The board shall establish procedures to ensure that information supplied to the department, as provided by this part, and defined as proprietary by regulation, is not revealed to any person without the consent of the person supplying such information. Proprietary information does not include the name and address of permit applicants. Proprietary information may be utilized by the commissioner, the board, the department, the United States environmental protection agency (EPA), or any authorized representative of the commissioner or the board in connection with the responsibilities of the department or board pursuant to this part or as necessary to comply with federal law. The court may assess against the department reasonable attorney fees and other litigation costs reasonably incurred in any case under this section in which the complainant has substantially prevailed.