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TR-2022-023 - West Coast Arborists Peer Review_10500 N De Anza N^oCA' xPment Department Wes Coast Ar orists Inc.—City of Cupertino—Peer Review Alder Removal TrcP�dJrl�Il'hgJ�ls�l<I kk4�11S�r 6 ilyt�l�iLE ities Who Care About Trees 8.4.22 Kelley Gilleran CUPERTINO APPROVED Case# TR-2022-023 A uun u_0RIST REPORT Application Number(s) Approval Body: Director/ Staff CUPERTINO, CA Approva I Datea Signature Catherine Tarone City of Claar- ATTN:Catherine Tarone 10300 Torre Ave. Cupertino, CA 95014 Phone: (408) 777-3297 Email: catherinet@cupertino.org Re: Peer Review of Arborist Report for Alder Removal at 10500 N. De Anza Blvd. SCOPE OF WORK The purpose of this report is to provide a peer review of an arborist report submitted to the City of Cupertino by Deva Braden, a consulting arborist with Wood Architecture, evaluating the current condition of one White Alder(Alnus rhombifolia) tree. I performed a ground-level visual inspection of the subject trees and reviewed the supplied arborist report. OBSERVATIONS I visited the site on Tuesday, August 2nd, 2022, and my findings are as follows: Nt-' Ini - i A&- The red arrow in the above image depicts the general location of the subject tree. I lPage N^oCAxpment Department Wes Coast Ar orists Inc.—City of Cupertino—Peer Review Alder Removal Trc��dJrl�Il'hg�J�ls�l<I kk4�11S�r 6 ilyt�l�iLE ities Who Care About Trees 8.4.22 Kelley Gilleran CUPERTINQ APPROVED Case # TR-2022-023 d' Approval Bod Approva I Date 1 Signature r � 4 t s-, View of the subject tree from the north side. The tree has a heavy lean to the west, likely due to phototropism (growing towards the light). r y � The area outlined in red in the photo above has been compromised by pathogenic wood-decaying fungus showing signs of cubical brown rot. 2 1 P a g e N^oCA' xPment Department Wes Coast Ar orists Inc.—City of Cupertino—Peer Review Alder Removal Trc��dJrl�Il'hg�J�ls�l<I kk4�11S�r 6 ilyt�l�iLE ities Who Care About Trees 8.4.22 Kelley Gilleran CUPERTINQ APPROVED Case # CONtsl1 I w99q§ktls'd WTMO',City of Cupertino the following three questions about the report Approval BociywateDir by ge§e Braden. My responses are below in red text. Approval Date ps1V9� 2 , ,.fthe,�,..,,+,� �e��.�ui.;,.. of the white alder tree and the arborist report's Signature Catherinstlit that the tree is in irreversible decline despite the tree having living € 4orthe crown. Do you agree with the need to remove this white alder? Yes. There is a pathogenic wood-decaying fungus present (most likely sulphur fungus), causing cubical brown rot of the heartwood of the subject tree. The canopy remains green because the fungus does not break down the sapwood, which allows the tree to stay green while the inner structural wood becomes the consistency of a breadstick. This situation causes unpredictable failures of branches or the entire tree during adverse weather conditions or otherwise. 2. Your evaluation of the arborist's proposed replacement tree, a 36-inch box Silver Leaf Oak, (Quercus hypoleucoides) in the same location. The arborist states that Silver Leaf Oak is a good candidate for a replacement tree due to enhanced suitability for current environmental conditions. I agree with the recommendation for a replacement species. 3. Do you have any suggestions or concerns you see with the removal or replacement overall? No, I agree with the assessment. In my professional opinion, the report submitted to the City of Cupertino by Deva Braden with Wood Architecture was accurate. The new species selection for the replacement tree is an acceptable species and location. Thank you for the opportunity to assist you in your arboricultural needs. If you have any questions or concerns, please contact me at (916) 417-1979. Respectfully, Kelley Gilleran ASCA Registered Consulting Arborist #688 ISA Board Certified Master Arborist #WE7061-BM 31Page N^oCA' xPment Department Wes Coast Arborists Inc.—City of Cupertino—Peer Review Alder Removal Trc��d171r�I1'hg�J�ls�l<I kk4�11S�r 6 ilyt�l�iLE ities Who Care About Trees 8.4.22 Kelley Gilleran CUPERTINO APPROVED Case # TR-2022-023 Application Number(s)ASSUMPTIONS AND LIMITING CONDITIONS Approval Body: Director/Staff Approval Date'.CaE&4022 taken to obtain all information from reliable sources.All data has been verified insofar as posse e;tiowever,Me Consultant can neither guarantee nor be responsible for the Signature iaCpef fifo►t%tion provided by others. Case Manager 2.The Consultant will not be required to give testimony or to attend court by reason of this report unless subsequent contractual arrangements are made,including payment of an additional fee for such services as described in the fee schedule and contract of engagement. 3.Loss or alteration of any part of this report invalidates the entire report. 4.Possession of this report or a copy thereof does not imply right of publication or use for any purpose by any other than the person to whom it is addressed,without the prior written consent of the Consultant. 5.This report and any values expressed herein represent the opinion of the Consultant,and the Consultant's fee is in no way contingent upon the reporting of a stipulated result,a specified value,the occurrence of a subsequent event,nor upon any finding to be reported. 6.Unless expressed otherwise: 1)information contained in this report covers only those items that were examined and reflects the condition of those items at the time of inspection;and 2)the inspection is limited to visual examination of accessible items without dissection,excavation,or coring.There is no warranty or guarantee,expressed or implied,that problems or deficiencies of the tree(s)or property in question may not arise in the future. 7.Arborists are tree specialists who use their education,knowledge,training,and experience to examine trees,recommend measures to enhance the beauty and health of trees,and attempt to reduce the risk of living near trees.It is highly recommended that you follow the arborist recommendations;however,you may choose to accept or disregard the recommendations and/or seek additional advice. 8. Arborists cannot detect every condition that could possibly lead to the structural failure of a tree. Trees are living organisms that fail in ways we do not fully understand.Conditions are often hidden within trees and below ground.Arborists cannot guarantee that a tree will be healthy or safe under all circumstances,or for a specific period of time.Likewise,remedial treatments performed cannot be guaranteed. 9.Any recommendations and/or performed treatments(including,but not limited to,pruning or removal)of trees may involve considerations beyond the scope of the arborist's services,such as property boundaries,property ownership,site lines,disputes between neighbors,and any other related issues.Arborists cannot take such considerations into account unless complete and accurate information is disclosed to the arborist.An arborist can then be expected to consider and reasonably rely on the completeness and accuracy of the information provided. 10.Trees can be managed,but they cannot be controlled.To live near trees is to accept some degree of risk.Trees carry risk.The only way to eliminate all risks associated with trees is to eliminate all trees. 4 Page