# Approval and Promulgation of State Implementation Plans: State of Washington; Central Puget Sound Carbon Monoxide and Ozone Second 10-Year Maintenance Plans
> **Rule** · Final rule. · Published 2004-08-05 · Effective 2004-09-07 · 69 FR 47365
## Document
- **Document number:** 04-17782
- **Category:** air-emissions
- **Federal Register citation:** 69 FR 47365
- **CFR reference:** 40 CFR 52
- **Publication date:** 2004-08-05
- **Effective date:** 2004-09-07
- **State:** WA
- **EPA docket:** Docket No. WA-04-001
## Abstract

In this action, the EPA is approving the Central Puget Sound carbon monoxide (CO) and Ozone Second 10-Year Maintenance Plans. Specifically EPA is approving Washington's demonstration that the Central Puget Sound area will maintain air quality standards for CO and ozone through the year 2016; a revised CO motor vehicle emissions budget for transportation conformity purposes using the MOBILE6.2 emissions model and latest growth and planning assumptions; updates and enhancements of state implementation plan (SIP) control measures and contingency measures; and identification of emissions associated with the Seattle Tacoma International Airport included in the area-wide emissions inventory through the maintenance period.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/08/05/04-17782/approval-and-promulgation-of-state-implementation-plans-state-of-washington-central-puget-sound)
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