An applicant required to provide financial assurance under ORS 459.272 shall establish provisions satisfactory to the Department of Environmental Quality for disposing of any excess moneys received or interest earned on moneys received for financial assurance. To the extent practicable, the applicant’s provisions for disposing of the excess moneys received or interest earned on moneys shall provide for:
(1) A reduction of the rates a person within the area served by the land disposal site is charged for collection service; or
(2) Enhancing present or future disposal sites within the area from which the excess moneys were received.