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17.08.150 <br />the standards in Section 17.08.150(C)(3). <br />Upon the completion of the structure, the <br />elevation of the lowest floor, including <br />basement, shall be certified by a registered <br />professional engineer or surveyor, or veri- <br />fied by the community building inspector <br />to be properly elevated. Such certification <br />or verification shall be provided to the <br />Floodplain Administrator. <br />3. Nonresidential construction shall <br />either be elevated in conformance with <br />Section 17.08.150(C)(1) or (C)(2) or to- <br />gether with attendant utility and sanitary <br />facilities: <br />a. Be floodproofed so that below the <br />base flood level the structure is watertight <br />with walls substantially impermeable to the <br />passage of water; <br />b. Have structural components capable <br />of resisting hydrostatic and hydrodynamic <br />loads and effects of buoyancy; and <br />c. Be certified by a registered profes- <br />sional engineer or architect that the stan- <br />dards of this subsection are satisfied. Such <br />certifications shall be provided to the <br />Floodplain Administrator. <br />4. Require, for all new construction and <br />substantial improvements, that fully en- <br />closed areas below the lowest floor that are <br />subject to flooding shall be designed to <br />automatically equalize hydrostatic flood <br />forces on exterior walls by allowing for the <br />entry and exit of floodwaters. Designs for <br />meeting this requirement must either be <br />certified by a registered professional engi- <br />neer or architect or meet or exceed the fol- <br />lowing minimum criteria: <br />a. Either a minimum of two (2) open- <br />ings having a total net area of not less than <br />one (1) square inch for every square foot of <br />enclosed area subject to flooding shall be <br />provided. The bottom of all openings shall <br />be no higher than one (1) foot above grade. <br />Openings may be equipped with screens, <br />louvers, valves or other coverings or de- <br />vices provided that they permit the auto- <br />matic entry and exit of floodwaters; or <br />b. Be certified to comply with a local <br />floodproofing standard approved by the <br />Federal Insurance Administration. <br />5. Manufactured homes shall also meet <br />the standards in Section 17.08.180. (Ord. <br />1951 § 1 (Exh. A), 2007; Ord. 1374 § 2 <br />(part), 1989) <br />17.08.160 Standards-Utilities. <br />A. All new and replacement water sup- <br />ply and sanitary sewage systems shall be <br />designed to minimize or eliminate infiltra- <br />tion of floodwaters into the system and <br />discharge from systems into floodwaters. <br />B. On-site waste disposal systems shall <br />be located to avoid impairment to them or <br />contamination from them during flooding. <br />(Ord. 1951 § 1 (Exh. A), 2007; Ord. 1374 <br />§ 2 (part), 1989) <br />17.08.170 Standards-Subdivisions. <br />A. All preliminary subdivision propos- <br />als shall identify the flood hazard area and <br />the elevation of the base flood. <br />B. All final subdivision plans will pro- <br />vide the elevation of proposed structure(s) <br />and pads. If the site is filled above the base <br />flood, the final pad elevation shall be certi- <br />fied by a registered professional engineer <br />or surveyor and provided to the Floodplain <br />Administrator. <br />C. All subdivision proposals shall be <br />consistent with the need to minimize flood <br />damage. <br />(Pleasanton Supp. No. 19, 9-07) 434 <br />