PM10 Limited Maintenance Plan

Spokane PM₁₀ Limited Maintenance Plan

Local air pollution control agencies periodically submit air quality plan updates and regulations to the Department of Ecology (Ecology) for inclusion in Washington’s State Implementation Plan (SIP). The SIP is a statewide plan for meeting federal health-based standards for certain air pollutants.

The Spokane area was designated nonattainment for particulate matter air pollution equal to or less than 10 microns in size (PM₁₀). This means that, in the past, the area did not meet federal health-based standards for PM₁₀. As the area has been meeting the standards since 1994, it has now be redesignated to attainment by the federal Environmental Protection Agency (EPA).

The Spokane County Air Pollution Control Agency and Ecology have prepared a plan, called a Limited Maintenance Plan, for PM₁₀. This plan demonstrates that the Spokane area meets Federal Clean Air Act requirements for PM₁₀. It also summarizes the progress of the area in attaining the PM₁₀ standard, demonstrates that the Spokane area qualifies for EPA’s Limited Maintenance Plan option, and includes a maintenance plan to assure continued attainment for ten years after the redesignation.

Copies of the plan are available for review at :

Spokane County Air Pollution Control Authority 1101 W. College., Suite 403 Spokane, WA 99201

The following documents are available for viewing online:

• Spokane PM₁₀ Limited Maintenance Plan
• Appendix A: Limited Maintenance Plan Qualification Asessement
• Appendix B: 2002 PM₁₀ Emission Inventory for the Spokane Nonattainment Area
• Appendix C: Draft Technical Analysis Protocol for the Spokane PM₁₀ Nonattainment Area PM₁₀ Limited Maintenance Plan and Redesignation Request
• Appendix D: Inventory Preparation Plan/Quality Assurance Plan for PM₁₀ and CO Inventories in the Spokane Nonattainment Areas