Notice of the time and place of the hearing shall be given by publication in a newspaper printed and published in the county in which the unreasonable waste of gas is alleged to be taking place or to be threatened. The notice shall specify the commonly accepted name or a general description of the field or locality. Publication shall be daily for five days prior to the time of the hearing. The supervisor shall also send notice by mail to each lessor, lessee, or operator, known to him, of any well in the field. Failure to send such written notice shall not affect the validity of the proceeding.