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HortScience | Bartlett Consulting, Divisions of The F. A. Bartlett Tree Expert Company Preliminary Arborist Report 4400 Black Ave. Pleasanton, CA Introduction and Overview The True Life Companies is planning to re-develop the subject property located at 4400 Black Ave. in Pleasanton, CA. Current site use consists of an office building with associated parking lots and landscaping. HortScience | Bartlett Consulting (Divisions of The F.A. The Bartlett Expert Tree Company) was asked to prepare a Preliminary Arborist Report for trees at this location to assist with planning and future development. This report provides the following information: 1. An assessment of the health and structural condition of the trees within the proposed project area based on a visual inspection from the ground. 2. Evaluation of the impacts to trees based on site plans provided by the client. 3. Guidelines for tree preservation during the design, construction, and maintenance phases of development. Assessment Methods Trees were assessed on March 22, 2023. The assessment included all trees measuring 6” and larger in diameter located 1) within the project area and 2) trees on adjacent properties whose canopy extends into the project area. The assessment procedure consisted of the following steps: 1. Identifying the tree species. 2. Tagging trees and recording locations on a map. 3. Measuring the trunk diameter at a point 54 inches above grade. 4. 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. 5. Rating the suitability for preservation as “high”, “moderate” or “low”. 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. High: 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 ‘high’ category. Low: Trees 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.