Environmental Protection Agency

Final Rule To Implement the 1997 8-Hour Ozone National Ambient Air Quality Standard: Classification of Areas That Were Initially Classified Under Subpart 1; Revision of the Anti-Backsliding Provisions To Address 1-Hour Contingency Measure Requirements; Deletion of Obsolete 1-Hour Ozone Standard Provision

July 25, 2012 - 77 FR 43521 - RIN: 2060-AO96 - Download Full Notice: Text | PDF

This rule is final.


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