National Emission Standards for Hazardous Air Pollutants for Chemical Manufacturing Area Sources

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EPA is proposing national emissions standards for hazardous air pollutants for nine area source categories in the chemical manufacturing sector: Agricultural Chemicals and Pesticides Manufacturing, Cyclic Crude and Intermediate Production, Industrial Inorganic Chemical Manufacturing, Industrial Organic Chemical Manufacturing, Inorganic Pigments Manufacturing, Miscellaneous Organic Chemical Manufacturing, Plastic Materials and Resins Manufacturing, Pharmaceutical Production, and Synthetic Rubber Manufacturing. The proposed standards and associated requirements for the nine area source categories are combined in one subpart. The proposed emissions standards for new and existing sources are based on EPA's determination regarding the generally available control technology or management practices for the nine area source categories. EPA is co-proposing an alternative to the requirements for process vents emitting metal hazardous air pollutants. The alternative would set a higher size threshold for large metal hazardous air pollutant process vents.