The director may modify, suspend, or revoke any permit if, after affording the permittee an opportunity for a hearing in accordance with chapter 91, the director determines that:
Public notice shall be given of proposed decisions respecting permit issuance, reissuance, denial, revocation, suspension, substantial modification to a permit requested by a permittee, and modifications to a permit initiated by the director. The director may hold a public hearing before issuing a final decision respecting a permit issuance, reissuance, denial, revocation, suspension, request by a permittee to substantially modify a permit, and any modification to a permit initiated by the director if the director determines that such a public hearing is in the public interest. The permit notice and public hearing requirements in this section shall not apply to used oil permits as provided for in section 342J-54.
HRS § 342J-5