N.C. Gen. Stat. § 74-88
If a person engaged in uranium exploration shows to the satisfaction of the Department that logs, surveys plats, and reports filed under this Article are of a proprietary nature relating to his competitive rights, that information shall be confidential and not subject to inspection and examination (as authorized by G.S. 132-6) for four years after receipt of the information by the Department. Further, upon written request of any such person, and a showing of a continued proprietary interest affecting competitive rights, the Department shall hold the material confidential for additional two-year periods. Nothing in this section shall be construed to deny the North Carolina Geological Survey access to all logs, plats, and reports filed under this Chapter. The North Carolina Geological Survey shall be bound to hold this information confidential to the same extent that the Department is bound.
N.C. Gen. Stat. § 74-88