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<br />Tree Report, Vineyard Townhome Condominiums <br />Pleasanton, CA <br />September 15,2005 <br /> <br />HortScience, Inc. <br />Page 3 <br /> <br />Table 1. Species composition and frequency of occurrence. 3909 Vineyard Avenue, <br />Pleasanton CA. <br /> <br />Common Name Scientific Name Condition No. of Trees <br /> Poor Fair Good Heritage <br />Box elder Acer negundo 1 1 <br />White alder Ainus rhombifolia 1 1 <br />Loquat Eriobotrya japonica 1 1 2 <br />Silver dollar gum Eucalyptus polyanthemos 2 2 2 <br />Raywood ash Fraxinus angustifolia 'Raywood' 3 5 8 <br />Evergreen ash Fraxinus uhdei 1 1 <br />Calif. black walnut Juglans hindsii 4 12 16 6 <br />English walnut Juglans regia 1 1 <br />Sweetgum Liquidambar styracif/ua 1 4 5 5 <br />Canary Island pine Pinus canariensis 2 2 2 <br />Western sycamore Platanus racemosa 1 1 1 <br />Fremont cottonwood Populus fremontii 2 1 3 1 <br />Almond Prunus dulcis 3 1 4 2 <br />Coast live oak Quercus agrifolia 1 1 <br />Valley oak Quercus lobata 7 7 1 <br />Siberian elm Ulmus pumila 1 2 3 2 <br />Total, all trees surveyed 12 28 18 58 <br /> 21% 48% 31% 100% <br />Total, Heritage 22 <br /> <br />Suitability for Preservation <br />Before evaluating the impacts that will occur during developmen~ it is important to consider the <br />quality of the tree resource itself, and the potential for individual trees to function well over an <br />extended length of time. Trees that are preserved on development sites must be carefully <br />selected to make sure that they may survive development impacts, adapt to a new environment <br />and perform well in the landscape. <br /> <br />Our goal is to identify trees that have the potential for long-term health, structural stability and <br />longevity. For trees growing in open fields, away from areas where people and property are <br />present, structural defects and/or poor heaith presents a low risk of damage or injury if they fail. <br />However, we must be concerned about safety in use areas. Therefore, where development <br />encroaches into existing plantings, we must consider their structural stability as well as their <br />potential to grow and thrive in a new environment. Where development will not occur. the <br />normal life cycles of decline. structural failure and death should be allowed to continue. <br /> <br />Evaluation of suitability for preservation considers several factors: <br /> <br />. Tree health <br />Healthy, vigorous trees are better able to tolerate impacts such as root injury, demolition <br />of existing structures, changes in soil grade and moisture, and soil compaction than are <br />non-vigorous trees. <br />