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EPA’s Proposed Fine Particulate Matter National Ambient Air Quality Standard (PM2.5 NAAQS )

EPA’s Proposed Fine Particulate Matter National Ambient Air Quality Standard (PM2.5 NAAQS ). Air Quality Committee Meeting July 11, 2012 Donnie Redmond Ambient Monitoring Section Chief (pinch-hitting for Planning). PM 2.5 Standard. Proposal signed June 14 Published June 29

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EPA’s Proposed Fine Particulate Matter National Ambient Air Quality Standard (PM2.5 NAAQS )

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  1. EPA’s Proposed Fine Particulate MatterNational Ambient Air Quality Standard(PM2.5 NAAQS) Air Quality Committee Meeting July 11, 2012 Donnie Redmond Ambient Monitoring Section Chief (pinch-hitting for Planning)

  2. PM2.5 Standard • Proposal signed June 14 • Published June 29 • Part of a consent decree to issue the final standard before the end of the year

  3. PM2.5 Primary Standards • Existing Standards • 1997 Annual standard 15 μg/m3 • 2006 24-hour standard 35 μg/m3 • Final Risk Assessment, March 2010 • Consider annual standard 10–13 μg/m3 • Consider daily standard 25–35 μg/m3 • 2012 Proposed • Revise annual standard to 12–13 μg/m3 • Leave daily standard at 35 μg/m3

  4. How will it affect NC? • Based on 2009-2011 data • Daily standard (35 μg/m3) • All below 25 μg/m3 • Annual standard (12-13 μg/m3 ) • Highest value is 11.2 μg/m3 • Designations will be based on either 2011-2013 or 2012-2014 data

  5. 2009-2011 Annual PM2.5Design Values

  6. PM2.5 Secondary Standard – Visibility (New!) • Proposes a separate visibility standard • 30 deciviews or 28 deciviews • Deciview • Is a visibility index • Similar to the Regional Haze Program • Uses speciated PM2.5 data and relative humidity to calculate light extinction • 24-hour averaging time; a 90th percentile form averaged over 3 years

  7. Visibility standard • Not limited to urban areas • Any speciated monitor is eligible, including Federally-operated ones • Our preliminary estimates show we will attain • EPA has not released their calculations

  8. Impacts on permits • EPA is proposing to grandfather preconstruction permitting applications that have made substantial progress through the review process at the time the final standards are issued

  9. How will new standards impact DAQ? • Establish near-road monitors • Charlotte and Raleigh by January 2014 • Possibly Durham and Greensboro in out years • Need to review data from Federally-operated monitors (apply to visibility)

  10. What’s next? • Comment period • Ends August 31 • Public hearings • Philadelphia, July 17 • Sacramento, July 19 • Final rule • Issued by December 14, 2012 • Designation recommendations • December 2013

  11. Questions? • Ask Sushma or Laura • Sushma Masemore • (919) 707-8700 • Laura Boothe • (919) 707-8721 • Donnie Redmond • 919-707-8468 • donnie.redmond@ncdenr.gov

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