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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 following numbers indicate only if rule text and/or historic rule opinions are available for the respective subpart, and explain why flowcharts and requirement reference table (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 subpart 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 BExit the TCEQ1 Requirements for Control Technology Determinations for Major Sources in Accordance With Clean Air Act Sections, Sections 112(g) and 112(j)
Subpart CExit the TCEQ1 List of Hazardous Air Pollutants, Petition Process, Lesser Quantity Designations, Source Category List
Subpart DExit the TCEQ1 Regulations Governing Compliance Extensions for Early Reductions of Hazardous Air Pollutants
Subpart EExit the TCEQ1 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 Exit the TCEQ 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 LExit the TCEQ2 National Emission Standards for Coke Oven Batteries
Subpart MExit the TCEQ2 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 O 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 AAExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants From Phosphoric Acid Manufacturing Plants
Subpart BBExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants From Phosphate Fertilizers Production Plants
Subpart CCExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants From Petroleum Refineries
Subpart DDExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants from Off-Site Waste and Recovery Operations
Subpart EEExit the TCEQ2 National Emission Standards for Magnetic Tape Manufacturing Operations
Subpart FF [Reserved]
Subpart GG 4 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 LLExit the TCEQ2 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 NN 2 National Emission Standards for Hazardous Air Pollutants for Wool Fiberglass Manufacturing At Area Sources
Subpart OOExit the TCEQ5 National Emission Standards for Tanks - Level 1
Subpart PPExit the TCEQ3 National Emission Standards for Containers
Subpart QQExit the TCEQ5 National Emission Standards for Surface Impoundments
Subpart RRExit the TCEQ3 National Emission Standards for Individual Drain Systems
Subpart SSExit the TCEQ5 National Emission Standards for Closed Vent Systems, Control Devices, Recovery Devices and Routing to a Fuel Gas System or a Process
Subpart TTExit the TCEQ5 National Emission Standards for Equipment Leaks - Control Level 1
Subpart UUExit the TCEQ5 National Emission Standards for Equipment Leaks - Control Level 2 Standards
Subpart VVExit the TCEQ5 National Emission Standards for Oil-Water Separators and Organic-Water Separators
Subpart WWExit the TCEQ5 National Emission Standards for Storage Vessels (Tanks) - Control Level 2
Subpart XXExit the TCEQ5 National Emission Standards For Ethylene Manufacturing Process Units: Heat Exchange Systems and Waste Operations
Subpart YYExit the TCEQ4 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 CCCExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Steel Pickling--HCl Process Facilities and Hydrochloric Acid Regeneration Plants
Subpart DDDExit the TCEQ2 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 GGGExit the TCEQ2 National Emission Standards Pharmaceuticals Production
Subpart HHHExit the TCEQ4 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 LLLExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants From the Portland Cement Manufacturing Industry
Subpart MMMExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants for Pesticide Active Ingredient Production
Subpart NNNExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Wool Fiberglass Manufacturing
Subpart OOOExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants Emissions: Manufacture of Amino/Phenolic Resins
Subpart PPPExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants Emissions for Polyether Polyols Production
Subpart QQQExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Primary Copper Smelting
Subpart RRRExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Secondary Aluminum Production
Subpart SSS [Reserved]
Subpart TTTExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Primary Lead Smelting
Subpart UUUExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants for Petroleum Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur Recovery Units.
Subpart VVVExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Publicly Owned Treatment Works
Subpart WWW [Reserved]
Subpart XXXExit the TCEQ2 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 CCCCExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Manufacturing of Nutritional Yeast
Subpart DDDDExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants: Plywood and Composite Wood Products
Subpart EEEEExit the TCEQ4 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 HHHHExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Wet-Formed Fiberglass Mat Production
Subpart IIIIExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Surface Coating of Automobiles and Light-Duty Trucks
Subpart JJJJExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants: Paper and Other Web Coating
Subpart KKKKExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Surface Coating of Metal Cans
Subpart MMMMExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants for Surface Coating of Miscellaneous Metal Parts and Products
Subpart NNNNExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Surface Coating of Large Appliances
Subpart OOOOExit the TCEQ2 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 QQQQExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants: Surface Coating of Wood Building Products
Subpart RRRRExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Surface Coating of Metal Furniture
Subpart SSSSExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Surface Coating of Metal Coil
Subpart TTTTExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Leather Finishing Operations
Subpart UUUUExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Cellulose Products Manufacturing
Subpart VVVVExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Boat Manufacturing
Subpart WWWWExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants: Reinforced Plastic Composites Production
Subpart XXXXExit the TCEQ2 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 AAAAAExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Lime Manufacturing Plants
Subpart BBBBBExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Semiconductor Manufacturing
Subpart CCCCCExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Coke Ovens: Pushing, Quenching, and Battery Stacks
Subpart DDDDDExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants for Industrial for Institutional, Commercial, and Industrial Boilers and Process Heaters
Subpart EEEEEExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Iron and Steel Foundries
Subpart FFFFFExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Integrated Iron and Steel Manufacturing Facilities
Subpart GGGGGExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants: Site Remediation
Subpart HHHHHExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Miscellaneous Coating Manufacturing
Subpart IIIIIExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Mercury Emissions From Mercury Cell Chlor-Alkali Plants
Subpart JJJJJExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants for Brick and Structural Clay Products Manufacturing
Subpart KKKKKExit the TCEQ 2 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 MMMMMExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Flexible Polyurethane Foam Fabrication Operations
Subpart NNNNNExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Hydrochloric Acid Production
Subpart OOOOO [Reserved]
Subpart PPPPPExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Engine Test Cells/Stands
Subpart QQQQQExit the TCEQ2 National Emission Standardss for Hazardous Air Pollutants for Friction Materials Manufacturing Facilities
Subpart RRRRRExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Taconite Iron Ore Processing
Subpart SSSSSExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Refractory Products Manufacturing
Subpart TTTTTExit the TCEQ2 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 WWWWWExit the TCEQ2 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 ZZZZZExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Iron and Steel Foundries Area Sources
Subpart AAAAAA [Reserved]
Subpart BBBBBBExit the TCEQ4 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 DDDDDDExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Polyvinyl Chloride and Copolymers Production Area Sources
Subpart EEEEEEExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Primary Copper Smelting Area Sources
Subpart FFFFFFExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Secondary Copper Smelting Area Sources
Subpart GGGGGGExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Primary Nonferrous Metals Area Sources—Zinc, Cadmium, and Beryllium
Subpart HHHHHHExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Paint Stripping and Miscellaneous Surface Coating Operations at Area Sources
Subpart IIIIII [Reserved]
Subpart JJJJJJExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers Area Sources
Subpart KKKKKK [Reserved]
Subpart LLLLLLExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Acrylic and Modacrylic Fibers Production Area Sources
Subpart MMMMMMExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Carbon Black Production Area Sources
Subpart NNNNNNExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Chemical Manufacturing Area Sources: Chromium Compounds
Subpart OOOOOOExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Flexible Polyurethane Foam Production and Fabrication Area Sources
Subpart PPPPPPExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Lead Acid Battery Manufacturing Area Sources
Subpart QQQQQQExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Wood Preserving Area Sources
Subpart RRRRRRExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Clay Ceramics Manufacturing Area Sources
Subpart SSSSSSExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Glass Manufacturing Area Sources
Subpart TTTTTTExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Secondary Nonferrous Metals Processing Area Sources
Subpart UUUUUU [Reserved]
Subpart VVVVVVExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants for Chemical Manufacturing Area Sources
Subpart WWWWWWExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Area Source Standards for Plating and Polishing Operations
Subpart XXXXXXExit the TCEQ4 National Emission Standards for Hazardous Air Pollutants Area Source Standards for Nine Metal Fabrication and Finishing Source Categories
Subpart YYYYYYExit the TCEQ1 National Emission Standards for Hazardous Air Pollutants for Area Sources: Ferroalloys Production Facilities
Subpart ZZZZZZExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants Area Source Standards for Aluminum, Copper, and Other Nonferrous Foundries
Subpart AAAAAAAExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing
Subpart BBBBBBBExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Area Sources: Chemical Preparations Industry
Subpart CCCCCCCExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants for Area Sources: Paints and Allied Products Manufacturing
Subpart DDDDDDDExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Area Source Standards for Prepared Feeds Manufacturing
Subpart EEEEEEEExit the TCEQ2 National Emission Standards for Hazardous Air Pollutants: Gold Mine Ore Processing and Production Area Source Category
Subpart FFFFFFF Reserved
Subpart GGGGGGG Reserved
Subpart HHHHHHHExit the TCEQ 2 National Emission Standards for Hazardous Air Pollutant Emissions for Polyvinyl Chloride and Copolymers Production

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