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Table NN-2 to Subpart NN of Part 98—Default Factors for Calculation Methodology 2 of This Subpart

Default Factors for Calculation Methodology 2 of This Subpart

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  11. Appendix Table NN-2 to Subpart NN of Part 98
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Displayed edition2026-04-15
Last updated2026-04-15

Table NN-2 to Subpart NN of Part 98—Default Factors for Calculation Methodology 2 of This Subpart

FuelUnit Default CO2 emission factor

(MT CO2/Unit) 1
Natural GasMscf0.0544
PropaneBarrel0.241
Normal butaneBarrel0.281
EthaneBarrel0.170
IsobutaneBarrel0.270
Pentanes plusBarrel0.324
1 Conditions for emission value presented in MT CO2/bbl are 60 °F and saturation pressure.

[78 FR 71977, Nov. 29, 2013, as amended at 79 FR 3508, Jan. 22, 2014; 81 FR 89270, Dec. 9, 2016]