Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes: Washington

Zusammenfassung

Environmental Protection Agency (EPA) approves the Thurston County, Washington PM-10 area maintenance plan and redesignation request from nonattainment to attainment as revisions to the Washington State Implementation Plan. PM-10 air pollution is suspended particulate matter with a diameter less than or equal to a nominal ten micrometers.