HomeMy WebLinkAboutArborist Report
111 W Las Flores Ave Arcadia, CA 91007
Prepared for:
Mr. Kenny Yu
111 W Las Flores Ave
Arcadia, CA 91007
September 28, 2021
Prepared by:
Javier Cabral Consulting Arborist
International Society of Arborists # WE- 8116A
1390 El Sereno Ave
Pasadena, California 91103
(626)818-8704
jctcabral@sbcglobal.net
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 1
Table of contents
Summary ------------------------------------------------------------------ pg. 3
Background and assignment Summary ------------------------------- pg. 3
Site Plan With Trees------------------------------------------------------ pg. 4 & 5
List Inventory-------------------------------------------------------------- pg. 6
Tree Pictures -------------------------------------------------------------- pg. 7 thru 9
Protection Guidelines ---------------------------------------------------- pg. 10 thru 15
Certificate of performance ---------------------------------------------- pg. 16
Arborist Signature Page ------------------------------------------------- Pg. 17
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
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, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 3
Site Plan With Trees (full scale)
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 4
Site Plan With Trees (Cropped)
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 5
A) - Healthy, vigorous tree, reasonably free of disease, with good structure and form typical of the species.
B) - A tree with slight decline in vigor, small amount of twig dieback, minor structural defects that could be
corrected.
C) - A tree with moderate vigor, moderate twig and small branch dieback, thinning crown, poor leaf color,
moderate structural defects that might be mitigated.
D) – A tree in decline, epicormics growth, extensive dieback of medium to large branches, significant structural
defects that cannot be abated.
F) – A tree in severe decline, dieback of scaffold branches and or trunk, mostly epicormics growth, extensive
structural defects that cannot be abated.
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 6
Trees # 1 & 2 (facing north)
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 7
# 1 Southern magnolia # 2 Chinese elm
Oak Tree # 3 (facing northeast)
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 8
# 3 Coast live oak
(DBH 26 in.) estimated
Oak Tree # 3 (facing northeast)
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 9
Trunk is approximately 16 ft
from property line fence
Off-site Oak tree # 3
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 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 10
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 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 11
Site Plan With Protection Fencing (cropped)
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 12
Tree # 1 Southern magnolia Protection Details
a) Structural excavation and over-excavation: The encroachment into the drip line from the new home is
expected to be approximately 10 percent of the total drip line. The impact is expected to be zero to
minimal.
b) Driveway: The proposed new driveway will have no impact on this Magnolia tree because it is not
within the drip line.
c) Concrete Walkways: The main entry walkway and the front yard walkway shall be manually excavated
and to a minimal depth to minimize root disturbance and damage.
d) New Landscaping: If the lawn is replaced the removal of existing lawn and soil preparation within 15 ft.
of the tree trunk shall be done manually with handheld tools only.
e) New Sprinklers: The existing sprinklers should be used if possible. No broadcast excavations for pipes
shall be done within 15 ft. of the trunk of this tree.
f) Canopy pruning: No pruning of this tree will be required to complete the proposed construction project.
g) Root pruning: Roots encountered for the excavation of the new house footings, entry walkway and
front yard walkways shall be cleanly severed in a vertical position with sharp tools.
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.
i) 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 long term
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 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 13
Tree # 2 Chinese elm Protection Details
a) Structural excavation and over-excavation: The encroachment into the drip line from the new home is
expected to be approximately 15 percent of the total drip line. The impact is expected to be zero to
minimal.
b) Driveway: The proposed new driveway will have minimal impact on this Magnolia tree because it is
located on the footprint of the existing driveway.
c) Concrete Walkways: The main entry walkway and the front yard walkway shall be manually excavated
and to a minimal depth to minimize root disturbance and damage.
d) New Landscaping: If the lawn is replaced the removal of existing lawn and soil preparation within 15 ft.
of the tree trunk shall be done manually with handheld tools only.
e) New Sprinklers: The existing sprinklers should be used if possible. No broadcast excavations for pipes
shall be done within 12 ft. of the trunk of this tree.
f) Canopy pruning: Some lifting of the canopy will be necessary for structural clearance on the north side
of this tree. All trimming shall conform to International Society Of Arborists ANSI A300 Pruning
Standards.
g) Root pruning: Roots encountered for the excavation of the new house footings, entry walkway and
front yard walkways shall be cleanly severed in a vertical position with sharp tools.
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.
i) 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 long-term
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 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 14
Tree # 3 Coast live oak Protection Details
a) Structural excavation and over-excavation: The encroachment into the drip line from the new home is
expected to be approximately zero percent of the total drip line. The impact is expected to be zero to
minimal.
b) CMU Wall: The proposed new Concrete masonry unit is east of this tree is 15 ft. from the edge of the
tree trunk. At this distance, the impact to the Oak tree with a standard 18 in. wide x 24 in. deep footing
is expected to be minimal. The excavation for the footing within 18 ft. of the tree trunk shall be done
manually. And all roots cleanly severed with a vertical cut.
c) Driveway: The proposed new driveway is expected to have zero impact on this Oak tree because it does
not encroach into the drip line of this tree.
d) Concrete Walkways: The new concrete walkway is expected to have zero to minimal because they are
not within the drip line of this tree.
e) New Landscaping: The proposed new landscaping near the property line fence is not expected to
impact the Oak tree because the tree trunk is 15 ft. from the property line and all roots east of the cmu
wall will have been severed already .
f) New Sprinklers: This is an off-site tree and sprinklers will not affect it.
g) Canopy pruning: No pruning of this tree will be required to complete the proposed construction project.
h) Root pruning: The excavation for the cmu footing along the property line shall be done manually. And
all roots cleanly severed with a vertical cut. All roots east of the property line cmu wall can be severed
or removed as they will already have been detached from the tree from the cmu wall footing
i) Protection Fencing: A 30 ft. section of the existing chain link fence adjacent the tree shall not be
removed and left in place until the cmu wall is ready to be built. If the cmu wall will be constructed
before any other construction activities including grading the existing fence can be removed entirely.
No large mechanical equipment shall be allowed west of the property line at any time .
j) Maintenance: During the hot summer months the tree shall be watered as needed until the sprinkler
system is installed and working.
k) Encroachment impacts: This project is expected to have zero to minimal impact on the short- or long-
term 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 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 15
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 o r 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 doc umentation
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 prope rty 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 condi tion 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 t rees is to eliminate all trees.
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 16
Kenny Yu, 111 W Las Flores Ave Arcadia, CA 91007 September 28, 2021
Javier Cabral / Consulting Arborist Pg. # 17