(1) Surveyed existing ground elevations of the four corners of the proposed development; and

(2) The actual elevation (in relation to mean sea level) of the lowest floor (including basement) of all new or substantially improved structures, and whether or not the structure contains a basement; and

(3) The actual elevation (in relation to mean sea level) of floodproofing of all new or substantially improved floodproofed structures, and that the floodproofing measures utilized below the base flood elevation render the structure watertight with walls substantially impermeable to the passage of water and have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy. (Added by Amended Ord. 02-064, Dec. 9, 2002, Eff date Feb. 1, 2003; Amended by Amended Ord. 07-005, Feb. 21, 2007, Eff date Mar. 4, 2007).