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Tree Report, 218 Ray Street, Pleasanton Ed Brennan, Consulting Arborist
<br /> February 12, 2020 Page 5
<br /> Tree Appraisals
<br /> The trees were appraised using the trunk formula technique found in the Guide for Plant
<br /> Appraisal, 10th edition (Atlanta GA: 2019, International Society of Arboriculture). A regional
<br /> companion publication, Species Classification and Group Assignment(2004, Western
<br /> Chapter-International Society of Arboriculture), was also used. The value of landscape trees
<br /> and plants is based upon four factors: size, condition, functional limitations, and external
<br /> limitations. Size is measured as trunk diameter, at 54"above grade. The components of
<br /> condition are health, structural integrity, and form. Functional limitations are factors
<br /> associated with the interaction of a tree with its planting site, for instance, overhead utility
<br /> lines may limit its future growth. External limitations are factors outside of the property that
<br /> will limit the plant's development in the foreseeable future, such as view or solar access
<br /> ordinances.
<br /> Applying the above-described method to the seventeen trees surveyed yielded an aggregate
<br /> total value of$16,780 (U.S. dollars). Values for individual trees are shown in the table
<br /> below.
<br /> Table 6: Tree Appraisals
<br /> Tree No. Species Trunk Appraised
<br /> diameter Value
<br /> 1 Bradford pear 11 $690
<br /> 2 Bradford pear 8 $510
<br /> 3 Bradford pear 6 $290
<br /> 4 Bradford pear 9 $470
<br /> 5 Bradford pear 10 $570
<br /> 6 Valley oak 6 $650
<br /> 7 Pecan 25 $13,600
<br /> Tree Preservation Guidelines
<br /> Certain trees will be designated for preservation based on their suitability for preservation and
<br /> location relative to the development plan. Once those decisions have been made, the
<br /> following recommendations will help reduce impacts to trees from development and maintain
<br /> and improve their health and vitality through the clearing, grading and construction phases.
<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 /> 218 Ray Street is an already-developed site. Tree roots will be protected from damage by the
<br /> existing parking lot pavement. Above-ground portions of the trees are subject to damage by
<br /> construction vehicles and equipment.
<br />are better
<br /> able to generate new tissue and respond to change. The potential longevity of the
<br /> Monterey pines is low because of the mature age and infection with pitch canker.
<br /> generally are unsuited for use areas.
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<br /> o 0.075 0.'5 mi P20-0568, 218 RAY ST, NAG U I BMftelISISM
<br /> Planning Division
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<br /> 0 4110 820 Feet l August 17,2ozo ['L-EA AN foN.
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