Post on 24-Dec-2015
Exceptional Events:Lessons Learned
Eric C. Massey, DirectorAir Quality Division
Arizona Department of Environmental Quality
Phoenix, AZ July 5, 2011 Credit: Daniel Bryant
July 2-8, 2012July 5, 2011 Event
Site24-Hour Average
PM10
(μg/m3)
Hourly Maximum PM10
(μg/m3)Buckeye 163 2186Central Phoenix
277 3578
Durango Complex
156 1974
Dysart 219 2731Glendale 167 2095Greenwood 155 1990Higley 362 5189JLG Supersite 331 6348South Phoenix
206 2575
West Chandler
360 2967
West 43rd 150 1946West Phoenix 278 4623Zuni Hills 147 1804Casa Grande 479 5300Combs School
419 8437
Cowtown 2316 49377Pinal County Housing
2040 41582
Stanfield 54 12246
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
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
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
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
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