# Air Plan Approval; Tennessee; Revisions to the Continuous Opacity Monitoring System Requirements
> **Rule** · Final rule. · Published 2024-05-13 · Effective 2024-06-12 · 89 FR 41321
## Document
- **Document number:** 2024-09729
- **Category:** air-emissions
- **Federal Register citation:** 89 FR 41321
- **CFR reference:** 40 CFR 52
- **Publication date:** 2024-05-13
- **Effective date:** 2024-06-12
- **State:** TN
- **EPA docket:** EPA-R04-OAR-2023-0458
## Abstract

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of Tennessee through the Department of Environment and Conservation (TDEC), Division of Air Pollution Control, via a letter dated September 28, 2022. Specifically, EPA is finalizing the approval of a SIP revision which modifies the State's required monitoring standards by adding exemptions to opacity monitoring requirements. EPA is approving this revision pursuant to the Clean Air Act (CAA or Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/05/13/2024-09729/air-plan-approval-tennessee-revisions-to-the-continuous-opacity-monitoring-system-requirements)
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