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i <br /> 8.A <br /> Page 95 <br /> c <br /> 1��� Walter Levison �� <br /> � CONSULTI R ..__. .,._.. <br /> NG A BORIST ,�-... <br /> PNW-�SA Tree Risk Assessor #593 ASCA Re istered ConsulGn Arborist i�401 ISA Certified Arborist #WC-3172 <br /> 1.0 Summary <br /> A. Tree #1 is a front yard coast live oak (Quercus agrifolia� with codominant mainstems <br /> measuring 11.1 and 7.3 inches at 4.5 feet above grade (see map below in this report <br /> for location). The tree is valued at $3,280 per the author's appraisal worksheet attached, <br /> and can easily be retained and protected behind chain link tree protection zone (TPZ) <br /> fencing erected at approximately 15 feet out from trunk. <br /> This tree stands approximately 25 feet in height with a total canopy diameter of 30 feet. <br /> Using scales from 0-100% each, it has a health rating of 75% and a structural rating of <br /> 75%, for an overall condition rating of 75% or "Good". This tree exhibits good live hvig <br /> density and extension. <br /> The tree's root system has expanded below the existing concrete drive apron and <br /> sidewafk slabs, causing severe buckling and cracking. An arborist should be retained to <br /> monitor demolition of these materials, and demolition should be performed using small <br /> tools only (e.g. jackhammer). <br /> B. Tree #2 is a front yard coast redwood (Sequoia sempervirens} with codominant <br /> mainstems measuring 18.0 and 14.0 inches at 4.5 feet above grade. The tree is <br /> valuated at $4,050. It can be retained and protected using chain link fence at distances <br /> as far as possible out from trunk. <br /> The tree stands 55 feet in height with a total canopy spread of 25 feet. The tree rates out <br /> with a health of 35% and a structure ot 45%, for an overall condition rating of 40% or <br /> "Poor". It exhibits only poor to moderate live twig density and extension. <br /> There does not appear to be significant imigation applied to this tree, so there is likely <br /> significant soil moisture deficit ("drought stress") throughout the tree's root zone. <br /> Irrigation during site plan development may boost vigor and increase this tree's overall <br /> condition by 10 to 20 points. <br /> The current open soil root zone area ranges in size from 8 to 15 feet radius around the <br /> tree. The chain link TPZ should be erected near the proposed driveway and over the <br /> proposed porch area. The fence can be moved closer to the tree just prior to starting the <br /> porch work assumably at the end of project. <br /> C. Tree #3 is a front yard Italian stone pine (Pinus pinea) measuring 21 inches at 4.5 feet <br /> above grade. It is proposed to be removed due to its location in very close proximity to <br /> proposed work. It is valuated at $3,190. <br /> ' This height is not the elevation which City of Redwood City prefers trees to be measured at. However, <br /> for monetary appraisal, this is the correct hei ht to determine trunk cross sectional areas <br /> 3of14 <br /> Site Address: 448 Saint Francis Version: 08272010 <br /> Walter Levison O All Rights Reserved <br /> Registered Member, American Sociery of Consulting Arborists and Member of the International Society of Arboriculture <br /> Phone/Fax (650) 687-0990 <br />