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Tree Report, 218 Ray Street, Pleasanton February 12, 2020 Ed Brennan, Consulting Arborist Page 5 Tree Appraisals The trees were appraised using the trunk formula technique found in the Guide for Plant Appraisal, 10th edition (Atlanta GA: 2019, International Society of Arboriculture). A regional companion publication, Species Classification and Group Assignment (2004, Western Chapter -International Society of Arboriculture), was also used. The value of landscape trees and plants is based upon four factors: size, condition, functional limitations, and external limitations. Size is measured as trunk diameter, at 54" above grade. The components of condition are health, structural integrity, and form. Functional limitations are factors associated with the interaction of a tree with its planting site, for instance, overhead utility lines may limit its future growth. External limitations are factors outside of the property that will limit the plant's development in the foreseeable future, such as view or solar access ordinances. Applying the above-described method to the seventeen trees surveyed yielded an aggregate total value of $16,780 (U.S. dollars). Values for individual trees are shown in the table below. Tree Preservation Guidelines Certain trees will be designated for preservation based on their suitability for preservation and location relative to the development plan. Once those decisions have been made, 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. 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 will depend on the amount of excavation and grading, the care with which demolition is undertaken, and the construction methods. Coordinating any construction activity inside the Tree Protection Zone can minimize these impacts. 218 Ray Street is an already -developed site. Tree roots will be protected from damage by the existing parking lot pavement. Above -ground portions of the trees are subject to damage by construction vehicles and equipment. Table 6: Tree Appraisals Tree No. Species Trunk Appraised diameter Value 1 Bradford pear 11 $690 2 Bradford pear 8 $510 3 Bradford pear 6 $290 4 Bradford pear 9 $470 5 Bradford pear 10 $570 6 Valley oak 6 $650 7 Pecan 25 $13,600 Tree Preservation Guidelines Certain trees will be designated for preservation based on their suitability for preservation and location relative to the development plan. Once those decisions have been made, 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. 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 will depend on the amount of excavation and grading, the care with which demolition is undertaken, and the construction methods. Coordinating any construction activity inside the Tree Protection Zone can minimize these impacts. 218 Ray Street is an already -developed site. Tree roots will be protected from damage by the existing parking lot pavement. Above -ground portions of the trees are subject to damage by construction vehicles and equipment.