To the extent possible, the construction of any new critical facility shall be located outside the limits of the special flood hazard area (100-year floodplain). Construction of any new critical facility shall be permissible within the special flood hazard area if no feasible alternative site is available. Any critical facility constructed within said area shall have the lowest floor elevated three feet or more above the level of the base flood elevation at the site. Floodproofing and sealing measures must be taken to ensure that toxic substances will not be displaced by or released into floodwaters. To the extent possible, access routes elevated to or above the level of the base flood elevation shall be provided to all critical facilities. (Ord. 12-20 § 2 (Exh. A); Ord. 06-17 § 3 (Exh. A); Ord. 100-98 § 1)