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Summary of Seattle-Tacoma Puget Sound Area 2nd 10-Year Ozone Maintenance Plan

Related Information
  • Washington SIP: EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures (40 CFR part 52.2470(e))

Background

The Seattle-Tacoma Puget Sound Area was redesignated attainment for ozone on November 25, 1996.

Washington submitted an ozone maintenance plan on January 28, 1993, and EPA approved the plan on September 26, 1996 (61 FR 50438 (pdf) (6 pp, 189 KB)).

Washington submitted a second 10-year CO/ozone maintenance plan on December 17, 2003, and EPA announced its proposed approval of the plan on June 1, 2004 (69 FR 30847 (pdf) (6 pp, 164 KB)).

On August 5, 2004, EPA approved the Central Puget Sound Area 2nd 10-year CO/ozone maintenance plan (69 FR 47365 (pdf) (2 pp, 143 KB)).

Summary

The plan relies on control strategies needed to assure attainment of the National Ambient Air Quality Standards (NAAQS) for ozone. The strategy focuses on vehicle Inspection and Maintenance Program in conjunction with the Federal Motor Vehicle Emissions Improvement Program.

Rules

  • WAC 173-422, Motor Vehicle Emission Inspection
  • PSCAA Regulation II

Contingency Measures

  • PSCAA Regulation I, Section 8.06, Outdoor Burning Ozone Contingency Measure
  • PSCAA Regulation II, Section 2.09, Oxygenated Gasoline Carbon Monoxide Contingency Measures and Fee Schedule
  • PSCAA Regulation II, Section 2.10, Gasoline Station Ozone Contingency Measure

EPA Effective Date

September 7, 2004

Air Quality Implementation Plans

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Last updated on April 17, 2025
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