Oregon Revised Statutes Public Health and Safety § 459.268

When solid waste is no longer received at a land disposal site, the person who holds or last held the permit issued under ORS 459.205 or, if the person who holds or last held the permit fails to comply with this section, the person owning or controlling the property on which the disposal site is located, shall close and maintain the site according to the requirements of this chapter, any applicable rule adopted by the Environmental Quality Commission under ORS 459.045 and any requirement imposed by the Department of Environmental Quality as a condition to renewing or issuing a disposal site permit.