# Approval and Promulgation of Air Quality Implementation Plans; State of Colorado; Second Ten-Year Carbon Monoxide Maintenance Plan for Greeley
> **Rule** · Direct Final Rule. · Published 2013-08-02 · Effective 2013-10-01 · 78 FR 46816
## Document
- **Document number:** 2013-18439
- **Category:** air-emissions
- **Federal Register citation:** 78 FR 46816
- **CFR reference:** 40 CFR 52
- **Publication date:** 2013-08-02
- **Effective date:** 2013-10-01
- **State:** CO
- **EPA docket:** EPA-R08-OAR-2011-0658
## Abstract

EPA is taking direct final action approving a State Implementation Plan (SIP) revision submitted by the State of Colorado. On March 31, 2010, the Governor of Colorado's designee submitted to EPA a Clean Air Act (CAA) section 175A(b) second 10-year maintenance plan for the Greeley area for the carbon monoxide (CO) National Ambient Air Quality Standard (NAAQS). This limited maintenance plan (LMP) addresses maintenance of the CO NAAQS for a second 10-year period beyond the original redesignation. This action is being taken under sections 110 and 175A of the CAA.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/08/02/2013-18439/approval-and-promulgation-of-air-quality-implementation-plans-state-of-colorado-second-ten-year)
---
*AI Analytics · CC0 1.0*