OKLAHOMA CARBON MONOXIDE
 Highest 8 Hour Averages as of 12/31/05
PPM
Site  2001 2002 2003 2004 2005
  1st          2nd 1st          2nd 1st          2nd 1st          2nd 1st          2nd
Tulsa 4.1          3.5 2.8         2.7 2.3          2.2 2.0     1.8 1.5     1.5
Site 191   1/6          11/16  8/27       8/26 2/12        2/13 1/23     1/22 1/25    1/26
           
Tulsa 5.5         4.1 3.2         2.9 3.1         2.4 Site Closed Site Closed
Site 126  1/6        12/7  2/2        2/17 2/12       1/3    
           
OKC 4.2           3.4 3.3           2.7 3.4        2.8 2.4     2.1 2.4     2.1
Site 047 1/15        11/5 1/15       12/26 1/1        1/21 6/26   11/20 6/25  12/13
           
OKC 2.5           2.4 2.9           2.4 Site Closed Site Closed Site Closed
Site 025 12/1        1/15  2/1        12/26    
           
Moore 1.7            1.5   1.9           1.7  1.4        1.4 Monitor Closed Monitor Closed
Site 049 1/15         1/22 2/2         2/17 1/1        1/3    
           
Lawton 2.4          2.1 2.3          2.1 2.2       1.8 1.0      1.0 1.0     0.9
Site 647  1/4         12/2  12/15    12/14 1/4       1/8 1/22     4/8 2/4    2/10