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 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
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REGION 8
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1595 Wynkoop Street
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Denver, CO   80202-1129
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Phone 800-227-8917
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www.epa.gov/region8


Ref: 8ARD-QP

MEMORANDUM							

SUBJECT: 	Air Plan Disapproval; Wyoming; Interstate Transport of Air Pollution for the 2015          8-hour Ozone National Ambient Air Quality Standards

DATE:	May 23, 2022

FROM:	Ellen Schmitt, 	EPA, Region 8
		
TO: 		File					


There are two dockets supporting this action, EPA-R08-OAR-2022-0268 and EPA-HQ-OAR-2021-0663. Docket No. EPA-R08-OAR-2022-0268 contains information specific to Wyoming, including the notice of proposed rulemaking. Docket No. EPA-HQ-OAR-2021-0663 contains additional modeling files, emissions inventory files, technical support documents, and other relevant supporting documentation regarding interstate transport of emissions for the 2015 8-hour ozone NAAQS which are being used to support this action. All comments regarding information in either of these dockets are to be made in Docket No. EPA-R08-OAR-2022-0268.
