PSD · Prevention of Significant Deterioration
The permitting path a major new emitting source triggers in an attainment area, requiring best-available control technology and dispersion modeling — a year-plus schedule item.
Current numbers
~60 days-12 months (Region 8 indicative estimates)Indicative EPA Region 8 air-permit review time for combustion bridge power, simple minor source to synthetic-minor/PSD; case-specific