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provided the lots were established prior to October 26, 1978, the initial establishment of <br />a floodplain ordinance. <br />(4) All areas of nonresidential structures, including basements, to be placed below the <br />regulatory flood protection elevation must be floodproofed in accordance with the <br />structurally dry floodproofing classifications in the State Building Code. Structurally dry <br />floodproofing must meet the FPI or FP2 floodproofing classification in the State Building <br />Code, which requires making the structure watertight with the walls substantially <br />impermeable to the passage of water and with structural components capable of resisting <br />hydrostatic and hydrodynamic loads and the effects of buoyancy. <br />(5) The placement of more than 1,000 cubic yards of fill or other similar material on a parcel <br />(other than for the purpose of elevating a structure to the regulatory flood protection <br />elevation) must comply with an approved erosion/sedimentation control plan. <br />(a) The plan must clearly specify methods to be used to stabilize the fill on site for a flood <br />event at a minimum of the regional (1% chance) flood event. <br />(b)The plan must be prepared and certified by a registered professional engineer or other <br />qualified individual acceptable to the City of Orono. <br />(c) The plan may incorporate alternative procedures for removal of the material from the <br />floodplain if adequate flood warning time exists. <br />(6) Storage of materials and equipment below the regulatory flood protection elevation must <br />comply with an approved emergency plan providing for removal of such materials within <br />the time available after a flood warning. <br />(7) Alternative elevation methods other than the use of fill may be utilized to elevate a <br />structure's lowest floor above the regulatory flood protection elevation. The base or floor <br />of an enclosed area shall be considered above -grade and not a structure's basement or <br />lowest floor if: 1) the enclosed area is above -grade on at least one side of the structure; 2) <br />it is designed to internally flood and is constructed with flood resistant materials; and 3) it <br />is used solely for parking of vehicles, building access or storage. The above -noted <br />alternative elevation methods are subject to the following additional standards: <br />(a) Design and Certification - The structure's design and as -built condition must be <br />certified by a registered professional engineer as being in compliance with the general <br />design standards of the State Building Code and, specifically, that all electrical, heating, <br />ventilation, plumbing and air conditioning equipment and other service facilities must <br />be at or above the regulatory flood protection elevation or be designed to prevent <br />flood water from entering or accumulating within these components during times of <br />flooding. <br />(b)Specific Standards for Above -grade, Enclosed Areas - Above -grade, fully enclosed areas <br />such as crawl spaces or tuck under garages must be designed to internally flood and <br />the design plans must stipulate: <br />(i) The minimum area of openings in the walls where internal flooding is to be used as <br />a floodproofing technique. There shall be a minimum of two openings on at least <br />two sides of the structure and the bottom of all openings shall be no higher than <br />one foot above grade. The automatic openings shall have a minimum net area of <br />12 <br />