Approval and Promulgation of Air Quality Implementation Plans; Maryland; Administrative Revisions of General Provisions Related to Definitions of Terms and Ambient Air Quality Standards
EPA is taking direct final action to approve revisions to the Maryland State Implementation Plan (SIP). In this action, EPA is approving revisions which reorganize the structure of the general administrative provisions describing definitions of terms used throughout Maryland's air pollution control regulations, amend the definition of the term "source," and reorganize the provisions governing ambient air quality standards. EPA is approving these revisions to in accordance with the requirements of the Clean Air Act.