Whenever a laboratory fails to correctly analyze at least 90 percent of the external proficiency test samples, the Department may take such action as it deems necessary or desirable to correct the source of error. Such action may include, but is not limited to, the removal of the laboratory from the List of Certified Methadone Laboratories, and, concurrently or separately, the commencement of disciplinary proceedings to suspend or revoke the license of the laboratory.