The director may initiate revocation proceedings against a dairy producer or milk processor whenever that producer or processor has had his or her milk processing plant operation or dairy farm operation degraded for repeated violations and/or had his or her Grade A producer's license or milk processing plant license suspended and/or his or her milk degraded due to temperature violations, excessive coliform bacteria counts, total bacterial counts, or somatic cell counts, more than four times within a continuous three year period. A license may also be revoked as provided for in RCW 15.36.401 or 15.36.411.