Approval and Promulgation of Air Quality Implementation Plans; Maine, and Redesignation of Hancock and Waldo Counties; Maine

EPA is approving two requests from the State of Maine: approval of the Maine 1990 base year inventory into the Maine State Implementation Plan (SIP), referred to as the SIP revision; and a redesignation request by the State of Maine for the Hancock and Waldo counties marginal nonattainment area, referred to as the redesignation request. These actions are being taken in accordance with the Clean Air Act (CAA or the Act). The first request will establish the 1990 base year ozone emission inventories of volatile organic compounds (VOC) and oxides of nitrogen (NOx) emissions for the classified ozone nonattainment areas in Maine. The second request will redesignate the Hancock and Waldo counties marginal ozone nonattainment area from nonattainment to attainment. The second request also contains a 1993 attainment emissions inventory that will satisfy Hancock and Waldo counties requirement for a 1993 periodic inventory. A detailed rationale for the two approvals is set forth in SUPPLEMENTARY INFORMATION.