MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION ASO 6m AGL MONTH MAR YEAR 2011 EQUIPMENT TEI O3 ANALYZER MODEL 49I GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 19.5 19.5 19.5 19.5 19.4 19.3 19.2 19.2 19.1 18.9 18.8 18.8 18.9 18.8 18.9 19.0 18.9 19.1 19.4 19.5 19.4 19.3 19.2 19.0 19.2 19.5 2 18.9 18.8 18.5 18.4 18.3 18.2 18.1 18.3 18.8 19.0 20.1 20.3 20.3 20.3 20.2 20.1 20.1 20.2 20.2 20.3 20.3 20.4 20.5 20.5 19.5 20.5 3 20.6 20.6 20.6 20.6 20.7 20.7 20.5 20.2 20.0 19.3 18.8 18.5 18.3 18.3 18.2 18.2 18.2 18.2 18.2 18.2 18.2 18.3 18.3 18.4 19.2 20.7 4 18.4 18.4 18.4 18.4 18.6 18.6 18.6 18.8 18.8 18.9 18.9 19.0 19.0 19.1 19.1 19.1 19.2 19.2 19.2 19.2 19.2 19.3 19.3 19.3 18.9 19.3 5 19.3 19.3 19.5 19.7 20.1 20.3 20.4 20.5 20.6 20.7 20.8 20.9 21.1 21.2 21.5 21.7 21.9 22.1 22.4 22.6 22.8 22.9 23.1 23.2 21.2 23.2 6 23.2 23.3 23.3 23.5 23.5 23.5 23.6 23.6 23.6 23.6 23.6 23.6 23.6 23.5 23.5 23.4 23.3 23.3 23.2 23.2 999.9 999.9 22.8 22.5 23.4 23.6 7 22.3 22.2 22.2 22.2 22.3 22.4 22.5 22.7 22.9 23.1 23.4 23.7 24.0 24.1 24.2 24.2 24.4 24.4 24.5 24.4 24.2 24.0 23.8 23.5 23.4 24.5 8 23.4 23.3 23.2 23.1 23.1 23.1 23.1 23.1 23.0 23.0 22.9 22.7 22.7 22.6 22.6 22.5 22.3 22.1 22.0 21.8 21.7 21.7 21.6 21.5 22.6 23.4 9 21.4 21.2 21.1 21.0 21.0 20.9 20.9 20.8 20.7 20.7 20.5 20.4 20.2 20.0 19.7 19.5 19.3 19.1 19.0 19.1 19.1 19.5 19.7 19.8 20.2 21.4 10 20.1 20.8 21.2 21.5 21.7 21.8 21.9 21.8 21.8 21.8 21.7 21.7 21.7 21.6 21.6 21.7 21.7 21.8 21.9 22.1 22.3 22.3 22.5 22.6 21.7 22.6 11 22.6 22.5 22.4 22.3 22.2 22.0 21.8 21.6 21.5 21.4 21.5 21.6 21.7 21.9 22.1 22.3 22.7 23.0 23.3 23.7 23.9 24.2 24.1 24.0 22.5 24.2 12 24.0 23.7 23.7 24.1 24.4 24.5 24.7 24.9 25.5 25.5 25.3 25.3 25.3 25.3 25.1 25.0 25.0 24.9 24.8 24.7 24.6 24.6 24.5 24.4 24.7 25.5 13 24.3 24.2 24.2 24.1 24.0 23.9 24.0 23.8 23.7 23.6 23.4 23.1 22.8 22.6 22.2 21.8 21.9 21.9 22.0 22.2 999.9 999.9 22.7 23.1 23.2 24.3 14 23.1 23.3 23.3 23.4 23.4 23.4 23.4 23.4 23.4 23.3 23.4 23.3 23.2 23.1 23.0 23.0 22.8 22.7 22.5 22.4 22.3 22.1 22.0 21.9 23.0 23.4 15 21.9 21.8 21.8 21.7 21.7 21.7 21.7 21.6 21.6 21.6 21.5 21.5 21.5 21.4 21.5 21.4 21.4 21.4 21.4 21.3 21.3 21.3 21.3 21.2 21.5 21.9 16 21.3 21.2 21.2 21.2 21.1 21.1 21.0 21.0 21.1 21.0 21.0 21.0 21.1 21.2 21.3 21.7 22.0 21.9 21.9 21.8 21.8 22.1 22.1 21.7 21.4 22.1 17 20.9 20.4 20.3 20.2 20.4 20.4 20.5 20.5 20.6 20.9 21.2 21.5 21.9 22.1 22.3 22.7 22.9 23.1 23.2 23.2 23.3 23.4 23.6 24.0 21.8 24.0 18 24.5 25.3 26.5 26.5 25.9 25.4 24.9 24.5 24.1 23.7 23.4 23.4 23.4 23.4 23.3 23.3 23.3 23.2 23.0 23.0 23.0 23.0 22.9 22.9 24.0 26.5 19 22.9 22.8 22.8 22.8 22.8 22.9 23.0 23.1 23.1 22.9 22.6 22.2 22.1 22.1 22.0 22.1 22.1 22.1 22.2 22.2 22.1 22.2 22.2 22.1 22.5 23.1 20 22.1 22.1 22.1 22.1 22.0 22.0 22.2 22.1 22.0 22.0 22.0 22.0 22.1 22.2 22.4 22.4 22.3 22.2 22.2 22.2 21.9 999.9 999.9 22.0 22.1 22.4 21 22.0 21.9 21.9 21.9 22.0 22.0 22.3 22.6 22.9 23.2 23.5 23.6 23.7 23.8 23.8 23.8 23.8 24.2 24.4 24.3 24.3 24.2 24.2 24.3 23.3 24.4 22 24.4 24.5 24.5 24.4 24.4 24.5 24.5 24.6 24.7 24.8 24.8 24.9 25.0 24.9 25.0 25.0 25.0 25.0 25.0 24.9 24.9 25.0 25.1 25.0 24.8 25.1 23 25.2 25.2 25.2 24.9 24.5 24.2 24.3 24.4 24.4 24.3 24.0 23.8 23.5 23.3 23.2 23.2 23.2 23.1 23.2 23.2 23.5 23.8 24.3 24.8 24.0 25.2 24 25.1 25.3 25.3 25.4 25.5 25.6 25.5 25.3 25.0 24.8 24.6 24.4 24.3 24.3 24.3 24.4 24.4 24.3 24.4 24.4 24.4 24.4 24.4 24.3 24.7 25.6 25 24.2 24.1 24.0 23.9 23.8 23.7 23.7 23.5 23.4 23.4 23.3 23.2 23.1 23.2 23.2 23.3 23.6 23.6 23.6 23.5 23.6 23.6 23.6 23.6 23.6 24.2 26 23.7 23.8 23.8 23.6 23.5 23.6 23.8 23.9 23.9 23.8 23.7 23.6 23.6 23.5 23.5 23.4 23.4 23.4 23.5 23.5 23.5 23.5 23.5 23.4 23.6 23.9 27 23.5 23.5 23.5 23.5 23.6 23.6 23.7 23.8 23.9 24.0 24.1 24.2 24.2 24.3 24.2 24.1 24.1 24.0 23.9 23.9 999.9 999.9 24.0 24.1 23.9 24.3 28 24.0 24.0 24.0 24.0 24.1 24.2 24.2 24.4 24.6 24.7 24.8 24.8 24.7 24.6 24.6 24.9 25.3 25.4 25.4 25.3 25.1 25.0 24.9 24.8 24.7 25.4 29 24.8 24.8 24.9 25.0 25.1 25.1 25.2 25.2 25.3 25.3 25.3 25.3 25.3 25.3 25.3 25.4 25.5 25.5 25.5 25.5 25.4 25.4 25.3 25.3 25.2 25.5 30 25.2 25.2 25.1 24.9 24.9 24.9 25.1 25.1 25.1 25.1 25.1 25.1 25.0 25.1 25.0 25.0 25.0 25.1 25.1 25.3 25.4 25.3 25.2 25.2 25.1 25.4 31 25.1 24.8 24.7 24.5 24.5 24.5 24.5 24.5 24.3 23.9 24.2 24.4 24.8 25.0 25.2 25.3 25.4 25.5 25.5 25.6 25.7 25.6 25.6 25.5 24.9 25.7 Mean 22.6 22.6 22.7 22.7 22.7 22.7 22.7 22.7 22.7 22.6 22.6 22.6 22.6 22.6 22.6 22.7 22.7 22.7 22.8 22.8 22.8 22.8 22.9 22.8 22.7 23.6