The definitions in this section apply throughout this chapter unless the context clearly requires otherwise.

(1) "Department" means the state department of health.

(2) "Industrial wastewater" means the water or liquid carried waste from an industrial process. These wastes may result from any process or activity of industry, manufacture, trade, or business, from the development of any natural resource, or from animal operations such as feedlots, poultry houses, or dairies. The term includes contaminated stormwater and leachate from solid waste facilities.

(3) "Large on-site sewage system" means an on-site sewage system with design flows of between three thousand five hundred gallons per day and one hundred thousand gallons per day.

(4) "On-site sewage system" means an integrated system of components, located on or nearby the property it serves, that conveys, stores, treats, and provides subsurface soil treatment and disposal of domestic sewage. It consists of a collection system, a treatment component or treatment sequence, and a subsurface soil disposal component. It may or may not include a mechanical treatment system. An on-site sewage system also refers to a holding tank sewage system or other system that does not have a soil dispersal component. A holding tank that discharges to a sewer is not included in the definition of on-site sewage system. A system into which stormwater or industrial wastewater is discharged is not included in the definition of on-site sewage system.

(5) "Person" means any individual, corporation, company, association, firm, partnership, governmental agency, or any other entity whatsoever, and the authorized agents of any such entities.

(6) "Secretary" means the secretary of health.

(7) "Waters of the state" has the same meaning as defined in RCW 90.48.020.