# Approval and Promulgation of Implementation Plans: Oregon
> **Rule** · Direct final rule. · Published 1999-03-15 · Effective 1999-05-14 · 64 FR 12751
## Document
- **Document number:** 99-6259
- **Category:** air-emissions
- **Federal Register citation:** 64 FR 12751
- **CFR reference:** 40 CFR 52
- **Publication date:** 1999-03-15
- **Effective date:** 1999-05-14
- **State:** OR
- **EPA docket:** OR-61-7276
## Abstract

Environmental Protection Agency (EPA) approves the State implementation plan (SIP) revision submitted by the State of Oregon for the purpose of bringing about the attainment of the national ambient air quality standard (NAAQS) for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM-10). The implementation plan was submitted by the State to satisfy certain Federal requirements for an approvable moderate nonattainment area PM- 10 SIP for the Oakridge, Oregon, PM-10 nonattainment area. The rationale for the approval is set out both in this action and in supporting technical information which is available at the address indicated. The final action to approve this plan would have the effect of making requirements adopted by the State of Oregon, federally enforceable by EPA.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/03/15/99-6259/approval-and-promulgation-of-implementation-plans-oregon)
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