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Sam Oakley <br />231 Old Bernal Avenue Tree Inventory, Valuation, and Construction Guidelines <br />9/13/2024 3 <br /> <br /> <br />PO BOX 2412 <br />PISMO BEACH, CA 93448 <br /> <br /> (415) 407-6995 <br />SAM@OAKLEYGROUP.ORG <br />WWW.OAKLEYGROUP.ORG <br /> <br />• 2, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, & 34 <br />Appraisal <br /> <br />The purpose of this section is to provide the trees’ appraised value in respect to their <br />current conditions and location. The value of the tree was determined using the standard <br />methods found in the Guide for Plant Appraisal, 10th edition (republished in 2020 by the <br />International Society of Arboriculture, Champaign IL). In addition, the Species <br />Classification and Group Assignment (1992), a publication of the Western Chapter of the <br />International Society of Arboriculture, was also used to determine the species value. <br /> <br />Appraisal Information <br /> <br />Appraise value of the tree was determined using the CTLA Trunk Formula Method, which <br />is a hybrid appraising method derived from the Replacement Cost Method that extends the <br />replacement costs to large diameter individuals. This method is widely accepted by <br />professionals in the “green” industries, as well as the real estate and legal disciplines. The <br />formula is as follows: <br /> <br />Tree Value =Base Value * Cross Sectional Area * Species Class * Condition * Location <br /> <br />Location: each tree was assigned a location value according to The Guide for Plant <br />Appraisal, which includes the average of the site rating (10 to 100 percent), contribution <br />rating (10 to 100 percent), and placement rating (10 to 100 percent). Because the trees are <br />situated within a continuous landscape, the above ratings were assigned the following: <br /> <br />• Site: the property is high-quality, with scenic views – 80% <br /> <br />• Contribution: the trees potentially block the visibility of the views from the <br />proposed structure – 20% <br /> <br />• Placement: the trees are native, volunteer trees that have naturally grown <br />on the hill; a history of branch failures, in conjunction with <br />significant leans and limbs overhanging the parking <br />area/roadway, elevates the hazard risk of the trees – 20% <br /> <br />(Site + Contribution + Placement) ÷ 3 = Location rating <br />e.g.: (80% + 20% + 20%) ÷ 3 = 40% <br /> <br />Species: each tree was assigned values according to the species value corrected by the <br />regional supplement for California, Species Classification and Group Assignment, <br />available from the Western Chapter of the International Society of Arboriculture. <br />Page 337 of 373