OKLAHOMA CARBON MONOXIDE
Highest 8 Hour Averages as of 12/31/06
PPM
Site	2002	2003	2004	2005	2006
	1st          2nd	1st          2nd	1st          2nd	1st          2nd	1st          2nd
Tulsa	2.8         2.7	2.3          2.2	2.0     1.8	1.5     1.5	1.7     1.7
Site 191	8/27       8/26	2/12        2/13	1/23     1/22	1/25    1/26	12/6    12/7
Tulsa	3.2         2.9	3.1         2.4	Site Closed	Site Closed	Site Closed
Site 126	2/2        2/17	2/12       1/3
OKC	3.3           2.7	3.4        2.8	2.4     2.1	2.4     2.0	2.1     1.9
Site 047	1/15       12/26	1/1        1/21	6/26   11/20	6/25    1/20	1/03    1/02
OKC	2.9           2.4	Site Closed	Site Closed	Site Closed	Site Closed
Site 025	2/1        12/26
Moore	1.9           1.7	1.4        1.4	Monitor Closed	Monitor Closed	Monitor Closed
Site 049	2/2         2/17	1/1        1/3
Lawton	2.3          2.1	2.2       1.8	1.0      1.0	1.0     0.9	Monitor Closed
Site 647	12/15    12/14	1/4       1/8	1/22     4/8	2/4    2/10