2009 Ozone Scorecard – Tulsa Air Quality

Monitor			2009 Highest 8-Hr Ozone Averages (ppm) (1^st through 4^th highest readings)				DESIGN VALUE 3-Year Average of the 4^th highest readings
2006 4^th High	2007 4^th High	2008 4^th High	1^st Highest date	2^nd Highest date	3^rd Highest date	4^th Highest date	2006-2008 Design Value	2007-2009 FINAL Design Value

West (#144 Mannford)			0.083 24-Jun	0.081 12-Aug	0.075 5-Aug	0.074 8-Apr	0.075	0.071
0.085	0.071	0.069
East (#178 Lynn Lane)			0.083 26-Jun	0.083 15-Jul	0.074 13-Jul	0.072 5-Jul	0.076	0.072
0.084	0.075	0.069
Central (#1127 Tulsa)			0.094 24-Jun	0.078 26-Jun	0.078 2-Jul	0.072 2-Aug	0.074	0.071
0.081	0.072	0.069
North (#137 Skiatook)			0.077 22-Apr	0.077 24-Jun	0.075 26-Jun	0.073 2-Jul	0.078	0.075
0.084	0.073	0.079
South (#174 Glenpool)			0.075 1-Jul	0.069 8-Apr	0.069 30-Jun	0.067 18-Mar	0.071	0.067
0.078	0.069	0.066
An ozone exceedance = .076 ppm or greater *6 Exceedance Days in 2009: April 22, June 24, June 26, July 2, July 15, Aug 12* Is our 2007-2009 Ozone Design Value meeting the standard? YES! The Standard uses the ozone monitor with the highest Design Value . The Design Value is the highest of each monitor’s unique ozone data <4^th highest value>, averaged over a rolling 3-yr average, with the oldest year dropping off. Thus, our current year’s ozone Design Value is the 2007’s 4^th high value + 2008’s 4^th high + 2009’s 4^th high averaged (with no rounding). How to Calculate the EPA Ozone Standard (North monitor example): = .073 + .079 + .073 ÷ 3 = 0.075 ppm (no rounding) A VIOLATION of the EPA Ozone Standard occurs when any monitor’s Design Value is greater or equal to .076 ppm. We are not in violation of the standard!

Tulsa Area Ozone Alert! Days since 2003
Year	May	June	July	August	September	Alert! Days
2009		24^th, 25^th, 26^th, 27^th, 30^th	1^st, 7^th, 11^th, 16^th	13th, 25th		11
2008	None	None	18^th, 28^th, 31^st	1^st, 2^nd, 4^th,5^th,26^th	None	8
2007	None	None	None	2^nd, 3^rd, 14^th, 15^th, 16^th	None	5
2006	25^th	12^th, 15^th, 29^th, 30^th	1^st, 2^nd, 17^th, 19^th, 20^th, 21^st	24^th	None	12
2005	None	21^st, 22^nd, 24^th, 25^th, 26^th	30^th	1^st, 2^nd, 4^th, 10^th	3^rd, 4^th, 5^th	13
2004	None	None	15^th, 21^st, 22^nd	None	None	3
2003	None	None	2^nd, 3^rd, 30^th	6^th, 7^th, 23^rd, 26^th, 27^th	None	8