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(2) The stone bed shall be located a I~nirm,m of twenty feet <br />(20') from any building or ten feet (10') from any <br />property line or sanitary sewer easement. <br />(3) An approved filter fabric shall cover the top and sides <br />of the stone bed. <br />(4) The required volume of the stone bed shall be calculated <br />using approved terms for coefficient of runoff, drainage <br />area, storm intensity and time of concentration. The <br />porosity ratio shall be 0.33 to figure net volume from <br />the gross volume. <br />(5) An observation well shall be required for inspection <br />purposes. The location and diameter shall be approved <br />by the Engineering Department. The observation well <br />shall be as deep as the deepest part of the stone bed. <br />Perforated pipe may be approved for use in an observation <br />well. <br />(6) The infiltration basin shall have a sump pump to <br />discharge excess water to an approved storm sewer or <br />ditch. <br />(c) All storm water flow from the proposed development, including <br />flows from upstream areas passing through, and further including <br />increased flow attributable to changes in time of concentration or <br />changes in the former runoff factor (Imperviousness), shall be conveyed <br />to the proper storage facility end outlet for the entire tributary area <br />via a natural channel or pipe/culvert either or both of which shall be <br />improved so as to be of adequate capacity. <br />927.08 MAINTENANCE. <br />(a) Any portion of the drainage system and storage facilities, that <br />is constructed by the developer will be continuously maintained by the <br />owner or owners. The developer shall cause the maintenance obligation <br />to be inserted in the chain of title to the affected lands as a <br />covenant running with the land. <br />(b) The Planning Commission may restrict the planting of trees, <br />shrubbery or plantings with woody growth characteristics, and against <br />the construction therein of building, accessory buildings, fences, walls <br />or any other obstructions to the free flow of storm water or where such <br />may hinder the maintenance of storm water control structures. <br />(c) The Division of Engineering is hereby charged with the duty of <br />inspecting all storm water management and erosion and sediment control <br />systems. The owner or persons in control of private property whereon <br />such systems are located shall, at all reasonable times, permit the <br />inspection of such systems. <br />Page - 22 - <br />