1. Sierra Nevada Ozone Summit June 4, 2008 State Strategies to Reduce Emissions of Ozone Forming Pollutants Kurt Karperos Chief, Air Quality and Transportation Planning California Air Resources Board

3. 3 State Strategy NOx Emphasis NOx is common to both ozone and particulate pollution NOx is common to both ozone and particulate pollution NOx reductions critical to help reach both ozone and PM2.5 standards NOx reductions critical to help reach both ozone and PM2.5 standards Most NOx is from mobile sources Most NOx is from mobile sources Legacy fleet dominates emissions Legacy fleet dominates emissionsTherefore, NOx reductions from legacy fleet main objective of current State Strategy NOx reductions from legacy fleet main objective of current State Strategy

4. 4 Construction Fleet Strategy Adopted emission standards becoming increasingly more stringent Adopted emission standards becoming increasingly more stringent Cleanest standards not until 2013-15 Cleanest standards not until 2013-15 Adopted new rule: Fleet average; retrofit and turnover Fleet average; retrofit and turnover Maximizes early diesel PM benefits Maximizes early diesel PM benefits Maximizes NOx reductions over time Maximizes NOx reductions over time 4

5. 5 Private Truck Fleet Strategy Truck emission standards have declined steadily over last 20 years Truck emission standards have declined steadily over last 20 years Proposed new measures: Fleet average Fleet average designed around 2010 cleanest standard designed around 2010 cleanest standard retrofit and turnover retrofit and turnover Need to maximize PM and ozone benefits Need to maximize PM and ozone benefits Late 2008 Board hearing Late 2008 Board hearing

6. 6 Passenger Vehicle Strategy New cars are 99% cleaner New cars are 99% cleaner Proposed new measures: Smog check improvements & enhancements Smog check improvements & enhancements Annual testing: older & high-mileage vehicles Annual testing: older & high-mileage vehicles More stringent pass/fail cutpoints More stringent pass/fail cutpoints Add small diesels and motorcycles Add small diesels and motorcycles Evaporative emissions and visible smoke testing Evaporative emissions and visible smoke testing Proposal for increased vehicle scrapping Proposal for increased vehicle scrapping 6

7. Reduce statewide GHG emissions to 1990 levels by 2020 Reduce statewide GHG emissions to 1990 levels by 2020 Provide a vision for a low carbon future – 2050 Provide a vision for a low carbon future – 2050 Additional reductions in criteria pollutants, toxic emissions Additional reductions in criteria pollutants, toxic emissions Co–benefits from Climate Change Measures