🏭

Potential to Emit (PTE) Calculator

Clean Air Act Title V & PSD Applicability

Professional PTE Calculator
Calculates potential to emit (PTE) for combustion equipment using EPA AP-42 emission factors. Determines Title V major source status and PSD applicability based on annual emissions.

Equipment Type

Uncontrolled 4-stroke rich-burn engine. Common for compressor drivers.

Equipment Rating

Operating Hours

hrs/yr

PTE assumes maximum operational capacity. 8,760 = 24/7 operation.

Emission Controls

Location

Nonattainment areas have lower major source thresholds for NSR applicability.

Major Source Thresholds

Title V (40 CFR 70):
  • 100 tpy any criteria pollutant
  • 10 tpy single HAP
  • 25 tpy combined HAPs
PSD (Attainment):
  • 250 tpy (most sources)
  • 100 tpy (28 listed categories)
NSR (Nonattainment):
  • Marginal: 100 tpy
  • Moderate: 100 tpy
  • Serious: 50 tpy
  • Severe: 25 tpy
  • Extreme: 10 tpy

Limitations & Assumptions

  • Uses EPA AP-42 Chapter 3.2 emission factors (July 2000)
  • PTE assumes maximum design capacity and continuous operation unless limited
  • Control efficiencies are typical values - actual may vary by manufacturer
  • Does not include fugitive emissions, tanks, or other ancillary sources
  • Consult state/local agencies for specific permitting requirements

Standards & References

  • EPA AP-42
    Compilation of Air Pollutant Emission Factors, Chapter 3.2
  • 40 CFR Part 70
    Title V Operating Permits
  • 40 CFR Part 51/52
    Prevention of Significant Deterioration (PSD)
  • 40 CFR Part 63
    NESHAP for Stationary RICE

Frequently Asked Questions

What is potential to emit (PTE)?

Potential to emit is the maximum capacity of a source to emit a pollutant under its physical and operational design, used to determine Title V and PSD permit applicability.

What equipment types does this PTE calculator support?

This calculator supports engines, turbines, and heaters for determining NOx, CO, VOC, and HAP emissions.

Why is PTE important for air permitting?

PTE determines whether a facility triggers Title V or PSD permitting requirements by comparing maximum possible emissions against EPA regulatory thresholds.