Oregon Revised Statutes Public Health and Safety § 466.215

(1) At the time a hazardous waste disposal site is closed, the person permitted under ORS 466.110 to 466.170 to operate the site, must obtain a post-closure permit from the Department of Environmental Quality.

(2) A post-closure permit issued under this section must be maintained until the end of the post-closure period established by the Environmental Quality Commission by rule.

(3) In order to obtain a post-closure permit the permittee must provide post-closure care which shall include at least the following:

(4) The commission may by rule establish a post-closure permit application fee.