Natural Gas Fired Boiler

The BACT Requirement applies to new sources, or modifications of existing sources, which emit the following NSR pollutants:

• Pollutants with a National Ambient Air Quality Standards (NAAQS), also known as criteria pollutants, which include:
  • Ozone
  • Carbon Monoxide
  • Particulate Matter
  • Sulfur Dioxide
  • Lead
  • Nitrogen Oxide
• Other pollutants including sulfuric acid mist, hydrogen sulfide, etc.
• Note that some states, such as Connecticut require BACT for ANY pollutant

The federal regulations require that “Major Sources” and “Major Modifications to existing sources” perform a BACT Analysis. However, some states have more stringent requirements. The following are a few examples:

• Connecticut
  • Potential emissions greater than the threshold for major sources and major modifications
  • Potential emissions greater than 15-tons per year from ANY new emission unit or modification to existing emission units (not just major sources)
• South Carolina
  • Any new construction when the net VOC emissions increase is greater than 100-tons per year

For your state’s specific BACT requirements, you should check with your local regulator (City, County, State).