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3. Irrigation. <br /> <br />o <br /> <br />(a) All landscaping areas required under this section shall include <br /> underground irrigation systems, <br /> <br /> (b) Exceptions include landscape areas that are left in a natural state. <br />Parking Lot Landscaping. All parking lots are required to provide internal <br />overstory tree plantings in an effort to shade parking surfaces and provide visual <br />relief. Plantings are required at the following minimum schedule. The planting <br />schedule is established to provide an acceptable number of plantings that may be <br />planted in regular symmetrical patterns or irregular clusters or groupings. <br /> <br />(a) 1 tree per every 10 parking spaces. <br /> <br />(b) Every overstory tree planting shall be provided with a planting area of <br /> 162 square feet. <br /> <br />(e) Acceptable ground cover materials include sod, mulch, and other <br /> natural ground cover. Landscaping rock and plastic underlayment is <br /> not allowed. <br /> <br />(d) All parking lot planting areas shall include underground irrigation <br /> systems. <br /> <br />Bufferyards. Bufferyards are intended to provide additional screening of <br />businesses that are adjacent to residential areas. The following table details the <br />width of the bufferyard along the common adjacent property line. An additional <br />increase of landscape plantings would be required in the bufferyard. That <br />increase is expressed in the table below as a percentage of the total required site <br />landscaping in the setback area. <br /> <br /> Existing ~ ~-djacent DeveloPment <br /> R-1 R-2 R-3 B-1 B-2 <br />E-2 <br />Bufferyard 60 feet 60 feet 60 feet 35 feet 35 feet <br />width <br />% Increase 30% 30% 30% 20% 20% <br />in plantings <br />required <br /> <br />d. Grading. <br /> <br />1. Final slope grades shall not exceed 3.5:1 unless terracing of retaining walls is <br /> approved. <br /> <br />2. Berming for parking lots and open space areas shall not exceed 3:1. <br /> <br />14 <br /> <br /> <br />