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TR-2014-06b OFFICE OF COMMUNITY DEVELOPMENT CITY HALL 10300 TORRE AVENUE•CUPERTINO, CA 95014-3255 C U P E RT 1 N 4 (408) 777-3308 • FAX (408)777-3333•planning(c�cuqertino.orq February 18, 2014 Sarah Hon A Plus Tree Service 5125 Port Chicago Hwy Concord, CA 94520 SUBJECT: TREE REMOVAL PERMIT ACTION LETTER—Application TR-2014-06 This letter confirms the decision of the Director of Community Development, given on February 18th, 2014, approving a Tree Removal Permit to allow the removal and replacement of two (2) hazardous Silk Oak trees at an existing apartment complex, located at 10159 S Blaney Ave. The application is approved with the following conditions: 1. APPROVED PROTECT This approval is based on the arborist report prepared by Sarah Hon (WE-9519A), dated January 16t'', 2014, consisting of 4 pages, a tree removal plan, and a replacement plan, except as may be amended by conditions in this resolution. 2. TREE REPLACEMENTS The applicant is required to plant four (4) 24-inch box Acer Rubrum 'Armstrong' replacement trees in accordance with the Protected Tree Ordinance and approved tree replacement plan. Modifications to the tree species and location may be made to the approved replacement plan pending staff approvaL The replacement trees shall be planted within 30 days of the effective approval date of this tree removal permit. 3. NOTICE OF FEES DEDICATIONS RESERVATIONS OR OTHER EXACTIONS The Conditions of Project Approval set forth herein may include certain fees, dedication requirements, reservation requirements, and other exactions. Pursuant to Government Code Section 66020(d) (1), these Conditions constitute written notice of a statement of the amount of such fees, and a description of the dedications, reservations, and other exactions. You are hereby further notified that the 90-day approval period in which you may protest these fees, dedications, reservations, and other exactions, pursuant to Government Code Section 66020(a), has begun. If you fail to file a protest within this 90-day period complying with all of the requirements of Section 66020,you will be legally barred from later challenging such exactions. Staff has made the findings necessary to grant the tree removal permit in accordance with Section 14.18.120 of the Protected Trees Ordinance. Sincerely, Simon Vuong, AI P Associate Planner (408) 777-1356 simonv@cupertino.org Enclosure: Arborist Report CC:Anthony DeShaw,Biltmore Apartments,10159 S Blaney Ave,Cupertino,CA 95014 �� � • P L U S Arborist Report for i � 10159 S. Blaney Ave �� T'REE SERVICE� reparedby NOT YOUR AVERAGE TREE SERVIC �"1 rah Hon �1�� I ' d Arborist WE-9519A i����J 5125 Port Chicago Hwy Concord,Ca 94520 �p,N 21 2014 (866)815-2525 sarah@aplustree.com www.aplustree.com �Y. �� Prepared on January 16th, 2014 Background This report is concerning two(2)trees located at 10159 S.Blaney Ave,Cupertino,CA.The property is known as The Biltmore Apartments,owned and managed by Prometheus Real Estate Information Group,Inc. On January 8th,2014 while I was performing a property inspection at Biltmore,I noticed a Silk Oak,Grevillea robusta, (about 16"in Diameter)that had large colonies of mushrooms at the base of the tree and along the root lines.Fungal growth is an indication of decay,which usually is evidence of root rot,which this species of tree is prone to.In my experience,any indication of root rot is code red for removal.The anchoring roots are significantly compromised as well as the stability of the tree,creating an immediate hazard.For the size and location of this tree(between 2 apartment buildings and adjacent to a sidewalk)),damage to property and/or persons in the event of a failure is likely. To be sure that the fungus did indeed originate from the roots and not just from topsoil or mulch that may have had mushroom spores,on the following Tuesday,January 14th,2014,I scheduled a crew to perform a root excavation.During the root excavation,the on-site Arborist confirmed that the tree had root rot,stating that anchoring roots just below the surface were"crumbling in his hands".He confirmed that enough of the root system had been compromised that the tree must be taken down as it was deemed a hazard.He also continued the excavation with the neighboring Silk Oak and also confirmed this was suffering from the same problem and will also need to be removed immediately. Both Silk Oaks were removed on the same day as the root excavation,lanuary 14th,2014 Assignment (and Root excavation was done on the following two(2)trees: any limiting A.SilkOak-Grevillearobusta, 16" DBH(50"Circumference) factors) B.Silk Oak-Grevillea robusta, 17"DBH (53"Circumference) Observations Please see photos in Attachment I for further observations. Testing and Visual inspection,root/soil excavation. Analysis �si�S r����i�. �_�..�.:.Q`�C/�.,._�.� .z_.�.. s;. J�g_�� ,. �ISCUSS1011 Silk Oaks are susceptible to Phytophthora and root rot and may succumb to these given the right conditions,particularly moist soil that is not well drained.Root rot is the decay of anchoring and/or fibrous roots underneath the soil.In this case,the mushroom growth indicated decay in the roots.The root excavation confirmed that the anchoring roots indeed had root rot. When the trees have root rot,the stability of the tree is compromised and is absolutely a hazard. Since the tree can no longer support the weight in the crown,tree failure is only a matter of time. Often the crown can be quite healthy looking if the root rot was primarily affecting the anchoring roots and not the fibrous roots. Recommendations Upon excavation,the trees were deemed unsafe with potential damage to property and injure persons..Immediate removal was a necessary course of action. 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