The following symbols, acronyms, and abbreviations apply to this part:

ABT   Averaging, banking, and trading.

cc   cubic centimeters.

CFR   Code of Federal Regulations.

CH4   methane.

CO   carbon monoxide.

CO2   carbon dioxide.

EPA   Environmental Protection Agency.

FEL   Family Emission Limit.

g   gram.

HC   hydrocarbon.

hr   hour.

kPa   kilopascals.

kW   kilowatts.

N2O   nitrous oxide.

NMHC   nonmethane hydrocarbons.

NOX   oxides of nitrogen (NO and NO2).

psig   pounds per square inch of gauge pressure.

RPM   revolutions per minute.

THC   total hydrocarbon.

THCE   total hydrocarbon equivalent.

U.S.C.   United States Code.