# Approval and Promulgation of Implementation Plans; Kentucky; Redesignation of the Boyd County SO2 Nonattainment Area
> **Rule** · Direct final rule. · Published 2006-05-24 · Effective 2006-07-24 · 71 FR 29786
## Document
- **Document number:** 06-4820
- **Category:** air-emissions
- **Federal Register citation:** 71 FR 29786
- **CFR reference:** 40 CFR 52
- **Publication date:** 2006-05-24
- **Effective date:** 2006-07-24
- **State:** KY
- **EPA docket:** R04-OAR-2005-KY-0002-200531(a)
## Abstract

On May 13, 2005, and later clarified in a July 12, 2005, supplemental submittal, the Commonwealth of Kentucky submitted a request to redesignate the sulfur dioxide (SO<INF>2</INF>) nonattainment area of Boyd County to attainment of the National Ambient Air Quality Standards (NAAQS) for SO<INF>2</INF>. Boyd County is located within the Huntington-Ashland, West Virginia (WV)-Kentucky (KY)-Ohio (OH) Metropolitan Statistical Area (MSA), and the Boyd County SO<INF>2</INF> nonattainment area is comprised of the southern portion of Boyd County. The Commonwealth also submitted, as revisions to the Kentucky State Implementation Plan (SIP), a maintenance plan for the area and a source-specific SIP revision for the Calgon Carbon Corporation facility in Catlettsburg, Kentucky. EPA is approving the redesignation request for the Boyd County SO<INF>2</INF> nonattainment area and the maintenance plan for this area. The maintenance plan provides for the maintenance of the SO<INF>2</INF> NAAQS in Boyd County for the next ten years. EPA is also approving the source-specific SIP revision for the Calgon Carbon Corporation facility.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/05/24/06-4820/approval-and-promulgation-of-implementation-plans-kentucky-redesignation-of-the-boyd-county-so2)
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