Under the approach announced by EPA on February 27, 2012, that it would not be lowering the thresholds for greenhouse gas (GHG) permitting. The agency stated that new facilities with GHG emissions of at least 100,000 tons per year (tpy) carbon dioxide equivalent (CO2e) continue to be required to obtain PSD permits. Existing facilities that emit 100,000 tpy of CO2e and make changes increasing the GHG emissions by at least 75,000 tpy CO2e, must also obtain PSD permits. Facilities that must obtain a PSD permit, to include other regulated pollutants, must also address GHG emission increases of 75,000 tpy or more of CO2e. New and existing sources with GHG emissions above 100,000 tpy CO2e must also obtain operating permits.
EPA had previously discussed lowering the level at which GHG emissions would cause facilities to be regulated.