Wash. Rev. Code § 47.68.320
Every order of the department requiring performance of certain acts or compliance with certain requirements and any denial or revocation of an approval, certificate, or license shall set forth the reasons and shall state the acts to be done or requirements to be met before approval by the department will be given or the approval, license, or certificate granted or restored, or the order modified or changed. Orders issued by the department under this chapter shall be served upon the persons affected either by certified mail or in person. In every case where notice and opportunity for a hearing are required under this chapter, the order of the department shall, on not less than ten days notice, specify a time when and place where the person affected may be heard, or the time within which the person may request a hearing, and the order shall become effective upon the expiration of the time for exercising the opportunity for a hearing, unless a hearing is held or requested within the time provided, in which case the order shall be suspended until the department affirms, disaffirms, or modifies the order after a hearing has been held or default by the person has been affected. To the extent practicable, hearings on the orders shall be in the county where the affected person resides or does business. Any person aggrieved by an order of the department or by the grant, denial, or revocation of an approval, license, or certificate may have the action of the department reviewed by the courts of this state under chapter 34.05 RCW.
RCW 47.68.320