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Report on Proposed Ozone Standards

Report on Proposed Ozone Standards. March 25, 2010. Good News!. Air Quality is getting better in NC Emissions reductions work Thanks to Local/State/Federal Govt. initiatives We’ve met most of the goals of a decade ago. What’s changing? Our goals. Nitrogen Dioxide, final Lead, final

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Report on Proposed Ozone Standards

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  1. Report on Proposed Ozone Standards March 25, 2010

  2. Good News! • Air Quality is getting better in NC • Emissions reductions work • Thanks to Local/State/Federal Govt. initiatives • We’ve met most of the goals of a decade ago

  3. What’s changing? Our goals • Nitrogen Dioxide, final • Lead, final • Sulfur Dioxide, proposed • Ozone, proposed

  4. Ozone Proposal • On January 6, 2010, EPA proposed revisions to the National Ambient Air Quality Standards (NAAQS) for ground-level ozone. • Based on scientific evidence about ozone and its impacts on people and sensitive trees and plants.

  5. Ozone Proposal • Primary standard • established to protect public health • range of 0.060-0.070 parts per million (ppm) • Secondary standard • protects public welfare and the environment • range of 7-15 ppm-hours

  6. Ozone Proposal - Timeline *Most areas in NC will have attainment dates between 2014 & 2020

  7. Primary Standard What areas may be affected?

  8. Secondary Standard • EPA is proposing to establish a distinct cumulative, seasonal secondary standard at a level in the range of 7-15 ppm-hours. • Designed to account for the cumulative effects of repeated ozone exposures on sensitive vegetation during the three months of the year when ozone concentrations are highest.

  9. Ozone and the Environment • Ground-level ozone is absorbed by the leaves of plants, where it can: • Interfere with the ability to produce and store food • This can lead to reduced growth, biomass production and/or yields. • Make sensitive plants more susceptible to certain diseases, insects, other pollutants, competition and harsh weather. • Reduce or change species diversity • Visibly injure the leaves of plants, harming the appearance of vegetation in national parks, recreation areas and cities.

  10. Consequences of Nonattainment • Transportation and General Conformity • Nonattainment New Source Review (stationary point sources) • 50-100 ton per year new sources • 25-40 tons per year modifications • Emissions offsets • RACM (Reasonably Available Control Measures) • RACT (Reasonably Available Control Technology) • 15%+ emission reduction plans • Inspection and Maintenance Program for vehicles

  11. Contact Information Mike Abraczinskas, CPM, EIT Planning Section Chief NC Division of Air Quality (919) 715-3743 • Visit our web site: • http://www.ncair.org/ • Michael.Abraczinskas@ncdenr.gov

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