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RPUD Ordinance - 4th Draft December 18,2000 Page 11 <br /> least equal the floor area of the existing structure. A sprinkler <br /> system shall be provided for all landscaped areas except areas <br /> to be preserved in a natural state. <br /> f) Not more than 50 percent of the required number of trees <br /> shall be composed of one species. The City shall maintain a <br /> list of prohibited species which shall not be used for <br /> landscaping. <br /> Ed Note: Keep a separate schedule of prohibited species such as this: <br /> No required tree shall be one of the following: <br /> 1) a species of the genus Ulmus (elm), except those elms bred to be immune to Dutch Elm Disease; <br /> 2) box elder; <br /> 3) a species of the genus Populous (poplar); or <br /> 4) female ginko. <br /> 3. Interior Parking Lot Landscaping. <br /> a) All parking lots containing over 150 stalls shall be designed <br /> to incorporate unpaved, landscaped islands in number and <br /> dimension as required by the City. All landscape islands shall <br /> contain a minimum of 180 square feet. Islands which are <br /> necessary to promote the safe and efficient flow of traffic <br /> shall not be subject to the "150 stall" standard and shall be <br /> required by the city when warranted. <br /> b) Parking lot landscape areas,including landscape islands,shall <br /> be reasonably distributed throughout the parking lot area so as <br /> to break up expanses of paved areas. Parking lot landscape <br /> areas shall be provided with deciduous shade trees, <br /> ornamental or evergreen trees, plus ground cover, mulch <br /> and/or shrubbery as determined appropriate by the Planning <br /> Commission. Parking lot landscape trees shall be provided at <br /> the rate of one tree for each 15 surface parking spaces <br /> provided, or major fraction thereof. Parking lot landscaping <br /> shall be contained in planting beds bordered by a raised <br /> concrete curb or equivalent approved by the Planning <br /> Commission. <br />