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 Coke Oven Batteries (1L) - L Major Permit coke ovens Coke Ovens Batteries: NESHAP 40 C.F.R. Part 63 Subpart L
EPA Electric Arc Furnaces Steelmaking Facilities (5Y) - YYYYY Major Permit steel Electric Arc Furnace Steelmaking Facilities: NESHAP 40 C.F.R. Part 63 Subpart YYYYY
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
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 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
EPA Glass Manufacturing Industry (6S) - SSSSSS Major Permit glass Glass Manufacturing Area Sources: NESHAP 40 C.F.R. Part 63 Subpart SSSSSS
EPA Gold Mine Ore Processing and Production (7E) - EEEEEEE Major Permit gold mine Gold Mine Ore Processing and Production: NESHAP 40 C.F.R. Part 63 Subpart EEEEEEE
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 Chemical Manufacturing Area Sources (6V) VVVVVV Maybe agricultural chemicals , pesticide, cyclic crude, industrial inorganic chemical, industrial organic chemical, inorganic pigments, organic chemicals, pharmaceutical, plastics, resins, synthetic rubber Chemical Manufacturing Area Sources: NESHAP 40 C.F.R. Part 63 Subpart VVVVVV