1. 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 Maine’s Air, Land and Water March 26, 2014 AQMC Meeting

2. 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

3. MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep 3 June - August 2013 Surface and 850 mb Temperature Anomolies

4. MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep 4 JULY 2013 Anomalous SE Flow – Tropical Maritime AIr Bermuda High did not extend westward

5. MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep 5

6. Summit of Cadillac Mt. 2011-13 Exceedance Back Trajectories 6 Atlantic Ocean Maine

7. MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep Mid and Downeast Coast 2011-13 Exceedance Back Trajectories 7 Atlantic Ocean Gulf of Maine

8. 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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14. MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep 14

15.  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

16. MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep 16

17. MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep 17

18. MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep 18

19. MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep 19

20. 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))

21. www.maine.gov/dep Maine Department of Environmental Protection Bureau of Air Quality 21