With EPA handing out multi-million dollar fines, it is more important than ever that facilities avoid making major modifications and increasing air emissions without also installing required air pollution controls.
According to the rules, major modification means any physical change in or change in the method of operation of a major stationary source that would result in:
- A significant emissions increase (defined in 40 CFR 52.21(b)(40)) of a regulated pollutant (defined in 52.21(b)(50)); and
- A significant net emissions increase of that pollutant from the major stationary source.
Examples of major modifications include the addition of new units, changes to current units, changes in operations, or increasing permitted hours or capacity limits.
