HomeMy WebLinkAboutArborist Report
1519 10th Ave Arcadia, CA 91006
Prepared for:
Brian Chen c/o C & H Design Group, INC
32 Magna Vista Ave
Arcadia, CA 91007
Original Report March 22, 2020 / Revised May 2, 2020
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
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 1
Table of contents
Summary ----------------------------------------------------------------- pg. 3
Background and assignment Summary ------------------------------ pg. 3
Google Earth Image & Site conditions ------------------------------- pg. 4
List Inventory ------------------------------------------------------------ pg. 5
Survey With Trees-------------------------------------------------------- pg. 6
Tree Pictures ------------------------------------------------------------- pg. 7 thru 19
Protection Guidelines --------------------------------------------------- pg. 20 thru 24
Arborist Signature Page ------------------------------------------------ Pg. 25
Certificate of performance --------------------------------------------- pg. 26
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 2
Summary
Mr. Chen,
You have retained my consulting arborist services to provide a tree inventory and protection plan for the
property described as 1519 10th Ave Arcadia, CA 91006. You are in the planning process of demolishing the
existing single family home and redeveloping the property with a new single family home.
The proposed demolition and construction is expected to have minimal to moderate impact to the protected trees
that will remain due to the distance of excavations, trenches, and footings to the tree trunks. 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. Chen “H C Design Group INC. is a luxury home design build firm that has requested that I provide
the following arboricultural services.
1) Identify all trees on the property and label them on the architectural drawings as provided to the
arborist by Mr. Brian Chen.
2) Evaluate the current health of the trees 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 trees that
will remain during and after construction activities are completed.
The following report is based on my site visit on March 20, 2020 and my analysis of the trees, site plan,
and surrounding landscape. For the purpose of this report I will address these trees as Trees # 1 thru 17.
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 3
Site conditions
A one-story single-family home currently exists on this corner property located at 1519 10th Ave Arcadia, CA
91006.
1) There are total of (17) trees on the subject property of which (3) are protected city owned trees and (1) is
on the private property
2) (3) protected trees are proposed to be removed for this construction development. (1) city owned Crape
myrtle is located on the footprint of the proposed driveway, (1) Evergreen ash that is severely infected
with Bacteria fireblight, and (1) Carrotwood tree because it is in poor condition.
Google Earth Image
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 4
Tree Condition Rating Guidelines
List Inventory pg. 1
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 5
Good = good to excellent woody structures and foliage, exhibits to no signs of stress such as deadwood, disease,
structural defects, and root and anchorage defects.
Fair = can exhibit a minor degree of one or more of the above mentioned symptoms that can be reasonably corrected
by simple maintenance or treatments.
Poor = can exhibit a major degree of one or more of the above mentioned symptoms that may or may not be
reasonably corrected by simple maintenance or treatments.
Dead/Dying = can exhibit a major degree of one or more of the above mentioned symptoms that cannot be corrected
by simple maintenance or treatments.
Survey With Trees
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 6
Trees # 1 & 2 (facing north)
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 7
# 2 Evergreen pear
(DBH = 14 in.)
# 1 Southern magnolia
(DBH = 11 in.)
Tree # 2 Evergreen pear (TO BE REMOVED)
This Evergreen pear is infected with Bacterial fireblight. Bacterial fireblight has no known chemical cure and is
very contagious to other susceptible trees. This pathogen Erwinia amylovora can kill a tree under the right
circumstances and is very difficult to eradicate. It is recognized by dead and wilted leaves and shoot ends. The
shoot ends take on the appearance of a Sheppard’s crook and die to a black color and branches discharge a black
ooze. Because this disease is very common in this species in Southern California and because this tree is already
infected, I recommend removal of this tree.
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 8
Twigs infected
and blackened
Twigs infected
and blackened
Twigs infected
and blackened
Twigs infected
and blackened
Trees # 3 & 4 (facing north)
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 9
# 4 Guava
(DBH = 2+2+2+2+2 in.)
# 3 Apple (DBH =
1+2+2+2+3+3+3+4+4+5+6 in.)
Tree # 5 & 6 (facing southwest) TO BE REMOVED
These two trees have been severely topped in the past and are in very poor shape and health. The branches have
significant decay. And there is significant dieback in the canopy. The branch structure is also poor.
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 10
# 5 Carrotwood
(DBH = 13 in.)
# 6 Carrotwood
(DBH = 11 in.)
Not protected
Tree # 5 (facing east)
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 11
# 5 Carrotwood Large dead
scaffold branches
# 5 Carrotwood Large
dead scaffold branches
Tree # 5 (facing east)
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 12
# 5 Carrotwood: dead bark and wood on the
west side of the trunk. And root flare
Tree # 5 (facing east)
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 13
# 5 Carrotwood: Major scaffold branches are
dead to the main trunk or severely topped and
decaying.
Tree # 5 (facing east)
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 14
# 5 Carrotwood: Another major scaffold branch
that is decaying.
Trees # 7 & 8 (facing west)
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 15
# 7 Crape myrtle
(DBH = 4 in.)
# 8 Lemon
(DBH = 4+5+5+5
in.)
Tree # 9 (facing north) Crape myrtle (TO BE REMOVED)
This Crape myrtle tree is located on the footprint of the proposed driveway and cannot be preserved,
Mitigation: (1) Magnolia soulangeana tree in a 36-inch box is proposed to replace this tree.
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 16
# 9 Crape myrtle
(DBH = 8 in.)
Trees # 10 & 11 (facing southwest)
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 17
# 10 Lime
(DBH = (11x2) & (10x3) in.)
# 11 Orange
(DBH = 7 in.)
Trees # 12 thru 14 (facing west)
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 18
# 12 American sweetgum
(DBH = 2+5 in.)
# 13 American sweetgum
(DBH = 6 in.)
# 14 American sweetgum
(DBH = 5+6 in.)
Trees # 15 & 16 (facing north)
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 19
# 15 Mandarin
(DBH = 2+2+3+3+4+4 in.)
# 16 Apple
(DBH 2+2+3+3+3+3+5+5 in.
2+2+3+3+3+3+5+5 in.)
General Tree Protection Guidelines
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. 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.
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 20
8) Place a protective barrier or temporary fencing as directed by the consulting arborist in the diagram below.
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.
11) All protected trees shall be watered before, during, and after construction as needed to prevent drought
stress and tree death until sprinklers have been installed and are functional.
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 21
Site Plan With Protection Fencing
B Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 22
Tree # 1 Southern magnolia
a) Structural excavation and over-excavation: This tree will be will not be impacted by any structural
excavations due to the significant distance of the tree to the nearest proposed house foundation.
b) Walkway: The proposed new main entry concrete walkway if located approximately 13 ft. from the
tree trunk and almost directly on the footprint of the existing driveway. At this distance the impact to
the tree is expected to be zero.
c) Driveway: This proposed new driveway is on the opposite side of the property and this tree will not be
impacted by it
d) New Landscaping: The soil tilling for the proposed new ground cover and removal of the existing lawn
within 10 ft. from the tree trunk shall be done manually with manual tools only.
e) New Sprinklers: No broadcast trenching shall be done within 10 ft. of this tree.
f) Canopy pruning: No pruning of this tree will be required to complete the proposed construction
project.
g) Root pruning: Roots beyond 10 ft. of the tree trunk can be cleanly severed with a sharp tool.
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 this tree shall be watered as needed until the sprinkler
system is installed and working.
j) Encroachment impacts: This project is expected to have zero to minimal impact on the short- or long-
term health of this tree and they are expected to survive in good health if the protection
recommendations are followed and adhered to.
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 23
Tree # 7 Crape myrtle Protection Details
a) Structural excavation and over-excavation: Structural Excavation: This tree will be will not be
impacted by any structural excavations due to the significant distance of the tree to the nearest
proposed house foundation.
b) Driveway This proposed new driveway is located very far from this tree and impact is expected to be
zero.
c) New Landscaping: The soil tilling for the proposed new ground cover and removal of the existing lawn
within 5 ft. from the tree trunk shall be done manually with manual tools only. No ground cover plants
shall be planted within 1 ft. of the tree trunk.
d) New Sprinklers: No broadcast trenching shall be done within 5 ft. of these trees. Above ground
sprinkler systems and drip irrigation are good alternatives to prevent root loss
e) Canopy pruning: No pruning will be required to complete the proposed construction project.
f) Root pruning: Roots beyond 5 ft. of the tree trunk can be cleanly severed with a sharp tool.
g) Protection Fencing: shall consist of 6 ft. high chain-link free-standing panels or posts hammered into
the ground 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.
h) Maintenance: During the hot summer months the tree drip line on the side of the subject property
shall be watered as needed until the sprinkler system is installed and working on the .
i) Encroachment impacts: This project is expected to have minimal impact on the short or long term
health of this tree and it is expected to survive in good health if the protection recommendations are
followed and adhered to.
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 24
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 25
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 p reservation 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 e ducation, 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, a nd
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.
Brian Chen 1519 10th Ave Arcadia, CA 91006 May 2, 2020
Javier Cabral / Consulting Arborist Pg. # 26