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Arborist Report. 4400 Black Ave. Pleasanton. Page 9 The True Life Companies May 2023 HortScience | Bartlett Consulting, Divisions of The F. A. Bartlett Tree Expert Company Estimate of Tree Value The City of Pleasanton requires that the value of trees be included in Arborist Reports. To estimate the value of the trees, I used the cost approach, reproduction method, and trunk formula technique, as described in the Guide for Plant Appraisal, 10th edition (International Society of Arboriculture, Champaign IL, 2018). In addition, I referred to Species Classification and Group Assignment (2004), a publication of the Western Chapter of the International Society of Arboriculture. When estimating reproduction cost, the trunk formula technique considers four factors: size, condition, functional limitations, and external limitations. Size is measured as trunk diameter, normally 54" above grade. Condition reflects the health and structural integrity of the tree. Functional limitations reflect constraints to tree development based on the site and species. For this site, I did not factor in any external limitations. The reproduction cost of the 23 trees planned for preservation is $39,600. The reproduction cost of the 41 trees planned for removal is $55,050. The estimated value of each tree is listed in the Tree Assessment attachment. Preliminary Tree Preservation Guidelines The goal of tree preservation is not merely tree survival during development 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 depends on the amount of excavation and grading, care with which demolition is undertaken, and construction methods. Coordinating any construction activity inside the TREE PROTECTION ZONE can minimize these impacts. All on-site trees will be removed. Trees located off-site but close to the project boundary will be retained. The following recommendations will help reduce impacts to trees from development and maintain and improve their health and vitality through the clearing, grading and construction phases. Plans needed to develop accurate TREE PROTECTION ZONES would include site layout, grading, utilities, planting and irrigation plans. Specific Tree Protection measures can be developed when construction plans are available for review. Design recommendations 1. Where possible, include the location of all trees within 10 feet of the project limit. Include trunk locations on all project plans. 2. All plans affecting trees shall be reviewed by the Consulting Arborist with regard to tree impacts. These include, but are not limited to, demolition plans, grading plans, drainage plans, utility plans, and landscape and irrigation plans. 3. Irrigation systems must be designed so that no trenching severs roots larger than 2 inches in diameter will occur within the TREE PROTECTION ZONE. 4. Any herbicides placed under paving materials must be safe for use around trees and labeled for that use. Pre-demolition and pre-construction treatments and recommendations 1. A TREE PROTECTION ZONE shall be identified for each tree to be preserved on the Tree Protection Plan prepared by the project arborist. 2. Off-site trees to be preserved may require pruning to provide clearance for demolition, grading and construction. Tree care firm providing the pruning shall be a State of California Licensed Tree Contractor (C61/D49). All pruning shall be done by Certified Arborist or Certified Tree Worker in accordance with the latest edition of the Best