OKLAHOMA CARBON MONOXIDE
 Highest 8 Hour Averages Through 12/31/2008
PPM          
Site  2004 2005 2006 2007 2008
  1st          2nd 1st          2nd 1st          2nd 1st          2nd 1st          2nd
Tulsa 2.0     1.8 1.5     1.5 1.7     1.7 1.8     1.6 1.4      1.4
Site 191 1/23     1/22 1/25    1/26 12/6    12/7 2/22   12/5 12/6      12/7
           
Tulsa       2.18  1.80 1.42       1.26
Site 1127       1/26   1/3 1/27       1/12
           
OKC 2.4     2.1 2.4     2.0 2.1     1.9 2.3     2.1 Monitor Removed
Site 047 6/26   11/20 6/25    1/20 1/3     1/2 2/22     11/18  
           
OKC         1.1      1.0
Site 033         12/7        3/1
           
Lawton 1.0      1.0 1.0     0.9 Monitor Removed Site Closed Site Closed
Site 647 1/22     4/8 2/4    2/10