2015 ORS § 448.430¹
The requirements of ORS 448.415 (Certification required for operators) shall not apply to:
(1) Any sewage treatment works with an approved design flow of less than 75,000 gallons a day, if the owner has contracted with a certified operator to provide part-time supervision as the Environmental Quality Commission by rule determines necessary; or
(2) A subsurface sewage disposal system as defined in ORS 454.605 (Definitions for ORS 454.605 to 454.755). [1987 c.635 §7]
Note: See note under 448.405 (Definitions for ORS 448.405 to 448.465).