HomeMy WebLinkAboutArborist Report
2558 Doolittle Ave Arcadia, CA 91006
Prepared for:
Lap Nguyen
2558 Doolittle Ave
Arcadia, CA 91006
March 20, 2019
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
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
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
Site Survey With Trees-------------------------------------------------- pg. 6 thru 7
Tree Pictures ------------------------------------------------------------- pg. 8 thru 11
Protection Guidelines --------------------------------------------------- pg. 12 thru 17
Certificate of performance --------------------------------------------- pg. 18
Arborist Signature Page ------------------------------------------------ Pg. 19
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 2
Summary
Mr. Nguyen,
You have retained my consulting arborist services to provide a tree inventory and protection plan for the
property described as 2558 Doolittle 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 no 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. Nguyen 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. Nguyen.
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 protected
trees that will remain during and after construction activities are completed.
The following report is based on my site visit on March 20, 2019 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 7.
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 3
Site conditions
A one story single family home currently exists on this property located 2558 Doolittle Ave Arcadia, CA 91006
.
1) There are 6 total trees on the project property including one City Tree and one Magnolia tree in the front
yard setback that are protected by the City of Arcadia Tree Ordinance.
2) There are no trees proposed to be removed for this project.
Google Earth Image
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 4
List Inventory pg. 1
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 5
Site Survey With Trees (full scale)
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 6
Survey With Trees (cropped)
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 7
Trees # 1 & 2 (facing east)
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 8
# 1 Saucer magnolia
# 2 Southern magnolia
Trees # 3 thru 5 (facing east)
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 9
Tree # 6 (facing west)
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 10
# 6 Carrotwood
Tree # 6 (facing west)
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 11
# 7 off-site Olive
General Tree Protection Plan
1) Avoid damaging the roots, stem, and branches with mechanical and manual equipment.
2) Avoid soil compaction by prohibiting the use of heavy equipment such as backhoes and bobcats under the
tree drip line.
3) Do not store or park tools, equipment, vehicles, or chemicals under the tree drip line.
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.
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.
7) Do not raise or lower the grade within the tree protection zone of any protected trees unless approved by
the project arborist.
8) Place a protective barrier or temporary fencing around as much of the drip line of the tree trunk as
possible while allowing for the proposed work to be done. Protection fencing shall be 4 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, and loaders 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) 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.
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 12
Site Plan With Protection Fencing
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 13
Site Plan With Protection Fencing
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 14
Tree # 1 Saucer magnolia Protection Details
a) Structural excavation and over-excavation: Structural Excavation: This tree will not be impacted by
any structural excavations.
b) Driveway: This tree will not be impacted by the driveway.
c) New Landscaping: Roots shall not be severed for plantings within 6 ft. of the trunk of the tree on all
sides.
d) New Sprinklers: any trenches for sprinklers shall be above ground drip or tunneled under roots within 6
ft. of the trunk of this tree on all sides of the trunk.
d) Canopy pruning: No pruning will be required to complete the proposed construction project.
e) Root pruning: Any roots encountered for the irrigation system for the lawn beyond 6 ft. of the trunk of
this tree may be cleanly severed with a sharp tool.
f) 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.
g) Maintenance: During the hot summer months the tree shall be watered as needed until the sprinkler
system is installed and working.
h) Encroachment impacts: This project is expected to have a minimal to zero 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.
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 15
Tree # 2 Southern magnolia Protection Details
a) Structural excavation and over-excavation: Structural Excavation: The proposed excavation for the
house foundation closest this tree trunk is 6 ft. 9 in. from the edge of the tree trunk and almost exactly
along the footprint of the existing house. Since the proposed new footings are in the location of the
existing footings root disturbance should be minimal. I t is extremely important that the demolition of
the existing foundation adjacent the Magnolia tree be done in a very careful way by gently prying the
concrete away from the tree trunk and to not damage or pull roots out of the ground. A 8 ft. grade
beam shall be used from the southwest corner of the proposed garage north. This will significantly
reduce the impact to this Magnolia tree.
b) Driveway: This tree will not be impacted by the driveway.
c) New Landscaping: Roots shall not be severed for plantings within 6 ft. of the trunk of the tree on all
sides.
d) New Sprinklers: any trenches for sprinklers shall be above ground drip or tunneled under roots within 6
ft. of the trunk of this tree on all sides of the trunk.
e) Canopy pruning: some minor canopy raising may be will be required to complete the proposed
construction project. Pruning shall conform to International Society of Arboricultural standards.
f) Root pruning: Any roots encountered for the irrigation system for the lawn beyond 6 ft. of the trunk of
this tree may be cleanly severed with a sharp tool.
g) 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.
h) Maintenance: During the hot summer months the tree shall be watered as needed until the sprinkler
system is installed and working.
i) Encroachment impacts: This project is expected to have a minimal to moderate 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.
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 16
Tree # 7 Olive Protection Details
a) Structural excavation and over-excavation: Structural Excavation: This tree will not be affected by any
structural excavations
b) Driveway: This tree is approximately 14 ft. from the edge of the existing driveway and the proposed
driveway is very close to the footprint of the existing driveway. The proposed new driveway is expected
to have minimal impact to this tree because root disturbance is expected to be minimal.
c) New Landscaping: Soil tilling between the proposed new driveway and the north property line shall be
done manually within 12 ft. of the tree trunk.
d) New Sprinklers: any trenches for sprinklers shall be above ground drip or tunneled under roots within
10 ft. of the trunk of this tree on all sides of the trunk.
e) Canopy pruning: No trimming will be required for this off-site tree..
f) Root pruning: Any roots encountered for the proposed driveway can be cleanly severed with a sharp
tool at the north edge of the driveway.
g) Protection Fencing: This off-site tree will not require protection fencing as the property line is bordered
by a hedge planted by The Owner of the Olive tree.
h) Maintenance: During the hot summer months the tree shall be watered as needed until the sprinkler
system is installed and working.
i) Encroachment impacts: This project is expected to have a 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.
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 17
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 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 a nd 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 wit hin 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.
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 18
Lap Nguyen 2558 Doolittle Ave Pasadena, CA 91006 March 20, 2019
Javier Cabral / Consulting Arborist Pg. # 19