Haw. Rev. Stat. § 128D-23: Exemption from state and county permits.

No state or county permit shall be required for the portion of any removal or remedial action conducted entirely on site where such response action is carried out in compliance with this chapter, or where such removal or remedial action is in response to a release of a hazardous substance or pollutant or contaminant that occurred in or on the coastal waters of the State and such removal or remedial action is carried out in compliance with this chapter, the National Contingency Plan, or at the direction of a federal or state on-scene coordinator.