# Approval and Promulgation of Air Quality Implementation Plans; North Carolina; Attainment Demonstration of the Mountain, Unifour, Triad and Fayetteville Early Action Compact Areas
> **Rule** · Final rule. · Published 2005-08-22 · Effective 2005-09-21 · 70 FR 48874
## Document
- **Document number:** 05-16596
- **Category:** air-emissions
- **Federal Register citation:** 70 FR 48874
- **CFR reference:** 40 CFR 52
- **Publication date:** 2005-08-22
- **Effective date:** 2005-09-21
- **State:** NC
- **EPA docket:** R04-OAR-2004-NC-0005-200513, FRL-7956-8
## Abstract

The EPA is approving revisions to the State Implementation Plan (SIP) submitted by the State of North Carolina, through the Department of Environment and Natural Resources (DENR) on December 21, 2004, for the four Early Action Compact (EAC) areas in North Carolina: the Mountain, Unifour, Triad and Fayetteville areas (the North Carolina EAC Areas). The SIP revisions meet the requirements for the North Carolina EAC Areas to attain and maintain the 8-hour ozone national ambient air quality standard (the 8-hour ozone standard) as described in the EAC Protocol and related regulations. EPA is also now approving the photochemical modeling used by North Carolina to support the attainment and maintenance demonstration of the 8-hour ozone standard in the North Carolina EAC Areas. In this action, EPA is not finalizing its proposed rulemaking to defer the effective date of the nonattainment designations for EAC areas. In a separate action, published on June 8, 2005, EPA proposed to defer the effective date of the nonattainment deferred designation for EAC areas until December 31, 2006 (69 FR 23858). EPA final action on the deferral is expected to be published before September 30, 2005.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/08/22/05-16596/approval-and-promulgation-of-air-quality-implementation-plans-north-carolina-attainment)
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