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<br />10 <br /> <br />A. Tree Protection Objectives <br />The objective of this section is to reduce the negative effects of construction on trees to a less <br />than significant level. Tree protection should begin before construction starts. Successful tree <br />preservation occurs when designers, construction personnel, and project managers are <br />committed to tree preservation. All members of the project team must be familiar with the <br />rudimentary aspects of tree growth and development in order to understand the relationship <br />between tree survival and construction practices. Utilization of an arborist will ensure everyone is <br />understanding of the needs regarding trees. <br /> <br />All trees should try to be preserved. Trees that are structurally unstable, dead, in poor health, or <br />unable to survive the effects of construction become a liability to the project and may have to be <br />removed. <br /> <br />B. Site Plan <br />For all projects, Site Plans must indicate accurately plotted trunk locations and the Tree Protection <br />Zone (TPZ) of all trees or group of trees to be preserved within the development area. <br />Additionally, for all trees within the development area, the plans shall accurately show the trunk <br />diameter, dripline and clearly identify the TPZ. The type of protective fencing shall be specified <br />and indicated with a bold dashed line. <br /> <br />Site Plans shall also include the following minimum information: <br />1. Surveyed tree locations, species, size (height, width, DBH). Dripline Area (including <br />trees located on neighboring property that overhang or within 25 feet of the project site) <br />and City Trees adjacent to the project site <br />2. Paving, concrete, Trenching, or grade change (including the limits of over -excavation) <br />located within the Tree Protection Zone <br />3. Existing and proposed utility easements <br />4. Surface and subsurface drainage and aeration systems to be used <br />5. Walls, tree wells, retaining walls and grade change barriers, both temporary and <br />permanent <br />6. Landscaping, irrigation and lighting within dripline of trees, including all lines, valves, etc. <br /> <br />Tree Protection Zone <br />During the design phase of the project the Project Manager shall contact the City Arborist to <br />develop a TPZ for each tree impacted by the project. If an unresolved disagreement arises <br />between the Certified Arborist and the project manager on the size of a TPZ for a tree, the <br />dispute shall be brought to the Director of Public Works and/or City Engineer, who will render a <br />final decision on the size of the TPZ. <br /> <br />Each tree to be retained shall have a designated TPZ identifying the area sufficiently large enough <br />to protect it and its roots. The TPZ shall be shown on all Site Plans including, Demolition, Grading, <br />Irrigation, Electrical, Landscape, etc. Improvements or activities such as paving, utility and <br />irrigation Trenching including other ancillary activities shall occur outside the TPZ, unless <br />otherwise specified. The protection fence shall serve as the TPZ. <br /> <br />Section 4: Protection of Trees <br />During Construction