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(i) be certified by a registered professional engineer or <br /> architect or <br /> (ii) be certified to comply with a local floodproofing standard <br /> approved by the Federal Insurance Administration, Federal <br /> Emergency Management Agency, or <br /> (iii) have a minimum of two (2) openings having a total net <br /> area of not less than one (1) square inch for every square <br /> foot of enclosed area subject to flooding. The bottom of <br /> all. openings shall be no higher than one (1) foot above <br /> grade. Openings may be equipped with screens, louvers, <br /> valves or other coverings or devices provided that they <br /> permit the automatic entry and exit of floodwater. <br /> (4) Manufactured homes shall also meet the standards in Section 7- <br /> 9 -515. <br /> Section 7 -9 -505 STANDARDS FOR UTILITIES. <br /> (a) All new and replacement water supply and sanitary sewage systems shall <br /> be designed to minimize or eliminate: <br /> (1) infiltration of flood waters into the systems, and <br /> (2) discharge from the systems into flood waters. <br /> (b) On -site waste disposal systems shall be located to avoid impairment to <br /> them, or contamination from them, during flooding. <br /> Section 7 -9 -510 STANDARDS FOR SUBDIVISIONS <br /> (a) All preliminary subdivision proposals shall identify the flood hazard area <br /> and the elevation of the base flood. <br /> (b) All subdivision plans will provide the elevation of proposed structure(s) <br /> and pad(s). If the site is filled above the base flood elevation, the final <br /> first floor and pad elevations shall be certified by a registered <br /> professional engineer or surveyor and provided to the Floodplain <br /> Administrator. <br /> 18 <br />