# Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Allegheny County, Continuous Opacity Monitor Regulation
> **Rule** · Direct final rule. · Published 2009-07-13 · Effective 2009-09-11 · 74 FR 33329
## Document
- **Document number:** E9-16365
- **Category:** air-emissions
- **Federal Register citation:** 74 FR 33329
- **CFR reference:** 40 CFR 52
- **Publication date:** 2009-07-13
- **Effective date:** 2009-09-11
- **State:** PA
- **EPA docket:** EPA-R03-OAR-2009-0352
## Abstract

EPA is taking direct final action to approve revisions to the Pennsylvania State Implementation Plan (SIP). This SIP revision, "Revision 58, Continuous Opacity Monitor Regulation Changes," consists of changes to the Allegheny County Health Department (ACHD) Rules and Regulations, Article XXI, Air Pollution Control. EPA is approving this revision to the Pennsylvania SIP in accordance with the requirements of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/07/13/E9-16365/approval-and-promulgation-of-air-quality-implementation-plans-pennsylvania-allegheny-county)
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