# Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Revised Visible Emissions Rules for Allegheny County Pertaining to Blast Furnace Slips
> **Rule** · Direct final rule. · Published 1996-10-22 · Effective 1996-10-22 · 61 FR 54736
## Document
- **Document number:** 96-27001
- **Category:** air-emissions
- **Federal Register citation:** 61 FR 54736
- **CFR reference:** 40 CFR 52
- **Publication date:** 1996-10-22
- **Effective date:** 1996-10-22
- **State:** PA
- **EPA docket:** PA097-4030
## Abstract

Pursuant to Agency procedures for approving minor State Implementation Plan (SIP) revisions, this action identifies a plan revision submitted by Pennsylvania on behalf of Allegheny County which EPA approved and incorporates the relevant material into the Code of Federal Regulations. This revision deletes the exemption of blast furnace slips from Allegheny County's visible emissions regulations. This action lists the SIP revision that EPA has approved and incorporates the relevant material into the code of Federal Regulations. This action is being taken under section 110 of the Clean Air Act.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1996/10/22/96-27001/approval-and-promulgation-of-air-quality-implementation-plans-pennsylvania-revised-visible-emissions)
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