TR-2022-023 - Revised Arborist Report_10500 N De AnzaCommunity Development Department
PftynMg D(iVDion — Cupertino
CUPERTINO APPROVED
Case # TR-2022-023
Application Number(s)
Approval BC rr4jlnOODIt �Eff �fFnr ent Department
Approval DWa00 lW4ilnue Cupertino, CA 95014
111 WOOD
ARCHITECTURE
❑-1-CON-TING-ANA-M-T
Signature Catherine Tarone
SUBJECT: ABj5gTe,REPORT FOR PROPERTY AT: DA03, De Anza 3, 10500 North De Anza Blvd.
Cupertino, CA 95014
This arborist report includes the observations and assessment of the White Alder (Alnus
Rhombifolia) tree located at northwest corner of building in lawn along fire lane. The site was
visited on Friday May 20, 2022, at 3 pm.
Assignment: Review one White Alder tree located at 10500 North De Anza Blvd Cupertino.
The assignment requires the following activities: visit the site, verify the tree, list the tree
species, diameter, crown radius, condition of the tree, impacts to the property, and mitigation
options.
Observations: The site was visited on Friday May 20, 2022, at 3 pm. The tree was not tagged
with numbers, though Treeplotter was used for identification and history. The tools used were
a diameter tape, screwdriver as a probe, hammer. Crown height and radius were estimated.
The tree listed on the map was measured for trunk diameter at approximately 4.5 feet above
grade with a diameter tape. The tree was assessed and rated for health and structure, and
overall condition considering branch structure, decay, leaf quality, vitality, dieback, lean, and
other issues that affect the condition of the tree.
The tree health condition rating was determined by observing the tree foliage, twig growth, leaf
density, and dead branches. The structure rating was determined by observing branch
attachment, crotch structure, trunk flare, surface roots, decay, insects and diseases, growth
habit, and any physical damages. The overall condition combines the health and the structure
ratings, based on the most significant conditions present.
The rating system used for both health, structure, and overall condition is:
(0) 0% dead;
(1) 1-20% very poor/severe decline;
(2) 21-40% poor/declining;
(3) 41-60% fair;
(4) 61-80% good; and
(5) 81-100% excellent.
Community Development Department
Planning DivMermaifix i�rncshows the data found during the site inspection.
CUPERTINO APPRQVFQ
Case #
Approva I B
Approva I
Signature
�TR-2022-023Trunk
t
Crown
Condi-
Comments
pplic o ber(s
-rmielg
#
meter
Feet
Radius
tion
ody: Director
/ Staff
Inches
Feet
ate
08/19/22
Cat
erineZT Qe
N 10
Tree has extensive brown cubicle rot
RMM0119
17.5
30'
E 3
1
at the base of the tree. Excavation
S 10
and resistograph reveal 60% decay.
W 15
Tree is leaning over the fire lane.
Removal is recommended.
Discussion: The property is DA03 or De Anza 3, 10500 North De Anza Blvd. Cupertino, CA
95014. The White Alder tree assessed is located at the northwest corner of building in the small
lawn area.
Conclusion: The White Alder tree is determined to be severely undermined with 60% basal
decay in cross section measured with a resistograph.
Mitigation: Plant a 36" box Silver Leaf Oak, Quercus hypoleucoides in the same location to
mitigate for the loss of the removed tree. Silver Leaf Oak is a good candidate for a replacement
tree due to enhanced suitability for current environmental conditions. It is a drought tolerant
tree and appropriate for a California landscape. The aforementioned tree is to replace a White
alder (Alnus rhombifolia) which in its natural setting is found along permanent streams and in
alluvial soils. White alder is a high water use tree and not appropriate for the u rban landscape
in California.
Please contact me at 415.792.9082 or email deva@iwoodarchitecture.com, if you have any
questions about this report.
Respectfully submitted,
Deva Braden
Certified Arborist WE7034A
Community Development Department
Planning Division — Cupertino
CUPERTINO APPROVED
Case # TR-2022-023
Application Number(s)
Approva I Bpid-yUr@itftU iu §trite Alder tree.
Approva I Date
Signature
Picture 2 showing decay pocket excavated at base of White Alder tree.
'CUPERTINC
Case #
Appro�
Appro-�,
SignatL
Community Development Department
Picture 3 showing Tree Removal Map for 10500 North De Anza Blvd. Cupertino.
Picture 3 showing Tree Replacement Map for 10500 North De Anza Blvd. Cupertino.
Community Development Department
Plannin Division —Cupertino
'CUPERTINO �?4TR-
IBM-- f
v
Case # _ "I'j'1'rftIiWk T9&ment Map for 10500 N. De Anza Blvd, Cupertino.
Approva I U.,
Signature
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2
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a,