Haw. Rev. Stat. § 342F-6
The director, in accordance with law, may enter and inspect any building or place to investigate an actual or suspected source of excessive noise, to ascertain compliance or noncompliance with this chapter, any rule or standard adopted by the department pursuant to this chapter, or any permit or other approval issued 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 excessive noise shall be disclosed by the official or employee except as it relates directly to excessive noise 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 § 342F-6