1. Exceptional Events: Lessons Learned Eric C. Massey, Director Air Quality Division Arizona Department of Environmental Quality Phoenix, AZ July 5, 2011Credit: Daniel BryantDaniel Bryant

2. July 2-8, 2012 July 5, 2011 Event Site 24-Hour Average PM 10 (μg/m 3 ) Hourly Maximum PM 10 (μg/m 3 ) Buckeye1632186 Central Phoenix 2773578 Durango Complex 1561974 Dysart2192731 Glendale1672095 Greenwood1551990 Higley3625189 JLG Supersite3316348 South Phoenix 2062575 West Chandler 3602967 West 43 rd 1501946 West Phoenix2784623 Zuni Hills1471804 Casa Grande4795300 Combs School 4198437 Cowtown231649377 Pinal County Housing 204041582 Stanfield5412246

3. Exceptional Events Timeline Phoenix Area = NAA since 1990 amendments –5% Plan submitted in 2007 Calendar Year 2010 –Resubmitted 4 EE demonstrations for 2008 Each > 400 pages of highly technical information –Unsuccessful, withdrew 5% Plan Calendar Year 2011 - EPA Guidance Calendar Year 2012 –New 5% Plan submitted –ADEQ submitted July 2-8, 2011 Events Total package < 250 pages in length Approved on September 6, 2012 –EPA revised guidance, worked with ADEQ Further streamlining 40-60 pages of new material per event

4. Upcoming Submissions 22 additional packages –25 exceedance days Some easier – regional events Some harder – single monitor Schedule –First set to public notice on 12/1 Anticipating 6 demonstrations (1 rural) –Second set to public notice on 1/1/13 Anticipating 50-70% completion –Final set to public notice on 4/1/13 Credit: Mike Maxham

5. Who and How Much? ADEQ staff lead the project Local help –MAG, Maricopa County Contractors engaged –Sierra Research –Sonoma Technology Cost –Staff time –$400,000 in contract charges Only includes Maricopa County

6. Repeated Events Set the stage in the first submission: –Introduction and background done once –Most of conceptual model –Historical fluctuations updated periodically –Not reasonably controllable or preventable Event specific information: –Some conceptual model elements –Clear causal relationship –“But for” analysis –Supporting forecasts/data/analyses

7. Other Helpful Tools Strategic planning performance measures –Focus on improving Air Quality –Submit EE’s within 180 days –EPA concurrence on 95% of submissions Develop a screening tool

8. Recommendations Get really smart people Involve the customer Tell the story in words, not just data Use photos/video evidence of the event wherever possible Go fast