Regulations last checked for updates: Feb 03, 2026

Title 40 - Protection of Environment last revised: Dec 31, 2026
All TitlesTitle 40Chapter IPart 60Subpart KKKKaAppendix - Table 2 to Subpart KKKKa of Part 60—Alternative Mass-Based NOX Emission Standards for Stationary Combustion Turbines
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Appendix - Table 2 to Subpart KKKKa of Part 60—Alternative Mass-Based NOX Emission Standards for Stationary Combustion Turbines
Combustion turbine type 4-Hour emissions rate
(lb NOX/MW-rated output) 		12-Calendar-month emissions rate
(ton NOX/MW-rated output)
Natural Gas0.38 kg NOX/MW-rated output (0.83 lb NOX/MW-rated output)0.44 tonne NOX/MW-rated output (0.48 ton NOX/MW-rated output).
Non-Natural Gas0.82 kg NOX/MW-rated output (1.8 lb NOX/MW-rated output)0.74 tonne NOX/MW-rated output (0.81 ton NOX/MW-rated output).
authority: 42 U.S.C. 7401
source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.
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