# Approval and Promulgation of Implementation Plans; Arizona Maricopa Nonattainment Area; PM-10
> **Rule** · Final rule. · Published 1999-06-29 · Effective 1999-07-29 · 64 FR 34726
## Document
- **Document number:** 99-16371
- **Category:** air-emissions
- **Federal Register citation:** 64 FR 34726
- **CFR reference:** 40 CFR 52
- **Publication date:** 1999-06-29
- **Effective date:** 1999-07-29
- **State:** AZ
- **EPA docket:** AZ079-0014
## Abstract

EPA is approving under the Clean Air Act (CAA or Act) a revision to the Arizona State Implementation Plan (SIP) reflecting Arizona State legislation that provides for the expeditious implementation of best management practices to reduce fugitive dust from agricultural sources in the Maricopa County (Phoenix) PM-10 nonattainment area. Because EPA is approving the State legislation as meeting the reasonably available control measure (RACM) requirements of the Act, EPA is also withdrawing a federal implementation plan (FIP) commitment, promulgated under section 110(c) of the Act, to adopt and implement RACM for agricultural fields and aprons in the Maricopa area.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/06/29/99-16371/approval-and-promulgation-of-implementation-plans-arizona-maricopa-nonattainment-area-pm-10)
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