| A | General Provisions |
| B | Requirements for Control Technology Determinations for Major Sources in Accordance with CAA Sections 112(g) and 112(j) |
| C | List of Hazardous Air Pollutants, Petition Process, Lesser Quanitity Designations, Source Category List |
| D | Regulations Governing Compliance Extensions for Early Reductions of Hazardous Air Pollutants |
| E | Approval of State Programs and Delegation of Federal Authorities |
| F | Synthetic Organic Chemical Manufacturing Industry |
| G | Synthetic Organic Chemical Manufacturing Industry: Process Vents, Storage Vessels, Transfer Operations, and Wastewater |
| H | Equipment Leaks |
| I | Processes Subject to the Negotiated Regulation for Equipment Leaks |
| J | Polyvinyl Chloride and Copolymers Production |
| K | (Reserved) |
| L | Coke Oven Batteries |
| M | Perchloroethylene Dry Cleaning |
| N | Hard and Decorative Chromium Electroplating and Chromium Anodizing Tanks |
| O | Ethylene Oxide Sterilization Facilities |
| P | (Reserved) |
| Q | Industrial Process Cooling Towers |
| R | Gasoline Distribution Facilities (Bulk Gasoline Terminals and Pipeline Breakout Stations) |
| S | Pulp and Paper Industry |
| T | Halogenated Solvent Cleaning |
| U | Group 1 Polymers and Resins (Elastomers) |
| V | (Reserved) |
| W | Epoxy Resins Production and Non-Nylon Polyamides Production |
| X | Secondary Lead Smelting |
| Y | Marine Tank Vessel Loading Operations |
| Z | (Reserved) |
| AA | Phosphoric Acid Manufacturing Plants |
| BB | Phosphate Fertilizers Production Plants |
| CC | Petroleum Refineries |
| DD | Off-Site Waste and Recovery Operations |
| EE | Magnetic Tape Manufacturing Operations |
| FF | (Reserved) |
| GG | Aerospace Manufacturing and Rework Facilities |
| HH | Oil and Natural Gas Production Facilities |
| II | Shipbuilding and Ship Repair (Surface Coating) |
| JJ | Wood Furniture Manufacturing Operations |
| KK | Printing and Publishing |
| LL | Primary Aluminum Reduction Plants |
| MM | Chemical Recovery Combustion Sources at Kraft, Soda, Sulfite, and Stand-Alone Semichemical Pulp Mills |
| NN | (Reserved) |
| OO | Tanks - Level 1 |
| PP | Containers |
| QQ | Surface Impoundments |
| RR | Individual Drain Systems |
| SS | Closed Vent Systems, Control Devices, Recovery Devices and Routing to a Fuel Gas System or a Process |
| TT | Equipment Leaks - Control Level 1 |
| UU | Equipment Leaks - Control Level 2 |
| VV | Oil-Water Separators and Organic-Water Separators |
| WW | Storage Vessels (Tanks) - Control Level 2 |
| XX | Ethylene Manufacturing Process Units: Heat Exchange Systems and Waste Operations |
| YY | Generic Maximum Achievable Control Technology Standards |
| ZZ | (Reserved) |
| AAA | (Reserved) |
| BBB | (Reserved) |
| CCC | Steel Pickling - HCl Process Facilities and Hydrochloric Acid Regeneration Plants |
| DDD | Mineral Wool Production |
| EEE | Hazardous Waste Combustors |
| FFF | (Reserved) |
| GGG | Pharmaceuticals Production |
| HHH | Natural Gas Transmission and Storage Facilities |
| III | Flexible Polyurethane Foam Production |
| JJJ | Goup IV Polymers and Resins (thermoplastics) |
| KKK | (Reserved) |
| LLL | Portland Cement Manufacturing Industry |
| MMM | Pesticide Active Ingredient Production |
| NNN | Wool Fiberglass Manufacturing |
| OOO | Manufacture of Amino/Phenolic Resins |
| PPP | Polyether Polyols Production |
| QQQ | Primary Copper Smelting |
| RRR | Secondary Aluminum Production |
| SSS | (Reserved) |
| TTT | Primary Lead Smelting |
| UUU | Petroleum Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur Recovery Units |
| VVV | Publicly Owned Treatment Works |
| WWW | (Reserved) |
| XXX | Ferroalloys Production: Ferromanganese and Silicomanganese |
| YYY | (Reserved) |
| ZZZ | (Reserved) |
| AAAA | Municipal Solid Waste Landfills |
| BBBB | (Reserved) |
| CCCC | Manufacturing of Nutritional Yeast |
| DDDD | Plywood and Composite Wood Products |
| EEEE | Organic Liquids Distribution (non-gasoline) |
| FFFF | Miscellaneous Organic Chemical Manufacturing (MON) |
| GGGG | Solvent Extraction for Vegetable Oil Production |
| HHHH | Wet-Formed Fiberglass Mat Production |
| IIII | Auto and Light Duty Trucks (surface coating) |
| JJJJ | Paper and Other Web (surface coating) |
| KKKK | Metal Can Coating |
| LLLL | (Reserved) |
| MMMM | Miscellaneous Metal Parts and Products |
| NNNN | Large Appliances (surface coating) |
| OOOO | Fabric Printing, Coating, and Dyeing |
| PPPP | Plastic Parts (surface coating) |
| QQQQ | Wood Building Products |
| RRRR | Metal Furniture (surface coating) |
| SSSS | Surface Coating of Metal Coil |
| TTTT | Leather Finishing Operations |
| UUUU | Cellulose Products Manufacturing |
| VVVV | Boat Manufacturing |
| WWWW | Reinforced Plastic Composites Production |
| XXXX | Rubber Tire Manufacturing |
| YYYY | Stationary Combustion Turbines |
| ZZZZ | Reciprocating Internal Combustion Engines |
| AAAAA | Lime Manufacturing |
| BBBBB | Semiconductor Manufacturing |
| CCCCC | Coke Ovens: Pushing, Quenching, and Battery Stacks |
| DDDDD | Industrial, Commercial, and Institutional Boilers and Process Heaters |
| EEEEE | Iron and Steel Foundries |
| FFFFF | Integrated Iron and Steel |
| GGGGG | Site Remediation |
| HHHHH | Miscellaneous Coating Manufacturing |
| IIIII | Mercury Cell Chlor-Alkali Plants |
| JJJJJ | Brick and Structural Clay Products Manufacturing |
| KKKKK | Clay Ceramics Manufacturing |
| LLLLL | Asphalt Processing and Asphalt Roofing Manufacturing |
| MMMMM | Flexible Polyurethane Foam Fabrication Operation |
| NNNNN | Hydrochloric Acid Production |
| OOOOO | (Reserved) |
| PPPPP | Engine Test Cells/Stands |
| QQQQQ | Friction Products Manufacturing |
| RRRRR | Taconite Iron Ore Processing |
| SSSSS | Refractory Products Manufacturing |
| TTTTT | Primary Magnesium Refining |
| UUUUU | (Reserved) |
| VVVVV | (Reserved) |
| WWWWW | Hospital Ethylene Oxide Sterilizers Area Sources |
| XXXXX | (Reserved) |
| YYYYY | Electric Arc Furnace Steelmaking Facilities (Area Sources) |
| ZZZZZ | Iron and Steel Foundries Area Sources |
| AAAAAA | (Reserved) |
| BBBBBB | Gasoline Distribution Bulk Terminals, Bulk Plants, and Pipeline Facilities |
| CCCCCC | Gasoline Dispensing Facilities |
| DDDDDD | Polyvinyl Chloride and Copolymers Production Area Sources |
| EEEEEE | Primary Copper Smelting Area Sources |
| FFFFFF | Secondary Copper Smelting Area Sources |
| GGGGGG | Primary Nonferrous Metals Area Sources - Zinc, Cadmium, and Beryllium |
| HHHHHH | Paint Stripping and Miscellaneous Surface Coating Operations at Area Sources |
| IIIIII | (Reserved) |
| JJJJJJ | (Reserved) |
| KKKKKK | (Reserved) |
| LLLLLL | Acrylic and Modacrylic Fibers Production Area Sources |
| MMMMMM | Carbon Black Production Area Sources |
| NNNNNN | Chemical Manufacturing Area Sources: Chromium Compounds |
| OOOOOO | Flexible Polyurethane Foam Production and Fabrication Area Sources |
| PPPPPP | Lead Acid Battery Manufacturing Area Sources |
| QQQQQQ | Wood Preserving Area Sources |
| RRRRRR | Clay Ceramics Manufacturing Area Sources |
| SSSSSS | Glass Manufacturing Area Sources |
| TTTTTT | Secondary Nonferrous Metals Processing Area Sources |
| UUUUUU | (Reserved) |
| VVVVVV | (Reserved) |
| WWWWWW | Plating and Polishing Operations Area Sources |
| XXXXXX | Metal Fabrication and Finishing Area Sources |
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