Ozone Monitoring Issues

1
Ozone Monitoring Issues Opportunities

• Ozone Transport Commission
• MANE-VU Committee Meeting
• September 24, 2014
• Washington, DC
• Will Ollison

2
Recommendations

• States should ask that EPA allow adjustment of O3
  design values (DVs) to account for actual
  population dose (as allowed for PM design values)
  to eliminate over-regulation of high altitude (gt
  1000 feet) locations
• Similarly, states should lower O3 monitor inlets
  within allowed 2-15 meter heights above grade to
  adjust DVs to more accurately reflect typical 1-2
  meter above grade population breathing zone
  exposures outdoors
• States should also ask that EPA allow similar DV
  adjustment (ca. 15) of mandated 10 meter
  CASTNET inlet height O3 DVs to 2 meter values to
  reflect typical population breathing zone
  exposures outdoors

3
High Elevation O3 Monitors ( gt 1000 feet)

• ? 14,100 ft
• DV cut 28 ppb
• ? 9000-12,000 ft
• DV cut 20-24 ppb
• ? 6300-9000 ft
• DV cut 15-19 ppb
• ? 3900-6300 ft
• DV cut 10-14 ppb
• ? 1700-3900 ft
• DV cut 5-9 ppb
• ? 1000-1700 ft
• DV cut 2-4 ppb

4
O3 Monitor Inlet Heights Above Grade