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  2. New Source Review (NSR) Permitting

Relevant Guidance Index

New Source Review Applicability 

Stationary Source
  • Stationary Source of Air Pollution
  • Single Source Determinations
Construction
  • Begin Actual Construction
  • Commence Construction
 Major Stationary Source
  • Regulated NSR Pollutants & Associated Calculations
  • Categories with 100 TPY Major Source Threshold
  • Temporary Emissions
  • Limiting Potential to Emit
  • Fugitive Emissions
  • Excess Emissions During Periods of Startup, Shutdown, or Malfunction
  • Secondary Emissions
  • Reactivation of a Shutdown Source/Emissions Unit
  • Plantwide Applicability Limits (PALs)
Major Modifications
  • Physical Change or Change in the Method of Operation
  • Alternative Fuels Exclusion
  • Routine Maintenance, Repair and Replacement
  • Replacement Units (Under the 2003 Rule)
  • Major Modification Applicability Test
    • STEP 1: Emissions Increase Calculation (Project Emissions Increase)
      • Project Aggregation
      • Debottlenecked Sources
    • STEP 2: Emissions Netting (Contemporaneous Netting)

Best Available Control Technology (BACT) 

BACT Procedure
BACT Applicability
BACT Cost Considerations

Ambient Air Modeling & Monitoring 

Prevention of Significant Deterioration (PSD) Increments
Significant Impact Levels (SILs) & Cumulative Analyses
Air Quality Monitoring & Modeling
Definition/Interpretations of Ambient Air

Class I Areas 

Class I Areas
Visibility Assessment & Air Quality Related Values (AQRVs)

Nonattainment New Source Review 

Nonattainment New Source Review Applicability Determinations
Lowest Achievable Emissions Rate (LAER)
Emissions Offsets

Post-Issuance Permit Activities 

Relaxation of Emissions Limits
Permit Revisions & Rescissions
Permit Extensions

Implementation of New Source Review (NSR) Program 

Processing of State Implementation Plans (SIPs) and Permits
Enforcement Issues & Implementation of Permitting Program

New Source Review (NSR) Permitting

  • Learn About NSR
  • Regulatory Actions
  • Guidance
  • Participate
  • GHG Permitting
  • Related Links
Contact Us About the New Source Review (NSR) Permitting
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 2, 2025
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