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Stevens Creek Redwood tree - Arborist ReportCommunity Development Department ARBORSTnLELTTE CUPERTINO APPROVED Case # Site Lod-tIRIii021-032 19925 3WWarWDP@-bkr61vd Approval Bou_iperbrector9/ tatf Approval Doug,~, 0,,1�?6/22 Signature SardE f, wlWnura ISA Certifie8';V6b %TWE-8094A Prepared For: SHP SCB, LLC Sand Hill Property Company 965 Page Mill Road Palo Alto, California 94304 Commercial Tree Care July 5t", 2021 Assignment My assignment was to perform a health and structural analysis of one Coast Redwood tree (Sequoia sempervirens) that is located at 19925 Stevens Creek Blvd in Cupertino at the side of the building. I was also to provide recommendations. 19925 Stevens Creek Blvd., Cupertino Community Development Department IrMwOm Bigo®ivision — Cupertino CUPERTINO The evaluaWpoKeAfte from the ground and the trees were not climbed. No tools or Case # equipm W2 ff2 f.r!iDo penetrate into the trees and no soil or tissue samples taken. No scans, such A ica i ewei e used during the evaluation Approva I 13jQilyolllicMkW16n Approva I D11te subWd$d61a%t Redwood tree has a DBH of 38.5 inches and has been planted with extreme Signature closreRreYWtXM the building. The tree is less than 5 feet away from the building and has started to ccawaipf.pastructure damage. Redwood tree species require an extensive area for viable rooting space of which this location does not provide. This particular species of tree requires a large area for the rooting system to grow to the appropriate size in order to support the weight of the canopy. A trees ability to grow in a healthy manner is largely dependent on the available rooting space. A healthy tree can grow roots twice the length of the width of the canopy. Due to the confined rooting area caused by the building, there is not enough sustainable rooting space for the subject tree to develop properly. The roots are forced to grow under the concrete and building creating uplifted areas, infrastructure damage and liability tripping hazards for the tenants. P? + I� f , I 1'19� µ . - x,c +. Community Development Department DP-IjT.m9p'rgnR! iOzICL-3CtuW. wromd trees 'CUPERTINQ Redwood trApppf MVpr) of the world's largest and tallest growing tree species. They also are Case # considerfAt2021r growers; and can grow up to 3 feet in one year. They are often planted by ianca �.� ��»ae (5 nut Ieaiicinp, their extensive crown growth potential and wide spreading rooting systems. Even though a Redwood is very beautiful tree, it is not ideal for complexes that Approval B9?LdW)PMkOcffnb5Wfispace for the size potential of this species. Even in "average" soil Approval Dateditid►�Y,U (wood can quickly overwhelm the surrounding area clogging drains, damaging Signature sidejyq� ,lFsaih% pg cracks in dwelling units and uplifting asphalt. This particular tree has managed tQadpK .,, ,damage and costly repairs will need to be made. This subject tree has reached a size that is detrimental to the building. Not only is there not enough adequate rooting space, in addition, there is not enough canopy space available. This tree has been side pruned for building clearance, which, if continued to do so, will unbalance to canopy. r. -'' Or 9 a F, iL Community Development Department PMgna0 lbi*RWa i : CUPERTINO Due to the ffqppA* Redwood tree will only grow larger and continue to cause damage to Case # ���� � the buil recommended. Once the tree is removed the property management wouldu r 5 le tree species in, and would also like to complete any repairs on the building. Permanent irrigation with fast drainage is essential for the health of a Approva I l3pcdV:i lttor / Staff Approva I Date 01 /26/22 Signature PLAN iINKGO 19925 Stevens Creek Blvd., Cupertino Respectfully submitted, Sara McMahon. Saran WMa�- - ISA Certified Arborist WE-8094A Arborists are tree specialists who use their education, knowledge, training, and expertise to examine trees, recommend measures to enhance the beauty and health of trees, and attempt to reduce risk of living near trees. Clients may choose to accept or disregard the recommendations of the arborist, or to seek additional advice. Arborists cannot detect every condition that could possibly lead to the structure 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 the 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, like medicine, cannot be guaranteed. Trees can be managed, but they cannot be controlled. To live near trees is to accept some degree of risk. The only way to eliminate all risk associated with trees is to eliminate all trees.