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EPA published the Final Rule for Approval and Promulgation of State Implementation Plan Revisions; Colorado; Attainment Demonstration for the 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area, and Approval of Related Revisions in the Federal Register, Vol. 83, No. 128, July 3, 2018.

Published: December 1, 2016