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The IDNR is accepting public comments until May 8 concerning proposed rule changes to rescind outdated and obsolete rules, and to adopt federal National Emissions Standards for Hazardous Air Pollutants and New Source Performance Standards. The proposed changes will affect several air quality regulations including construction permitting, Title V permitting, Prevention of Significant Deterioration, and testing and monitoring methods. Provide comments and suggestions to Christine Paulson at, or by mail to DNR Air Quality Bureau, 7900 Hickman Road, Suite 1, Windsor Heights, Iowa 50324.