The Environmental Protection Commission adopted amendments to Iowa Admin. Code r. 20, Scope of Title-Definitions-Forms-Rules of Practice; r. 22, Controlling Pollution; r. 23, Emission Standards for Contaminants; r. 25, Measurement of Emissions; r. 28, Ambient Air Quality Standards; and r. 33, Special Regulations and Construction Permit Requirements for Major Stationary Sources-Prevention of Significant Deterioration of Air Quality. The amendments are intended to update state air quality rules by adopting new federal requirements, including adoption of new NAAQS and two new federal air toxics standards. The amendments would also revise construction permitting requirements and stack testing requirements. http://www.legis.state.ia.us/aspx/ACODOCS/DOCS/10-07-2009.Bulletin.pdf pp.1049-53.