| Subpart HH | National Emission Standards for Hazardous Air Pollutants From Oil and Natural Gas Production Facilities |
| Subpart II | National Emission Standards for Shipbuilding and Ship Repair (Surface Coating) |
| Subpart JJ | National Emission Standards for Wood Furniture Manufacturing Operations |
| Subpart KK | National Emission Standard for the Printing and Publishing Industry |
| Subpart LL2 | National Emission Standards for Hazardous Air Pollutants for Primary Aluminum Reduction Plants |
| Subpart MM | National Emission Standards for Hazardous Air Pollutants for Chemical Recovery Combustion Sources at Kraft, Soda, Sulfite, and Stand-Alone Semichemical Pulp Mills |
| Subpart NN2 | National Emission Standards for Hazardous Air Pollutants for Wool Fiberglass Manufacturing At Area Sources |
| Subpart OO5 | National Emission Standards for Tanks - Level 1 |
| Subpart PP3 | National Emission Standards for Containers |
| Subpart QQ5 | National Emission Standards for Surface Impoundments |
| Subpart RR 3 | National Emission Standards for Individual Drain Systems |
| Subpart SS5 | National Emission Standards for Closed Vent Systems, Control Devices, Recovery Devices and Routing to a Fuel Gas System or a Process |
| Subpart TT5 | National Emission Standards for Equipment Leaks - Control Level 1 |
| Subpart UU5 | National Emission Standards for Equipment Leaks - Control Level 2 Standards |
| Subpart VV5 | National Emission Standards for Oil-Water Separators and Organic-Water Separators |
| Subpart WW5 | National Emission Standards for Storage Vessels (Tanks) - Control Level 2 |
| Subpart XX5 | National Emission Standards For Ethylene Manufacturing Process Units: Heat Exchange Systems and Waste Operations |
| Subpart YY4 | National Emission Standards for Hazardous Air Pollutants for Source Categories: Generic Maximum Achievable Control Technology Standards |
| Subpart ZZ | [Reserved] |
| Subpart AAA | [Reserved] |
| Subpart BBB | [Reserved] |
| Subpart CCC2 | National Emission Standards for Hazardous Air Pollutants for Steel Pickling--HCl Process Facilities and Hydrochloric Acid Regeneration Plants |
| Subpart DDD2 | National Emission Standards for Hazardous Air Pollutants for Mineral Wool Production |
| Subpart EEE | National Emission Standards for Hazardous Air Pollutants from Hazardous Waste Combustors |
| Subpart FFF | [Reserved] |
| Subpart GGG2 | National Emission Standards Pharmaceuticals Production |
| Subpart HHH4 | National Emission Standards for Hazardous Air Pollutants From Natural Gas Transmission and Storage Facilities |
| Subpart III | National Emission Standards for Hazardous Air Pollutants for Flexible Polyurethane Foam Production |
| Subpart JJJ | National Emission Standards for Hazardous Air Pollutant Emissions: Group IV Polymers and Resins |
| Subpart KKK | [Reserved] |
| Subpart LLL4 | National Emission Standards for Hazardous Air Pollutants From the Portland Cement Manufacturing Industry |
| Subpart MMM4 | National Emission Standards for Hazardous Air Pollutants for Pesticide Active Ingredient Production |
| Subpart NNN2 | National Emission Standards for Hazardous Air Pollutants for Wool Fiberglass Manufacturing |
| Subpart OOO2 | National Emission Standards for Hazardous Air Pollutants Emissions: Manufacture of Amino/Phenolic Resins |
| Subpart PPP4 | National Emission Standards for Hazardous Air Pollutants Emissions for Polyether Polyols Production |
| Subpart QQQ2 | National Emission Standards for Hazardous Air Pollutants for Primary Copper Smelting |
| Subpart RRR2 | National Emission Standards for Hazardous Air Pollutants for Secondary Aluminum Production |
| Subpart SSS | [Reserved] |
| Subpart TTT2 | National Emission Standards for Hazardous Air Pollutants for Primary Lead Smelting |
| Subpart UUU | National Emission Standards for Hazardous Air Pollutants for Petroleum Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur Recovery Units. |
| Subpart VVV2 | National Emission Standards for Hazardous Air Pollutants: Publicly Owned Treatment Works |
| Subpart WWW | [Reserved] |
| Subpart XXX2 | National Emission Standards for Hazardous Air Pollutants for Ferroalloys Production: Ferromanganese and Silicomanganese |
| Subpart AAAA | National Emission Standards for Hazardous Air Pollutants: Municipal Solid Waste Landfills |
| Subpart BBBB | [Reserved] |
| Subpart CCCC2 | National Emission Standards for Hazardous Air Pollutants: Manufacturing of Nutritional Yeast |
| Subpart DDDD4 | National Emission Standards for Hazardous Air Pollutants: Plywood and Composite Wood Products |
| Subpart EEEE4 | National Emission Standards for Hazardous Air Pollutants: Organic Liquids Distribution (Non-Gasoline) |
| Subpart FFFF | National Emission Standards for Hazardous Air Pollutants: Miscellaneous Organic Chemical Manufacturing |
| Subpart GGGG | National Emission Standards for Hazardous Air Pollutants: Solvent Extractions for Vegetable Oil Production |
| Subpart HHHH2 | National Emission Standards for Hazardous Air Pollutants for Wet-Formed Fiberglass Mat Production |
| Subpart IIII2 | National Emission Standards for Hazardous Air Pollutants: Surface Coating of Automobiles and Light-Duty Trucks |
| Subpart JJJJ4 | National Emission Standards for Hazardous Air Pollutants: Paper and Other Web Coating |
| Subpart KKKK2 | National Emission Standards for Hazardous Air Pollutants: Surface Coating of Metal Cans |
| Subpart MMMM4 | National Emission Standards for Hazardous Air Pollutants for Surface Coating of Miscellaneous Metal Parts and Products |
| Subpart NNNN2 | National Emission Standards for Hazardous Air Pollutants: Surface Coating of Large Appliances |
| Subpart OOOO2 | National Emission Standards for Hazardous Air Pollutants: Printing, Coating, and Dyeing of Fabrics and Other Textiles |
| Subpart PPPP | National Emission Standards for Hazardous Air Pollutants for Surface Coating of Plastic Parts and Products |
| Subpart QQQQ2 | National Emission Standards for Hazardous Air Pollutants: Surface Coating of Wood Building Products |
| Subpart RRRR2 | National Emission Standards for Hazardous Air Pollutants: Surface Coating of Metal Furniture |
| Subpart SSSS2 | National Emission Standards for Hazardous Air Pollutants: Surface Coating of Metal Coil |
| Subpart TTTT2 | National Emission Standards for Hazardous Air Pollutants for Leather Finishing Operations |
| Subpart UUUU2 | National Emission Standards for Hazardous Air Pollutants for Cellulose Products Manufacturing |
| Subpart VVVV2 | National Emission Standards for Hazardous Air Pollutants for Boat Manufacturing |
| Subpart WWWW | National Emission Standards for Hazardous Air Pollutants: Reinforced Plastic Composites Production |
| Subpart XXXX2 | National Emission Standards for Hazardous Air Pollutants: Rubber Tire Manufacturing |
| Subpart YYYY | National Emission Standards for Hazardous Air Pollutants for Stationary Combustion Turbines |
| Subpart ZZZZ | National Emission Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines |
| Subpart AAAAA2 | National Emission Standards for Hazardous Air Pollutants for Lime Manufacturing Plants |
| Subpart BBBBB2 | National Emission Standards for Hazardous Air Pollutants for Semiconductor Manufacturing |
| Subpart CCCCC2 | National Emission Standards for Hazardous Air Pollutants for Coke Ovens: Pushing, Quenching, and Battery Stacks |
| Subpart DDDDD | National Emission Standards for Hazardous Air Pollutants for Industrial for Institutional, Commercial, and Industrial Boilers and Process Heaters |
| Subpart EEEEE2 | National Emission Standards for Hazardous Air Pollutants for Iron and Steel Foundries |
| Subpart FFFFF2 | National Emission Standards for Hazardous Air Pollutants for Integrated Iron and Steel Manufacturing Facilities |
| Subpart GGGGG | National Emission Standards for Hazardous Air Pollutants: Site Remediation |
| Subpart HHHHH2 | National Emission Standards for Hazardous Air Pollutants: Miscellaneous Coating Manufacturing |
| Subpart IIIII2 | National Emission Standards for Hazardous Air Pollutants: Mercury Emissions From Mercury Cell Chlor-Alkali Plants |
| Subpart JJJJJ | National Emission Standards for Hazardous Air Pollutants for Brick and Structural Clay Products Manufacturing |
| Subpart KKKKK2 | National Emission Standards for Hazardous Air Pollutants for Clay Ceramics Manufacturing |
| Subpart LLLLL | National Emission Standards for Hazardous Air Pollutants: Asphalt Processing and Asphalt Roofing Manufacturing |
| Subpart MMMMM2 | National Emission Standards for Hazardous Air Pollutants: Flexible Polyurethane Foam Fabrication Operations |
| Subpart NNNNN2 | National Emission Standards for Hazardous Air Pollutants: Hydrochloric Acid Production |
| Subpart OOOOO | [Reserved] |
| Subpart PPPPP2 | National Emission Standards for Hazardous Air Pollutants for Engine Test Cells/Stands |
| Subpart QQQQQ2 | National Emission Standards for Hazardous Air Pollutants for Friction Materials Manufacturing Facilities |
| Subpart RRRRR2 | National Emission Standards for Hazardous Air Pollutants: Taconite Iron Ore Processing |
| Subpart SSSSS2 | National Emission Standards for Hazardous Air Pollutants for Refractory Products Manufacturing |
| Subpart TTTTT2 | National Emission Standards for Hazardous Air Pollutants for Primary Magnesium Refining |
| Subpart UUUUU | National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units |
| Subpart VVVVV | [Reserved] |
| Subpart WWWWW2 | National Emission Standards for Hospital Ethylene Oxide Sterilizers |
| Subpart XXXXX | [Reserved] |
| Subpart YYYYY | National Emission Standards for Hazardous Air Pollutants for Area/Sources: Electric Arc Furnace Steelmaking Facilities |
| Subpart ZZZZZ2 | National Emission Standards for Hazardous Air Pollutants for Iron and Steel Foundries Area Sources |
| Subpart AAAAAA | [Reserved] |
| Subpart BBBBBB | National Emission Standards for Hazardous Air Pollutants for Source Category: Gasoline Distribution Bulk Terminals, Bulk Plants, and Pipeline Facilities |
| Subpart CCCCCC | National Emission Standards for Hazardous Air Pollutants for Source Category: Gasoline Dispensing Facilities |
| Subpart DDDDDD2 | National Emission Standards for Hazardous Air Pollutants for Polyvinyl Chloride and Copolymers Production Area Sources |
| Subpart EEEEEE2 | National Emission Standards for Hazardous Air Pollutants for Primary Copper Smelting Area Sources |
| Subpart FFFFFF2 | National Emission Standards for Hazardous Air Pollutants for Secondary Copper Smelting Area Sources |
| Subpart GGGGGG2 | National Emission Standards for Hazardous Air Pollutants for Primary Nonferrous Metals Area Sources—Zinc, Cadmium, and Beryllium |
| Subpart HHHHHH2 | National Emission Standards for Hazardous Air Pollutants: Paint Stripping and Miscellaneous Surface Coating Operations at Area Sources |
| Subpart IIIIII | [Reserved] |
| Subpart JJJJJJ4 | National Emission Standards for Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers Area Sources |
| Subpart KKKKKK | [Reserved] |
| Subpart LLLLLL2 | National Emission Standards for Hazardous Air Pollutants for Acrylic and Modacrylic Fibers Production Area Sources |
| Subpart MMMMMM2 | National Emission Standards for Hazardous Air Pollutants for Carbon Black Production Area Sources |
| Subpart NNNNNN2 | National Emission Standards for Hazardous Air Pollutants for Chemical Manufacturing Area Sources: Chromium Compounds |
| Subpart OOOOOO2 | National Emission Standards for Hazardous Air Pollutants for Flexible Polyurethane Foam Production and Fabrication Area Sources |
| Subpart PPPPPP2 | National Emission Standards for Hazardous Air Pollutants for Lead Acid Battery Manufacturing Area Sources |
| Subpart QQQQQQ2 | National Emission Standards for Hazardous Air Pollutants for Wood Preserving Area Sources |
| Subpart RRRRRR2 | National Emission Standards for Hazardous Air Pollutants for Clay Ceramics Manufacturing Area Sources |
| Subpart SSSSSS2 | National Emission Standards for Hazardous Air Pollutants for Glass Manufacturing Area Sources |
| Subpart TTTTTT2 | National Emission Standards for Hazardous Air Pollutants for Secondary Nonferrous Metals Processing Area Sources |
| Subpart UUUUUU | [Reserved] |
| Subpart VVVVVV4 | National Emission Standards for Hazardous Air Pollutants for Chemical Manufacturing Area Sources |
| Subpart WWWWWW2 | National Emission Standards for Hazardous Air Pollutants: Area Source Standards for Plating and Polishing Operations |
| Subpart XXXXXX4 | National Emission Standards for Hazardous Air Pollutants Area Source Standards for Nine Metal Fabrication and Finishing Source Categories |
| Subpart YYYYYY1 | National Emission Standards for Hazardous Air Pollutants for Area Sources: Ferroalloys Production Facilities |
| Subpart ZZZZZZ2 | National Emission Standards for Hazardous Air Pollutants Area Source Standards for Aluminum, Copper, and Other Nonferrous Foundries |
| Subpart AAAAAAA2 | National Emission Standards for Hazardous Air Pollutants for Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing |
| Subpart BBBBBBB2 | National Emission Standards for Hazardous Air Pollutants for Area Sources: Chemical Preparations Industry |
| Subpart CCCCCCC2 | National Emission Standards for Hazardous Air Pollutants for Area Sources: Paints and Allied Products Manufacturing |
| Subpart DDDDDDD2 | National Emission Standards for Hazardous Air Pollutants: Area Source Standards for Prepared Feeds Manufacturing |
| Subpart EEEEEEE2 | National Emission Standards for Hazardous Air Pollutants: Gold Mine Ore Processing and Production Area Source Category |
| Subpart FFFFFFF | Reserved |
| Subpart GGGGGGG | Reserved |
| Subpart HHHHHHH2 | National Emission Standards for Hazardous Air Pollutant Emissions for Polyvinyl Chloride and Copolymers Production |
Questions? We Can Help
If you have questions contact the Air Permits Division.