EPA places standards, or requirements, on categories of stationary sources that emit (or have the potential to emit) one or more hazardous air pollutants (HAPs). EPA listed these standards, called National Emission Standards for Hazardous Air Pollutants (NESHAP) standards, and which agency enforces the standards in tables published in the Federal Register, 80 FR 10596, Feb. 27, 2015.

  • Major source of hazardous air pollutants: Refers to any stationary source or group of stationary sources that emits or has the potential to emit 10 tons per year of any of the named HAPs, or 25 tons per year of a mixture of pollutants.
  • Area source of hazardous air pollutants: Refers to facilities that release smaller quantities of toxic air pollutants. Although emission from one area source may be relatively small, multiple area sources concern environmental specialists, especially when they are in densely populated areas.

EPA places NESHAP Area Source Standards on area sources to minimize emissions, which reduces the hazardous area pollutants released by the area sources. These requirements call for specific management practices and generally available control technologies (GACT). These technologies consist of methods, practices and techniques applicable to area sources. When EPA developed these technologies, staff members considered the economic impact as well as the technical abilities of employees to operate and maintain systems for emission control.

Missouri's Area Source Requirements

The Missouri Department of Natural Resources is conducting compliance and enforcement activities for area source requirements in the following table. For questions regarding standards, compliance and reports about area sources, please contact the agency listed as “Regulating Agency” in the table. If you need help navigating the requirements, contact the department's Air Pollution Control Program. The department recommends that facilities submit notifications and other required reports about area sources to the department's Air Pollution Control Program and EPA Region 7 Air Technology Standards Contacts.

Online Compliance Resources

Regulating Agency Description 40 CFR 63 Subpart Title V Permit Keywords Rule and Implementation Information Regulation Helpful Link
MoDNR Hazardous Waste Incineration (Major and area sources) (3E) - EEE Major Permit hazardous waste, aggregate kiln, cement kiln, fuel boiler Hazardous Waste Combustors: NESHAP 40 C.F.R. Part 63 Subpart EEE
EPA Hospital Ethylene Oxide Sterilizers (5W) - WWWWW Exempt hospital Hospital Ethylene Oxide Sterilizers: NESHAP 40 C.F.R. Part 63 Subpart WWWWW http://www.epa.gov/ttn/atwfiles/area/sterilizersb.pdf
EPA Industrial, Commercial and Institutional Boilers (6J) - JJJJJJ Exempt boiler Clean Air Act Standards and Guidelines for Energy, Engines, and Combustion 40 C.F.R. Part 63 Subpart JJJJJJ Small Entity Compliance Guide for Area Source Boilers
EPA Iron and Steel Foundries (5Z) - ZZZZZ Exempt foundry Iron and Steel Foundries: NESHAP 40 C.F.R. Part 63 Subpart ZZZZZ http://www.epa.gov/ttn/atwfiles/area/foundriesb.pdf
EPA Lead Acid Batteries Industry (6P) - PPPPPP Exempt lead Lead Acid Battery Manufacturing Area Sources: NESHAP 40 C.F.R. Part 63 Subpart PPPPPP http://www.epa.gov/ttn/atwfiles/area/labareab.pdf
MoDNR Marine Tank Vessel Loading Operations (Major and new area sources) (1Y) - Y Major Permit vessel Clean Air Act Standards and Guidelines for Petroleum Refineries and Distributio… 40 C.F.R. Part 63 Subpart Y
MoDNR Mercury Cell Chlor-Alkali Plants (Major and area sources) (5I) - IIIII Major Permit mercury cell, chloralkali process Clean Air Act Standards and Guidelines for the Metals Production Industry 40 C.F.R. Part 63 Subpart IIIII
MoDNR Municipal Solid Waste Landfills (Major and area sources) (4A) - AAAA Major Permit landfill Clean Air Act Guidelines and Standards for Waste Management 40 C.F.R. Part 63 Subpart AAAA Air PBR 106.534: Municipal Solid Waste Landfills and Transfer Stations
EPA Nine Metal Fabrication and Finishing Source Categories (6X) - XXXXXX Exempt metal fabrication Clean Air Act Standards and Guidelines for the Metals Production Industry 40 C.F.R. Part 63 Subpart XXXXXX http://www.epa.gov/ttn/atwfiles/area/metfabb.pdf
MoDNR Oil and Natural Gas Production Facilities (Major and area sources) (2H) - HH Exempt oil and natural gas Clean Air Act Standards and Guidelines for the Oil and Natural Gas Industry 40 C.F.R. Part 63 Subpart HH
EPA Paint Stripping and Miscellaneous Surface Coating Operations (6H) - HHHHHH Exempt paint Clean Air Act Guidelines and Standards for Solvent Use and Surface Coating Indu… 40 C.F.R. Part 63 Subpart HHHHHH About the Collision Repair Campaign
EPA Paints and Allied Products Manufacturing (7C) - CCCCCCC Exempt paint Paints and Allied Products Manufacturing: NESHAP 40 C.F.R. Part 63 Subpart CCCCCCC
EPA Plating and Polishing Operations (6W) - WWWWWW Exempt electroforming, electroplating, electropolishing, non-electrolytic plating, non-electrolytic metal coating Plating and Polishing: NESHAP 40 C.F.R. Part 63 Subpart WWWWWW
EPA Polyvinyl Chloride and Copolymers Production (6D) - DDDDDD Exempt polyvinyl chloride Clean Air Act Standards and Guidelines for Chemical Production and Distribution 40 C.F.R. Part 63 Subpart DDDDDD
MoDNR Portland Cement Regulations (Major and area sources) (3L) - LLL Major Permit cement Clean Air Act Standards and Guidelines for Mineral Processing 40 C.F.R. Part 63 Subpart LLL
EPA Prepared Feeds Manufacturing (7D) - DDDDDDD Exempt animal feed Prepared Feeds Manufacturing: NESHAP 40 C.F.R. Part 63 Subpart DDDDDDD http://www.epa.gov/ttn/atwfiles/area/feedmfgb.pdf
EPA Primary Copper Smelting (6E) - EEEEEE Major Permit copper Clean Air Act Standards and Guidelines for the Metals Production Industry 40 C.F.R. Part 63 Subpart EEEEEE
MoDNR Primary Lead Smelting (3T) - TTT Major Permit lead Clean Air Act Standards and Guidelines for the Metals Production Industry 40 C.F.R. Part 63 Subpart TTT
EPA Primary Nonferrous Metals Area Sources-Zinc, Cadmium and Beryllium (6G) - GGGGGG Major Permit zinc, cadmium, beryllium Primary Nonferrous Metals (Zinc, Cadmium, and Beryllium): NESHAP 40 C.F.R. Part 63 Subpart GGGGGG
MoDNR Printing and Publishing Industry (Some Major sources that can prove actuals below HAP limits) (2K) - KK Major Permit Printing https://www.epa.gov/stationary-sources-air-pollution/clean-air-act-guidelines-a… http://www.ecfr.gov/cgi-bin/text-idx?SID=fecd756decbee94414449e1f49401b7f&node=…