Sulfur Dioxide (SO2) Designation History
Background
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SO2 Health and Background Information from the U.S. Environmental Protection Agency (USEPA)
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North Carolina SO2 Design Values from Air Quality Monitoring
Designations
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Designations Related to the Sulfur Dioxide (SO2) Data Requirements Rule
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12/21/2020 - EPA's Final Rule 4 Boundary Designations for the 2010 1-Hour Sulfur Dioxide (SO2) National Ambient Air Quality Standard.
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12/21/2017 - EPA's Final Boundary Designations for the 2010 1-Hour Sulfur Dioxide (SO2) National Ambient Air Quality Standard.
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10/23/2017 - State of North Carolina's Response to EPA's 120-Day Letter
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8/22/2017 - EPA's 120 Day Letter Responding to NC's January 13, 2017 Boundary Recommendations
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1/13/2017 - North Carolina's Recommendation on Boundaries for the 2010 1-Hour Sulfur Dioxide (SO2) National Ambient Air Quality Standard
- Transmittal Letter to EPA
- State of North Carolina's Recommendation on Boundaries For the 2010 1-Hour Sulfur Dioxide National Ambient Air Quality Standard
- Attachment A - North Carolina's 2010 SO2 NAAQS Boundary Recommendation
- Attachment B - Maps of Modeled Facilites
- Attachment C - Maps of Monitored Facilites
- Attachment D - Maps of Ambient Air Quality Monitors
- Attachment E - SO2 Facilities and their 2015 Emissions
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6/30/2016 - North Carolina SO2 Data Requirements Rule Air Quality Characterization Submittal
- Air Quality Characterization via Modeling – Modeling Reports
- Air Quality Characterization via Modeling – Modeling Protocols
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Air Quality Characterization via Monitoring –Plans for characterization of air quality via monitoring for the following facilities are included in North Carolina’s Annual Monitoring Network Plan:
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PCS Phosphate Company, Inc. - Aurora
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CPI USA North Carolina – Southport Plant
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Blue Ridge Paper Products – Canton Mill
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Duke Energy Progress, LLC – Roxboro Plant
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3/18/2016 - EPA response to NC's Facilities in North Carolina Subject to the SO2 Data Requirements Rule
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1/15/2016 - Facilities in North Carolina Subject to the SO2 Data Requirements Rule
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Designations for Brunswick County
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4/23/2021 – Redesignation Request for Brunswick County for the 2010 1-Hour Sulfur Dioxide Primary NAAQS
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6/30/2016 – EPA’s second round of SO2 designations
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4/19/2016 - North Carolina's Updated Boundary Recommendations for Brunswick County and New Hanover County
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Attachment: CPI Southport Permit, issued 4/18/2016
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2/16/2016 - EPA Response (120-day letter) and Technical Support Document
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9/18/2015 - North Carolina's Boundary Recommendations for Brunswick County and New Hanover County
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Initial Statewide Boundary Recommendations
Implementation
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7/14/2014 - NCDAQ's Comments on USEPA's Data Requirements Rule for the 1-Hour SO2 Standard
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6/29/2012 - NCDAQ's Comments on USEPA's Proposed SO2 Implementation
2010 1-hour SO2 Standard
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6/22/2010 - EPA's Final 1-hour SO2 NAAQS Rule
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12/8/2009 - NCDAQ's Comments on USEPA's Proposed SO2 Standard