HomeMy WebLinkAboutArborist Report
1725 Grace Ave Arcadia, CA 91006
Prepared for:
Philip Chan c/o PDS Studio
711 First Ave Arcadia, CA 91006
Arcadia, CA 91006
January 1, 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
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 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
Site Plan With Trees------------------------------------------------------ pg. 6
Tree Pictures -------------------------------------------------------------- pg. 7 thru 15
Protection Guidelines ---------------------------------------------------- pg. 16 thru 19
Certificate of performance & Disclosure Statement ----------------- pg. 20
Arborist Signature Page ------------------------------------------------- Pg. 21
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
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 1725 Grace 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 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. Chan has requested that I provide the following arboricultural services.
1) Identify all significant trees and protected trees on the property and label them on the
architectural drawings as provided to the arborist by Mr. Philip Chan.
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 December 26, 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 12.
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 3
Site conditions
A one-story single-family home currently exists on this property located 1725 Grace Ave Arcadia, CA 91006.
1) There are 12 total trees on the subject property of which 3 trees are protected by the City of Arcadia Tree
Protection Ordinance due to their location and species.
2) There is 1 protected Carrotwood tree # 3 is proposed to be removed because of its condition as severely
topped tree with excessive decay. This tree has been topped to approximately 12 ft and although it is
currently growing new branches they will not be able to sustain much weight and the topping cuts will
begin to decay in the future years creating a need for excessive pruning or a hazardous condition.
Google Earth Image
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 4
1 2
3 4 5
6
7
8
9
10 11
12
General Tree Condition Rating Guidelines (one or more of the below mentioned defects may not be present but
one or more may be so extensive that it may downgrade a tree that would otherwise qualify for example, a (C)
grade to a (D) grade due to the severity of the individual defect. As the consulting arborist I will make any
annotation when the aforementioned is the case so that the grade is better understood. Each tree will be rated as an
individual tree with its structure, canopy, and root system.
List Inventory pg. 1
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 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.
Sit Plan With Trees (Full scale)
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 6
Trees # 1 thru 3 (facing southwest)
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 7
Tree # 3 (facing decaying branch) This tree has been cut severely for many years and the scaffold
branches has been exposed to direct sunlight and the tops of the main branches have been exposed to
sunscald. The branch below comprises approximately half of the total canopy and is the most severely
affected. Decay can be expected to increase further from the sunscald and the topping cuts making this
tree a hazard to people and property and removal is recommended.
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 8
# 3 large decayed section along a large
section of the 17 in. dbh scaffold branch
# 3 large decayed section along a large
section of the 17 in. dbh scaffold branch
# 3 large decayed section along a large
section of the 17 in. dbh scaffold branch
# 3 large decayed section along a large
section of the 17 in. dbh scaffold branch
Tree # 3 (epicormic shoots growing from large topping cuts)
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 9
# 3 profuse re-sprouting from area
surrounding large topping cuts
Tree # 3 (epicormic shoots growing from large topping cuts)
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 10
# 3 profuse re-sprouting from area
surrounding large topping cuts
# 3 profuse re-sprouting from area
surrounding large topping cuts
Trees # 4 & 5 (facing west)
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 11
# 5 Blue spruce
(DBH = 8 in.)
# 4 King palm
(DBH = 3+3 in.)
Trees # 6 & 7 (facing northwest)
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 12
# 7 Persimmon
(DBH 4+4+4+4+10 in.)
# 6 Persimmon
(DBH 2+4+11 in.)
Trees 8 & 9 (facing northwest)
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 13
# 8 Avocado
(DBH 2+2+2 in.)
# 9 Persimmon
(DBH 4+9 in.)
Trees 10 & 11 (facing northwest)
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 14
# 10 Persimmon
(DBH 4+4+5+5 in.)
# 11 Persimmon
(DBH 7 in.)
Tree 12 (facing east)
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 15
# 12 Lemon
(DBH 1+1+1+1+1+1+1 in.)
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.
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 16
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.
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 17
Site Plan With Protection Fencing (full scale)
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 18
Tree # 1 & 2 Crape myrtle Protection Details
a) Structural excavation and over-excavation: Tree # 1 & 2 are at a distance of more than (28 ft) from the
west edge of the proposed home. At this distance the impact to the trees from the excavation for the
house footings is expected to be zero.
b) New Concrete Walkway: The proposed concrete walkway between the two trees is at approximately
(11 ft. from Tree 1) and (8 ft. from Tree # 2) At this distance the impact is expected to be zero to
minimal.
c) New Landscaping: No new plants shall be planted within 8 ft. of the trunk of these trees. Mulch shall be
kept at least 6 inches from the edge of the tree trunks on all sides of the tree including rock mulch.
d) New Sprinklers: No trenching for sprinklers shall be performed within 8 ft. of the edge of the tree trunk
on all sides of this tree.
e) Canopy pruning: No pruning of this tree will be required to complete the proposed construction project.
f) Root pruning: Roots beyond 8 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 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 zero impact on the short- or long-
term health of these two Crape myrtle trees and they are expected to survive in good health if the
protection recommendations are followed and adhered to.
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 19
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 Arboris ts 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 and the
client to whom the report was provided to. An y 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 guaran tee 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 scop e 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.
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 20
Philip Chan “PDS Studio” 1725 Grace Ave Arcadia, CA 91006 January 1, 2020
Javier Cabral / Consulting Arborist Pg. # 21