HomeMy WebLinkAboutArborist Report
1605 Hyland Ave Arcadia, CA 91007
Prepared for:
Phillip Chan “PDS Studio Architect LLC”
711 S. First Ave
Arcadia, CA 91006
June 21, 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
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 1
Table of contents
Summary ----------------------------------------------------------------- pg. 3
Background and assignment Summary ------------------------------ pg. 3
Google Earth Image ----------------------------------------------------- pg. 4
List Inventory ------------------------------------------------------------ pg. 5
Site Plan With Trees ----------------------------------------------------- pg. 6 & 7
Tree Pictures ------------------------------------------------------------- pg. 8 thru 12
Protection Guidelines --------------------------------------------------- pg. 13 thru 20
Arborist Signature Page ------------------------------------------------ Pg. 21
Assumptions & Limiting Conditions Summary --------------------- pg. 22
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 2
Summary
Mr. Chan,
You have retained my consulting arborist services to provide a tree inventory and protection plan for the
property described as 1605 Hyland Ave Arcadia, CA 91007. You are in the 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 all the protected
trees that will remain due to the substantial 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
PDS Studio Architect is a luxury home designing corporation that has been hired to design the proposed
home and separate structures.
Mr. Chan has requested that I provide the following arboricultural services.
1) Identify all trees on the property and label them on the site plan.
2) Evaluate the current health 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
tees that will remain during and after construction activities are completed.
The following report is based on 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 12.
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 3
Existing Conditions:
There is currently an existing single family home that is proposed to be demolished. There are (7) protected Oak
trees in the front yard and (4) protected Oak trees in the back yard and (1) unprotected Ash tree in the back yard.
There are no trees proposed to be removed and all trees will be protected by the protection plan contained in this
report.
Google Earth Image
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 4
List Inventory
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 5
Site Plan With Trees (full scale)
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 6
Site Plan With Trees (cropped)
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 7
Trees # 1, thru 4 (facing north)
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 8
Tree # 4 Oak
(DBH = 13 in.)
Trees # 5 thru 7 (facing north)
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 9
Tree # 5 Oak
(DBH = 6 in.)
Tree # 7 Oak
(DBH = 8 in.)
Tree # 8 (facing north)
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 10
Tree # 8 Ash
(DBH = 39 in.)
Trees # 9 thru 11 (facing north)
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 11
Tree # 12 (facing north)
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 12
Tree # 12 Oak
(DBH = 19 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 perimeter 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.
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. 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. 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.
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 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) 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.
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 13
Site Plan With Protection Fencing
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 14
Site Plan With Demolition Notes
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 15
Trees # 1 thru 4 “Coast live oak”
a) Structural excavation and over-excavation: The distance of the nearest structural footing of the
storage room to the trunk of # 1 Oak tree is approximately 17 ft. Protection guidelines for these four
Oak trees will be based on # 1 Oak tree because its roots are in the same general location as # 2, 3, & 4
Oak trees due to their close proximity to each other. At this distance the impact to the health of these
Oak trees is expected to be minimal.
b) New driveway: The excavation for the proposed new driveway and front door entry walkway shall be
minimally excavated and care shall be taken to protect roots on the side of the trees.
c) New Landscaping: Tilling and soil preparation within 12 ft. of these trees shall be done manually with
care to preserve the roots.
d) New Sprinklers: No broadcast trenching shall be allowed within 12 ft. of all sides of the tree trunks.
Alternatives can sometimes be accomplished by radial trenching, Tunneling under roots, and above
ground drip systems.
e) Canopy pruning: No pruning of these Oak trees will be required to complete the proposed construction
project.
f) Root pruning: any roots beyond 12 ft. of the tree trunks can be severed with a clean vertical cut with a
sharp tool such as hand pruners, loppers, handsaws, power sawzall.
g) Maintenance: During the hot summer months the trees shall be watered as needed until the sprinkler
system is installed and working.
h) Encroachment impacts: This project is expected to have a minimal impact on the short or long term
health of these trees and they are expected to survive in their existing condition if the protection
recommendations are followed and adhered to.
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 16
Trees # 5 thru 7 “Coast live oak”
a) Structural excavation and over-excavation: The distance of the nearest structural footing of the
proposed Library Room to the trunk of # 7 Oak tree is approximately 12.5 ft. Protection guidelines for
these four Oak trees will be based on # 7 Oak tree because it is the closest tree to the proposed new
building and # 5 & 6 Oak trees are further south towards the street. The impact from the landscaping,
& walkways is very similar for all three of these Oak trees. The impact of the structural footings of the
proposed new house is expected to have minimal to no impact on the short or long term health of
these trees.
b) New driveway: These Oak trees will not be impacted by the proposed new driveway because they are
on the opposite side of the property.
c) New Landscaping: Tilling and soil preparation within 8 ft. of these trees shall be done manually with
care to preserve the roots.
d) New Sprinklers: No broadcast trenching shall be allowed within 8 ft. of all sides of the tree trunks.
Alternatives can sometimes be accomplished by radial trenching, Tunneling under roots, and above
ground drip systems.
e) Canopy pruning: No pruning of these Oak trees will be required to complete the proposed construction
project.
f) Root pruning: any roots beyond 8 ft. of the tree trunks can be severed with a clean vertical cut with a
sharp tool such as hand pruners, loppers, handsaws, power sawzall.
g) Maintenance: During the hot summer months the trees shall be watered as needed until the sprinkler
system is installed and working.
h) Encroachment impacts: This project is expected to have minimal to no impact on the short or long
term health of these trees and they are expected to survive in their existing condition if the protection
recommendations are followed and adhered to.
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 17
Trees # 9 & 10 “Coast live oak”
a) Structural excavation and over-excavation: These two Oak trees will not be impacted by the structural
foundations for the rear of the proposed house because they are at a distance significantly beyond the
drip lines.
b) New walkway: The proposed concrete walkway several feet south of these Oak trees is expected to
have minimal to moderate impact to these Trees. The excavation for the walkway shall be as minimal
as possible to minimize root disturbance and loss.
c) New Landscaping: Tilling and soil preparation within 8 ft. of these trees shall be done manually with
care to preserve the roots.
d) New Sprinklers: No broadcast trenching shall be allowed within 8 ft. of all sides of the tree trunks.
Alternatives can sometimes be accomplished by radial trenching, Tunneling under roots, and above
ground drip systems.
e) Canopy pruning: No pruning of these Oak trees will be required to complete the proposed construction
project.
f) Root pruning: any roots beyond 8 ft. of the tree trunks can be severed with a clean vertical cut with a
sharp tool such as hand pruners, loppers, handsaws, power sawzall.
g) Maintenance: During the hot summer months the trees shall be watered as needed until the sprinkler
system is installed and working.
h) Encroachment impacts: This project is expected to have minimal to no impact on the short or long
term health of these trees and they are expected to survive in their existing condition if the protection
recommendations are followed and adhered to.
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 18
Tree # 11 “Coast live oak”
a) Structural excavation and over-excavation: The proposed Cabana Porch and Cabana Pool Bath are
expected to have moderate impact to this Oak tree. Following the arborist’s recommendation to
manually excavate the footings is the most effective way to minimize root disturbance and root loss.
b) New walkway: This Oak tree will not be impacted by any proposed walkways
c) New Landscaping: Tilling and soil preparation within 8 ft. of these trees shall be done manually with
care to preserve the roots.
d) New Sprinklers: No broadcast trenching shall be allowed within 8 ft. of all sides of the tree trunks.
Alternatives can sometimes be accomplished by radial trenching, Tunneling under roots, and above
ground drip systems.
e) Canopy pruning: No pruning of these Oak trees will be required to complete the proposed construction
project.
f) Root pruning: any roots beyond 8 ft. of the tree trunks can be severed with a clean vertical cut with a
sharp tool such as hand pruners, loppers, handsaws, power sawzall.
g) Maintenance: During the hot summer months the trees shall be watered as needed until the sprinkler
system is installed and working.
h) Encroachment impacts: This project is expected to have moderate impact on the short or long term
health of this tree and it is expected to survive in its existing condition if the protection
recommendations are followed and adhered to.
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 19
Tree # 12 “Laurel Oak”
a) Structural excavation and over-excavation: The proposed Cabana Porch and Cabana Pool Bath are
expected to have minimal to no impact on the long term health of this Oak tree due to its distance
from the nearest structure of 10.5 ft. at its closest point then the structure moves east and south away
from the tree.
b) New walkway: No walkways or walls are proposed that will affect this tree.
c) New Landscaping: Tilling and soil preparation within 10 ft. of these trees shall be done manually with
care to preserve the roots.
d) New Sprinklers: No broadcast trenching shall be allowed within 10 ft. of all sides of the tree trunks.
Alternatives can sometimes be accomplished by radial trenching, Tunneling under roots, and above
ground drip systems.
e) Canopy pruning: No pruning of these Oak trees will be required to complete the proposed construction
project.
f) Root pruning: any roots beyond 10 ft. of the tree trunks can be severed with a clean vertical cut with a
sharp tool such as hand pruners, loppers, handsaws, power sawzall.
g) Maintenance: During the hot summer months the trees shall be watered as needed until the sprinkler
system is installed and working.
h) Encroachment impacts: This project is expected to have minimal to no impact on the short or long
term health of this tree and it is expected to survive in their existing condition if the protection
recommendations are followed and adhered to.
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 20
Phillip Chan 400 E Wistaria Ave Arcadia, CA 91007 January 2, 2019
Javier Cabral / Consulting Arborist Pg. # 21
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 be
present at all times 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 struc tural 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 c ompleteness 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.
Phillip Chan 1605 Hyland Ave Arcadia, CA 91007 June 21, 2019
Javier Cabral / Consulting Arborist Pg. # 22