Approval and Promulgation of Air Quality Implementation Plans; Maryland; Approval of an Alternative Volatile Organic Compound Emission Standard

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The Environmental Protection Agency (EPA) is taking direct final action to approve a revision to the State of Maryland's state implementation plan (SIP). Maryland requested EPA incorporate by reference into the Maryland SIP a Maryland Department of the Environment (MDE) order that establishes an alternative volatile organic compound (VOC) emission standard for National Gypsum Company (NGC) that will ensure that this source remains a minor stationary source of VOCs. EPA is approving the SIP submittal incorporating by reference MDE's order for NGC in accordance with the requirements of the Clean Air Act (CAA).