2010 Ozone Scorecard – Tulsa Air Quality

Through 12/31/20102 Exceedance Days: July 26, August 27

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	CURRENT 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	0.069 5-May	0.069 24-Jun	0.067 3-Jun	0.067	0.067
0.069	0.066	0.067
An ozone exceedance = .076 ppm or greater Is our 2008-2010 Design Value currently meeting the ozone standard? Yes North monitor example (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
2010	28th	None	None	12th, 19th, 23rd, 28th	None	5
2009	None	24^th, 25^th, 26^th, 27^th, 30^th	1^st, 7^th, 11^th, 16^th	13^th, 25^th		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