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

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Environmental Protection Agency proposes to approve 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. In the Final Rules section of this Federal Register, the EPA is approving the State's SIP submittal as a direct final rule without prior proposal because the Agency views this as a noncontroversial submittal amendment and anticipates no adverse comments. A detailed rationale for the approval is set forth in the direct final rule. If no adverse comments are received in response to this action, no further activity is contemplated. If the EPA receives adverse comments, the direct final rule will be withdrawn and all public comments received will be addressed in a subsequent final rule based on this proposed rule. The EPA will not institute a second comment period. Any parties interested in commenting on this action should do so at this time.