2005 Ozone Scorecard – Tulsa Air Quality

6 Exceedance Days: June 21, June 22, July 29, August 8, Sept 1, Sept 2

Monitor Site					2005 8-Hr. Ozone Averages (1^st through 4^th highest readings) 4^th Highest at end of season is key reading, and is averaged with the 2003 and 2004 4^th highest readings An Ozone Exceedance = .085 or greater				Is Our Current 3-Yr. Average Meeting the Ozone Standard? Yes, if the 3-Yr Avg. (of 4^th Highest readings) is .084 or lower A Violation of the standard = .085 or greater
					1^st highest (date)	2^nd highest (date)	3^rd highest (date)	4^th Highest (date)	2002-2004 Avg. of 4^th Highs	CURRENT 3-YR AVG 2003 – 2005 Avg. of 4^th Highs	2005 4^th High Key Target (2005’s 4^th highest needs to be no higher than this number)
2002 4^th High	2003 4^th High		2004 4^th High

Central (#1127 Tulsa)					0.091 1-Sep	0.083 20-Jun	0.83 21-Jun	0.082 29-Jul	0.076	0.076	.106
0.080		0.080		0.068

NORTH (#137 Skiatook)					0.090 8-Aug	0.087 22-Jun	0.087 2-Sep	0.083 20-Jun	0.079	0.079	.100
0.083		0.083		0.071

South (#174 Glenpool)					0.085 29-Jul	0.077 14-Jul	0.073 30-Aug	0.072 20-May	0.079	0.076	.097
0.082		0.086		0.071

East (#178 Lynn Lane)					0.092 21-Jun	0.084 15-Jun	0.082 6-Aug	0.081 29-Jul	0.078	0.079	.097
0.080		0.084		0.073

West (#144 Mannford)					0.096 29-Jul	0.086 1-Sep	0.079 31-Aug	0.076 20-Jun	N.A.	0.076	.102
N.A.		0.081		0.071
An exceedance of the 8-hr ozone standard is .085 ppm or greater

Tulsa Area Ozone Alert! Days
Year	No. of Days
2005	13
2004	3
2003	8
2002	8
2001	8
2000	15
1999	17
1998	10

Explanation of the Ozone Standard

· The new revised national ozone standard is an eight-hour averaged standard and is calculated by averaging data over a three year time period. This average is taken from the fourth highest eight-hour average at each monitor. A violation occurs when the 3-year average (of the 4th highest value) is greater than .084 ppm. We currently meet the standard, as the current 3-hear average at each monitor is less than .085 ppm. The 3-year average (of the 4th highest values) is shown above in green.

· To determine an ozone violation, the following example calculation is used: North (Skiatook) monitor’s 2002 4th highest reading was .083, its 4th highest in 2003 was .083, the 2004 4th highest for that monitor is .071. Thus, .083 + .083 + .071 divided by 3 = .079 ppm, which meets the standard (the standard applies no rounding.)

· A violation of the Ozone Standard means that our entire Metropolitan Statistical Area of seven surrounding counties including Tulsa County would be eligible for the EPA “Dirty Air List” or Non-Attainment.