Guidance on PM2.5 and Ozone Significant Impact Levels
EPA Documentation and Technical Justification for the use of the PM2.5 and Ozone Significant Impact Levels.
- EPA Guidance on Significant Impact Levels for Ozone and Fine Particles in the Prevention of Significant Deterioration Permitting Program – April 17, 2018
- Legal Memorandum: Application of Significant Impact Levels in the Air Quality Demonstration for Prevention of Significant Deterioration Permitting under the Clean Air Act
- Technical Basis for the EPA’s Development of the Significant Impact Thresholds for PM2.5 and Ozone
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