AUTHORITY: Implementing Sections 9.1 and 10 and authorized by Sections 27 and 28 of the Environmental Protection Act [415 ILCS 5/9.1, 10, 27 and 28].POLLUTION CONTROL BOARD
"Significant emissions increase" means, for a regulated NSR pollutant, an increase in emissions that is significant (as defined in Section 204.660) for that pollutant.