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Ozone Planning and SIP Development Status

Ozone Planning and SIP Development Status. Public Meeting – Aurora Central Library August 14, 2008. Ground-Level Ozone Pollution. Secondary air pollutant formed in the atmosphere through reaction of: Volatile Organic Compounds (VOC) Nitrogen Oxides (NOx)

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Ozone Planning and SIP Development Status

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  1. Ozone Planning and SIP Development Status Public Meeting – Aurora Central Library August 14, 2008

  2. Ground-Level Ozone Pollution • Secondary air pollutant formed in the atmosphere through reaction of: • Volatile Organic Compounds (VOC) • Nitrogen Oxides (NOx) • Prime conditions for ozone formation • Intense sunlight, high temperatures, persistent high pressure systems, light winds & little moisture • Ozone can trigger attacks & symptoms in individuals with pre-existing health conditions, as well as healthy individuals. • Asthma affects more than 89,000 children between the ages of 1 and 14 in Colorado

  3. Ozone Formation

  4. Understanding WhereOzone Comes From • Anthropogenic sources (man-made) • Approximately 500 tons per day VOCs • Approximately 400 tons per day NOx

  5. History • EPA established more stringent 8-hour ozone standard in 1997 • Early Action Compact with EPA – 2002 • Ozone Action Plan – 2004 • Region violated 8-hour standard in 2007 based on 2005-2007 3-year average • EPA designated the Denver/NFR region nonattainment in November 2007 • Region must submit a new ozone plan (SIP) to EPA by July 1, 2009

  6. Planning Overview • Strategy evaluation and development • First round of strategy analysis nearing completion • RAQC has approved strategies to include in draft plan • Photochemical air quality modeling • Preliminary 2006/2010 base case modeling complete • Sensitivity and source apportionment modeling underway • Proposed control package(s) modeling in August • Stakeholder involvement • Over 40 stakeholder and public meetings • Proposed Ozone Action Plan and SIP • Draft plan for board and public review by August 1 • Proposal to AQCC in September • AQCC adoption in December • Legislative review during 2009 session

  7. VOC Emission Inventory~450 tpd

  8. NOx Emission Inventory~336 tpd

  9. Proposed SIP Strategies • More stringent I/M cutpoints (Denver area) • 7.8 RVP gasoline in NFR (same as Denver area) • Increase condensate tank control requirements – 95% on all tanks >10 tpy • Pneumatic valve controller replacements • Expand Reg. 7 (VOC point source control) to entire NAA • Remove exemptions for sources to file APENs and obtain permits • Require RACT for minor point sources in entire NAA

  10. Proposed State-Only Strategies • I/M program in North Front Range • High-emitter pilot program (Denver area) • Tighten collector plate requirements • Control requirements for smaller O&G condensate tanks – 95% control for tanks > 2tpy • Statewide oil & gas regulations – internal combustion engines

  11. Strategies For Further Review • Ozone Fuels Strategies • Lower RVP gasoline (7.0 RVP) • Federal Reformulated Gasoline • Eliminate ethanol waiver • Controls on larger NOx sources • Power plants • Boilers • Cement kilns • Statewide oil & gas controls for new condensate tanks and pneumatic valves • CA Paints/Solvents/Consumer Products rule

  12. Emission Reductions

  13. Emission Budgets • Motor vehicle emissions budgets for VOC and NOx will be established based on 2010 attainment inventory • Considering two subarea budgets • Denver Metro Area (including southern Weld Co.) • North Front Range • Separate conformity determinations by DRCOG and NFRMPO based on their subarea budgets

  14. Conformity Subareas

  15. Next Steps • Draft SIP available on ozoneaware.org • Public meetings • August 20 – RAQC Board meeting – 3:00 p.m. • RAQC approval of proposed SIP – Sept. 8 • RAQC proposes SIP to Air Quality Control Commission – September 18 • AQCC public hearing and SIP adoption

  16. New 8-Hour Ozone Standards • Final standards announced by EPA Administrator on March 12 • EPA concluded 1997 standards were not adequate to protect public health and welfare • Lowered primary and secondary standards to 0.075 ppm • Maintained current form of standards • 8-hour averaging period • 3-year average of annual 4th maximum 8-hour values at each monitoring site

  17. Implementation Schedule • Nonattainment designations • State recommendations by March 2009 • Based on 2006-2008 ozone data • EPA makes final designations by March 2010 • Based on 2007-2009 ozone data • Attainment SIPs • Due by March 2013 (3 years after final designations) • Attainment Dates • 2013-2030 depending on severity of problem and classification • Classifications will be addressed by future EPA rulemaking

  18. 1997 Ozone Standards • For now, 1997 8-hour ozone standards and all the associated regulatory requirements remain in place • States and nonattainment areas should continue their plans for implementing the 1997 standards • EPA will address transition issues from the 1997 standards to the 2008 standards in a separate rulemaking

  19. Days Above .075 ppm(Denver/North Front Range Area)

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