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BUENA VISTA TREE SERVICE ARBORIST REPORT Page 6 <br />ARBORIST REPORT, 544 SYCAMORE ROAD, PLEASANTON, CA. 94566 December 2023 <br /> <br /> <br /> <br />Evaluation of construction impacts based on preliminary plan set <br />I referenced the Kottapalli Residence plan set (10/9/23) by Douglas J. Harwood Classic Home <br />Design sheets A1, A2, and A4 to determine impacts to the subject trees from development. <br />Construction plans and detail drawings were not available. <br /> <br />Tree removal <br />Crape myrtle #4 is within the construction footprint and will require removal. Stump treatment <br />includes removal of the interior core by grinding or other suitable method to sever the roots from <br />the stem. Herbicides such as Roundup are not to be used to kill the stump as the chemical <br />could translocate to live roots of nearby trees causing damage and potentially killing the plant. <br />Tree roots and roots from other plantings are intertwined and welded together within the soil and <br />provide a conduit and transport system for systemic herbicides. <br /> <br />Tree pruning <br />It is recommended that selective pruning reduction cuts be utilized for valley oaks #7 and 8 as <br />required to allow for equipment and construction access, and to balance the canopies and <br />remove dead wood. All pruning must be performed by an International Society of Arboriculture <br />Certified Arborist in compliance with ANSI A-300 Standard Practices for Pruning (2017), and <br />companion Best Management Practices – Tree Pruning, third edition. <br /> <br />Trunk wrapping <br />Trees #1-3, and 5-8 shall be trunk-wrapped with straw wattle to 6’ or the lowest branch to <br />prevent damage to the bark. Wrap straw wattle around the trunk from the base at ground level <br />and place the root buffer up to the straw wattle at the base of the tree (see illustration 1, <br />following page). <br /> <br />Mulching <br />The bark chips on site shall be placed up to (not beneath) the straw wattle, to avoid covering the <br />base of the trunk. <br /> <br />Tree protection fencing <br />The creation of four (4) tree protection zones (TPZ) will be required for trees #1-3, and 5-8 to <br />prevent soil compaction and root damage within the dripline of the tree and provide for worker <br />and equipment access, and for the staging of equipment and materials. (see illustration 1, <br />following page). <br /> <br />Root buffer installation <br />A root buffer is required to create an air cushion for the root system trees #1-3, and 5-8 of and <br />provide a stable walking surface for workers and the transport of materials and equipment. Prior <br />to the installation of the root buffer, all materials within the construction zone will need to be <br />removed including tools, wood from prior tree removals, construction materials, and all other <br />debris. The root buffer shall be constructed of ¾” bark chips to a depth of 4-6”, capped with a <br />layer of gravel to stabilize a layer of ¾” plywood on top (see illustration 1, following page). The <br />wood chips on site can be utilized to configure the root buffer. <br /> <br />Access route <br />Access routes will primarily enter from the western frontage northern portion of the site between <br />Sycamore Road and the barn. The access routes will be covered with the root buffer as <br />Page 127 of 448Page 136 of 557