ENVIRONMENTAL PROTECTION AGENCY ISSUES PROPOSED RULE: AIR PLAN APPROVAL; MONTANA; REGIONAL HAZE PLAN FOR THE SECOND IMPLEMENTATION PERIOD; PRONG 4 (VISIBILITY) FOR THE 2015 8-HOUR OZONE NATIONAL AMBIENT AIR QUALITY STANDARD

WASHINGTON, Sept. 11 -- Environmental Protection Agency has issued a proposed rule called: Air Plan Approval; Montana; Regional Haze Plan for the Second Implementation Period; Prong 4 (Visibility) for the 2015 8-Hour Ozone National Ambient Air Quality Standard.

The proposed rule was published in the Federal Register on Sept. 11 by Cyrus M. Western, Regional Administrator, Region 8.

Summary: The Environmental Protection Agency (EPA) is proposing to approve the regional haze state implementation plan (SIP) submission submitted by the State of Montana on August 10, 2022, under the Clean Air Act (CAA) and the EPA's Regional Haze Rule (RHR) for the program's second implementation period. Montana's 2022 SIP submission addresses the requirement ...