[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR94.305]

[Page 632-633]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 94--CONTROL OF EMISSIONS FROM MARINE COMPRESSION-IGNITION ENGINES--
Table of Contents
 
   Subpart D Certification Averaging, Banking, and Trading Provisions
 
Sec. 94.305  Credit generation and use calculation.

    (a) For each participating engine family, calculate 
THC+NOX and PM emission credits (positive or negative) 
according to the equation in paragraph (b) of this section and round 
emissions to the nearest one-hundredth of a megagram (Mg). Use 
consistent units throughout the calculation.
    (b) Credits (Mg) for each engine family are calculated as: Emission 
credits = (Std--FEL)x(UL)x(Production)x(AvgPR)x(LF)x(10-6)

Where:

    (i) Std = the applicable cycle-weighted marine engine 
THC+NOX or PM emission standard in grams per kilowatt-hour.
    (ii) FEL = the family emission limit for the engine family in grams 
per kilowatt-hour. (The FEL may not exceed the limit established in 
Sec. 94.304(m) for each pollutant.)
    (iii) UL = the useful life in hours of operation.
    (iv) Production = the number of engines participating in the 
averaging, banking, and trading program within the given engine family 
during the calendar year (or the number of engines in

[[Page 633]]

the subset of the engine family for which credits are being calculated). 
Quarterly production projections are used for initial certification. 
Actual applicable production/sales volumes are used for end-of-year 
compliance determination.
    (v) AvgPR = average power rating of all of the configurations within 
an engine family, calculated on a sales-weighted basis, in kilowatts.
    (vi) LF = the load factor, dependent on whether the engine is 
intended for propulsion or auxiliary applications, as follows:
    (A) 0.69 for propulsion engines,
    (B) 0.51 for auxiliary engines.

[64 FR 73331, Dec. 29, 1999, as amended at 68 FR 9786, Feb. 28, 2003]