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Tree Report. December 7, 2020. <br />Hidden Canyon (Lester property). Ponderosa Homes. <br />HortScience I Bartlett Consulting <br />Page 8 <br />Recommendations for action <br />should be considered <br />preliminary in areas of dense <br />tree canopy. Final <br />determinations will be made <br />when grading and improvements <br />are staked in the field. In <br />addition, pruning to trees to <br />remain will be required, <br />particularly along Dublin Canyon <br />Road where tree canopies <br />extend over the existing <br />roadway (Photo 3). <br />Estimate of Tree Value <br />Photo 3. Looking east along Dublin Canyon Road <br />where the street will be widened and a retaining wall <br />installed. <br />The City of Pleasanton requires that the value of trees "included in the tree report <br />affected by the development which are required to remain" (section17.16.050 "#6) be <br />established. To establish the value of the surveyed trees, I employed the standard <br />methods found in Guide for Plant Appraisal, 9th edition (published in 2000 by the <br />International Society of Arboriculture, Savoy IL). In addition, I referred to Species <br />Classification and Group Assignment (2004), a publication of the Western Chapter of <br />the International Society of Arboriculture. These two documents outline the methods <br />employed in tree appraisal. <br />I used the trunk formula method to estimate the replacement cost of each tree. The <br />replacement cost is based on four factors: size, species, condition and location. Size is <br />measured as trunk diameter, normally 54" above grade. The species factor considers the <br />adaptability and appropriateness of the plant in the East Bay area. The Species <br />Classification and Group Assignment lists recommended species ratings and <br />evaluations. Condition reflects the health and structural integrity of the individual. The <br />location factor considers the site, placement and contribution of the tree in its surrounding <br />landscape. <br />The estimated value of the 147 trees recommended for preservation is $507,900 (Table <br />3). This includes both Heritage and non-Heritage trees. The value of the 61 trees <br />recommended for removal is $122,750.