StacksVerified U.S. regulatory reference

40 CFR Part 98, Table W-7

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
Internal combustionequipment typeEmissionfactor(kg CH4/mmBtu)
Reciprocating Engine, 2-stroke lean-burn0.658
Reciprocating Engine, 4-stroke lean-burn0.522
Reciprocating Engine, 4-stroke rich-burn0.045
Gas Turbine0.004

[89 FR 42327, May 14, 2024]