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Tree Report, Vineyard Gardens, LLC, Pleasanton, CA HortScience, Inc. December 10, 2007 Page 3 Table 1. Tree condition and frequency of occurrence. Vineyard Gardens, LLC. Pleasanton CA. Common Name Scientific Name Poor Condition Fair Good No. of Trees Heritage Bottlebrush Callistemon citrinus - 1 - 1 - Chinese hackberry Celtis sinensis - - 2 2 - English walnut Jug/ans regia 10 6 -- 16 2 Tobira Pittosporum tobira -- -- 1 1 -- Apricot Prunus armeniaca 1 - - 1 - Almond Prunus dulcis 1 3 2 6 - Black locust Robinia pseudoacacia 1 -- -- 1 1 Coast redwood Sequoia sempervirens -- 1 1 2 2 Total, all trees surveyed 13 11 6 30 43% 37% 20% 100% Total, Heritage 5 Suitability for Preservation Before evaluating the impacts that will occur during development, it is important to consider the quality of the tree resource itself, and the potential for individual trees to function well over an extended length of time. Trees that are preserved on development sites must be carefully selected to make sure that they may survive development impacts, adapt to a new environment and perform well in the landscape. Our goal is to identify trees that have the potential for long-term health, structural stability and longevity. For trees growing in open fields, away from areas where people and property are present, structural defects and/or poor health presents a low risk of damage or injury if they fail. However, we must be concerned about safety in use areas. Therefore, where development encroaches into existing plantings, we must consider their structural stability as well as their potential to grow and thrive in a new environment. Where development will not occur, the normal life cycles of decline, structural failure and death should be allowed to continue. Evaluation of suitability for preservation considers several factors: ^ Tree health Healthy, vigorous trees are better able to tolerate impacts such as root injury, demolition of existing structures, changes in soil grade and moisture, and soil compaction than are non-vigorous trees. ^ Structural integrity Trees with significant amounts of wood decay and other structural defects that cannot be corrected are likely to fail. Such trees should not be preserved in areas where damage to people or property is likely.