Haw. Rev. Stat. § 342L-35: Response to suspected or confirmed releases.

The department, pursuant to chapter 91, shall adopt requirements for investigating a suspected release and taking action in response to a confirmed release from an underground storage tank or tank system, which shall include at least the following:

(1) Requirement that when a release is found, the substances in the tank or tank system be emptied if emptying the substances does not present a greater danger to human health or the environment;

(2) Requirement for proper closure of the tank or tank system, following the requirements established under section 342L-37, or repair and testing of the tank or tank system before placing it back into operation;

(3) Requirement that the owner and operator of the underground storage tank or tank system that had a release restore the environment to a condition and quality acceptable to the department; and

(4) Requirement to notify those members of the public directly affected by the release and the proposed response to the release.