HomeMy WebLinkAboutItem 4a. 1422 Monterey St. (ARCH-0020-2022)_Arborist Report_High Quality
Arborist Report
Project: 1422 Monterey Street
Project # 2212-01-RS21
Location: San Luis Obispo, CA
Date: June 18, 2021
Prepared For: The Housing Authority of San Luis Obispo (HASLO)
487 Leff Street
San Luis Obispo, CA 93401
Prepared By: Jake Minnick, PLA
ISA Certified Arborist #WE-11830A
RRM Design Group
3765 S Higuera St. Suite 102
San Luis Obispo, CA 93401
Table of Contents
Page
Introduction and Overview 2
Methodology 2
Summary of Findings 2
Planned Improvements 3
Specific Species Recommendations 3
Municipal Code Governing Trees 5
Recommendations for Trees During Construction 5
Maintenance Recommendations for Trees to Remain 6
Table 1 - Tree Quantity Summary 8
Table 2 - Tree Evaluation Summary 9
Exhibit A - Tree Location Map 14
Exhibit B - Tree Photographs 15
Terms and Conditions 28
Introduction and Overview
RRM Design Group was contracted by HASLO to complete a tree inventory and arborist report
as part of an initial study of a proposed development project. On June 10, 2021, RRM Design
Group conducted a tree inventory of 60 trees located within and immediately adjacent to, the two
lots located at 1422 and 1480 Monterey Street in San Luis Obispo, CA (APN 001-137-015 & 013).
The land is bounded by Palm Street and several homes to the north, Monterey Street to the south,
California Boulevard and a medical office to the east, and a Union Pacific Railroad (UPRR) Right-
of-Way to the west. Currently, the land is being used as a mixture of retail, commercial office
space, parking, and vacant land.
Our scope of services includes tagging and inventorying existing trees located within the project
limit of work. The existing tree inventory includes measuring diameter at breast height (DBH),
assessing trees for health and preservation suitability, and cataloging photographs of the
condition of all trees. Health conditions and preservation suitability are based on current site
conditions. Site development/design may affect these assessments.
Methodology
Our tree survey work is a deliberate and systematic methodology for cataloging trees on site:
1. Identify each tree species.
2. Tag each tree with a metal tag or utilize existing metal tags and note the location on a site
map.
3. Measure each tree Diameter at Breast Height (DBH) at 54" above grade per ISA
standards*.
a. *An exception was made for three trees included in this report due to
inaccessibility. These trees are noted in Exhibit B – Tree Evaluation Summary with
an asterisk in the DBH column. The DBH of these trees are estimated based on
the best vantage possible.
4. Evaluate the health and preservation suitability of each tree based on the current site
conditions.
Summary of Findings
The 60 trees observed on this site represent a diverse canopy of 21 different species with no one
species making up more than 15% of the overall distribution. There are eight trees that are
regionally native. Generally, the health of the trees inspected is moderate. Several trees are
exhibiting signs of stress like pests, crown dieback, epicormic, and sucker growth. Additionally,
several trees have structural defects that may be considered hazardous.
There were seven species of invasive trees found naturalizing along the eastern and western
property boundaries. These species are all listed on the California Invasive Plant Council’s (Cal-
IPC) list of invasive plants with varying levels of regional concern. Species found on the eastern
side of the site were found originating from a small portion of exposed drainage channel. Some
species on the western side of the site were found originating from the UPRR Right-of-Way and
some were intentionally planted. Some of these species, like the Victorian box trees for example,
have not spread and appear to be localized on the site. Others, like the tree of heaven specimens
have spread to the site from offsite locations and begun to naturalize on site.
Refer to the Specific Species Recommendations section below for additional findings.
Refer to the following supplemental documents for additional information:
Arborist Report - 1422 Monterey Street
June 18, 2021 2
o Table 1 – Tree Quantity Summary for quantities of trees by size, species, and regional
nativity status.
o Table 2 - Tree Evaluation Summary for sizes, notes and recommendations for each tree.
o Exhibit A - Tree Location Map for tree locations relative to the existing site conditions.
o Exhibit B – Tree Photographs for numbered photographs of each tree.
Planned Improvements
The preliminary project plans were reviewed during an April 29, 2021 preapplication meeting with
City of San Luis Obispo Staff, RRM Design Group, and HASLO. Our initial review indicates that
the planned improvements show potential conflicts with most of the trees inventoried. Building
locations and proposed changes to the existing topography will require the removal of most onsite
trees and several offsite trees may be affected as well. During the pre-application meeting, there
was discussion of a roadway dedication to widen Monterey Street. It is likely that any changes to
the roadway will impact the two offsite street trees #57 & 59 in the Monterey Street Right-of-Way,
and it is unclear how the public street improvements may impact offsite street tree #14 located in
the Palm Street Right-of-Way.
Strategic changes to the proposed design plans may reduce impacts to offsite trees, but the
proposed land-use changes coupled with steep natural grades will make the preservation of
onsite trees challenging at best.
Specific Species Recommendations
Species: Acacia melanoxylon (black acacia)
Quantity: 5
Observations: Several of the black acacia trees are performing poorly, which may be attributed
to past construction damage, overcrowding, and/or poor arboricultural practices.
Tree #13 is of the most concern. This tree spans the sidewalk on Palm Street and has several
structural defects that could be considered hazardous. It is unclear what caused the strange
attachment of the four main stems at the root collar, but the tree’s form is not typical of the species.
Use of a sounding mallet indicates that there is a large cavity of decayed heartwood near the root
collar of one of the leaders.
Tree #20 is in poor health and declining. The source of stress associated with the decline of this
tree can likely be traced to the installation of a 2’-0” retaining wall and fill soil over approximately
50% of the tree’s root zone many years ago. The face of the wall is pressing against the trunk
and much of the tree’s crown has died back as a result of the impacts.
Recommendations: Remove trees #13 and 20.
Species: Ailanthus altissima (tree of heaven)
Quantity: 4
Observations: These four tree of heaven specimens are naturalizing along the section of
exposed drainage channel on the eastern side of the site. This species is known to be weedy and
is of particular concern in California. There is evidence that several of these have been topped
and cut back in previous years but being quick and aggressive growers, they have come right
back. Now several show early signs of structural defects that may compromise the structure as
they mature.
Arborist Report - 1422 Monterey Street
June 18, 2021 3
Recommendations: Remove all tree of heaven specimens and seedlings growing on site to
reduce the threat of naturalization in the surrounding area.
Species: Grevillea robusta (silk oak tree)
Quantity: 5
Observations: The silk oak trees form a windrow along the western property boundary. The
larger specimens are showing their age and beginning to die back in some areas of the crown.
There are several stumps and large rounds surrounding tree #25, and it looks like several large
stems were removed within the last few years. The centers of the stumps and rounds have large
cavities that indicate these stems may have been compromised by decay and removed. This
species of Grevillea is known to be invasive in California, and although it has not spread around
this site aggressively, there are two specimens located in the UPRR ROW to the west that likely
originated from this windrow planting.
Recommendations: Continue to monitor these trees for indications of increased crown dieback.
If any are to remain consider consulting with a Tree Risk Assessment Qualified (TRAQ) arborist
to identify any cavities within these trees that may create a hazardous situation.
Species: Pittosporum undulatum (Victorian box)
Quantity: 9
Observations: Generally, the Victorian box trees on site are in poor health, and several have
structural defects from poor arboricultural practices. The specimens located near the western
property line are much larger than those located in the courtyard between the buildings onsite.
The specimens located in the courtyard area have structural defects from poor arboricultural
practices and they are stressed due to lack of water and severe overcrowding. This species is
also recognized to be invasive in California, and although it is common to see these naturalizing
locally in San Luis Obispo County, it does not appear they have spread from this site.
Recommendations: Remove specimens noted with a poor preservation suitability in Table 2 –
Tree Evaluation Summary. These are structurally compromised, or they are being outcompeted
in an overcrowded planter and will not recover.
Species: Pyrus kawakamii (evergreen pear)
Quantity: 4
Observations: Evergreen pear #33 is a moderately sized specimen for the species with good
structure and form. There are several topping cuts in the crown, but none that affect the structure
today. The remaining three specimens are in various stages of decline with dieback from a
moderate Fire Blight infection. There is evidence that these trees have been over pruned routinely
and the planter areas lack supplemental irrigation. It is likely that a long history of overpruning
and underwatering has contributed to the decline of these trees.
Recommendations: Avoid topping cuts during routine maintenance activities. Although this
species has low – moderate water needs, it does need supplemental water during the summer
and into fall. Consider the removal of specimens noted with a poor preservation suitability in Table
2 – Tree Evaluation Summary.
Species: Quercus agrifolia (coast live oak)
Quantity: 6
Observations: Four of the coast live oaks (#8, 10, 11, 12) are located near a small section of
exposed drainage channel on the eastern side of the site. These trees look to have naturalized in
the area and are growing in very crowded conditions. These coast live oaks front a section of the
Arborist Report - 1422 Monterey Street
June 18, 2021 4
parking lot and have been sheered into a large screen hedge on that side. The crowded growing
conditions and hedging that these young trees are experiencing will lead to structural defects as
they mature.
One coast live oak (#18) is located offsite along the western property line in the UPRR right-of-
way. This is a healthy specimen with good structure, and it appears to have naturalized in this
location many years before the silver wattle that it is now being outcompeted by (#17).
The last coast live oak (#55) is located nearby the southeastern parking lot of the site. Although
the main stem has a moderate lean to access more sunlight below the crown of tree #56, it is in
moderate health with good structure.
Recommendations: Young coast live oak trees in moderate to good health tend to respond well
to construction impacts. With #12 as the exception, the coast live oaks on this site are in moderate
health and will respond well to impacts within the tree protection zone if no more than 25% of the
roots are impacted in that area.
Species: Sequoia sempervirens (coast redwood)
Quantity: 9
Observations: Most of the coast redwoods located onsite are showing typical signs of stress for
the species. These signs of stress are typically observed as high crown opacity, low vigor, and in
some circumstances, extensive suckering around the root collar. Regionally, the source can
typically be attributed to long periods of drought. Generally, the coast redwoods located nearby
irrigation sources showed signs of decreased crown opacity and increased vigor.
Recommendations: Any coast redwoods to remain should be carefully assessed before
construction to determine a feasible approach to minimize construction related impacts to the tree
protection zone. If any are proposed to remain, sufficient water should be provided during and
after construction, and root pruning in the tree protection zone should be avoided on any
specimens with a health rating of 3 or lower in Table 2 – Tree Evaluation Summary. Preservation
of specimens with a health rating of 2 or lower is not recommended if impacts to the tree protection
zone cannot be avoided.
Municipal Code Governing Trees
Refer to Chapter 12.24 of the City of San Luis Obispo’s Municipal Code, passed on April 6, 2021.
Recommendations for Trees During Construction
Site preparation: All existing trees to remain shall be fenced off to the drip line of the tree. Where
fencing is not possible, the trunk shall be wrapped with a straw waddle and orange snow fencing.
Tree protection fencing should be a minimum of six feet high, made of pig wire with steel stakes
or any material superior in quality, such as cyclone fencing. A tree protection zone sign shall be
affixed to the fencing at appropriate intervals as determined by the arborist on site. If the fence is
within the drip line of the trees, the crown shall be raised to offset the chance of limb breakage
from construction equipment encroaching within the drip line. All contractors, subcontractors and
other personnel shall be warned that encroachment within the fenced area is forbidden without
the consent of the Project Arborist. This includes, but is not limited to, storage of lumber and other
materials, disposal of paints, solvents or other noxious materials, parked cars, grading equipment
or other heavy equipment. Penalties, based on the cost of remedial repairs and the evaluation
guide published by the international society of arboriculture, shall be assessed for damages to
the trees.
Arborist Report - 1422 Monterey Street
June 18, 2021 5
Grading/excavating: All grading plans that specify grading within the drip line of any tree, or
within the distance from the trunk as outlined in the site preparation section above when said
distance is outside the drip line, shall first be reviewed by a certified arborist. Provisions for
aeration, drainage, pruning, tunneling beneath roots, root pruning or other necessary actions to
protect the trees shall be outlined by an arborist. If trenching is necessary within the area as
described above, said trenching shall be undertaken by hand labor and dug directly beneath the
trunk of the tree. All roots 2 inches or larger shall be tunneled under and other roots shall be cut
smoothly to the trunk side of the trench. The trunk side should be draped immediately with two
layers of untreated burlap to a depth of 3 feet from the surface. The burlap shall be soaked nightly
and left in place until the trench is back filled to the original level. An arborist shall examine the
trench prior to back filling to ascertain the number and size of roots cut, to suggest the necessary
remedial repairs.
Remedial repairs: An arborist shall have the responsibility of observing all ongoing activities that
may affect the trees and prescribing necessary remedial work to ensure the health and stability
of the trees. This includes, but is not limited to, all arborist activities brought out in the previous
sections. In addition, pruning, as outlined in the "pruning standards" of the western chapter of the
International Society of Arboriculture, shall be prescribed as necessary. Fertilizing, aeration,
irrigation, pest control and other activities shall be prescribed according to the tree needs, local
site requirements, and state agricultural pest control laws. All specifications shall be in writing.
For pest control operations, consult the local county agricultural commissioner's office for
individuals licensed as pest control advisors or pest control operators.
Final inspection: Upon completion of the project, the arborist shall review all work undertaken
that may impact the existing trees. Special attention shall be given to cuts and fills, compacting,
drainage, pruning and future remedial work. An arborist should submit a final report in writing
outlining the ongoing remedial care following the final inspection.
Maintenance Recommendations for Trees to Remain
Regular maintenance, designed to promote plant health and vigor, ensures longevity of existing
trees. Regular inspections and the necessary follow-up care of mulching, fertilizing, and pruning,
can detect problems and correct them before they become damaging or fatal.
Tree Inspection: Regular inspections of mature trees at least once a year can prevent or reduce
the severity of future disease, insect, and environmental problems. During tree inspection, four
characteristics of tree vigor should be examined: new leaves or buds, leaf size, twig growth, and
absence of crown dieback (gradual death of the upper part of the tree). A reduction in the
extension of shoots (new growing parts), such as buds or new leaves, is a reliable cue that the
tree’s health has recently changed. Growth of the shoots over the past three years may be
compared to determine whether there is a reduction in the tree’s typical growth pattern. Further
signs of poor tree health are trunk decay, crown dieback, or both. These symptoms often indicate
problems that began several years before. Loose bark or deformed growths, such as trunk conks
(mushrooms), are common signs of stem decay. Any abnormalities found during these
inspections, including insect activity, and spotted, deformed, discolored, or dead leaves and twigs,
should be noted and observed closely.
Mulching: Mulch, or decomposed organic material, placed over the root zone of a tree reduces
environmental stress by providing a root environment that is cooler and contains more moisture
than the surrounding soil. Mulch can also prevent mechanical damage by keeping machines such
as lawn mowers and string trimmers away from the tree’s base. Furthermore, mulch reduces
Arborist Report - 1422 Monterey Street
June 18, 2021 6
competition from surrounding weeds and turf. To be most effective, mulch should be placed 2 to
4 inches deep and cover the entire root system, which may be as far as 2 or 3 times the diameter
of the branch spread of the tree. If the area and activities happening around the tree do not permit
the entire area to be mulched, it is recommended that as much of the area under the drip line of
the tree is mulched as possible. When placing mulch, care should be taken not to cover the actual
trunk of the tree. This mulch-free area, 1 to 2 inches wide at the base, is sufficient to avoid moist
bark conditions and prevent trunk decay. An organic mulch layer 2 to 4 inches deep of loosely
packed shredded leaves, pine straw, peat moss, or composted wood chips is adequate. Plastic
should not be used as it interferes with the exchange of gases between soil and air, which inhibits
root growth. Thicker mulch layers, 5 to 6 inches deep or greater, may also inhibit gas exchange.
Fertilization: Trees require certain nutrients (essential elements) to function and grow. Urban
landscape trees may be growing in soils that do not contain sufficient available nutrients for
satisfactory growth and development. In certain situations, it may be necessary to fertilize to
improve plant vigor. Fertilizing a tree can improve growth; however, if fertilizer is not applied
wisely, it may not benefit the tree at all and may even adversely affect the tree. Mature trees
making satisfactory growth may not require fertilization. When considering supplemental fertilizer,
it is important to consider nutrients deficiencies and how and when to amend the deficiencies.
Soil conditions, especially pH and organic matter content, vary greatly, making the proper
selection and use of fertilizer a somewhat complex process. To that end, it is recommended that
the soil be tested for nutrient content. A soil testing laboratory and can give advice on application
rates, timing, and the best blend of fertilizer for each tree and other landscape plants on site.
Mature trees have expansive root systems that extend from 2 to 3 times the size of the leaf
canopy. A major portion of actively growing roots is located outside the tree’s drip line.
Understanding the actual size and extent of a tree’s root system before applying fertilizer is
paramount to determine quantity, type, and rate at which to best apply fertilizer. Always follow
manufacturer recommendations for use and application.
Pruning: Pruning is often desirable or necessary to remove dead, diseased, or insect-infested
branches and to improve tree structure, enhance vigor, or maintain safety. Because each cut has
the potential to change the growth of (or cause damage to) a tree, no branch should be removed
without reason. Removing foliage from a tree has two distinct effects on growth: (1) it reduces
photosynthesis and, (2) it may reduce overall growth. Pruning should always be performed
sparingly. Caution must be taken not to over-prune as a tree may not be able to gather and
process enough sunlight to survive. Pruning mature trees may require special equipment, training,
and experience. Arborists are equipped to provide a variety of services to assist in performing
the job safely and reducing risk of personal injury and property.
Removal: There are circumstances when removal is necessary. An arborist can help decide
whether a tree should be removed. Professionally trained arborists have the skills and equipment
to remove trees safely and efficiently. Removal is recommended when a tree: (1) is dead, dying,
or considered irreparably hazardous; (2) is causing an obstruction or is crowding and causing
harm to other trees and the situation is impossible to correct through pruning; (3) is to be replaced
by a more suitable specimen, and (4) should be removed to allow for construction. Pruning or
removing trees, especially large trees, can be dangerous work. It should be performed only by
those trained and equipped to work safely in trees.
Arborist Report - 1422 Monterey Street
June 18, 2021 7
Species Quantity % of Site
Acacia melanoxylon 5 8%
Acacia dealbata 2 3%
Ailanthus altissima 4 7%
Cupaniopsis anacardioides 1 2%
Ficus microcarpa 2 3%
Grevillea robusta 5 8%
Jacaranda mimosifolia 1 2%
Juglans hindsii 1 2%
Lagunaria patersonia 1 2%
Myoporum laetum 1 2%
Phoenix canariensis 1 2%
Pittosporum undulatum 9 15%
Prunus ilicifolia 1 2%
Pyrus kawakamii 4 7%
Quercus agrifolia 6 10%
Schinus molle 2 3%
Sequoia sempervirens 9 15%
Ulmus americana 1 2%
Ulmus parvifolia 1 2%
Ulmus procera 2 3%
Xylosma congestum 1 2%
Total 60 100%
DBH Quantity % of Site
<20"40 67%
>20"17 28%
Total 60 100%
Regional Nativity Quantity % of Site
Native 8 13%
Non-Native 52 87%
Total 60 100%
Tree Quantity by Species
Table 1 - Tree Quantity Summary
Tree Quantity by Size
Tree Quantity by Regional Nativity Status
Arborist Report - 1422 Monterey Street
June 18, 2021 8
5
4
3
2
1
Good
Mod.
Poor
High
Mod.
Low
High
Mod.
Low
BL Blight
CD Codominant leaders
CDB Crown Dieback
CR CR
D Decline
DBH Diameter at Breast
Height
EG Epicormic Growth
EH Exposed Heartwood
H Hazardous
IB Included Bark
LC Low crotch
LN Lean
ML Multiple Leaders
S Suckers
Evidence of fire blight, a disease that causes vascular wilt in many varieties of pome trees.
Forked leaders nearly the same size in diameter, arising from a common junction an lacking a normal branch union.
Condition where branches in the tree crown die from the tips toward the center.
Tree is bounded closely by one or more of the following: structure, tree, large shrub.
Tree shows obvious signs of decline, which may be indicative of the presence of multiple biotic and abiotic disorders.
Measurement of tree diameter in inches. Measurement height varies by agency and is noted above.
Abbreviations and Definitions
Multiple central leaders originating below the DBH measurement site.
Tree leaning, see notes for severity.
More than one upright primary stem.
Shoot arising from the roots.
Watersprouting on trunk and main leaders. Typically indicative of tree stress.
Exposure of the tree's heartwood is typically seen as an open wound that leaves a tree more susceptible to pathogens, disease or infection.
A tree that currently presents a hazard.
Structural defect where bark is included between the branch attachment. Contributes to a higher probability of failure during a storm event.
Trees with a healthy thick crown that matches their species characteristics. Visually, it is difficult to see the sky through the crown.
Table 2 - Tree Evaluation Summary
Prepared By: Jake Minnick, ISA Certified Arborist #WE-11830A
DBH Measurement Height: 54"
Date of Evaluation: 06/10/2021
Health Rating
Trees with good vigor and slight signs of stress
Preservation Suitability
Trees in decline
Trees with a thin crown charactarized by lack of old growth and small quantities of newer growth. Visually, the sky shows through the crown.
Trees with a moderately thin crown, or areas of the crown that lack full growth associated with low opacity.
Trees in poor health or with significant structural defects that cannot be mitigated. Tree is expected to decline, regardless of treatment.
Vigor
Trees putting on healthy, new growth, flowers, and/or fruit.
Trees putting on new growth, but showing signs of stress.
Trees with moderate vigor and moderate signs of stress
Trees with good vigor and reasonably free of pests and disease, with good form typical of the species
Trees in severe decline
Trees putting on most of their new growth as epicormic shoots with signs of severe stress. There may be areas of dieback or decay in the crown.
Trees with good health and structural stability that have the potential for longevity at the site.
Crown Opacity
Trees in somewhat declining health and/or exhibits structural defects that cannot be abated with treatment. Trees will require more intense management and will have a
shorter lifespan than those in the 'Good' category.Arborist Report - 1422 Monterey StreetJune 18, 20219
SD Structural Defects
SE Severe
SL Slight
TP Topped
ST Stress
WU Weak Union
*
Tree
Tag Botanical Name Common Name
Diameter at
Breast Height
(in.)
Multi Leader
Individual DBH
(in.)
Approx.
Dripline Ø
(ft.)
Regional
Native
Health
Rating
Preservation
Suitability Vigor Crown
Opacity Field Notes
1 Ailanthus altissima tree of heaven 6.5 3, 3.5 10 4 Poor High Low
TP, CD, IB, located
on top of culvert -
shallow soil
2 Juglans hindsii
Northern
California black
walnut
11.0 20 X 2 Poor Moderate High
ST, LN, CD, IB, EG,
fill in CRZ, located in
creek
3 Ulmus procera English elm 11.5 5, 6.5 15 3 Moderate Moderate Moderate CD, IB, CR
4 Ulmus procera English elm 5.5 15 3 Moderate Moderate Moderate CR, EG, ST, LN
5 Schinus molle California
pepper 30.0*25 3 Moderate Moderate Moderate ST, CR, located on
steep creek bank
6 Ailanthus altissima tree of heaven 7.0 4, 2, 1 10 3 Poor High High TP, CR
7 Ailanthus altissima tree of heaven 7.0 3.5, 2.5, 1 10 3 Moderate High High CR, LC
8 Quercus agrifolia coast live oak 12.5 9, 3.5 10 X 4 Moderate Moderate Moderate CR, SE LN, EG, SL ST,
hedged
9 Ailanthus altissima tree of heaven 12.5 2.5, 4, 4, 2 10 3 Moderate High High CR, LC
10 Quercus agrifolia coast live oak 9.5 20 X 3 Moderate Moderate Moderate CR, LN, EG, SL ST,
hedged
11 Quercus agrifolia coast live oak 13.0 6.5, 6.5 15 X 3 Moderate Moderate Moderate CR, SL LN, CD, IB, SL
ST, EG, hedged
12 Quercus agrifolia coast live oak 5.5 8 X 3 Poor Low Moderate CR, LN, under crown
of tree 11
13 Acacia melanoxylon black acacia 34.0 13, 13, 8 20 3 Poor Moderate Moderate
SE LN, ST, EG, SR,
H, SD, EH, large
cavity at root collar
on one stem
Naturally or secondary conditions including cavities, poor branch attachments, cracks, or decayed wood in any part of the tree that may contribute
to structural failure.
Indicates the severity of the following term.
Indicates the mildness of the following term.
Poor pruning practice of main leaders. Often practiced under utility lines to limit tree height.
Environmental factor inhibiting regular tree growth. Includes drought, salty soils, nitrogen and other nutrient deficiencies in the soil.
Weak union or fork in tree branching structure.
Indicates an estimated DBH measurement due to dense vegetation and/or hazardous circumstances prohibiting safe access.
Abbreviations and Definitions Continued
Arborist Report - 1422 Monterey StreetJune 18, 202110
Tree
Tag Botanical Name Common Name
Diameter at
Breast Height
(in.)
Multi Leader
Individual DBH
(in.)
Approx.
Dripline Ø
(ft.)
Regional
Native
Health
Rating
Preservation
Suitability Vigor Crown
Opacity Field Notes
14 Jacaranda
mimosifolia jacaranda 10.0 15 3 Moderate Low Moderate
CR, LN, SL ST, root
barrier installed
incorrectly
15 Ulmus americana American elm 14.0 25 3 Moderate Moderate Low SL ST, EG, SL LN, CD,
IB
16 Acacia dealbata silver wattle 26.5 12, 14.5 25 2 Poor Low High CD, IB, ST, EG, CR
17 Acacia dealbata silver wattle 20.0 9, 11 20 3 Moderate Moderate Moderate LC, LN, IB, CD, CR
18 Quercus agrifolia coast live oak 12.0 25 X 4 Moderate Moderate Low LN, SL ST, SL oak twig
blight infection, galls
19 Prunus ilicifolia hollyleaf cherry 25.5 7, 4.5, 7.5, 6.5 25 X 1 Poor Low High TP, CD, D, EH, LC, EG,
S
20 Acacia melanoxylon black acacia 37.5 25, 5, 7.5 15 1 Poor Low High D, CDB, S, EH, fill in
CRZ
21 Grevillea robusta silk oak tree 25.0 20 2 Poor Low High CDB, ST, CD
22 Grevillea robusta silk oak tree 13.5 20 3 Moderate Moderate Moderate CR, SL CDB, SL ST
23 Grevillea robusta silk oak tree 21.0 20 3 Moderate Moderate Moderate CR, SL CDB, SL ST,
SL LN, TP
24 Grevillea robusta silk oak tree 24.0 20 3 Moderate Moderate Moderate CR, SL CDB, SL ST,
TP
25 Grevillea robusta silk oak tree 29.5 25 3 Moderate Moderate Moderate SL CDB, SL ST
26 Schinus molle California
pepper 19.0 25 3 Moderate Low Moderate SE LN, CR, under
crown of tree 25
27 Phoenix canariensis Canary Island
date palm 50.0*20 4 Moderate High Low CR
28 Xylosma congestum shiny xylosma 8.0*10 3 Poor Moderate Low LN, CR, sooty black
mold, hedged
29 Pittosporum
undulatum Victorian box 8.5 2.5, 3, 3 10 2 Poor Low Moderate LC, ST, EG, S, CR,
SD, LN
30 Myoporum laetum mousehole tree 12.0 8, 1.5, 2.5 10 2 Poor Low Moderate SD, SE LN, CR
31 Pittosporum
undulatum Victorian box 10.0 20 3 Moderate Low Moderate SD, EG, LN, CR Arborist Report - 1422 Monterey StreetJune 18, 202111
Tree
Tag Botanical Name Common Name
Diameter at
Breast Height
(in.)
Multi Leader
Individual DBH
(in.)
Approx.
Dripline Ø
(ft.)
Regional
Native
Health
Rating
Preservation
Suitability Vigor Crown
Opacity Field Notes
32 Pittosporum
undulatum Victorian box 33.5 13.5, 11, 9 20 2 Poor Low High LC, ST, EG, EH, D,
SD, chlorotic
33 Pyrus kawakamii evergreen pear 14.0 20 3 Moderate Moderate Low TP, BL, SL LS, SL
LN
34 Acacia melanoxylon black acacia 13.5 15 3 Poor Moderate Moderate
SE CR, SL LN, crown
unbanlanced. 6" from
foundation
35 Pyrus kawakamii evergreen pear 9.5 20 2 Moderate Moderate High BL, SL CDB, SL ST
36 Pyrus kawakamii evergreen pear 8.0 15 2 Poor Low High BL, CDB, ST LN
37 Pittosporum
undulatum Victorian box 13.0 2, 2, 2, 1.5,
1.5, 1, 1, 1, 1 12 2 Poor Moderate High LC, IB, SR, CDB, ST,
CR, LN
38 Pittosporum
undulatum Victorian box 4.5 3.5, 1 6 2 Poor Low High SR, CDB, CR, LN,
ST
39 Pittosporum
undulatum Victorian box 18.0 4.5, 3, 2.5, 2.5,
2.5, 1, 1, 1 12 2 Poor Moderate High LC, IB, SR, CDB, ST,
CR, LN
40 Pittosporum
undulatum Victorian box 10.5 3.5, 4, 1, 1, 1 15 2 Poor Low High LC, IB, SR, CDB, ST,
CR, LN
41 Lagunaria patersonia primrose tree 41.0 14.5, 12.5, 14 25 3 Poor Moderate Low ST, SD, LC, EG, H,
CR
42 Acacia melanoxylon black acacia 35.0 14, 7.5, 6, 7.5 20 1 Poor Low High D, SD, H, EH
43 Pittosporum
undulatum Victorian box 8.0 3, 2.5, 2.5 15 2 Poor Moderate High LC, IB, SR, CDB, ST,
CR, LN
44 Acacia melanoxylon black acacia 11.0 15 3 Moderate Moderate Moderate SR, CR
45 Sequoia
sempervirens coast redwood 9.0 15 1 Poor Low High D, S, CDB
46 Sequoia
sempervirens coast redwood 5.5 15 3 Moderate Moderate Moderate SL ST, S, SL LN, SL
CR
47 Pyrus kawakamii evergreen pear 4.5 10 2 Poor Low Moderate BL, SL CDB, CR. 18"
from foundation
48 Sequoia
sempervirens coast redwood 14.0 15 3 Moderate Moderate Moderate CR, S
49 Sequoia
sempervirens coast redwood 13.0 10 3 Moderate Moderate Moderate CR, S Arborist Report - 1422 Monterey StreetJune 18, 202112
Tree
Tag Botanical Name Common Name
Diameter at
Breast Height
(in.)
Multi Leader
Individual DBH
(in.)
Approx.
Dripline Ø
(ft.)
Regional
Native
Health
Rating
Preservation
Suitability Vigor Crown
Opacity Field Notes
50 Sequoia
sempervirens coast redwood 17.0 15 3 Moderate Moderate Moderate CR, S
51 Pittosporum
undulatum Victorian box 14.0 3, 3, 3.5, 2.5, 2 15 1 Poor Low Moderate CDB, D, LC, SR, LN,
CR
52 Ulmus parvifolia Chinese elm 9.0 1, 1, 1, 1, 1, 1,
3 15 3 Poor High Moderate SD, CR, under crown
of tree 48
53 Sequoia
sempervirens coast redwood 4.0 15 2 Moderate Low Moderate S, ST
54 Sequoia
sempervirens coast redwood 32.0 25 3 Moderate Moderate Moderate S, ST
55 Quercus agrifolia coast live oak 10.0 20 X 3 Moderate Moderate Moderate LN, CR, sooty black
mold, hedged
56 Sequoia
sempervirens coast redwood 49.5 21.5, 28 20 2 Poor Low High S, CDB, ST
57 Cupaniopsis
anacardioides carrot wood 15.0 20 1 Poor Low Moderate SD, D, H, LN
58 Ficus microcarpa Indian laurel fig 24.0 40 3 Moderate Moderate Moderate SR, SL CR, LN,
sidewalk damage
59 Ficus microcarpa Indian laurel fig 27.0 45 3 Moderate Moderate Moderate SR, SL CR, sidewalk
damage
60 Sequoia
sempervirens coast redwood 42.0 40 2 Poor Low High SR, SL ST Arborist Report - 1422 Monterey StreetJune 18, 202113
1672543128911105455561514131617181920212231322423252733283029343536426043444551464948505153585957413738403926Exhibit AMONTEREY STEXISTING TREEDRIPLINE, TYPICAL.EXISTING TREE,TYPICALSCALE: 1" = 50'Tree Location MapTREE TAGNUMBER, TYPICALCALIFORNIA BLVD PALM STUPRR R.O.W.(E) BLDG.(E) BLDG.(E) BLDG.(E) PRKG. LOT(E) PRKG. LOT(E) PRKG. LOTPROPERTY LINE,TYPICAL(E) PRKG. LOT(E) VACANT. LOTEXISTING TREEAPPROXIMATELOCATION, TYPICALArborist Report - 1422 Monterey StreetJune 18, 202114
Exhibit B - Tree Photographs
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Arborist Report - 1422 Monterey Street
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14
13
13 14
Structural defects
of unknown origin
Deep pocket
of decay in 1 of
several stems
Incorrect
installation of root
barrier
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20
Evidence of decades old
construction impacts.
Approximately 2’ of fill in the
critical root zone and railroad
ties pressed up against the
root collar restricting growth of
of tree 20.
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41
Deep pocket of
vertical decay in
1 of 3 stems
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Arborist Report - 1422 Monterey Street
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Terms and Conditions
The following terms and conditions apply to all oral and written reports and correspondence
pertaining to consultations, inspections, and activities of RRM Design Group.
1. The scope of any report or other correspondence is limited to the trees and conditions
specifically mentioned in those reports and correspondence. RRM Design Group assumes
no liability for the failure of trees or parts of trees, either inspected or otherwise. RRM
Design Group assumes no responsibility to report on the condition of any tree or landscape
feature not specifically requested by the named client.
2. No tree described in this report was climbed, unless otherwise stated. RRM Design Group
does not take responsibility for any defects, which could have only been discovered by
climbing. A full root collar inspection, consisting of excavating the soil around the tree to
uncover the root collar and major buttress roots was not performed unless otherwise
stated. RRM Design Group does not take responsibility for any root defects, which could
only have been discovered by such an inspection.
3. RRM Design Group shall not be required to provide further documentation, give testimony,
be deposed, or attend court by reason of this appraisal or report unless subsequent
contractual arrangements are made, including payment of additional fees for such
services as described by RRM Design Group or in the schedule of fees or contract.
4. RRM Design Group guarantees no warrantee, either expressed or implied, as to the
suitability of the information contained in the reports for any reason. It is the responsibility
of the client to determine applicability to his/her case.
5. Any report and the values, observations and recommendations expressed therein
represent the professional opinion of RRM Design Group, and the fee for services is in no
manner contingent upon the reporting of a specified value nor upon any finding to be
reported.
6. Any photographs, diagrams, graphs, sketches, or other graphic material included in any
report, being intended solely as visual aids, are not necessarily to scale and should not be
construed as engineering reports or surveys, unless otherwise noted in the report. Any
reproductions of graphic material or the work produced by other persons, is intended
solely for the purpose of clarification and ease of reference. Inclusion of said information
does not constitute a representation by RRM Design Group as to the sufficiency or
accuracy of that information.
7. 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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