If a building site is in a floodable area as identified by the Flood Insurance Study issued by the Federal Insurance Administration, or in any other floodable area as designated by the city, all new construction or substantial improvements (see Section 104(b) of the Uniform Building Code), including placement of prefabricated buildings, which is below the base flood elevation, shall be constructed with materials and mechanical equipment resistant to flood damage and constructed by methods and practices that minimize flood damage.  Where permitted by ordinance or statute, the elevation of this site with infiltration-resistant fill, as certified by a registered engineer or architect, for a distance of fifteen feet beyond the foundations of the structure to an elevation above the base flood elevation along with the floodproofing of any drains located below the base flood elevation shall be considered acceptable floodproofing. (Ord. S-36983, 1978).