Approval and Promulgation of Air Quality Implementation Plans; Colorado; Revisions to New Source Review Rules

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EPA is proposing to approve those revisions adopted by Colorado on April 16, 2004 to Regulation No. 3 (Stationary Source Permitting and Air Pollutant Emission Notice Requirements) that incorporate EPA's December 31, 2002 NSR Reforms. Colorado submitted the request for approval of these rule revisions into the State Implementation Plan (SIP) on July 11, 2005 and supplemented its request on October 25, 2005. At this time, EPA is proposing to approve only the portions of Colorado's revisions to Regulation Number 3 that relate to the prevention of significant deterioration (PSD) and non-attainment new source review (NSR) construction permit programs of the State of Colorado. Other revisions, renumberings, additions, or deletions to Regulation No. 3 made by Colorado as part of the April 16, 2004 final rulemaking will be acted on by EPA in a separate action. Colorado has a Federally approved New Source Review (NSR) program for new and modified sources impacting attainment and non-attainment areas in the State. On December 31, 2002, EPA published revisions to the federal Prevention of Significant Deterioration (PSD) and non-attainment NSR regulations. These revisions are commonly referred