The definitions in this section apply to RCW 90.48.636 unless the context clearly requires otherwise.
(1) "Combined sewer" means a sewer that has been designed to serve as a sanitary sewer and a storm sewer, and into which inflow is allowed by local ordinance.
(2) "Sewage spill" means the intentional or accidental discharge of untreated or undertreated wastewater that does not meet permit requirements, from any portion of a sewage treatment plant or collection system, including a combined sewer, in this state.
(3) "Sewage treatment plant or collection system" means any sewage treatment plant, water pollution control facility, related pumping system, collection system, or other public sewage works.