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MCIC Workshop 2012 Complying with NC Air Quality Regulations Boiler MACT/GACT and 112j. Steve Schliesser Division of Air Quality Environmental Engineer March 2012. Topics to be Covered. Background - EPA Boiler MACT and GACT Effects of Vacatur on EPA Stay of Boiler Rules
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EPA Proposed Rule in Jan 2003
EPA Promulgated Final Rule in Sept 2004
U.S. Court Vacated and Remanded Final Rule in June 2007
EPA Proposed Rule in June 2010
U.S. Court Denied EPA Time-Extension Request in Jan 2011
EPA Promulgated Final Rule in March 2011
EPA Stayed Effective Date of Final Rule in May 2011
EPA Proposed Amendments to Final Rule in Dec 2011
U.S. Court Vacated EPA Stay in Jan 2012
EPA Expects to Promulgate Final Rule by May 2012
EPA stayed March Boiler MACT final rule in May 2011
U.S. Court vacated EPA stay in Jan 2012
- EPA had authority, just did not follow procedure
Slight national impact, but one NC facility with huge impact -- lost 112(j) permit since rule’s restored effective date occurred before permit was issued
DAQ submitted comments on re-proposal in Feb 2012
EPA expects to finalize Boiler MACT in May 2012
Re-proposal offer more flexibility, less cost impact, with offsetting increases/decreases in HAP emissions
Highlights of proposed changes
Added new sub-categories for total of 19
New and alternative HAP emissions limits
New work practice standards and provisions
Recently (Re)Proposed Boiler MACT
- Review MACT floor pool test reports for valid data
- Finding invalid data or re-categorizing will produce another pool and MACT floor
- previously variability factor ranged from of 3-10.
Emission Standards for Existing Units
Particulate Matter Emission Limits
- Variability factor = 70, outside normal range of 3-10
- Variability factor = 8, within normal range of 3-10
only 4 would reduce mercury emissions.
- EPA no-action-assurance memo delays tune-up deadline til Oct 2012
EPA boiler rules website: http://www.epa.gov/airquality/combustion/index.html
EPA Boiler MACT docket, go to www.regulations.gov
then enter EPA–HQ–OAR–2002–0058