Score Card

2010 END OF SEASON OZONE SCORECARD

2010 Tulsa Area Ozone Highest 8-Hr Averages*

Last Updated: 10/18/10 9:00 AMExceedance Days: 7/26/10; 8/27/10

Monitor Site			2010 Highest 8-Hr Ozone Averages (ppm) (1^st through 4^th highest readings)				DESIGN VALUE 3-Year Average of the 4^th highest readings
2007 4^th High	2008 4^th High	2009 4^th High	1^st Highest date	2^nd Highest date	3^rd Highest date	4^th Highest date	07-09 Avg	FINAL 2008-2010 Avg
West (#144 Mannford)			0.074 6-Aug	0.071 17-Oct	0.069 1-Jul	0.069 23-Aug	0.071	0.070
0.71	0.069	0.074
East (#178 Lynn Lane)			0.072 17-Oct	0.071 19-Aug	0.071 23-Aug	0.071 27-Aug	0.072	0.070
0.075	0.069	0.072
Central (#1127 Tulsa)			0.073 26-Jul	0.072 19-Aug	0.072 27-Aug	0.070 28-Aug	0.071	0.070
0.072	0.069	0.072
North (#137 Skiatook)			0.078 26-Jul	0.077 27-Aug	0.074 19-Aug	0.073 23-Aug	0.075	0.075
0.073	0.079	0.073
South (#174 Glenpool)			0.072 26-May	0.070 22-Aug	0.069 5-May	0.069 24-Jun	0.067	0.067
0.069	0.066	0.067
An ozone exceedance = .076 ppm or greater Is our 2008-2010 Design Value meeting the ozone standard? Yes The standard uses the ozone monitor with the highest Design Value. The Design Value is the monitor with the highest ozone data (4th highest value), averaged over a rolling 3-year average. Thus, our current ozone Design Value is the average of 2008's 4th high value + 2009's + 2010's 4th high (with no rounding) North monitor: (0.079 + 0.073 + 0.073) / 3 = 0.075 ppm Does our 2007-2009 Design Value meet the ozone standard? YES

*2010 data is preliminary and subject to change as a result of the ODEQ/EPA verification process

Explaining the Ozone Standard Averages

· EPA's National Ambient Air Quality Standard (NAAQS) for Ozone is 0.075 parts per million (ppm)

· The Ozone Standard is calculated by averaging data over a three year time period. This average is taken from the fourth highest (8-hr average) at each monitor. A violation occurs when the 3-year average is greater than 0.075 ppm.

· The monitor with the highest 3-year average defines an area’s ‘Design Value’.

Tulsa Area Ozone Alert! Days (2000 - present)
Year	May	June	July	August	September	Alert! Days
2011
2010	28th			12^th, 19^th,23^rd , 28th		5
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
2002	None	24^th, 25^th	9^th, 10^th, 25^th	6^th, 9^th, 31^st	None	8
2001	None	26^th	11^th, 25^th	3^rd, 4^th, 6^th, 7^th	14^th	8
2000	None	None	17^th	1^st, 2^nd, 3^rd, 4^th, 15^th, 16^th, 23^rd, 24^th, 25^th, 26^th	2^nd, 3^rd, 4^th, 8^th	15