# Approval and Promulgation of Air Quality Implementation Plans; Colorado; Revisions to Regulation Number 1
> **Rule** · Direct final rule. · Published 2010-05-10 · Effective 2010-07-09 · 75 FR 25772
## Document
- **Document number:** 2010-10568
- **Category:** air-emissions
- **Federal Register citation:** 75 FR 25772
- **CFR reference:** 40 CFR 52
- **Publication date:** 2010-05-10
- **Effective date:** 2010-07-09
- **State:** CO
- **EPA docket:** EPA-R08-OAR-2009-0790
## Abstract

EPA is taking direct final action approving State Implementation Plan revisions submitted by the State of Colorado on August 3, 2007 to Colorado's Regulation Number 1 (revisions to the performance testing requirements for air curtain destructors). Colorado adopted these rule revisions on October 2, 2006. All other actions submitted by the State of Colorado concurrent with Colorado's Regulation Number 1 revision request will be acted on at a later date. This action is being taken under section 110 of the Clean Air Act.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/05/10/2010-10568/approval-and-promulgation-of-air-quality-implementation-plans-colorado-revisions-to-regulation)
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