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3.3 Trees shall be provided reasonably free, as defined by nursery industry <br />' standards for street trees, from insects and disease, decay, -major structural defects, and <br />damage to the trunk, branches and root system. <br />3.4 Trees structural scaffold branches shall be well proportioned where they <br />attach to the main trunk, with an average spacing of at least six inches. <br />4. Street Tree Size Standards at Time of Planting. <br />4.1 Trees for residential classed streets shall be a minimum of 1.5" in caliper, <br />measured 6" above mean ground level, 8'-10' in height. <br />4.2 Trees for collector or arterial streets less than 2" caliper, but not less than <br />1-1/2" caliper, may be planted using the developer plant and option in R-7.280-B.1. If <br />less than 2" caliper trees are used, the establishment period shall be the greater of either <br />the standard three years or until. the tree has reached 2" in caliper. <br />4.3 Notwithstanding 4.1 and 4.2, trees for all streets abutting commercially <br />zoned properties shall be a minunum of 2" in caliper, measured 6" above mean ground <br />level, 10'-12: in height. <br />S. ~ Tree Condition at Time of Planting. Trees may be provided in the following <br />~' -- ' conditions at the time of planting: -- <br />5.1 Balled and burlapped and in wire baskets, providing: <br />5.1.1 Trees .shall have a sound ball with a firm attachment of the trunk <br />with the root.ball. The .trunk shall not be loose but firmly held within the root:> <br />ball. <br />5.1.2 Root balls shall conform to the standards and specifications of the <br />American Association of Nurserymen, American Standard for Nursery Stock, <br />currently in use for size and condition. <br />5.1.3 Root b~fls of trees shall not be allowed to dry out at any time from <br />the nursery to final planting. <br />5.1.4 Trees shall have a well developed root system and not be root bound <br />or have circling /girdling roots. <br />5.2 In a container, providing: <br />-: 5.2.1 The trees are free of circling, girdling roots. <br />Administrative Order - 11 <br />__ <br />