# Clean Air Act Approval and Promulgation of Air Quality Implementation Plan; Montana; East Helena Lead State Implementation Plan
> **Rule** · Direct final rule. · Published 2001-06-18 · Effective 2001-08-17 · 66 FR 32767
## Document
- **Document number:** 01-15143
- **Category:** air-emissions
- **Federal Register citation:** 66 FR 32767
- **CFR reference:** 40 CFR 52
- **Publication date:** 2001-06-18
- **Effective date:** 2001-08-17
- **State:** MT
- **EPA docket:** SIP NO. MT-001-0030a
## Abstract

The EPA is taking direct final action approving revisions to the East Helena Lead (Pb) State Implementation Plan (SIP) submitted by the Government of Montana on November 27, 2000. The revisions make minor modifications to Asarco's control strategy in the Pb SIP. The intended effect of this action is to make the revisions federally enforceable. The EPA is taking this action under sections 110 and 301 of the Clean Air Act (Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/06/18/01-15143/clean-air-act-approval-and-promulgation-of-air-quality-implementation-plan-montana-east-helena-lead)
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