The provisions of this section apply separately for calculating emission credits for NOX, NOX + NMHC, or PM.
Emission credits (kg) = (Std-FEL) ·Volume·AvgPR·UL· 10-3
Eq. 1039.705-1
Where:
Std = the emission standard, in grams per kilowatt-hour, that applies under subpart B of this part for engines not participating in the ABT program of this subpart (the "otherwise applicable standard").
FEL = the family emission limit for the engine family, in grams per kilowatt-hour.
Volume = the number of engines eligible to participate in the averaging, banking, and trading program within the given engine family during the model year, as described in paragraph (c) of this section.
AvgPR = the average value of maximum engine power values for the engine configurations within an engine family, calculated on a sales-weighted basis, in kilowatts.
UL = the useful life for the given engine family, in hours.
40 C.F.R. §1039.705