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Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) Secondary Standards -
Documents from Review Completed in 2012 -
Policy Assessments

Information provided for informational purposes only Note: EPA no longer updates this information, but it may be useful for historical purposes. See the SO2 and NO2 Secondary Standards Home Page for documents from the current review of the SO2 and NO2 Secondary NAAQS.

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File Description File Date File Types
Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Oxides of Sulfur- Main Body Feb 2011 PDF file
10.1 MB
Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Oxides of Sulfur- Appendices Feb 2011 PDF file
9.4 MB
Transmittal Memo of the Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Oxides of Sulfur to CASAC Feb 2011 PDF file
169 kb
Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Oxides of Sulfur: January 14, 2011 Version - Main Body Jan 2011 PDF file
14.3 MB
Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Oxides of Sulfur: January 14, 2011 Version - Appendices Jan 2011 PDF file
7.3 MB
Errata Sheet for Chapter 5 - Policy Assessment for the Review of the Secondary NAAQS for NOx and SOx: Second External Review Draft Sep 2010 PDF file
31 kb
Addendum for Chapter 5 - Policy Assessment for the Review of the Secondary NAAQS for NOx and SOx: Second External Review Draft Sep 2010 PDF file
998 kb
Additional Table 7-1 (summary of key uncertainties) - Policy Assessment for the Review of the Secondary NAAQS for NOx and SOx: Second External Review Draft Sep 2010 PDF file
70 kb
Additional Table for Chapter 9 (summary of options for elements of the NOx and SOx secondary standards) - Policy Assessment for the Review of the Secondary NAAQS for NOx and SOx: Second External Review Draft Sep 2010 PDF file
60 kb
Policy Assessment for the Review of the Secondary NAAQS for NOx and SOx: Second External Review Draft Sep 2010 PDF file
14.4 MB
Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for NOx and SOx: First External Review Draft Mar 2010 PDF file
7.8 MB

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