(2) If any person fails to pay the fee imposed under subsection (1) of this section within 60 days, there shall be added to the fee a penalty of five percent of the amount of the fee. Any payment made after 60 days shall bear interest at the rate prescribed under ORS 305.220.
(3) The fee imposed by this section is in addition to all other state, county or municipal fees on a hazardous substance. [1989 c.833 §§123,130]