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AUGUSTIN BERNAL MOUNTAIN BIKE TRAIL PROJECT DRAFT INITIAL STUDY Policy 2: Preserve heritage trees throughout the Planning Area. • Program 2.1: Strongly encourage preservation of heritage trees; where preservation is not feasible, the City will require tree replacement or a contribution to the Urban Forestry Fund. Allow no net loss of trees. • Program 2.2: Follow the provisions of the City's Heritage Tree Ordinance, Pleasanton Municipal Code Chapter 17.16, Tree Preservation, when reviewing future development p roj ects. Policy 3: Preserve and enhance streambeds and channels in a natural state. Pleasanton Municipal Code Chapter 17.16 Tree Preservation Ordinance The City's Tree Preservation Ordinance is intended to identify and preserve trees that enhance natural scenic beauty, promote quality development,maintain ecology, moderate effects of extreme temperatures, create identity, and combat air pollution through oxygen output. The Tree Preservation Ordinance also regulates under what circumstances and permitting procedures heritage trees may be removed,and how existing heritage trees should be protected during construction activities. The Tree Preservation Ordinance defines a Heritage Tree as any species of tree that meets any of the following(City of Pleasanton 2021): 1. Any single-trunked tree with a circumference of 55 inches or more measured four and one-half feet above ground level. 2. Any multi-trunked tree of which the two largest trunks have a circumference of 55 inches or more measured four and one-half feet above ground level. 3. Any tree 35 feet or more in height. 4. Any tree of particular historical significance specifically designated by official action. 5. A stand of trees, the nature of which makes each dependent upon the other for survival or the area's natural beauty. The Tree Preservation Ordinance requires the following construction performance standards to protect Heritage Trees(City of Pleasanton 2021): A. Prior to the commencement of construction, install a sturdy fence at the dripline of any tree which will be affected by the construction and prohibit any storage of construction materials or other materials inside the fence. The dripline shall not be altered in any way so as to increase the encroachment of the construction. B. Prohibit excavation, grading, drainage and leveling within the dripline of the tree unless approved by the director. C. Prohibit disposal or depositing of oil, gasoline, chemicals or other harmful materials within the dripline or in drainage channels,swales or areas that may lead to the dripline. 12956 DUDEK 41 April 2022