# Approval and Promulgation of State Implementation Plans; Washington
> **Rule** · Final rule. · Published 1997-01-27 · Effective 1997-03-28 · 62 FR 3800
## Document
- **Document number:** 97-1847
- **Category:** air-emissions
- **Federal Register citation:** 62 FR 3800
- **CFR reference:** 40 CFR 52
- **Publication date:** 1997-01-27
- **Effective date:** 1997-03-28
- **State:** WA
- **EPA docket:** WA7-1-5542
## Abstract

The Environmental Protection Agency (EPA) is approving portions of Washington State Implementation Plan revision submittals for particulate matter for the Spokane and Wallula, Washington, particulate matter nonattainment areas. EPA is also granting temporary waivers of the attainment date for both areas. This action extends the attainment date for particulate matter air pollution from December 31, 1994, to December 31, 1997, in both nonattainment areas. The granting of the temporary waivers will provide the Washington Department of Ecology (Ecology) time to complete technical evaluations of the anthropogenic and nonanthropogenic sources of windblown dust in the area. The purpose of the submitted revisions is to bring about the attainment of the national ambient air quality standards (NAAQS) for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM<INF>10). The implementation plans were submitted by Ecology to satisfy certain federal Clean Air Act requirements for an approvable moderate PM<INF>10 nonattainment area SIPs for Spokane and Wallula, Washington.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/01/27/97-1847/approval-and-promulgation-of-state-implementation-plans-washington)
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