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Air Dispersion Modeling: Who Needs to Use It?

An air dispersion model is a set of mathematical equations that relates the release of air pollutants from emission sources to the corresponding concentration of pollutants in the ambient air. These models are tools used to determine if the emissions from a source can meet a specific ambient standard.

Regulations may allow other approaches, but air dispersion modeling is typically the least expensive and least time consuming approach.
The emission sources/facilities can use air dispersion modeling to show compliance with federal and/or state air pollution control laws and regulations, such as:

  • South Carolina Air Pollution Control Regulation 62.5, Standards no. 2, 7, and 8.
  • Prevention of Significant Deterioration (PSD)
  • Construction permits
  • Title V
  • Conditional major
  • State operating permit renewals.