Information obtained by the commission concerning environmental protection including but not limited to information contained in applications for air emission equipment construction permits and water discharge permits shall be public information and shall be made available upon proper request. Other information obtained by the commission, department or permit board in the administration of Sections 49-17-1 through 49-17-43 concerning trade secrets, including, but not limited to, marketing or financial information, processes, devices, methods of manufacture, or production capabilities or amounts shall be kept confidential, if and only if: (a) a written confidentiality claim is made when the information is supplied; (b) such confidentiality claim allows disclosure of the confidential information to authorized department employees and/or the United States Environmental Protection Agency (EPA); and (c) such confidentiality claim is determined by the commission to be valid. If the confidentiality claim is denied, the information sought to be covered thereby shall not be released or disclosed, except to the Environmental Protection Agency, until the claimant has been notified in writing and afforded an opportunity for a hearing and appeal therefrom, as with other orders of the commission. Disclosure of confidential information by the EPA should be governed by federal law and EPA regulations. Anyone making unauthorized disclosure of information determined to be confidential as herein provided shall be liable in a civil action for damages arising therefrom and shall also be guilty of a misdemeanor punishable as provided by law.