RCW 69.30.080: Licenses or certificates of approval—Department may deny, revoke, or suspend.

(1) The department may deny, revoke, or suspend a person's license or certificate of approval for:

(a) Violations of this chapter or the rules adopted under this chapter; or

(b) Harassing or threatening an authorized representative of the department during the performance of his or her duties.

(2) RCW 43.70.115 governs notice of a license denial, revocation, suspension, or modification and provides the right to an adjudicative proceeding.