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Table W-7 to Subpart W of Part 98—Default Methane Emission Factors for Internal Combustion Equipment

Default Methane Emission Factors for Internal Combustion Equipment

  1. CFR
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  3. Title 40
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  5. Chapter I
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  7. Part 98
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  9. Subpart W
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  11. Appendix Table W-7 to Subpart W of Part 98
CorpusDaily eCFR
Displayed edition2026-04-15
Last updated2026-04-15

Table W-7 to Subpart W of Part 98—Default Methane Emission Factors for Internal Combustion Equipment

Internal combustion

equipment type		Emission

factor

(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]