Oregon Revised Statutes Public Health and Safety § 459.255

(1) A permit may be suspended or revoked at any time if the Department of Environmental Quality determines that the disposal site or the solid waste management facilities located on the disposal site are being operated in violation of ORS 459.005 to 459.105 and 459.205 to 459.385 or rules of the Environmental Quality Commission adopted pursuant thereto.

(2) The procedures for denial, suspension, modification of a condition or variance, revocation or refusal to renew a permit shall be those specified for a contested case in ORS chapter 183.