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<br />Tree Report, Vineyard Townhome Condominiums
<br />Pleasanton, CA
<br />September 15, 2005
<br />
<br />HortScience. Inc.
<br />Page 6
<br />
<br />Table 2: Tree with Poor Suitability for Preservation
<br /> (continued)
<br />Tree No. Species Diameter Heritage
<br /> (in.) Tree?
<br />29 Siberian elm 10,9 Yes
<br />30 Calif. black walnut 6,5,5,5,5 No
<br />31 Calif. black walnut 39 Yes
<br />32 Sweet gum 16 Yes
<br />33 Sweet gum 14 Yes
<br />34 Sweet gum 14 Yes
<br />35 Sweet gum 10 Yes
<br />40 Calif. black walnut 6,6,6,3,3,2 No
<br />41 Calif. black walnut 6,5,4,4,3,3 No
<br />42 English walnut 9.9,7.6 No
<br />43 Calif. black walnut 9 No
<br />47 White alder 9 No
<br />48 Almond 13,12,6,5 Yes
<br />49 Calif. black walnut 35 Yes
<br />50 Calif. black walnut 43 Yes
<br />54 Calif. black walnut 7,6.6,5,5,5,5,5 No
<br />55 Box elder 6,5,5 No
<br />56 Calif. black walnut 18 Yes
<br />58 Calif. black walnut 13,7 No
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<br />Evaluation of Impacts and Recommendations for Preservation
<br />Appropriate tree retention develops a practical match between the location and intensity of
<br />construction activities and the quality and health of trees. The Tree Survey Form was the
<br />reference point for tree condition and quality. Potential impacts from construction were
<br />evaluated using the Conceptual Site Plans by KTGY Group, Inc. (July 29, 2005), the Grading
<br />Plan by Civil Engineering Associates (August 22, 2005) and the Landscape Plan by Smith &
<br />Smith (August 30, 2005).
<br />
<br />The plans depicted the proposed footprint for 45 residential units, underground garages.
<br />driveways, streets, utilities (eg. storm drain, water and sewer) and landscaped areas. A bio-
<br />swale is proposed near the west property line. Plans showed tree canopies, trunk locations and
<br />trunk elevations. Proposed elevations for building pads and spot elevations were included.
<br />Underground utilities on-site were not available.
<br />
<br />Impacts to trees will occur in several ways. Demolition of existing site improvements such as
<br />fences, hidden features and existing utilities may damage both tree roots and crowns. Providing
<br />access for construction may require pruning of tree crowns. Excavation for the underground
<br />garages, retaining walls and grading may damage tree roots both directly through mechanical
<br />injury, and indirectly by altering soil structure, drainage, and biology.
<br />
<br />Using these Plans potential impacts from construction were estimated for each tree. The most
<br />significant impacts to the trees would occur as a result of the demolition, grading and
<br />construction for building pads, underground garages, retaining walls, streets, driveways, and
<br />utilities. Based upon our evaluation of the Plans, I recommend the preservation of 14 trees, 2
<br />on-site and 12 off-site (Table 3). This includes 11 Heritage trees (1 on-site and 10 off-site).
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