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In December 1994, pursuant to section 112(d) of the Clean Air Act, EPA promulgated the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Ethylene Oxide Commercial Sterilization and Fumigation Operations (59 FR 62585). The NESHAP established standards for both major and area sources. EPA completed a residual risk and technology review for the NESHAP in 2006 and, at that time, concluded that no revisions to the standards were necessary. In this action, EPA will conduct the second technology review for the NESHAP, as required by law, and consider potential updates to the rule. To aid in this effort, EPA issued an advance notice of proposed rulemaking that solicited comment from stakeholders, undertook a Small Business Advocacy Review panel, which is needed when there is the potential for significant economic impacts to small businesses from any regulatory actions being considered, and is conducting community outreach as part of the development of this action. For more information, please visit https://www.epa.gov/stationary-sources-air-pollution/ethylene-oxide-emissions-standards-sterilization-facilities.