The following symbols, acronyms, and abbreviations apply to this part: [deg] degree.ASTM American Society for Testing and Materials.C Celsius.CFR Code of Federal Regulations.EPA Environmental Protection Agency.FEL family emission limit.g gram.gal gallon.hr hour.in inch.kPa kilopascal.kW kilowatt.L liter.m meter.min minute.mm millimeter. psig pounds per square inch of gauge pressure.SAE Society of Automotive Engineers.SHED Sealed Housing for Evaporative Determination.U.S. United States.U.S.C. United States Code.W watt.