Haw. Rev. Stat. § 342B-41
The director, in accordance with the law, may enter and inspect any building or place to investigate an actual or suspected source of air pollution, to ascertain compliance or noncompliance with this chapter or any rule or standard adopted by the department pursuant to this chapter, or any permit or other approval granted by the department pursuant to this chapter, and to make reasonable tests in connection therewith. No confidential information secured pursuant to this section by any official or employee of the department within the scope and course of the official's or employee's employment in the prevention, control, or abatement of air pollution shall be disclosed by the official or employee except as it relates directly to air pollution and then only in connection with the official's or employee's official duties and within the scope and course of the official's or employee's employment.
HRS § 342B-41