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ORDINANCE 2010- 008 building and a site perimeter shall be a minimum of sixteen (16) feet in height with a three-inch diameter at 0.5 feet above grade and a minimum eight -foot spread at planting. Where a building over twenty-five (25) feet in height is proposed more than seventy (70) feet from a perimeter, the canopy tree height requirements of (d) 1., above, shall apply to canopy trees within the buffer. 2. Required understory trees shall be a minimum of six (6) feet overall in height and one - and -a -half (1.5) inches diameter at 0.5 feet above grade; at the time of planting. Multi - trunk trees shall have a combined one -and -a -half (1.5) inch caliper for all trunks at six (6) inches above grade. Palm trees used as understory trees shall have a minimum overall height of six (6) feet and shall not comprise more than one-third of the total understory tree requirement. (e) The number of different species of trees, other than palms, shall be as follows: Table 1 Required Number of Trees Minimum Number of Species 2--10 2 11--20 3 21--30 4 31--40 5 41 --Over 6 For sites or parcels located in a sand ridge or xeric scrub environment as determined by county environmental planning staff, a minimum of three (3) species shall be required, regardless of the required number of trees. Such trees shall be indigenous to, and tolerant of, sand ridge or xeric scrub conditions. (f) At least fifty (50) percent of all required canopy trees, understory trees, and palms shall be a native species as listed in Appendix A. (g) Trees in proximity to public works or easements. Trees of a species whose roots are known to cause damage to sidewalks, roads, or driveways shall not be planted closer than six (6) feet to such structures unless a tree root system barrier, approved by the public works director or his designee, is provided that protects the structure(s) from damage by the root system. Said root barrier, where required, shall be installed prior to issuance of a certificate of occupancy or certificate of completion. (h) Prohibited trees. The installation of any of the species listed in Appendix B is prohibited. (i) Credits for the use of newly planted trees larger than the minimum size wi44 shall be as indicated in Table 2. Fractional measurements shall be attributed to the next lowest category. These efedits shall not apply to See Table 3 regarding credits for trees pre-existing or relocated on-site. Bold Underline: Additions to Ordinance 16 Strike through: Deleted Text from Existing Ordinance F:\Community Development\Users\CurDev\ORDINANCE\20 1 0\20 10- Landscape 911, 926 and 927.RTF