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Preliminary Tree Report, 3459 Foothill Rd., Pleasanton Apri12,2004 HortScience, Inc. Page 1 Introduction and Overview Equity Enterprises is planning to develop a residential project at 3459 Foothill Rd. in Pleasanton California. Two residences, outbuildings and open rangeland currently occupy the site. Equity Enterprises has proposed two possible project designs, the main difference between the two being their placement on the sne. In Design A eight lots extend from a central road along the northem swale. This requires removal of outbuildings, grading of a portion of the site, installation of a road and construction of new homes and related infrastructure. In Design B eight lots are located along the southem property line, requiring grading of a portion of the site, installation of a road and construction of new homes and related infrastructure. HortScience, Inc. was asked to prepare a Tree Report for the site for review by the City of Pleasanton. This report provides the following information: 1. A survey of trees within the proposed project area. 2. An assessment of the impacts of constructing either proposed design on the trees. 3. Estimation of trees to be removed and preserved. Survey Methods Trees were surveyed in February 2004. The survey included trees greater than 6". 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. 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 "good", 'moderate" or 'poor". Suitability for preservation considers the health, age and structural condition of the tree species, 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.