US EPA to Reconsider Issues Related to Risks Posed by Ethylene Oxide Emissions for Certain Types of Chemical Manufacturing

The U.S. Environmental Protection Agency (EPA) is proposing to reconsider the August 2020 National Emission Standards for Hazardous Air Pollutants (NESHAP) for chemical plants that fall under the Miscellaneous Organic Chemical Manufacturing source category (“2020 MON final rule”). EPA is proposing to continue to rely on the agency’s 2016 peer-reviewed value to represent the toxicity of ethylene oxide when assessing risk from the manufacture of miscellaneous specialty organic chemicals in the 2020 MON final rule. EPA’s peer-reviewed value showed that ethylene oxide was significantly more toxic than previously understood.

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