Fairbanks - Carbon Monoxide

Background
The urban portion of the Fairbanks North Star Borough (FNSB) was designated in 1990 as a nonattainment area for carbon monoxide (CO).

A new plan was submitted on August 30, 2001, and EPA approved the plan on February 4, 2002 (67 FR 5064 (PDF)(6 pp, 151 K).

The State of Alaska submitted a maintenance plan and redesignation request on June 21, 2004. EPA approved (69 FR 44601 (PDF)(7 pp, 166 K) the plan and redesignation to attainment on July 27, 2004.

The State submitted three revisions to the Alaska SIP relating to the motor vehicle inspection and maintenance program in Fairbanks:

A March 29, 2002, submittal containing minor revisions to the statewide I/M program.
A December 11, 2006, submittal containing more substantial revisions to the statewide I/M program.
A June 5, 2008, submittal containing major revisions to the statewide I/M program discontinuing the I/M program in Fairbanks as an active control measure in the SIP and shifting it to a contingency measure.

EPA approved the revisions on March 22, 2010 (75 FR 13436 (PDF)(6 pp, 159 K).

On April 22, 2013, the State of Alaska submitted the Second 10-Year Limited Maintenance Plan (LMP) for the Fairbanks, Alaska CO area. The area qualified for an LMP because the second highest 8-hour CO concentration for the Fairbanks area for the most recent 8 quarters (2011-2012) was 3.6 ppm, which is significantly below the LMP Option requirement of 7.65 ppm.

The EPA approved the LMP on August 9, 2013 (78 FR 48611 (PDF)(5 pp, 264 K).

Source: United States Environmental Protection Agency.