2013 Ozone Season Review / Ozone Monitoring Network Tom Downs,
CCM Maine Department of Environmental Protection Chief
Meteorologist, Bureau of Air Quality MAINE DEPARTMENT OF
ENVIRONMENTAL PROTECTION Protecting Maines Air, Land and Water
March 26, 2014 AQMC Meeting
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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep
2013 Ozone Season Summary Meteorological conditions (June August)
Ozone Season time series 2011-13 Event back trajectories Maine and
Eastern US 4 th high and Design Values Trends Potential Future
Ozone NAAQS Ozone Monitoring Network 2
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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep
3 June - August 2013 Surface and 850 mb Temperature Anomolies
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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep
4 JULY 2013 Anomalous SE Flow Tropical Maritime AIr Bermuda High
did not extend westward
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Summit of Cadillac Mt. 2011-13 Exceedance Back Trajectories 6
Atlantic Ocean Maine
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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep
Mid and Downeast Coast 2011-13 Exceedance Back Trajectories 7
Atlantic Ocean Gulf of Maine
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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep
Southwest Coast 2011-13 Exceedance Back Trajectories 8 Atlantic
Ocean Gulf of Maine
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March 25-27 CASAC Meeting to review the following EPA
documents: Health Risk and Exposure Assessment for Ozone Welfare
Risk and Exposure Assessment for Ozone Policy Assessment for the
Review of the Ozone NAAQS Potential for primary standard to be
lowered EPA staff recommends 60-70 ppb (most likely 65 or 70 ppb?)
Canadian standard currently 65 ppb, 63 ppb in 2015 and 62 ppb in
2020 Potential for Secondary W-126 NAAQS EPA staff recommends
7-15ppm-hrs (most likely 15ppm-hrs?) May 28 CASAC teleconference to
finalize recommendation letter to EPA EPA proposal may occur ~Dec
1, 2014 Jan 15, 2015(?) with final ~Oct 1 Nov 15, 2015(?). [Next
court date April 8] MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION
www.maine.gov/dep Potential Future Ozone NAAQS 15
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MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep
20 Potential changes to the Ozone Network? 1)Replacement for North
Lovell to monitor high spring ozone in the western mountains
2)Replacement for Bowdoinham to capture peak ozone along the coast
downwind of Portland (Phippsburg or Georgetown (Reid State
Park))
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www.maine.gov/dep Maine Department of Environmental Protection
Bureau of Air Quality 21