1. ENVIRONMENTAL PROGRAMS Air Quality Update Regional Council February 28, 2007

2. ENVIRONMENTAL PROGRAMS Copyright © 2007

3. ENVIRONMENTAL PROGRAMS Copyright © 2007 PM-10 Monitoring Data EXCEEDANCES OF THE 24-HR PM-10 STANDARD BY MONITOR IN MARICOPA COUNTY Notes: 1. Exceedances that have been approved or are pending approval by EPA as natural or exceptional events have been removed from this chart. 2. The exceedance at the Bethune, Greenwood, and W. Phoenix monitors occurred on 12/12/05.

4. ENVIRONMENTAL PROGRAMS Copyright © 2007 PM-10 Monitoring Data DAYS EXCEEDING THE 24-HOUR PM-10 STANDARD IN MARICOPA COUNTY Notes: 1. Exceedance days that are approved or pending approval by EPA as natural or exceptional events have been removed from this chart. 2. Most of the exceedances before 2004 were recorded by filter-based monitors that measured PM-10 concentrations on every sixth day. Since 2004, the filter-based monitors that exceeded the PM-10 standard have been replaced with monitors that measure PM-10 concentrations every day.

5. ENVIRONMENTAL PROGRAMS Copyright © 2007 PM-10 5 Percent Plan (Clean Air Act Sec. 189) Plan due December 31, 2007 Plan due December 31, 2007 5 percent reduction in emissions per year until standard is attained 5 percent reduction in emissions per year until standard is attained Based upon most recent emissions inventory (2005) Based upon most recent emissions inventory (2005) Attainment modeling demonstration Attainment modeling demonstration 3 years of clean data at monitors needed for attainment (07, 08, 09) 3 years of clean data at monitors needed for attainment (07, 08, 09)

6. ENVIRONMENTAL PROGRAMS Preliminary Results of the MAG PM10 Source Attribution and Deposition Study Presentation to the Air Quality Technical Advisory Committee Robert A. Baxter, CCM January 11, 2007

7. ENVIRONMENTAL PROGRAMS Copyright © 2007 Approach Assess existing meteorological and PM data Evaluate exceedance day conditions Evaluate exceedance day conditions Focus on Durango and West 43 rd monitoring sites Focus on Durango and West 43 rd monitoring sites Determine key wind directions and potential sources Determine key wind directions and potential sources Identify key time periods for detailed sampling Identify key time periods for detailed sampling Daily coordination with MAG Daily coordination with MAG

8. ENVIRONMENTAL PROGRAMS Copyright © 2007 PM-10 Monitoring Vehicle

9. ENVIRONMENTAL PROGRAMS Copyright © 2007 Trackout

10. ENVIRONMENTAL PROGRAMS Copyright © 2007 Unpaved Roads and Dragout

11. ENVIRONMENTAL PROGRAMS Copyright © 2007 Unpaved Roads Dragout and Unpaved Shoulders

12. ENVIRONMENTAL PROGRAMS Copyright © 2007 Open Burning

13. ENVIRONMENTAL PROGRAMS Copyright © 2007 Agriculture

14. ENVIRONMENTAL PROGRAMS Copyright © 2007 Unpaved Lots

15. ENVIRONMENTAL PROGRAMS Copyright © 2007 Vehicle Activity on Unpaved Lots Saturday November 18, 2006

16. ENVIRONMENTAL PROGRAMS Copyright © 2007 Annual PM-10 Emissions

17. ENVIRONMENTAL PROGRAMS Copyright © 2007 Preliminary Draft List of PM-10 Measures Dust Managers at construction sites Dust Managers at construction sites Extensive dust control training Extensive dust control training Strengthened trackout provisions Strengthened trackout provisions Fully implement Rule 316 for nonmetallic mineral processing Fully implement Rule 316 for nonmetallic mineral processing Reduce off-road vehicle use Reduce off-road vehicle use Pave or stabilize dirt roads, shoulders, parking lots Pave or stabilize dirt roads, shoulders, parking lots Prohibit new dirt roads Prohibit new dirt roads Stabilize vacant lots Stabilize vacant lots Increase open burning fines Increase open burning fines Ag measures (Gov’s Ag Best Management Practices Committee) Ag measures (Gov’s Ag Best Management Practices Committee)

18. ENVIRONMENTAL PROGRAMS Copyright © 2007 Clean Air Act Sanctions Sanctions imposed for Sanctions imposed for Failure to submit plan Failure to submit plan Failure to implement any plan requirement Failure to implement any plan requirement Failure to make any required submission Failure to make any required submission EPA disapproval of plan EPA disapproval of plan Sanctions timeline Sanctions timeline 18 months - Tighter controls on major 18 months - Tighter controls on major industries (2 to 1 offsets in emissions) industries (2 to 1 offsets in emissions) 24 months - Loss of federal highway funds and federal implementation plan 24 months - Loss of federal highway funds and federal implementation plan

19. ENVIRONMENTAL PROGRAMS Copyright © 2007 Failure to Attain the Standards  Continue to add more measures to reduce emissions by 5 percent per year until attainment is met, as measured by the monitor data  Best Course of Action - Attain the standards as quickly as possible

20. ENVIRONMENTAL PROGRAMS Copyright © 2007 Schedule – Five Percent Plan for PM-10 Feb-Mar 2007 – Suggested List of Measures for Consideration Feb-Mar 2007 – Suggested List of Measures for Consideration Mar 2007 – Model validation for 2005/2006 episodes Mar 2007 – Model validation for 2005/2006 episodes Jun 2007 – Commitments to implement measures Jun 2007 – Commitments to implement measures Aug 2007 – Committed measure modeling and evaluation process Aug 2007 – Committed measure modeling and evaluation process Sep 2007 – Documents available Sep 2007 – Documents available Oct 2007 – Public Hearing Oct 2007 – Public Hearing Oct 2007 – AQ TAC recommendation Oct 2007 – AQ TAC recommendation Dec 2007 – Regional Council action Dec 2007 – Regional Council action Dec 2007 – Submit to ADEQ/EPA Dec 2007 – Submit to ADEQ/EPA Mar 2008 – EPA adequacy finding for conformity budget Mar 2008 – EPA adequacy finding for conformity budget

21. ENVIRONMENTAL PROGRAMS Copyright © 2007

22. ENVIRONMENTAL PROGRAMS Copyright © 2007 8-Hour Ozone Monitoring Data VIOLATIONS OF THE 8-HOUR OZONE STANDARD IN THE MARICOPA COUNTY NONATTAINMENT AREA Number of Violating Monitors

23. ENVIRONMENTAL PROGRAMS Copyright © 2007 Attainment Demonstration for Eight-Hour Ozone EPA nonattainment designations were effective on June 15, 2004 EPA nonattainment designations were effective on June 15, 2004 Maricopa County nonattainment area is classified as “Basic” Maricopa County nonattainment area is classified as “Basic” Plan due to EPA by June 15, 2007 Plan due to EPA by June 15, 2007 Use most recent emissions inventory Use most recent emissions inventory Demonstrate attainment via modeling Demonstrate attainment via modeling Attainment of the standard required at all ozone monitors by June 15, 2009 Attainment of the standard required at all ozone monitors by June 15, 2009 Based on 2006-2008 monitoring data Based on 2006-2008 monitoring data

24. ENVIRONMENTAL PROGRAMS Copyright © 2007 Committed Measures in the One- Hour Ozone Maintenance Plan Maintenance Measures Maintenance Measures Summer Fuel Reformulation (May 1-Sept 30) Summer Fuel Reformulation (May 1-Sept 30) Phased-In Emission Test Cutpoints Phased-In Emission Test Cutpoints One-Time Waiver from Vehicle Emissions Test One-Time Waiver from Vehicle Emissions Test Coordinate Traffic Signal Systems Coordinate Traffic Signal Systems Tougher Enforcement of Vehicle Registration and Emission Test Compliance Tougher Enforcement of Vehicle Registration and Emission Test Compliance Maricopa County Rule 348: Aerospace Manufacturing and Rework Operations Maricopa County Rule 348: Aerospace Manufacturing and Rework Operations Contingency Measures Contingency Measures Expansion of Area A Boundaries Expansion of Area A Boundaries Gross Emitter Waiver Provision Gross Emitter Waiver Provision Increase Waiver Repair Limit Increase Waiver Repair Limit

25. ENVIRONMENTAL PROGRAMS For more information Contact: Lindy Bauer, MAG (602) 254-6300 www.mag.maricopa.gov