HomeMy WebLinkAboutArborist Report
210 W Orange Grove Ave Arcadia, CA 91006
Prepared for:
Yun Wang co / “SLSD INC”
1414 Fair Oaks Ave Suite 3
South Pasadena, CA 91030
February 24, 2020
Revised May 16, 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
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 1
Table of contents
Summary ------------------------------------------------------------------ pg. 3
Background and assignment Summary ------------------------------- pg. 3
Existing Conditions & Google Earth Image ------------------------- pg. 4
List Inventory ------------------------------------------------------------ pg. 5 & 6
Site Plan With Trees ---------------------------------------------------- pg. 7
Tree Pictures ------------------------------------------------------------- pg. 8 thru 35
Oak Tree # 14 Details -------------------------------------------------- pg. 36 thru 39
Tree Protection Plan ---------------------------------------------------- pg. 40 thru 43
Arborist Signature Page ------------------------------------------------ pg. 44
Assumptions & Limiting Conditions Summary --------------------- pg. 45
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 2
Summary
Ms. Wang,
You have retained my consulting arborist services to provide a tree inventory and protection plan for the
property described as 210 W Orange Grove Ave Arcadia, CA 91006. You are in the planning and permitting
stage of a proposed new attached entertainment room on the northwest corner of the existing home where a Coast
live oak tree and its trunk sit directly on the footprint of the proposed entertainment room. Oak Tree # 14 is
proposed to be removed due to the location of its trunk directly on the footprint of the proposed new
entertainment room. There is to be no work south of the side yard gates, so no trees will be impacted in that
location. all work will occur north of the side yard gates but no work or excavations are proposed anywhere near
the drip line of any trees so there is expected to be no impact to any trees on the entire property.
Background and assignment
SLSD is a luxury home designing corporation that has been hired to design the proposed garage.
Ms. Wang has requested that I provide the following arboricultural services.
1) Inventory all significant trees on the property.
2) Evaluate the current health and possible impacts of the proposed construction on the protected
trees 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 tees
during and after construction activities are completed.
The following report is based on my analysis of the tree, site plan, and surrounding landscape on
September 19, 2019. For the purpose of this report I will address these trees as Tree # 1 thru 36.
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 3
Existing Site conditions
A two-story single-family home with an attached garage on the northeast corner currently exists on this property.
There are (35) trees on the subject property and (1) off-site Oak tree next to the east property line that will be
inventoried. Most of the trees are in good condition except for several Oak trees along the rear property line that
have strong leans, sparse canopies, cavities, or disease. The arborist will make recommendations for trees that are
visibly hazardous and should be removed. There are several Engelmann Oaks along the rear property line that are
understory trees to other large Coast live Oak trees and have acquired severe leans to the north. Because of the
deep shade the trunks are not growing commensurate with their leaning and dense canopies. These trees will
eventually fail due to the leverage of the unbalanced canopies, and underdeveloped trunks.
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 4
Tree # 14 Coast live oak
Dbh = 26 in.
To be removed
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.
List Inventory pg. 1
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
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.
List Inventory pg. 2
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 6
Site Plan With Trees
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 7
Tree # 1 (facing south)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 8
# 1 Saucer magnolia
Trees # 2 & 3 (facing southeast)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 9
# 2 Coast live oak
# 3 Coast live oak
Trees # 4 & 5 (facing east)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 10
# 4 Coast live oak # 5 Coast live oak
Tree # 6 (facing east)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 11
# 6 Coast live oak
OFF-SITE
Trees # 7 & 8 (facing east)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 12
# 8 Chinese banyan
# 7 Chinese banyan
Trees # 9 & 10 (facing southeast)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 13
# 10 Saucer magnolia
# 9 Saucer magnolia
Trees # 11 thru 13 (facing northwest)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 14
Tree # 14 (facing south)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 15
# 14 Coast live oak
Tree # 15 (facing west)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 16
# 15 Saucer magnolia
Tree # 16 (facing north)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 17
# 16 Fern Pine
Tree # 17 (facing east)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 18
# 17 Fern Pine
Tree # 18 (facing north)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 19
# 18 Fern Pine
Tree # 19 (facing south)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 20
# 19 Coast live oak
Tree # 20 (facing east)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 21
# 20 Avocado
Tree # 21 (facing east)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 22
# 21 Chinese banyan
Tree # 22 (facing west)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 23
# 22 Hong kong orchid
Trees # 23 & 24 (facing east)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 24
Tree # 25 (facing north)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 25
# 25 Coast live oak
Trees # 26 (facing north)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 26
# 26 Coast live oak
Trees # 27 & 28 (facing west)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 27
# 28 Coast live oak
# 27 Coast live oak
Tree # 28 (facing east)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 28
# 28 Coast live oak: missing bark and dying decayed
wood on the west and south side of the tree trunk
Tree # 28 (facing west)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 29
# 28 Coast live oak: the entire west side of the lower trunk
and roots of this Oak tree are dead and severely decayed.
The health and stability of this tree are severely
compromised, and it could fail at any time.
Tree # 28 (facing canopy)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 30
# 28 Coast live oak: canopy of this Oak tree is severely sparse
and only has approximately 5 percent of the normal canopy for
a tree of this size. There are no reasonable mitigation measures
to preserve this tree and it is an extremely hazardous tree that
when it fails it will break the power lines south of the tree
trunk. It is my opinion that this tree shall be removed as
soon as practically possible and the City of Arcadia has
been notified and approves the removal.
Tree # 29 (facing southeast)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 31
# 29 Coast live oak
Trees # 30 & 31 (facing southwest)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 32
# 31 Engelmann oak
# 30 Engelmann oak
Trees # 32 & 33 (facing south)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 33
# 33 Engelmann oak
# 32 oast live oak
Trees # 34 & 35 (facing south)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 34
# 34 Carolina cherry
# 35 Coast live oak
Tree # 36 (facing west)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 35
# 36 Coast live oak
South trunk with
dense canopy
North trunk with fairly
sparse canopy
Tree # 14 (facing south)
Coast live oak DBH = 26 in. ----- Height = 45 ft. ----- spread = 29 ft. --- Condition = good
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 36
Tree # 14
3 3
Unbalanced canopy
3 3
Tree # 1 (facing south) unbalanced canopy with approximately 90 percent of the
canopy west of the tree trunk
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 37
Tree # 14
Tree # 1 facing south)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 38
Tree # 14
Tree # 1 (facing east)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 39
Tree # 14
4 ft. x 6 ft. planter
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.
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 40
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.
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 41
Tree Protection Plan (full scale) Because Tree # 14 Coast live oak tree is proposed to be removed and there will
be no work within the drip line of any other trees, this project is expected to have zero impact on all of the
protected and unprotected trees if the fencing plan is followed and adhered to.
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 42
Tree Protection Plan (cropped)
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
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Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
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Certificate of Performance & Arborists Disclosure Statement
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 Arborist assumes no responsibility for damage to trees as a result of the
construction activities as the Arborist cannot always be present to witness all construction tasks near
the subject trees.
• 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 of 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, d isputes
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.
Yun Wang “c/o SLSD Inc. 210 W Orange Grove Ave Arcadia, CA 91006 February 25, 2020
Javier Cabral / Consulting Arborist Pg. # 45