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TR-2017-31 Arborist Report.pdf A • PL� US GROW YOUR FOREST IN THE CLOUD Arborist Report for 10159 South Blaney Prepared on 06/14/2017 Revised 08/31/2017 Prepared by Sarah Hon Gaskin ISA Certified Arborist W E-9519A 1900 Bates Ave.Suite L Concord,CA 94520 (866)815-2525 sarahC�aplustree.com www.aplustree.com Background I, Sarah Hon Gaskin, ISA Certified Arborist with A Plus, have been the managing Arborist for Prometheus Real Estate Group's owned and managed properties since 2012. Over the course of my Information assignment, I have been managing the properties with an overall view of their urban forest health as a whole. Not only are species diversity and age diversity important factors, but also long-term planning in terms of future growth, liability and sustainable practices with the current species population. Keeping this is in mind,the Red Ironbark Eucalyptus (Eucalyptus sideroxylon) is one species I've been working to phase out from their landscape since 2012 due to the hazardous nature and poor structure of that particular species. We have been phasing out this species on this particular property,The Biltmore Apartments, located at 10159 South Blaney and are in the last phase of removals. In addition to the remaining Red Ironbark Eucalyptus on this property,there is a row of five (5) Eucalyptus trees on the on the adjacent property, Safari Kid Daycare, who's tree roots are in a very limited growing space are damaging the retaining wall.The five Eucalyptus are made up of four(4) Silver pollar Eucalyptus, Eucalyptus cinerea, and one (1) Red Ironbark Eucalyptus, Eucalyptus sideroxylon. Safari Kid has complied with the removal of these trees if removal permit is approved. This report is concerning eleven (11) Red Ironbark Eucalyptus trees located at 10159 South Blaney, (also known as The Biltmore), one (1) Red Ironbark Eucalyptus and four(4) Silver pollar Eucalyptus trees on the neighboring property located at 20100 Stevens Creek Blvd, Cupertino, CA 95014 (Safari Kid Daycare).This makes up a total of sixteen (16)trees. Prometheus is seeking to obtain a tree removal permits these trees with the intention to replace them on a 2:1 ratio with a several species that are more suitable for the site. Assignment The assignment is to identify and remove the Eucalyptus trees located at 10159 South Blaney, and/or affecting the property.The assignment is also to provide reason for removal, and to provide a (and any removal and a replacement plan in conjunction with the city tree ordinance with the purpose to limiting obtain permit for removal. 1 factors) Factors are limited only to the trees in this report.This is a visual inspection from ground grade only. Observation Eleven (11)Trees located at 10159 South Blaney,The Biltmore: Removal Species Replacement Species Tree,C Phoro Clos�up Common Name Ba[anical �BH(In) Circumferenc Cammon Name Bo[anical Neme Size OTY Hame e[in) 1 � �� ,. ., Red Irnn6ark Eucalyptus 25 77 Magyar Ginkga Girtkgo 6iloha 2A"Box 2 ` � Eucalyp�us sidewxylon "Magmar" +�• r , -�ii �'..�. i �� r, r 5 � �_ I �.�., r i! 2 �u�y.-�� ` ~��>`C�� ,�' Redlr4n6ark Eusalyplus T8 57 English6ak Quercusraher 24`Box 2 S ' �f El1L3IV{iIJS sidernxylon -Fas[igiata" ' '� ;r f }.�q" ;r�^ y 'T.k 4., 8P �y �,. r.,� '._. . �.�7�.. i.�� .�s 'f�.�'�� 7 ;�,'� Red Ironhark Eucalyplus 25 79 Magyar Ginkga Ginkgo 6iloba 24"Box 2 -� ��i;� Eucalyp�as siderflxylon -Magmar" � ` —:�' � � � � . � - c.)' ....:. . -�. � 4 � - , Redlrun6ark Eucalyplus 34 i07 EuropeanBeech Fagussylvatica 24`Box 2 • ��' Eucalyplus sideroxylan .� �� .� � '1' �f � _� �_.. �- 5 �� Red Irnnbark Eucalyplus i7 53 English 6ak 4uercus ra6er 2A"Bax 2 ' a Eucalyplus sideroxylon -Fastigiata" , IA�� I I i �r� a .�, 4 r �;,,,.. f :�='�' :u B �`, A� Retl lronGark EucalypEus 28 88 Armstrang Retl Acer rubric 24"Bax 2 �. '��:s`'�• �� Eucalyp�us siderflxylfln Maple -Armstrang' �.. . ��-, .: . . f�,' . � . � � 7 �� ;� I �• 1' 1 ��7 �� 2 (Cont.) Removal Species Replacement Species Tree# Phoro Clos�up Common Name Ba[anlcai OBH�In] Circumferenc Common Name Bo[anlcal Name Size OTY Hame e�in] 7 t�� Reei tronhaik Eucalyplus 30 94 English Qak quercus robe� 24"6ox 2 ' '�`;fi� EucalypEus siderflxylun 'Fas�igiata" .��.�.7..�. I�y�.. I . ;,, t i :��' f . .- :�,�,;. � 8 �,��'� Red Iron6aik Eucalyplus i9 59 Armslrang Retl Rcer ru6ric 24"Bax 2 }+� ..0, tw• Eucalyplus siderflxylnn Maple 'Armstrong" 'S� w ��i��Y �':. � � 1'^ � 9 {"t Red IronGark Eucalyplus 24 75 Magyar Ginkgo Ginkgo 6iioha 24"Bax 2 •- ��i�5�;�,��'� Eucalypws sidewxylon -Magmar" v.r � �: a� I�.: �S�.S � I �_��.� 70 .�`� '' . _ � Red Iron6a�k Eucatyplus 20 59 Armstrang Red Acer ru6ric 24"Bax 2 '`:i•u-_� � .A 3 Eucalyp�us sitleroxylon Maple -Armstrong" , s�:, ,# �i , /"� �� . ' �. '�. . � ~ 1 \ k 1/4,', � �k � 1 -- � ,^r,�. 11 f ��?�-' Red Imn�ak Eucalyplus 30 94 European Beech Fagus sylvatica P4"Box 2 '( Eucalypt❑s sideroxylnn f �:� ��' ,,�;,� � �Izr� �- Il '��` � -,,' .v �� : 5 �� 3 Five (5)Trees located next door at 20100 Stevens Creek Blvd (Safari Kid): Removal Species Replacement Species Tree 0 Photo Clos�up Common Name Botanical OBH[In] Clrcumferenc Common Name Botanical Name Sixe OTY Name e(In� 72 -%� Silver pollar Eucalyp[us P3 72 Vine Maple Acer circinatum 24"Bax 2 � Eu�alypt�s cinerea � R,, � i,�n_ • _ _ — �' �. �r, ' 13 �fy � " Silver pollar Eucalyplus 22 89 Vine Maple Acer circinatum 24"Box 2 "''� �'� - Eucalyp�us cinerea >�.` �:. s�'�,, - _ ;"� r - ��•' .t . t d�• "� - r.��Y �, �' �.�. 14 I• � Silver pollar Eucalyptus 22 &9 Vine Maple Acer circinatum 24`BoK 2 ��i; Eucalypius cinerea i' � r gy . � ry�l . `� 75 "'-�-+ :�� SilverDul�r Eucalyplus 35 110 VineMaple Rcercircina[um 2A`Bax 2 Eucalyp!�a cinerea i i; ,^' t:F� n�" . ,ieY � - ,::�. ,s� � � .' -.. .: � ...�:":...:. ^* • `s' 16 ,• �q� Retl Ironbaik Eucalypws i9 BO Vine Maple Acer circinatum 24`Bax 2 �: Eucalyptus sideroxylfln ;,�' `=tir:�''�. `a....i �=��' I °� - - ;� =. .. � I � Testing and Analysis There were no soil, tree or other physical testings. Discussion All sixteen (16)trees listed in the tables above have multiple leaders and poor structure. Suckers have become large branches whose attachments are significantly weaker. Limb failures have occurred on several of these trees already. Future limb failures are probable. The Red Ironbark species particularly is a species of tree is not only an undesirable species to have in an urban forest community, but they are common to limb breakage and failures.The 11 Red Ironbarks located at Biltmore, and the 1 located at Kid Safari all have very poor structure, multiple leaders and weak attachments.The multiple leaders have V-shaped angles at the crotch with signs of included bark, which areas are also significantly weaker than if the co-dominants had a U-shaped crotch.The included bark at the crotch is a significant point of structural weakness and acts as a wedge and force the branch union to split apart.The target of these trees are high: in a populated community and adjacent to buildings, walkways and parking lots. 4 The four(4)Silver pollar Eucalyptus located at Kid Safari also have many of the same issues as the Red Ironbark: Multiple leaders, included bark,v-shaped crotches. Additionally,these had been planted in a narrow planter strip between a retaining wall and parking lot.These trees have outgrown their space and roots are lift and damaging surrounding infrastructure.The trunk and anchor roots on the tree are too close to both the wall and curb to be able to endure root cutting without significant structural risks. These trees are also lining a parking lot for the Kid Safari Day Care, which creates a high target area were a limb or tree to fail. Recommend The recommendation is that these sixteen (16)trees be removed from the landscape, and be replaced with thirty-two (32) 24" box trees in the same or nearby locations. ations Species recommendations for the site, need and space are listed in the table above. Locations of the removal and replacement locations are in the Attachments I below. Attachment I REMOVAL LOCATIONS: Map of removal and replacement � "�` """ i"� "y' �yi� Kid Safari Qay Gare locations. _ =�� . ... . �,.� �s .. � �s. ,.� � - � , 14. ., �L, $ F 13. 12. �" y � Entr�nr:❑ � � � � 2. s. �. s• �-� � . - � , . y � „ , . __ ._ �. �1 E'�hrance . , , � - : - ' � � � � . .. ... � .,. ,. - � � . . e - � Entrance ..:§ � 1. - '. : Y -�- ..,,. . '.� � � �� a _.., .rcr En[rance 5 REPLACEMENT SPECIES AND LOCATIONS: E�:�� 32 Replacement 5pecies (24"Box) �� -_ =�== -=°x x {6)Armstrong Red Maple ._ X "'� x ' {10) Vine Maples � � � m x (4} European Beech � x� � X _ {6) Magyar Gingko x -� � x {6) English Oak Xx x x X � p � .. ga .� 0 � �-- -� W - °, Entrance � ... . ' �� . �� . .. �, , c ' - _. F. y � � . . _ �� -_ �'� .• � , .� - fntrancc � ' � � ��. , ' . ,� � �- �� E r�-�.,r:�-�� Eni rance SpUiH gLAN[y AyE 6