SO2 NAAQS
(National Ambient Air Quality Standards)
Staff Contact
Eric Merchant
Air Resources Mgmt. Bureau
(406) 444-1457
General Information
- WESTAR SO2 Guidance Comments
- Industry Seeks EPA-Led Modeling 'Summit' to Resolve NAAQS Concerns
- EPA Advisers Urge Reconsideration of Modeling Mandate for SO2 NAAQS
- Western States Fear Major Workload Problems with Draft SO2 NAAQS Guide
- EPA Guidance for SO2 NAAQS Stresses Air Quality Modeling Early Action
- EPA Modeling Plan Spurs States' Threat to Return SO2 Program
- EPA SO2 NAAQS Attainment Guidance Uses Contested Focus on Modeling
- EPA Denies Request to Reconsider SO2 NAAQS, Shifting Focus to Lawsuit
- SO2 NAAQS Final Rule
- SO2 NAAQS Fact Sheet
- EPA Spars With States, Industry Over Request To Stay SO2 Air Standard
- EPA, Activists Ask Court To Block States, Industry Bid To Stay SO2 NAAQS
SO2 NAAQS Designation
March 16, 2011 Stakeholder Meeting
December 15, 2010 Stakeholder Meeting
October 28, 2010 Stakeholder Meeting
September 16, 2010 Stakeholder Meeting
Billings Coburn Road SO2 Ambient Monitoring and Quality Assurance Data
- Coburn SO2 DEQ Audits 2010
- Coburn SO2 DEQ Audits 2009
- Coburn SO2 DEQ Audits 2008
- Coburn SO2 DEQ Audits 2007
- Coburn SO2 Operator Cals 2010
- Coburn SO2 Operator Cals 2009
- Coburn SO2 Operator Cals 2008
- Coburn SO2 Operator Cals 2007
2007-2009 Coburn Road Data Alteration Memo
API Model 100A Equivalent Method Designation
