| Combustion turbine type
| Combustion
turbine
heat input at
peak load
(HHV)
| NOX emission standard
|
|---|
| New turbine firing natural gas, electric generating | ≤50 MMBtu/h | 42 ppm at 15 percent O2 or 290 ng/J of useful output (2.3 lb/MWh).
|
| New turbine firing natural gas, mechanical drive | ≤50 MMBtu/h | 100 ppm at 15 percent O2 or 690 ng/J of useful output (5.5 lb/MWh).
|
| New turbine firing natural gas | >50 MMBtu/h and ≤850 MMBtu/h | 25 ppm at 15 percent O2 or 150 ng/J of useful output (1.2 lb/MWh).
|
| New, modified, or reconstructed turbine firing natural gas | >850 MMBtu/h | 15 ppm at 15 percent O2 or 54 ng/J of useful output (0.43 lb/MWh).
|
| New turbine firing fuels other than natural gas, electric generating | ≤50 MMBtu/h | 96 ppm at 15 percent O2 or 700 ng/J of useful output (5.5 lb/MWh).
|
| New turbine firing fuels other than natural gas, mechanical drive | ≤50 MMBtu/h | 150 ppm at 15 percent O2 or 1,100 ng/J of useful output (8.7 lb/MWh).
|
| New turbine firing fuels other than natural gas | >50 MMBtu/h and ≤850 MMBtu/h | 74 ppm at 15 percent O2 or 460 ng/J of useful output (3.6 lb/MWh).
|
| New, modified, or reconstructed turbine firing fuels other than natural gas | >850 MMBtu/h | 42 ppm at 15 percent O2 or 160 ng/J of useful output (1.3 lb/MWh).
|
| Modified or reconstructed turbine | ≤50 MMBtu/h | 150 ppm at 15 percent O2 or 1,100 ng/J of useful output (8.7 lb/MWh).
|
| Modified or reconstructed turbine firing natural gas | >50 MMBtu/h and ≤850 MMBtu/h | 42 ppm at 15 percent O2 or 250 ng/J of useful output (2.0 lb/MWh).
|
| Modified or reconstructed turbine firing fuels other than natural gas | >50 MMBtu/h and ≤850 MMBtu/h | 96 ppm at 15 percent O2 or 590 ng/J of useful output (4.7 lb/MWh).
|
| Turbines located north of the Arctic Circle (latitude 66.5 degrees north); turbines operating at less than 75 percent of peak load; modified and reconstructed offshore turbines; and turbines operating at temperatures less than 0 °F | ≤30 MW output | 150 ppm at 15 percent O2 or 1,100 ng/J of useful output (8.7 lb/MWh).
|
| Turbines located north of the Arctic Circle (latitude 66.5 degrees north); turbines operating at less than 75 percent of peak load; modified and reconstructed offshore turbines; and turbines operating at temperatures less than 0 °F | >30 MW output | 96 ppm at 15 percent O2 or 590 ng/J of useful output (4.7 lb/MWh).
|
| Heat recovery units operating independent of the combustion turbine | All sizes | 54 ppm at 15 percent O2 or 110 ng/J of useful output (0.86 lb/MWh).
|
| Combustion turbines bypassing the heat recovery unit firing natural gas | >50 MMBtu/h | 25 ppm at 15 percent O2 or 150 ng/J of useful output (1.2 lb/MWh).
|
| Temporary turbine firing natural gas | ≤850 MMBtu/h | 25 ppm at 15 percent O2 or 150 ng/J of useful output (1.2 lb/MWh).
|
| Temporary turbine firing fuels other than natural gas | ≤850 MMBtu/h | 74 ppm at 15 percent O2 or 460 ng/J of useful output (3.6 lb/MWh). |