HomeMy WebLinkAboutArborist Report
84 W Magna Vista Ave Arcadia, CA 91007
Prepared for:
Architect Suns, Inc
3018 E Colorado Blvd Suite #150
Pasadena, CA 91107
June 27, 2021
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
Young “SWS Design INC.” 84 W Magna Vista Ave Arcadia, CA 91007 June 27, 2021
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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 & 7
Tree Pictures ------------------------------------------------------------- pg. 8 thru 14
Protection Guidelines --------------------------------------------------- pg. 15 thru 20
Arborist Signature Page ------------------------------------------------ pg. 21
Certificate Of Performance -------------------------------------------- pg. 22
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Summary
Mr. Young,
You have retained my consulting arborist services to provide a tree inventory and protection plan for the
property described as 84 W Magna Vista Ave Arcadia, CA 91007. You are in the planning process of
demolishing the existing home and redeveloping the lot with a new one-story single-family home and an
accessory dwelling unit in the rear.
The proposed demolition and construction are expected to have zero 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. All protected trees are expected to survive in good health.
Background and assignment
Mr. Young 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.Young.
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 June 24, 2021 and my analysis of the trees, site plan,
and surrounding landscape. For the purpose of this report I will address these trees as on-site Trees # 1
thru 13 No off-site trees will be inventoried or impacted by the proposed construction project.
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Site conditions
There is currently a one-story single-family home on this property located at 84 W Magna Vista Ave Arcadia, CA
91107.
1) There are (13) total trees on the subject project property of which only (1) city owned tree qualifies for
protection per the City of Arcadia Tree Protection Ordinance.
2) No protected trees are proposed to be removed for this project and encroachment is expected to be zero to
for all The City owned tree.
Google Earth Image
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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 th at
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
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Site Plan With Trees (full scale)
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Site Plan With Trees (cropped)
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Tree # 1 (facing south)
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# 1 Holly oak
Tree # 2 (facing south)
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# 2 Australian willow
Tree # 3 (facing south)
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# 3 Grapefruit
Tree # 4 (facing west)
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# 4 Lime
Trees # 5 thru 8 (facing northwest)
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# 8 American hackberry
Tree # 9 thru 11 (facing west)
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# 11 American hackberry
Tree # 12 (facing south)
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# 12 American hackberry
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.
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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.
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Site Plan With Protection Fencing (cropped)
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Site Plan With Demolition Notes (cropped)
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Site Plan With Cypress Recommendation
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Trees # 1 Holly Oak Protection Details
a) Structural excavation and over-excavation: The impact of structural excavations for this tree is
expected to be zero because there are no excavations for the foundations near the drip line of this tree.
b) New Landscaping: No plants shall be planted within 5 ft. of the tree trunk on all sides of the tree. If roots
greater than 2 inches are encountered during excavation of the holes and the root must be severed the
plant shall be moved to a location where roots are not severed unless they are less than 2 inches.
c) New Sprinklers: No broadcast excavation for sprinklers shall be allowed within 10 ft. of the trunk of this
tree on all sides of this tree. Above ground drip is recommended when possible to prevent digging and
root loss and disturbance.
d) Canopy pruning: No pruning of these trees will be required to complete the proposed construction
project.
e) Root pruning: All roots that are severed under the drip line of the tree shall be performed with sharp
tools that make a clean vertical cut that does not tear or pull roots out of the ground.
f) Protection Fencing: shall consist of 6 ft. high chain-link free-standing panels or attached to posts
hammered into the soil 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 this tree shall be watered as needed until the sprinkler
system is installed and working.
h) Encroachment impacts: This project is expected to have 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. Minimal impact means that no roots greater than two
inches are expected to be impacted and no interruption to water uptake or nutrient production,
transportation, or storage. Tree stability and anchorage, trunk, branch, and leaves are not expected to
be impacted.
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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 o r 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 doc umentation
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 prope rty 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 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 condi tion 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, 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.
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