240 likes | 364 Views
Sacramento Overview Sierra Ozone Summit. Larry Greene Air Pollution Control Officer. Summer Ground-level Ozone (smog).
E N D
Sacramento OverviewSierra Ozone Summit Larry Greene Air Pollution Control Officer
Summer Ground-level Ozone (smog) The Sacramento valley is like a bowl. Strong summer temperature inversions clamp a “lid” on the bowl, creating stagnant conditions that cause pollution to build until the inversion breaks and ocean breezes dilute and dissipate ground-level ozone air pollution. We’re Geographically-Challenged NOX + VOC+Sunlight = 0zone + =
National Rankings - 2007 Region is Consistently ranked in the Top 10 for ozone pollution 1. Los Angeles 6. Sacramento 2. San Joaquin Valley 7. Baton Rouge 3. Southeast Desert, CA 8. Dallas 4. Houston 9. Philadelphia 5. Nevada County, CA 10. Ventura
Federal Ozone Non-attainment Area 120 miles
Air Quality Trends - OzoneConcentrations, 1980 - 2007 1 hour 31% improvement 8 hour 19% improvement
Emission Source Equivalents 1 TPD of VOC and NOx (Year 2019) 200,000 cars* 18,000 HD trucks 72 Locomotives (NOx only) 310 Gas Stations** (VOC only) * Base on average vehicle fleet mix ** No additional controls after 2005
2002 Emission Inventory Districts State/Federal
Controls in Sacramento • Over 40 adopted rules affecting • Residents and schools • water heaters, • house paints, varnishes and other solvents • wood burning appliances • Industrial and commercial sources • Electric power plants Automobile refinishing • Auto repair shops Bakeries • Asphalt paving Cabinet shops • Boilers and water heaters Landfill gas • Boat manufacturing Printing • Agricultural sources • Agricultural burning • Confined animal feeding operations • 10+ new or amended rules under consideration
2008 Benefits From District VOC RulesSacramento Region63 Tons/Day
2008 Benefits From District NOx RulesSacramento Region20 Tons/Day
Innovative Clean Air Strategies • Incentive programs • Other strategies
District Mobile Source Actions CMAQ School Bus EPA DMV Mitigation Other • Since 1998, 3784 engines, $88 million, 6.5 tons of NOx per day. ($13 million/ton per day)
Other Innovations • Raley’s trucks • Off road NOx devices • Propane generators • Idling devices • Switch engines • Cap Corridor trains
Nevada County Activities • Grass Valley in Sacramento’s Spare the Air ozone movies • Extended movies to 24 hours per day to capture Grass Valley peak ozone levels • Invited Northern Sierra APCD staff to participate in Sacramento planning efforts • Community invited to suggest additional control measures • Coordinate EPA grant to fund additional air monitoring equipment in Nevada County
Progress towards attainment Use model results to project attainment Colored lines show attainment dates for each part of the region
Attainment Goal How difficult is attainment in 2012?Effects of draconian strategies Need 40% reductions to attain.