Information received by the department or any employees of the department through filed reports, inspections, or as otherwise authorized in this subchapter II or chapter 459, subchapter II, concerning trade secrets, secret industrial processes, or other privileged communications, except emission data, shall not be disclosed or opened to public inspection, except as may be necessary in a proceeding concerning a violation of this subchapter II or chapter 459, subchapter II, or of any rules promulgated under this subchapter II or chapter 459, subchapter II, or as otherwise authorized or ordered by appropriate court action or proceedings. Nothing in this section shall be construed to prevent the director from compiling or publishing analyses or summaries relating to the general condition of the atmosphere; provided that such analyses or summaries do not reveal any information otherwise confidential under this section.