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(12) All conditions pertaining to a specific site are subject to change when the council, upon <br />investigation in relation to a formal request, finds that the general welfare and public betterment <br />can be served as well or better by modifying the conditions. <br />(13) Lighting. Any lighting used to illuminate an off-street parking area, sign or structure, shall be <br />arranged to deflect light away from _ • _ e _ • e - _ • _ adjoining residential <br />properties and/or public street. Bulbs emitting in excess of 3,000 lumens (150 watts) shall be so <br />directed that the bulb is not visible from off of the property where such light source is located. <br />(14) Landscaping and buffering. <br />a. Site landscaping. <br />1. Minimum landscaping requirements. All open space areas of a lot which are not used <br />or improved for required parking areas, drives or storage shall be landscaped with a <br />combination of overstory trees, ornamental trees, shrubs, flowers, ground cover, <br />decorative walks, or other similar site design materials in a quantity and placement <br />suitable for the site. A reasonable attempt should be made to preserve as many <br />existing trees as is practicable and to incorporate them into the development. For <br />each existing significant tree retained one overstory tree can be deducted from the <br />minimum requirements. <br />2. Number of plantings. The minimum number of overstory trees on any given site shall <br />be as indicated below. These are minimum requirements that are typically <br />supplemented with other understory trees, shrubs, flowers and ground covers deemed <br />appropriate for a complete quality landscape treatment of a site. <br />Business Districts <br />Deciduous/coniferous <br />trees <br />Shrubs <br />1 per 50 lineal feet of site perimeter, or 1 tree per 1,000 square feet of building <br />footprint, whichever is greater. For expansions to buildings, 1 additional tree is <br />required for each 1,000 square feet of additional building footprint area. <br />1 per 30 feet of site perimeter or 1 per 300 square feet of building footprint <br />area, whichever is greater. <br />3. Minimum size of plantings. Landscaping material shall be of the following minimum <br />planting size: <br />Landscape Material Size <br />Deciduous trees 2.5 inches diameter as measured three feet above ground <br />Coniferous trees 6 feet in height <br />Deciduous shrubs <br />2 feet in height <br />Page 4 <br />