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Air Quality

Greenhouse Gas Emissions

EPA Tailoring Rule

DHEC has developed this webpage to assist you with implementation of this EPA rule. Besides providing basic GHG permitting guidance, this site will provide sample calculations, links to information about GHGs, contact information, and future updates. This site will continue to grow as more guidance is developed.

Greenhouse Gas (GHG) Permitting Requirements for Title V facilities

Construction Permitting at Title V Facilities

  • Starting in 2011, all construction permit applications will need to include facility-wide and unit specific potential greenhouse gas emission calculations, similar to what information is submitted for other regulated pollutants.
  • Permits can contain federally enforceable limits (public notice required) for facilities wishing to limit their GHG potential emissions.
  • From January 02, 2011, to June 30, 2011(known as Phase I), no new permitting actions [prevention of significant deterioration (PSD)] will be required solely due to GHG emissions. However, sources undertaking PSD permitting for other pollutants will need to determine if their project triggers best available control technology (BACT) for GHGs.
  • A current or pending PSD project proposing to increase potential GHG emissions by 75,000 tons per year (tpy) carbon dioxide equivalents (CO2e) or more would need to submit a GHG (BACT) analysis.
  • From July 1, 2011 (known as Phase II), the PSD permitting requirements will cover for the first time new construction projects that have the potential to emit GHG emissions of at least 100,000 tpy - even if they do not exceed the permitting thresholds for any other pollutant. Modifications at existing PSD major facilities that increase potential GHG emissions by at least 75,000 tpy will be subject to permitting requirements even if they do not significantly increase emissions of any other pollutant.
  • As part of Phase II requirements please be aware that facilities who were issued non PSD construction permits and whose potential to emit GHG emissions is at least 100,000 tpy (or 75,000 tpy for modifications to existing PSD major sources) may require a PSD permit prior to construction if actual construction has not begun by July 1, 2011. DHEC defines "begin actual construction" in our PSD regulation (SC Regulation 61-62.5, Standard No. 7). Permits containing federally enforceable synthetic minor GHG limits may construct after that date without obtaining a PSD permit.

Title V Permitting:

  • Starting January 02, 2011, existing Title V facilities will be required to address GHGs as part of the Title V permitting process. If you have a new or renewal Title V application being currently processed, GHG emissions must be quantified and submitted prior to permit issuance in accordance with the Title V forms. There may be certain circumstances in which GHGs may be requested at a Title V modification, otherwise GHGs should be addressed at the next Title V renewal or when a new Title V is submitted. Federally enforceable limits may be issued at renewal or major modification without a construction permit.

Greenhouse Gas (GHG) Construction Permitting at Conditional Major
and Minor Source Facilities

  • Starting in 2011, all construction permit applications will need to include facility-wide and unit specific potential greenhouse gas emission calculations, similar to what information is submitted for other regulated pollutants.
  • Permits can contain federally enforceable limits (public notice required) for facilities wishing to limit their GHG potential emissions.
  • From January 2, 2011, to June 30, 2011 (known as Phase I), no new Prevention of Significant Deterioration (PSD) permitting actions will be required solely due to GHG emissions. However, sources undertaking PSD permitting for other pollutants will need to determine if their project triggers best available control technology (BACT) for GHGs. A current or pending PSD project proposing to increase potential GHG emissions by 75,000 tons per year (tpy) carbon dioxide equivalents (CO2e) or more would need to submit a GHG BACT analysis.
  • From July 1, 2011 (known as Phase II), the PSD permitting requirements will cover for the first time new construction projects that have the potential to emit GHG emissions of at least 100,000 tpy - even if they do not exceed the permitting thresholds for any other pollutant. Modifications at existing PSD major facilities that increase potential GHG emissions by at least 75,000 tpy will be subject to permitting requirements even if they do not significantly increase emissions of any other pollutant.
  • As part of Phase II requirements please be aware that facilities who were issued non PSD construction permits and whose potential to emit GHG emissions is at least 100,000 tpy (or 75,000 tpy for modifications to existing PSD major sources) may require a PSD permit prior to construction if actual construction has not begun by July 1, 2011. DHEC defines "begin actual construction" in our PSD regulation (SC Regulation 61-62.5, Standard No. 7). Permits containing federally enforceable synthetic minor GHG limits may construct after that date without obtaining a PSD permit.

Operating Permit Guidelines

  • Starting July 1, 2011, any facility with the potential to emit at least 100,000 tpy of CO2e emissions plant-wide will be considered a major source and will have one year to apply for a Title V operating permit. A complete Title V application must be submitted by July 1, 2012.
  • The facility has the option to request federally enforceable synthetic minor GHG limits to remain a minor source. The facility must request and receive an issued permit prior to July 1, 2012.
  • Both the Title V and the synthetic minor permitting processes will include a 30 day public comment period.
  • Existing Conditional Major and Minor Source facilities will be required to address GHGs as part of the operating permitting process.
  • If you have a new or renewal operating permit application being currently processed, GHG emissions must be quantified and submitted prior to permit issuance in accordance with the appropriate forms (available on our website).
  • There may be certain circumstances in which GHGs may be requested at a permit modification, otherwise GHGs should be addressed at the next operating permit renewal or when a new operating permit application is submitted. Federally enforceable limits may be issued at Conditional Major renewal without a construction permit.

For more information please contact the Bureau of Air Quality at (803) 898-4123 or by email.