Carbon Monoxide Federal Register Notice
Changes to a Higher Classification

Ordered by Current Classification
As of November 13, 2009

SERIOUS

Anchorage, AK
Reclassify from Moderate > 12.7 ppm to Serious
Proposed Approval	12/02/1997	62 FR Page 63687
Final Approval	06/12/1998	63 FR Page 32128	Effective: 07/13/1998

Denver-Boulder, CO
Reclassify from Moderate > 12.7 ppm to Serious
Proposed Approval	07/09/1996	61 FR Page 36004
Final Approval	03/10/1997	62 FR Page 10690	Effective: 04/09/1997

Fairbanks, AK
Reclassify from Moderate <= 12.7 ppm to Serious
Proposed Approval	08/08/1997	62 FR Page 42717

Fairbanks, AK
Reclassify from Moderate > 12.7 ppm to Serious
Final Approval	02/27/1998	63 FR Page 9945	Effective: 03/30/1998

Las Vegas, NV
Reclassify from Moderate > 12.7 ppm to Serious
Proposed Approval	06/26/1997	62 FR Page 34419
Final Approval	10/02/1997	62 FR Page 51604	Effective: 11/03/1997

Phoenix, AZ
Reclassify from Moderate <= 12.7ppm to Serious.
Proposed Approval	05/10/1996	61 FR Page 21415
Final Approval	07/29/1996	61 FR Page 39343	Effective: 08/28/1996

Spokane, WA
Reclassify from Moderate > 12.7 ppm to Serious
Proposed Approval	07/01/1996	61 FR Page 33879
Final Approval	03/12/1998	63 FR Page 12007	Effective: 04/13/1998