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deciduous and lot less than 25 percent coniferous. <br />No more than 25% of the required plantings shall <br />consist of ornamental trees. <br /> <br />o <br /> <br />One overstory tree shall be planted every 35 feet in <br />the boulevard along every street frontage. The <br />number of overstory trees needed for boulevard <br />plantings may be deducted from the overstory tree <br />requirement in (ii) above. <br /> <br />e. Grading. <br /> <br />Final slope grades shall not exceed 3.5:1 unless <br />terracing of retaining walls is approved. <br /> <br />o <br /> <br />Berming for parking lots and open space areas shall <br />not exceed 3:1. <br /> <br />Sodding and Ground Cover. All areas not other wise <br />improved in accordance with approved site plans shall <br />be sodded. <br /> <br />g. Irrigation. <br /> <br />All landscaping areas required under this section <br />shall include underground irrigation systems. <br /> <br />Exceptions include landscape areas that are left in a <br />natural state. <br /> <br />Parking Lot Landscaping. All parking lots are required to <br />provide internal overstory tree plantings in an effort to shade <br />parking surfaces and provide visual relief. Plantings are required <br />at the following minimum schedule. The planting schedule is <br />established to provide an acceptable number of plantings that <br />may be planted in regular symmetrical patterns or irregular <br />dusters or groupings. <br /> <br />a. 1 tree per every 10 parking spaces. <br /> <br />b. Every overstory tree planting shall be provided with a <br /> planting area of 162 square feet. <br /> <br />Acceptable ground cover materials include sod, mulch, and <br />other natural ground cover. Landscaping rock and plastic <br />underlayment is not allowed. <br /> <br /> <br />