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<br />Preliminary Tree Report, 3459 Foothill Rd.. Pleasanton <br />April 2, 2004 <br /> <br />HortScience, Inc. <br />Page 9 <br /> <br />Preliminary Tree Preservation Guidelines <br />The goal of tree preservation is not merely tree survival during development but maintenance <br />of tree health and beauty for many years. Trees retained on sites that are either subject to <br />extensive injury during construction or are inadequately maintained become a liability rather <br />than an asset. The response of individual trees will depend on the amount of excavation and <br />grading, the care with which demolition is undertaken. and the construction methods. <br />Coordinating any construction activity inside the TREE PROTECTION ZONE can minimize these <br />impacts. <br /> <br />The following recommendations will help reduce impacts to trees from development and <br />maintain and improve their health and vitality through the clearing, grading and construction <br />phases. <br /> <br />Design recommendations <br /> <br />1. Accurately locate the trunks of all trees to be retained within building areas. <br /> <br />2. A TREE PROTECTION ZONE shall be established around each on-site tree to be <br />preserved. For preliminary design purposes, the TPZ shall be defined at the dripline. <br />No grading, excavation, construction or storage of materials shall occur within that <br />zone. . <br /> <br />3, No underground services including utilities, sub-drains, water or sewer shall be placed <br />in the TREE PROTECTION ZONE. <br /> <br />4. Tree Preservation Notes, prepared by the Consulting Arborist, should be included <br />on all plans. <br /> <br />5. Any herbicides placed under paving materials must be safe for use around trees and <br />labeled for that use. <br /> <br />6. Irrigation systems must be designed so that no trenching will occur within the TREE <br />PROTECTION ZONE.. <br /> <br />7. No irrigation shall be applied nor plantings installed within 10' of the trunks of oaks, . <br />buckeye, or walnuts. <br /> <br />Pre-constfuction treatments and recommendations <br />1. The construction superintendent shall meet with the Consulting Arborist before <br />beginning work to discuss work procedures and tree protection. <br /> <br />2. Fence all trees to be retained to completely enclose the TREE PROTECTION ZONE prior <br />to demolition, grubbing or grading. Fences shall be 6 ft. chain link or equivalent as <br />approved by consulting arborist. Fences are to remain until all grading and <br />construction is completed. <br /> <br />3. Prune trees to be preserved to clean the crown and to provide clearance. All pruning <br />shall be completed by a Certified Arborist or Tree Worker and adhere to the Tree <br />Pruning Guidelines of the International Society of Arboriculture. Brush shall be <br />chipped and spread beneath the trees within the TREE PROTECTION ZONE, <br /> <br />4. Trees to be removed that have canopies touching trees to remain shall be removed <br />by a Certified Arborist in a manner to avoid damage to remaining trees. The stumps <br />