The Environmental Protection Commission adopted amendments to Chapter 23, Emission Standards for Contaminants. The amendments remove from the state air quality rules the NESHAPs for industrial, commercial, and institutional boilers and process heaters and the NESHAPs for brick and structural clay products manufacturing because they were recently vacated. http://www.legis.state.ia.us/aspx/ACODOCS/DOCS/03-11-2009.Bulletin.pdf pp. 2022-24.