Wash. Rev. Code § 48.30A.030
Independent of authority granted to the attorney general, the prosecuting attorney may petition the superior court for an injunction against a person who has violated this chapter. Remedies in an injunctive action brought by a prosecuting attorney are limited to an order enjoining, restraining, or preventing the doing of any act or practice that constitutes a violation of this chapter and imposing a civil penalty of up to five thousand dollars for each violation. The prevailing party in the action may, in the discretion of the court, recover its reasonable investigative costs and the costs of the action including a reasonable attorney's fee. The degree of proof required in an action brought under this section is a preponderance of the evidence. An action under this section must be brought within three years after the violation of this chapter occurred.
RCW 48.30A.030