The flow charts available on this page are provided as a guide to help determine what permitting action, if any, is necessary for different types of changes that may occur at a facility that is operating under a Title V (Part 70) permit. If there is uncertainty what course to take regarding changes at your facility contact the Air Branch's Stationary Source Permitting Program.
The flow charts are available only as PDF documents. The first flow chart helps determine if a permit modification is necessary. If a permit modification is necessary, the second flow chart aids in deciding the type of permit modification.
Is a permit modification necessary? -
A modification is necessary. What type? -
Type of Change, Procedures & Example Letters
- Minor Modifications
- Significant Modifications
- Off-Permit Change
- PSD/NSR Modifications
- 502(b)(10) Change
- Administrative Amendment