2_Exhibits A, C & D - Laserfiche WebLink

Updated Arborist Report HortScience, Inc. 4112 Foothill Rd., October 29, 2018 Page 6 major branches below 54" above the natural grade, is measured just below the first major trunk fork. The species factor considers the adaptability and appropriateness of the plant in the Bay area. The Species Classification and Group Assignment lists recommended species ratings and evaluations. Condition reflects the health and structural integrity of the individual, as noted in the Tree Assessment Form. Location considers the site, placement, and contribution of the tree in its surrounding landscape. The appraised value of each tree is provided in Table 2. Table 2: Appraised value of trees recommended for preservation. 4112 Foothill Blvd., Pleasanton, CA Tree Trunk Appraised No. Species Diameter Preserve or Remove Value($) (in.) 1 Valley oak 44 Preserve 22,600 2 Valley oak 49 Preserve 23,250 3 Valley oak 25 Preserve 10,800 4 Valley oak 31 Preserve 16,200 5 Valley oak 42 Preserve 21,900 Tree Preservation Guidelines The goal of tree preservation is not merely tree survival during construction but maintenance of tree health and beauty for many years. Trees retained on sites that are either subject to extensive injury during construction or are inadequately maintained become a liability rather than an asset. The response of individual trees will depend on the amount of excavation and grading, the care with which demolition is undertaken, and the construction methods. These impacts can be minimized by coordinating any construction activity inside the TREE PROTECTION ZONE. Key elements of a tree preservation plan for the tree would include: The following recommendations will help reduce impacts to the tree from construction and maintain and improve its health and vitality through the construction phases. Design recommendations 1. Tree Preservation Guidelines, prepared by the Consulting Arborist, should be included on all plans. 2. Any changes to the plans affecting trees should be reviewed by the Consulting Arborist with regard to tree impacts. These include, but are not limited to, improvement plans, utility and drainage plans, grading plans, landscape and irrigation plans and demolition plans. 3. TREE PROTECTION ZONE(TPZ)shall be established around the tree. No grading, excavation, construction, or storage of materials shall occur within the TREE PROTECTION ZONE. No underground services including utilities, sub-drains, water or sewer shall be placed in the TREE PROTECTION ZONE. Spoil from trench, footing, utility or other excavation shall not be placed within the TREE PROTECTION ZONE, either temporarily or permanently. TREE PROTECTION ZONES are plotted on Tree Plan Map. 4. Grading—maintain natural grade undisturbed within the TPZ. Surface drainage must be away from the trunk. Zones shall begin by carefully hand-digging at the edge of excavation to locate and limit damage to tree roots. Work within the TPZ should be performed under the guidance of a Consulting Arborist. Appraisal of Value The City of Pleasanton requires the value be established of all trees to be removed. To accomplish this we used the standard methods found in Guide for Plant Appraisal, 9th edition (published in 2000 by the International Society of Arboriculture, Champaign IL). In addition, we referred to Species Classification and Group Assignment(2004), a publication of the Western Chapter of the International Society of Arboriculture. These two documents outline the methods employed in tree appraisal. The value of landscape trees is based upon four factors: size, species, condition and location. Size is measured as trunk diameter, normally 54"above grade. A multi-branched tree, which has