14 - Laserfiche WebLink

Tree Report, 218 Ray Street, Pleasanton February 12, 2020 Ed Brennan, Consulting Arborist Page 1 Introduction and Overview Win Structural Consulting Group, Inc. is planning to build an office building located at 218 Ray Street in Pleasanton. Ed Brennan, Consulting Arborist, was asked to prepare a Tree Preservation Report for the project for review by the City of Pleasanton. This report provides the following information 1. A survey of trees currently growing on the site. 2. An evaluation of each tree's suitability for preservation. 3. An evaluation of the value of each tree in U.S. Dollars 4. An assessment of the impacts of constructing the proposed project on the trees. 5. Guidelines for preserving selected trees during development. Survey Methods Trees were surveyed on February 7, 2020. The survey included trees greater than 6" in diameter. The survey procedure consisted of the following steps: 1. Identifying the tree as to species; 2. Tagging each tree with an identifying number and recording its location on a map; 3. Measuring the trunk diameter at a point 54" above grade; 4. Measuring the dripline in the four cardinal directions. 5. Evaluating the health and structural condition using a scale of 1 — 5: 5 - A healthy, vigorous tree, reasonably free of signs and symptoms of disease, with good structure and form typical of the species. 4 - Tree with slight decline in vigor, small amount of twig dieback, minor structural defects that could be corrected. 3 - Tree with moderate vigor, moderate twig and small branch dieback, thinning of crown, poor leaf color, moderate structural defects that might be mitigated with regular care. 2 - Tree in decline, epicormic growth, extensive dieback of medium to large branches, significant structural defects that cannot be abated. 1 - Tree in severe decline, dieback of scaffold branches and/or trunk; most of foliage from epicormics; extensive structural defects that cannot be abated. 0 — Tree is dead 6. Rating the suitability for preservation as "good", "moderate" or "poor". Suitability for preservation considers the health, age and structural condition of the tree, and its potential to remain an asset to the site for years to come. Good: Trees with good health and structural stability that have the potential for longevity at the site. Moderate: Trees with somewhat declining health and/or structural defects than can be abated with treatment. The tree will require more intense management and monitoring, and may have shorter life span than those in 'good' category. Poor. Tree in poor health or with significant structural defects that cannot be mitigated. Tree is expected to continue to decline, regardless of treatment. The species or individual may have characteristics that are undesirable for landscapes, and generally are unsuited for use areas.