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AP 42, Fifth Edition, Volume I
Chapter 12: Metallurgical Industry

 
  Chapter 12: Frequent Questions
 
12.0 Introduction to Metallurgical Industry
 
12.1 Primary Aluminum Production
 
  • Final Section - October 1998 (PDF 100K)
  • Errata
    In Table 12.1-2 the number under Prebake Aluminum Cells, Cumulative Emission Factor, Total was corrected to be 5.0 and not 2.5. Also the emissions factors and size distributions in the second and third columns for Prebake Aluminum Cells and HSS Aluminum Cells are fugitive emissions measured at the roof monitor. The emission factor and size distributions in the fourth column for HSS Reduction Cells is for primary emissions. In Table 12.1-3, the Source Classification Codes were added to the table.
  • Background Document (PDF 155K)
 
12.2 Coke Production
 
 
12.3 Primary Copper Smelting
 
 
12.4 Ferroalloy Production
 
 
12.5 Iron and Steel Production
 
12.5.1 Minimills
 
  • Draft Section - October 2008 (PDF 255K)
  • Draft Background Document - October 2008 (PDF 375K)
    Comments on the section are due to the Info CHIEF Help Desk (info.chief@epa.gov) in the Measurement Policy Group by December 4, 2008.

    The most significant changes to the emissions factors since the last revision were to the filterable and condensable PM emission factors and the VOC emission factors. These changes are due to the addition of new test data.

  • Final Section - December 20, 2006 (PDF 50K)
  • Errata - January 16, 2007. The section was corrected to include the beryllium emission factors, which were inadvertently left out during the document conversion.
  • Background Document (PDF 130K)
 
12.6 Primary Lead Smelting
 
 
12.7 Zinc Smelting
 
 
12.8 Secondary Aluminum Operations
 
 
12.9 Secondary Copper Smelting and Alloying
 
 
12.10 Gray Iron Foundries
 
 
12.11 Secondary Lead Processing
 
 
12.12 Secondary Magnesium Smelting
 
 
12.13 Steel Foundries
 
 
12.14 Secondary Zinc Processing
 
 
12.15 Storage Battery Production
 
 
12.16 Lead Oxide and Pigment Production
 
 
12.17 Miscellaneous Lead Products
 
 
12.18 Leadbearing Ore Crushing and Grinding
 
 
12.19 Electric Arc Welding
 
 
12.20 Electroplating
 
  • Final Section - Supplement B, July 1996 (PDF 221K)
  • Errata - April 19, 2006
    Footnote "a" to Table 12.20-2 in the Electroplating AP-42 section was revised to reflect the correct conversion from grains/hr-ft^2 to mg/hr-m^2. The corrected conversion factor of 697 replaces the value of 0.7 that was in the footnote.
  • Background Document (PDF 612K)
 
Related Emission Factor Documents
 
Emission of Fume, Nitrogen Oxides and Noise in Plasma Cutting of Stainless and Mild Steel
 
  • Main Document - by Broman B. et al, The Swedish Institute of Production Engineering Research. SELECTED PAGES ONLY., March 1994 (PDF 695K)

AP 42 Emissions Factors by Chapter

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