# Approval and Promulgation of Implementation Plans; Arizona State Implementation Plan Revision, Maricopa County Environmental Services Department
> **Rule** · Final rule. · Published 1998-05-04 · 63 FR 24434
## Document
- **Document number:** 98-11759
- **Category:** air-emissions
- **Federal Register citation:** 63 FR 24434
- **CFR reference:** 40 CFR 52
- **Publication date:** 1998-05-04
- **State:** AZ
- **EPA docket:** AZ059-0005
## Abstract

EPA is taking final action to approve a revision to the Arizona State Implementation Plan (SIP). The revision concerns Maricopa County's Ordinance P-7, Maricopa County Trip Reduction Ordinance. This approval action will incorporate this ordinance into the federally- approved SIP. The intended effect of approving this ordinance is to reduce emissions of volatile organic compounds, nitrogen oxides, carbon monoxide, and particulate matter by reducing the number of single- occupant-vehicle commute trips in the Phoenix, Arizona, metropolitan area. EPA is finalizing the approval of this revision into the Arizona SIP under provisions of the CAA regarding EPA action on SIP submittals, SIPs for national primary and secondary ambient air quality standards and plan requirements for nonattainment areas.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/05/04/98-11759/approval-and-promulgation-of-implementation-plans-arizona-state-implementation-plan-revision)
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