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Areas With the 1-hour Standard Revoked April 15, 2009 or November 20, 2008

Detailed Description of Certain Area Boundaries for Partial Counties
As of June 15, 2005


COLORADO


Denver-Boulder-Greeley-Ft Collins-Love., CO *

* Based on air quality data from 2005, 2006 and the first three quarters of 2007, the Denver CO Subpart 1 EAC area was designated nonattainment for 8-hour Ozone, effective November 20, 2007 ( 72 FR 53952).


Larimer Co

(Includes part of Rocky Mtn National Park) That portion of the county that lies south of a line described as follows: Beginning at a point on Larimer County's eastern boundary and Weld County's western boundary intersected by 40 degrees, 42 minutes, and 47.1 seconds north latitude, proceed west to a point defined by the intersection of 40 degrees, 42 minutes, 47.1 seconds north latitude and 105 degrees, 29 minutes, and 40.0 seconds west longitude, thence proceed south on 105 degrees, 29 minutes, 40.0 seconds west longitude to the intersection with 40 degrees, 33 minutes and 17.4 seconds north latitude, thence proceed west on 40 degrees, 33 minutes, 17.4 seconds north latitude until this line intersects Larimer County's western boundary and Grand County's eastern boundary.


Weld Co

That portion of the county that lies south of a line described as follows: Beginning at a point on Weld County's eastern boundary and Logan County's western boundary intersected by 40 degrees, 42 minutes, 47.1 seconds north latitude, proceed west on 40 degrees, 42 minutes, 47.1 seconds north latitude until this line intersects Weld County's western boundary and Larimer County's eastern boundary.


SOUTH CAROLINA


Columbia, SC
Lexington Co

Portion within the Columbia Metropolitan Planning Organization (MPO) boundary


Richland Co

Portion along MPO lines


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