Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) Secondary Air Quality Standards - Documents from Review Completed in 2012
Federal Register Notices
-Rulemaking Notices / Public Hearings
- Review of Secondary NAAQS for Oxides of Nitrogen and Sulfur, Final Decision - April 3, 2012
- Extension of Public Comment Period on the Proposed Revisions to the Secondary NAAQS for Oxides of Nitrogen and Sulfure - Sept 27, 2011
- Announcement of Public Hearing on Proposed Revisions to Secondary NAAQS for Oxides of Nitrogen and Sulfur - Aug 8, 2011
- Proposed Revisions to Secondary NAAQS for Oxides of Nitrogen and Sulfur - Aug 1, 2011
-Pre-Rulemaking Documents / Availability and Opportunities for Public Comment
- Notification of Availability for Policy Assessment for the Review of the Secondary NAAQS for Oxides of Nitrogen and Sulfur - Jan 26, 2011
- Notice of Availability and Public Comment Period for Policy Assessment for the Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur: Second External Review Draft - Sept 21, 2010
- Notice of Extension of Public Comment Period - First Draft Policy Assessment - April 20, 2010
- Notice of Availability and Public Comment Period for Policy Assessment for the Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur: First External Review Draft - March 12, 2010
- Notice of Extension of Public Comment Periods for Second External Review Draft Integrated Science Assessment and First External Review Draft Risk and Exposure Assessment - Sept 29, 2008
- Notice of Availability: Risk and Exposure Assessment to Support the Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur, First Draft - Aug 29, 2008
- Notice of Public Comment Period for First External Review Draft Integrated Science Assessment for Oxides of Nitrogen and Sulfur, Environmental Criteria - Dec 21, 2007
- Integrated Science Assessment for SOx: Call for Information - May 15, 2006
- Integrated Science Assessment for NOx: Call for Information - Dec 09, 2005
-Public Meetings / Workshops
- CASAC Teleconference on Policy Assessment (May 12, 2011) - March 25, 2011
- CASAC Meeting on Policy Assessment (Feb 15-16, 2011) - Jan 24, 2011
- CASAC Meetings on draft Policy Assessment (Nov 9-10, 2010, Dec 6, 2010) - Oct 25, 2010
- CASAC Meeting on draft Policy Assessment (Oct 6-7, 2010) - Sept 9, 2010
- CASAC Meetings on draft Policy Assessment (Apr 1-2, 2010, May 3, 2010) - Mar 8, 2010
- CASAC Meetings on draft Risk/Exposure Assessment (July 22-23, 2009, Aug 20, 2009) - June 23, 2009
- CASAC Teleconference on draft Risk/Exposure Assessment (Dec 19, 2008) - Dec 1, 2008
- CASAC Teleconference on draft Risk/Exposure Assessment (Nov 19, 2008) - Nov 5, 2008
- CASAC Meeting on draft ISA and REA (Oct 1-2, 2008) - Sept 15, 2008
- Workshop on Review of Oxides of Nitrogen and Sulfure (NOx/SOx) Secondary NAAQS - June 20, 2007
Litigation
- US Court of Appeals, DC Circuit Court Decision on 2012 NOx/SOx NAAQS Rulemaking - May 27, 2014 (PDF)(61.67 KB)
- Amendment to 2007 Consent Decree 10/22/2009(4 pp, 155 K)
- November 2007 Consent Decree with schedule for NO2/SO2 secondary NAAQS review - Nov 19, 2007
- Notice of Proposed Consent Decree - Request for Public Comment - Sept 20, 2007
Response to Comments
Planning Documents
- Draft Scope and Methods Plan for Risk/Exposure Assessment: Secondary NAAQS Review for Oxides of Nitrogen and Oxides of Sulfur (EPA-452/D-08-002) - Mar 2008
- Integrated Review Plan for the Secondary NAAQS for Nitrogen Dioxide and Sulfur Dioxide (EPA-452/R-08-006) - Dec 2007
Integrated Science Assessments (ISAs)\Criteria Documents
- Integrated Science Assessment for Oxides of Nitrogen and Sulfur - Ecological Criteria: FINAL REPORT - Dec 2008
- Integrated Science Assessment for Oxides of Nitrogen and Sulfur - Environmental Criteria: Second External Review Draft - Aug 2008
- Integrated Science Assessment for Oxides of Nitrogen and Sulfur - Environmental Criteria: First External Review Draft - Dec 2007
Policy Assessments
- Policy Assessment for the Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur, Main Body - Feb 2011
- Policy Assessment for the Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur, Appendices - Feb 2011
- Transmittal to CASAC of the Policy Assessment for the Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur - Feb 4, 2011
- Policy Assessment for the Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur: Main Body, January 14, 2011 Vers (PDF) (345 pp, 15 MB)
- Policy Assessment for the Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur: Appendices, January 14, 2011 (185 pp, 8 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
- Addendum for Chapter 5 - Policy Assessment for the Review of the Secondary NAAQS for NOx and SOx: Second External Review Draft - Sep 2010
- 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
- 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
- Policy Assessment for the Review of the Secondary NAAQS for NOx and SOx: Second External Review Draft - Sep 2010
- Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for NOx and SOx: First External Review Draft - Mar 2010
Risk and Exposure Assessment (REA) Documents
- REA for Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur - Final Report, Main Document - Sept 2009
- REA for Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur - Final Report, Appendices - Sept 2009
- Second Draft REA for Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur: Main Content - June 2009
- Second Draft REA for Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur: Appendices - June 2009
- First Draft REA for Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur - Chapters 7 and 8 - Aug 2008
- First Draft REA for Review of the Secondary NAAQS for Oxides of Nitrogen and Oxides of Sulfur - Chapters 1-6 and Attachments - Aug 2008
CASAC Documents