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Tree Report, Vineyard Pass Subdivision HortScience, Inc. Pleasanton, CA Page 5 April 5, 2006 Table 2: Tree Suitability for Preservation, continued. Poor Trees in this category are in poor health or have significant defects in structure that cannot be abated with treatment. These trees can be expected to decline regardless of management. The species or individual tree may possess either characteristics that are undesirable in landscape settings or be unsuited for use areas. Fourteen (14) trees were rated as having poor suitability for preservation. Tree No. Species Diameter (in.) Heritage Tree? 66 Italian stone pine 14 No 69 Coast redwood 4,3 No 70 Italian stone pine 11,11 No 72 Italian stone pine 13,9 No 74 Italian stone pine 14 No 75 Italian stone pine 8 No 76 Italian stone pine 8 No 77 Fruitless mulberry 8 No 80 Fruitless mulberry 8 No 84 Giant sequoia 8 No 85 Fruitless mulberry 8 No 89 Italian stone pine 8 No 90 Monterey pine 10 No 92 {talian stone pine 9 No Evaluation of Impacts and Recommendations for Preservation Appropriate tree retention develops a practical match between the location and intensity of e construction activities and the quality and health of trees. The Tree Survey Form was the ~; reference point for tree condition and quality. Potential impacts from construction were evaluated using the Site Plan by M I Architects (September 6, 2005). The plan depicted the footprint of the existing house and proposed two story house. Anew deck will be located on the south side of the house. A patio and swimming pool are planned on the northwest side of the house. The driveway apron at the house will be enlarged. Surveyed tree locations were not shown on the Topographic Map by Govers Engineers (September 1, 2005). Impacts to trees will occur in several ways. Demolition of existing site improvements such as the house, driveway, walkways and hidden features may damage both tree roots and crowns. Providing access for construction may require pruning of tree crowns. Excavation and grading to construct the proposed improvements may damage tree roots both directly through mechanical injury, and indirectly by altering soil structure, drainage, and biology. Using these plans, potential impacts from construction were estimated for each tree. The most significant impacts to the trees would occur as a result of the demolition and construction for the house, driveway, deck, patio and pool. Based upon my evaluation of the Plans, I recommend preservation of 16 trees (Table 3, next page), including two Heritage trees (#71 and 91). Five (5) Italian stone pines (#70, 72, 74, 75 and 76), with poor suitability for preservation, were included in the trees recommended for preservation. They were located south of the house in the 30' wide setback area. I recommended their preservation for screening value between lot 1 and the Foxborough Estate development to the south. These pines do not threaten the new house and are located in a low use area. It would be appropriate to plant new trees between these pines and gradually remove the pines over the next five to seven years.