National Emission Standards for Hazardous Air Pollutants (NESHAP) are stationary source standards for hazardous air pollutants. Hazardous air pollutants (HAPs) are those pollutants that are known or suspected to cause cancer or other serious health effects, such as reproductive effects or birth defects, or adverse environmental effects.
Pesticide production
The intent of these standards is to reduce emissions of hazardous air pollutants (HAP) from existing and new facilities that manufacture organic pesticide active ingredients (PAI) used in herbicides, insecticides, and fungicides. The major HAP emitted by these facilities include toluene, methanol, methyl chloride, and hydrogen chloride (HCl). All of these pollutants can cause reversible or irreversible toxic effects following exposure.
Boilers
On March 21, 2011, EPA issued final emission standards to reduce emissions of toxic air pollutants from industrial, commercial, and institutional boilers located at area source facilities. An area source facility emits or has the potential to emit less than 10 tons per year of any single air toxic or less than 25 tons per year of any combination of air toxics. The final rule covers boilers located at area source facilities that burn coal, oil, or biomass, but not boilers that burn only gaseous fuels or any solid waste. The rule establishes standards to address emissions of mercury, particulate matter (as a surrogate for non-mercury metals), and carbon monoxide (as a surrogate for organic air toxics).