OKLAHOMA CARBON MONOXIDE
 Highest 8 Hour Averages as of 12/31/04
PPM
Site 1999 2000 2001 2002 2003 2004
  1st          2nd 1st          2nd 1st          2nd 1st          2nd 1st          2nd 1st          2nd
Tulsa 3.5            3.0 3.3           3.0 4.1          3.5 2.8         2.7 2.3          2.2 2.0     1.8
Site 191 11/11        1/17 11/28      11/3   1/6          11/16  8/27       8/26 2/12        2/13 1/23     1/22
             
Tulsa 3.9           3.5 3.8           3.7 5.5         4.1 3.2         2.9 3.1         2.4 Site Closed
Site 126 11/16     10/26 2/7        11/28  1/6        12/7  2/2        2/17 2/12       1/3  
             
OKC 4.6            4.2   4.2            4.1 4.2           3.4 3.3           2.7 3.4        2.8 2.4     2.1
Site 047  11/16      11/11    2/7          11/28 1/15        11/5 1/15       12/26 1/1        1/21 6/26   11/20
             
OKC 3.1           2.9 3.2           3.1 2.5           2.4 2.9           2.4 Site Closed Site Closed
Site 025 11/27      11/10 11/28       1/30 12/1        1/15  2/1        12/26    
             
Moore  2.7           2.2 2.8           1.9 1.7            1.5  1.9           1.7 1.4        1.4 Monitor Closed
Site 049 11/16      11/20 11/30      1/30 1/15         1/22 2/2         2/17 1/1        1/3  
             
Lawton 1.7           1.6  1.4           1.3 2.4          2.1 2.3          2.1 2.2       1.8 1.0      1.0
Site 647 4/4          1/11  12/15       12/7  1/4         12/2  12/15    12/14 1/4       1/8 1/22     4/8