Haw. Rev. Stat. § 342L-15: Public records; confidential information.

Reports and records submitted to the department by any person on the ownership, installation, or operation of underground storage tanks or tank systems shall be made available for inspection by the public during established office hours except as provided in this section. Upon a showing satisfactory to the department that public disclosure of records, reports, or information, or a particular part thereof, to which the department's representative has access to under this section would divulge information entitled to protection under chapter 92F, the department shall consider the information or a particular portion thereof to be confidential. No confidential information secured pursuant to this section by any official or employee of the department within the scope of and [course] of the official's or employee's employment in the prevention, control, or abatement of releases from underground storage tanks or tank systems, shall be disclosed by the official or employee with the following exception: the document or information may be disclosed to officers, employees, or authorized representatives of the State or of the United States, including county government entities, who have been charged with carrying out this chapter or Subtitle I of the federal Resource Conservation and Recovery Act, or when relevant in any proceeding under this chapter.