Ill. Admin. Code tit. 35, pt. 270

Clean Air Act Permit Program Procedures

AUTHORITY: Implementing and authorized by Section 39.5 of the Environmental Protection Act (See P.A. 87-1213, effective September 26, 1992, and P.A. 88-464, effective August 20, 1993) [415 ILCS 5/39.5]. SOURCE: Adopted at 18 Ill. Reg. 9425, effective June 14, 1994; emergency amendment at 19 Ill. Reg. 7976, effective June 7, 1995, for a maximum of 150 days; emergency expired November 6, 1995; amended at 43 Ill. Reg. 9963, effective August 27, 2019; amended at 49 Ill. Reg. 12946, effective September 29, 2025; amended at 50 Ill. Reg. 2509, effective February 9, 2026.ENVIRONMENTAL PROTECTION AGENCY

270.101Purpose 270.102Definitions 270.103Existing CAAPP Source 270.104Initial CAAPP Application 270.105New CAAPP Source 270.106Standard Industrial Classification (SIC) Code 270.107Applicability 270.108Incorporation by Reference 270.201Schedule for Submission of Initial CAAPP Applications for Existing CAAPP Sources 270.202Transition from the State Operating Permit Program 270.301Application Submittal 270.302Application Submittal for Modifications of CAAPP Permits 270.303Agency Determination of Completeness 270.304Effect of a Timely and Complete Application Submittal 270.305Subsequent Agency Request for Information 270.306Submittal of New or Revised Information 270.307Agency Action on CAAPP Applications 270.308Requests for Exclusion from the CAAPP Due to Permanent Physical Constraints 270.401General Application Information 270.402General Source Information 270.403Information for Individual Emission Units 270.404Compliance Plan/Schedule of Compliance 270.405Compliance Certification 270.406Operational Flexibility 270.407Startup (Repealed)270.408Malfunction or Breakdown (Repealed)270.409Confidential Information 270.410Permit Shield 270.411Accidental Releases 270.412MACT Determination 270.413Acid Rain 270.501Applicability 270.502Purpose 270.503Reopenings Initiated by the Agency 270.504Reopenings Initiated by USEPA 270.601Purpose 270.602Definitions 270.603Amount of Fee 270.604Billing Procedures 270.605Payment Procedures 270.606Refund and Underpayment of Fees 270.607Requests for Reconsideration of Fee Amount 270.608Agency Response to Requests for Reconsideration 270.609Appeal of Agency Response