AP 42, Fifth Edition, Volume I Chapter 1: External Combustion Sources

 1.1 Bituminous and Subbituminous Coal Combustion

• AP-42 1.1 Final Section - Supplement E, September 1998 (pdf) (281.18 KB)  
• AP-42 1.1 Background Document (pdf) (1.04 MB)  

 1.2 Anthracite Coal Combustion

• AP-42 1.2 Final Section - Supplement B, October 1996 (pdf) (50.43 KB)  
• AP-42 1.2 Background Document (pdf) (186.17 KB)  

 1.3 Fuel Oil Combustion

• AP-42 1.3 Final Section - Supplement E September 1999, corrected May 2010 (pdf) (514.58 KB)  
• AP-42 1.3 Background Document - September 1998 (pdf) (856.18 KB)  
• Related Information - The data that supports the emissions factors are presented in summary in the background report and are reported more completely in a database. The database is a zipped spreadsheet. (zip) . 

 1.4 Natural Gas Combustion

• AP-42 1.4 Final Section - Supplement D, July 1998 (pdf) (186.07 KB)  
• AP-42 1.4 Background Document (pdf) (160.02 KB)
• Related Information - The data that supports the emissions factors are presented in summary in the background report and are reported more completely in a database. The database is a zipped MS Access file (zip) . 

 1.5 Liquified Petroleum Gas Combustion

• AP-42 1.5 Final Section - Updated, July 2008 (pdf) (29.72 KB)
• AP-42 1.5 Background Document (pdf) (87.65 KB)

 1.6 Wood Residue Combustion in Boilers

• AP-42 1.6 Final Section - Updated April 2022 (pdf) (388.54 KB)
• AP-42 1.6 Background Document (pdf) (73.61 KB)
• Related Information - The data that supports the emission factors are presented in summary in the background report and are reported more completely in a database. The database is a zipped spreadsheet - Wood Residue Combustion (zip)  (457 KB). This information was updated April 11, 2008, to include process information. None of the emissions factors were changed.
  • Update - March 2022

 1.7 Lignite Combustion

• AP-42 1.7 Final Section - Supplement E, September 1998 (pdf) (125.73 KB)  
• AP-42 1.7 Background Document (pdf) (570.41 KB)  

 1.8 Bagasse Combustion in Sugar Mills

• AP-42 1.8 Final Section - Supplement B, October 1996 (pdf) (26.52 KB)  
• AP-42 1.8 Background Document (pdf) (155.33 KB)

 
1.9 Residential Fireplaces

• AP-42 1.9 Final Section - Supplement B, October 1996 (pdf) (24.2 KB)  
• AP-42 1.9 Background Document (pdf) (73.81 KB)
• Related Information -  Residential Wood Stove Technology Review, Volume I, December 1998 (pdf) (110.14 KB)  and Residential Wood Stove Technology Review, Volume I, December 1998 Appendices (pdf) (356.63 KB)

 1.10 Residential Wood Stoves

• AP-42 1.10 Final Section - Supplement B, October 1996 (pdf) (36.18 KB)  
• AP-42 1.10 Background Document (pdf) (150.26 KB)
• Related Information -  Residential Wood Stove Technology Review, Volume I, December 1998 (pdf) (110.14 KB)  and Residential Wood Stove Technology Review, Volume I, December 1998 Appendices (pdf) (356.63 KB)

1.11 Waste Oil Combustion

• AP-42 1.11 Final Section - Supplement B, October 1996 (pdf) (32.28 KB)  
• AP-42 1.11 Background Document (pdf) (95.86 KB)

Frequent Questions

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