The notice required by Section 13.16.250 shall be served by delivering it personally to the owner, or if he cannot, after diligent effort, be personally served, by placing it in the mail, with postage paid for certified mail, addressed to the owner as his address appears on the records of the county assessor. If service cannot with diligent effort be accomplished by personal delivery or by mail, notice may be given by posting a copy at the well site or by posting copies not more than one thousand (1,000) feet apart along the subject property. Notice by posting shall be deemed complete one week after posting. (Prior code § 7785)