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