# Air Plan Approval; Washington; Wallula Second 10-Year Maintenance Plan
> **Rule** · Final rule. · Published 2020-05-01 · Effective 2020-06-01 · 85 FR 25303
## Document
- **Document number:** 2020-08123
- **Category:** air-emissions
- **Federal Register citation:** 85 FR 25303
- **CFR reference:** 40 CFR 52
- **Publication date:** 2020-05-01
- **Effective date:** 2020-06-01
- **State:** WA
- **EPA docket:** EPA-R10-OAR-2019-0669, FRL-10007-28-Region 10
## Abstract

The Environmental Protection Agency (EPA) is approving a plan for the Wallula area in Washington State that addresses the second 10- year maintenance period for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM<INF>10</INF>). This plan relies upon the control measures contained in the first 10-year maintenance plan, with revisions to reflect updated permits and agreements, also approved in this action. Concurrently, we are taking final agency action on high wind and wildfire exceptional events associated with the Wallula area.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/05/01/2020-08123/air-plan-approval-washington-wallula-second-10-year-maintenance-plan)
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