The notice to provide the required underground facilities may be given either by personal service or by mail. In case of service by mail on either the owner or occupant of such premises, the notice must be deposited in the United States mail in a sealed envelope with postage prepaid, addressed to the person in possession of such premises at such premises, and the notice must be addressed to the owner thereof as such owner’s name appears, and must be addressed to such owner’s last known address as the same appears, on the last equalized assessment roll. If notice is given by mail, such notice shall be deemed to have been received by the person to whom it has been sent within forty-eight (48) hours after the mailing thereof. If notice is given by mail to either the owner or occupant of such premises, the Director shall, within forty-eight (48) hours after the mailing thereof, cause a copy thereof, printed on a card not less than eight inches by ten inches (8" x 10") in size, to be posted in a conspicuous place on said premises. (Ord. 652, § 10, 11/26/1968)