HomeMy WebLinkAboutArborist Report111 W Las Flores Ave Arcadia, CA 91007
Prepared for:
Mr. Kenny Yu
111 W Las Flores Ave
Arcadia, CA 91007
April 11, 2019
Prepared by:
Javier Cabral Consulting Arborist
International Society of Arborists # WE- 8116A
1390 El Sereno Ave
Pasadena, California 91103
(626)818-8704
ictcabral&sbcglobal.net
International
Society
of Arboriculture
ISA Certified Arborist
Javier Cabral
Certificate Number WE -6116A
E)pIreaon Date. Dec 31, 2019
Kenny Yu, 11 I W Las Flores Ave Arcadia, CA 91007 April H, 2019
Javier Cabral / Consulting Arborist Pg. # I
Table of contents
Summary----------------------------------------------------- pg. 3
Background and assignment Summary ------------------------------- pg. 3
Site Survey With Trees--------------------------------------------------- pg. 4
Tree Pictures-------------------------------------------------------------- pg. 5 thru 6
Protection Guidelines---------------------------------------------------- pg. 7 thru 11
Certificate of performance ---------------------------------------------- pg. 12
Arborist Signature Page ------------------------------------------------- Pg. 13
Kenny Yu, i 11 W Las Flores Ave Arcadia, CA 91007 April 11 2019
Javier Cabral / Consulting Arborist Pg. # 2
Summary
Mr. Yu,
You have retained my consulting arborist services to provide a tree protection plan for one Coast live
oak "Quercus agrifolia" tree located on the east neighbor's property 15 ft. east of the east property line
of 111 W Las Flores Ave Arcadia, CA 91007. You are in the planning process of demolishing the existing
single family home and redeveloping the property with a new two story single family home.
The proposed demolition and construction is expected to have minimal impact to the protected off-site Oak tree
that will remain due to the distance of excavations, trenches, and footings to the tree trunk. A complete tree
protection plan will be included to protect above and below ground tree parts from physical damage, soil
compaction, and chemical damage.
Background and assignment
Mr. Yu has requested that I provide the following arboricultural services.
1) Identify one Oak tree and label it on the architectural drawings as provided to the arborist by Mr.
Yu.
2) Evaluate the current health of the tree and possible impacts of the proposed construction based
on the provided site plan and make recommendations.
3) Provide a tree protection plan that will help ensure the short and long term health of the off-site
Oak tree that will remain during and after construction activities are completed.
The following report is based on my site visit on March 30, 2019 and my analysis of the tree, site plan,
and surrounding landscape. For the purpose of this report I will address this tree as Tree # 1.
Kenny Yu. 1 I 1 W Las Flores Ave Arcadia, CA 91007 April 11, 2019
Javier Cabral / Consulting Arborist Pg. # 3
Survey With Oak Tree
Y
I
Off-site Coast live
oak DBH = 26 in.
i
i
I
I
I
Kenny Yu. 11 I W Las Flores Ave Arcadia, CA 91007 Aoril 11 2019
Javier Cabral / Consulting Arborist Pg. # 4
m
Oak Tree # 1 (facing northeast) --- DBH = 26 in. --- height = 60 ft. --- spread = 40 ft.
Condition = good
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 April It, 2019
Javier Cabral / Consulting Arborist Pg. # 5
l
General Tree Protection Plan
1) Avoid damaging the roots, stem, and branches with mechanical and manual equipment. No roots shall
be severed within the Tree Protection Zone "TPZ" which is the same as the area within the Tree
Protection Fencing "TPF." Roots greater than two inches in diameter outside of the TPZ shall be cleanly
severed with a sharp tool such as a hand saw or manual pruners..
2) Avoid soil compaction by prohibiting the use of heavy equipment such as backhoes and bobcats under
the tree drip line. If access within the TPZ is required during the construction process, the route shall be
covered in a 6 inch layer of mulch in the TPZ and the area shall be aerated and fertilized at the conclusion
of construction.
3) Do not store or park tools, equipment, vehicles, or chemicals under the tree drip line. No equipment or
debris of any kind shall be placed within the TPZ. No fuel, paint, solvent oil, thinner, asphalt, cement,
grout, or any other construction chemical shall be stored or allowed in any manner to enter within the
TPZ.
4) Avoid washing of equipment and tools such as wheel barrels, shovels, and mechanical motors under the
tree drip line.
5) Prevent flooding and pooling of service water under the drip line. Grade changes that will flood the TPZ
are prohibited unless a drainage plan is implemented. No grade changes within the TPZ shall be allowed.
6) Avoid cutting tree roots whenever possible. This can sometimes be accomplished by bridging roots,
tunneling, or radial trenching. If roots must be cut use a sharp tool that will make a clean flush cut and not
tear the roots. If possible all digging under the tree drip line should be done manually to avoid tearing out
of roots. Roots outside of the TPZ may be cleanly severed vertically with a sharp garden tool.
7) Do not raise or lower the grade within the tree protection zone of any protected trees unless approved
by the project arborist. Roots greater than 1 inch in diameter that are exposed or damaged shall be cut
with a sharp tool such as a hand saw, pruners, or loppers and covered with soil in conformance to industry
standards as soon as possible. If any work is required within the TPZ the Arborist shall be consulted
previous to beginning. The Arborist shall be contacted as soon as possible to arrange for a timely
inspection and prevent delays.
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 April 11.2019
Javier Cabral / Consulting Arborist Pg. # 7
8) Protection fencing shall be 5 to 6 ft. high chain link freestanding panels or secured to posts driven into the
ground. There shall be no entry gates into the protected zones. The protection fencing shall be in place
before demolition begins and shall only be removed or reduced when all heavy equipment such as
back -hoes, bobcats, loaders, and other heavy equipment with tires and tracks will not be required.
Fencing can be adjusted or sections reduced or removed as the project advances into the landscaping
phases of the project. The consulting arborist shall be contacted if there are doubts about the placement or
removal of fencing.
9) Landscape preparation & excavation within the TPZ shall be limited to the use of hand tools and
small hand-held power tools and shall not be of a depth that could cause root damage. No attachments or
wires other than those of a protective or non -damaging method shall be attached to a protected tree.
10) Construction personnel should be briefed on the importance of the guidelines before construction
begins and reminded of it during tailgate meetings and as necessary. A printed copy should be posted
where employees can be reminded of it.
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 April 11 2019
Javier Cabral / Consulting Arborist Pg. # 8
oue rian vv an rrotecuun
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of the property line to allow for the
rvation and construction of the
losed concrete block wall. The
action fencing shall be in place before
construction begins including
olition and can be removed when the
I wall is complete.
AI
Off-site Coast live oak
DBH = 26 in. estimated
Kenny Yu, I I I W Las Flores Ave Arcadia, CA 91007 April 1 12019
Javier Cabral / Consulting Arborist Pg. # 9
�1
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Off-site Coast live oak
DBH = 26 in. estimated
Kenny Yu, I I I W Las Flores Ave Arcadia, CA 91007 April 1 12019
Javier Cabral / Consulting Arborist Pg. # 9
Site Plan With Protection Fencing (crop
«...UII�Uea j
.rete block wall to be manually -
vated with manual tools or hand
power digging tools only. Roots _
ter than two inches shall be
ily cut with a sharp saw or plant
ners 8 l000ers.
= 26 in. estimated
Kennv Yu I I I W Las Flores Ave Arcadia CA 91007 April I 12019
Javier Cabral / Consulting Arborist P�-. # 10
Tree # 1 Coast Live Oak Protection Details
a) Structural excavation and over -excavation: This tree will not be impacted by any structural excavations
because there are none proposed within the tree drip line.
b) Driveway: The proposed new driveway will have no impact on this Oak tree because roots within the
driveway footprint will have been severed for the excavation of the concrete block wall.
c) Concrete block Wall: The footing for the concrete block wall is proposed at approximately 14 ft. from
the west edge of the tree trunk, this is approximately 6.4 times the diameter of the tree trunk. At this
distance and if the protection plan is adhered to the impact to the Oak tree is expected to be minimal.
d) New Landscaping: The tree will not be affected by the proposed new landscaping and lawn because
they are outside the drip line.
e) New Sprinklers: No sprinklers will impact this Oak tree.
f) Canopy pruning: No pruning of this tree will be required to complete the proposed construction project.
g) Root pruning: Roots greater than 2 inches uncovered by the 35 ft. section of manual excavation shall be
cleanly severed with a sharp tool such as a hand saw, pruners, or loppers.
h) Protection Fencing: shall consist of 6 ft. high chain link free standing panels and shall be in place before
any works begins including demolition. All protection fencing may be removed or reduced when all
heavy equipment and major construction is completed and landscaping is ready to be installed.
Q Maintenance: During the hot summer months the tree shall be watered as needed until the sprinkler
system is installed and working.
j) Encroachment impacts: This project is expected to have a minimal impact on the short or longterm
health of this tree and it expected to survive in good health if the protection recommendations are
followed and adhered to.
Kenny Yu 111 W Las Flores Ave Arcadia CA 91007 Aoril 11 2019
Javier Cabral / Consulting Arborist Pg. # 11
Certificate of Performance & Limiting Conditions
I Javier Cabral certify the following:
• No warranty is made, expressed or implied, that problems or deficiencies of the trees or the property will not
occur in the future, from any cause. The Arborist shall not be responsible for damages or injuries caused by any
tree defects, and assume no responsibility for the correction of defects or tree related problems.
• The owner and client of the trees may choose to accept or disregard the recommendations of the Arborist or
seek additional advice if the owner decides not to accept the Arborists findings or recommendations.
• The Arborist has no past, present or future interest in the removal or preservation of any tree. The opinions
contained in the Arborist report are independent and objective judgements of the Arborist.
• The findings, opinions, and recommendations of the Arborist are based on based on the physical inspection of
said property. The opinions are based on knowledge, experience, and education.
• The Arborist shall not be required to provide testimony, provide site monitoring, provide further documentation
for changes beyond the control of the Arborist, be deposed, or to attend any meeting without contractual
arrangements for additional fees to the Arborist.
• The Arborist assumes no responsibility for verification of ownership or location of property lines, or for any
recommendations based on inaccurate information.
• This Arborist report may not be reproduced without the expressed written permission or the Arborist and the
client to whom the report was provided to. Any changes or alteration of this report invalidates the entire report.
• 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, make recommendations to prevent or minimize
damage to trees during and after construction projects, and attempt to reduce the 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 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
specified period of time. Likewise, remedial treatments, like any medicine, cannot be guaranteed.
• Treatment, pruning and 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 other issues.
Arborists cannot take such considerations into account unless complete and accurate information is disclosed to
the arborist. An arborist should then be expected to reasonably rely upon the completeness and accuracy of the
information provided.
• 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.
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 April H, 2019
Javier Cabral / Consulting Arborist Pg. # 12
Thank you and feel free to contact me if you have any questions or concerns.
Yours truly,
Javier Cabral / Consulting arborist
1390 EI Sereno Ave Pasadena, Ca 91 103
International Society of Arboriculture # WE 8116A
Kenny Yu, I I I W Las Flores Ave Arcadia, CA 91007 AoriI 11 2019
Javier Cabral / Consulting Arborist Pg. # 13