Section 52.1778 - Significant deterioration of air quality(c) All applications and other information required pursuant to § 52.21 from sources located in the State of North Carolina shall be submitted to the appropriate state or local agency for which the source is located, rather than to EPA's Region 4 office: North Carolina Department of Environmental Quality, Division of Air Quality, 1641 Mail Service Center, Raleigh, North Carolina 27699-1641; Forsyth County Office of Environmental Assistance and Protection, 201 North Chestnut Street, Winston-Salem, North Carolina 27101-4120; Mecklenburg County Land Use and Environmental Services Agency, Air Quality, 2145 Suttle Avenue, Charlotte, North Carolina 28208; or Western North Carolina Regional Air Quality Agency, 125 S. Lexington Ave., Suite 101, Asheville, North Carolina 28801-3661.43 FR 26410, June 19, 1978, as amended at 47 FR 7837, Feb. 23, 1982; 74 FR 55143 , Oct. 27, 2009; 77 FR 23398 , Apr. 19, 2012; 79 FR 30051 , May 27, 2014; 82 FR 32645 , July 17, 2017