All terms used in this subpart have the same meaning given in the Clean Air Act and subpart A of this part.
Sec. Table NN-1 to Subpart NN of Part 98--Default Factors for
Calculation Methodology 1 of This Subpart ------------------------------------------------------------------------
Default
CO[ihel2]
Default higher emission
Fuel heating value \1\ factor (kg
CO[ihel2]/
MMBtu)------------------------------------------------------------------------Natural Gas....................... 1.026 MMBtu/Mscf.... 53.06Propane........................... 3.84 MMBtu/bbl...... 62.87Normal butane..................... 4.34 MMBtu/bbl...... 64.77Ethane............................ 2.85 MMBtu/bbl...... 59.60Isobutane......................... 4.16 MMBtu/bbl...... 64.94Pentanes plus..................... 4.62 MMBtu/bbl...... 70.02------------------------------------------------------------------------\1\ Conditions for higher heating values presented in MMBtu/bbl are 60
[deg]F and saturation pressure. [78 FR 71977, Nov. 29, 2013] Sec. Table NN-2 to Subpart NN of Part 98--Default Values for Calculation
Methodology 2 of This Subpart ------------------------------------------------------------------------
Default
CO[ihel2]
emission
Fuel Unit value (MT
CO[ihel2]/
Unit) \1\------------------------------------------------------------------------Natural Gas........................ Mscf.................. 0.0544Propane............................ Barrel................ 0.241Normal butane...................... Barrel................ 0.281Ethane............................. Barrel................ 0.170Isobutane.......................... Barrel................ 0.270Pentanes plus...................... Barrel................ 0.324------------------------------------------------------------------------\1\ Conditions for emission value presented in MT CO[ihel2]/bbl are 60
[deg]F and saturation pressure. [78 FR 71977, Nov. 29, 2013, as amended at 79 FR 3508, Jan. 22, 2014]
Subpart OO_Suppliers of Industrial Greenhouse Gases