Analysis of Contribution Thresholds for Use in Clean Air Act Section 110(a)(2)(D)(i)(I) Interstate Transport State Implementation Plan Submissions for the 2015 Ozone National Ambient Air Quality Standards.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Analysis of Contribution Thresholds Memo (PDF)(8 pp, 2 MB)