Approval and Promulgation of State Implementation Plans; State of Colorado; Interstate Transport of Pollution Revisions for the 1997 8-Hour Ozone and 1997 PM2.5 NAAQS: “Interference With Visibility” Requirement
air-emissions · Rule · Published 2011-04-20 · Effective 2011-05-20 · CO · 76 FR 22036
Document
Document number
2011-9580
Federal Register citation
76 FR 22036
CFR reference
40 CFR 52
Type
Rule
Action
Final rule.
Category
air-emissions
Publication date
2011-04-20
Effective date
2011-05-20
State
CO
EPA docket
EPA-R08-OAR-2007-1036
Abstract
EPA is partially approving the Colorado Interstate Transport State Implementation Plan (SIP) revision, submitted on March 31, 2010, addressing the requirements of Clean Air Act (CAA) section 110(a)(2)(D)(i)(II) for the 1997 ozone National Ambient Air Quality Standards (NAAQS), and the requirements of CAA section 110(a)(2)(D)(i)(I) and (II) for the 1997 PM<INF>2.5</INF> NAAQS. Specifically, in this Federal Register action EPA is fully approving those portions of the Colorado March 31, 2010 submission that address the section 110(a)(2)(D)(i)(II) requirement prohibiting a state's emissions from interfering with any other state's required measures to protect visibility for the 1997 ozone and PM<INF>2.5</INF> NAAQS. This action is being taken under section 110 of the CAA.