Whenever the word "person" is used in this chapter, it shall be construed to include any political subdivision, government agency, municipality, industry, public or private corporation, copartnership, association, firm, individual or any other entity whatsoever.
Wherever the words "waters of the state" shall be used in this chapter, they shall be construed to include lakes, rivers, ponds, streams, inland waters, underground waters, salt waters and all other surface waters and watercourses within the jurisdiction of the state of Washington.
Whenever the word "pollution" is used in this chapter, it shall be construed to mean such contamination, or other alteration of the physical, chemical or biological properties, of any waters of the state, including change in temperature, taste, color, turbidity, or odor of the waters, or such discharge of any liquid, gaseous, solid, radioactive, or other substance into any waters of the state as will or is likely to create a nuisance or render such waters harmful, detrimental or injurious to the public health, safety or welfare, or to domestic, commercial, industrial, agricultural, recreational, or other legitimate beneficial uses, or to livestock, wild animals, birds, fish or other aquatic life.
Wherever the word "department" is used in this chapter it shall mean the department of ecology.
Whenever the word "director" is used in this chapter it shall mean the director of ecology.
Whenever the words "aquatic noxious weed" are used in this chapter, they have the meaning prescribed under RCW 17.26.020
Whenever the words "general sewer plan" are used in this chapter they shall be construed to include all sewerage general plans, sewer general comprehensive plans, plans for a system of sewerage, and other plans for sewer systems adopted by a local government entity including but not limited to cities, towns, public utility districts, and water-sewer districts.