YWCA Kimpton Hotel Project Final EIR
Appendix E
Protected Tree Report Pasadena YWCA
Redevelopment
Appendix E • Protected Tree Report Pasadena YWCA Redevelopment
YWCA Kimpton Hotel Project Final EIR
D E C E M B E R 3 1 , 2 0 1 4 626.428.5072
P R O T E C T E D T R E E R E P O R T
P A S A D E N A Y W C A R E D E V E L O P M E N T
K H P I I I P A S A D E N A , L L C
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S U B M I T T E D T O :
B A R B A R A G R E E N
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I S A Q U A L I F I E D T R E E R I S K A S S E S S O R
S C O T T M C A L L A S T E R
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P R O T E C T E D T R E E R E P O R T – Y W C A S I T E – 7 8 N O R T H M A R E N G O A V E N U E , P A S A D E N A
TABLE OF CONTENTS
EXECUTIVE SUMMARY ......................................................................................................................... 1 BACKGROUND AND ASSIGNMENT ..................................................................................................... 1 OBSERVATIONS .................................................................................................................................... 2 TABLE 1 – SUMMARY OF INVENTORIED TREES ................................................................................ 2
DISCUSSION .......................................................................................................................................... 5
CONCLUSION AND RECOMMENDATIONS .......................................................................................... 7 EXHIBIT 1 – AERIAL VIEW OF SUBJECT PROPERTY ......................................................................... 9
EXHIBIT 2 – REDUCED COPY OF THE PROTECTED TREE LOCATION MAP ................................... 10
EXHIBIT 3 – REDUCED COPY OF THE PROTECTED TREE IMPACT MAP & FENCING PLAN ......... 11 CAPTIONED PHOTOGRAPHS ............................................................................................................. 12 RESUME ............................................................................................................................................... 28 COVER PAGES FOR MAP POCKETS - 2 FULL SIZE MAPS ............................................................... 29
December 31, 2014
Barbara Green
Manager, Development & Construction
Kimpton Hotels & Restaurants
222 Kearny Street, Suite 200
San Francisco, California 94108
Re: YWCA Site – Kimpton Hotel, 78 North Marengo Avenue, Pasadena, California Protected Tree Report
Dear Ms. Green,
EXECUTIVE SUMMARY
This report addresses 61 total trees on, or immediately adjacent to, the existing Pasadena YWCA located at
78 North Marengo Avenue in Pasadena, California. Twenty-six of the trees are located on private property and
35 trees are in the public rights-of-way that surround the property. Proposed project development will require
removal of 34 trees; all of the 26 private trees and eight public trees. Twenty-seven public trees of various
species are proposed to remain in the adjacent rights-of-way with no impact. We understand that a landscape
plan will be prepared by the project landscape architect that includes replacement trees on-site and possibly in
the public rights-of-way.
BACKGROUND AND ASSIGNMENT
Kimpton Hotels & Restaurants (Kimpton) is proposing to demolish the currently vacant YWCA building and
construct a new hotel, outdoor spaces, and associated infrastructure on the property. Development will occur
on several private parcels and one City of Pasadena-owned parcel.
This report is based on our site visit of December 15, 2014 and our review
of the architectural site plans provided by Architectural Resources Group,
Inc. No grading or landscape plans were available at the time of this
report. Tree trunk locations, ‘Root Protection Zones1’, and proposed tree
protection fencing are illustrated on the enclosed Tree Impact and
Protection Plan. Photographs accompanying this report illustrate site
context, branch architecture, and vigor for the protected trees.
1 The Root Protection Zone is defined as the area within a circle with a radius equal to the
greatest distance from the trunk to any overhanging foliage in the canopy.
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OBSERVATIONS
Assessment of the YWCA property and the surrounding public rights-of-way resulted in an inventory of 61 total
trees2. Twenty-six trees of various species were found on the private property lots and 35 trees of various
species were recorded in the public rights-of-way and on one adjacent lot owned by the City of Pasadena. The
YWCA is located immediately west of Pasadena City Hall and the Jackie Robinson Memorial. A number of
trees are located in the Robinson memorial area, the adjacent lawn, and in the parkway along Garfield Avenue.
Additional street trees are located along Marengo Avenue to the west and Holly Street to the north. No street
trees exist along Union Street to the south. Table 1 provides a summary of the inventoried trees.
TABLE 1 – SUMMARY OF INVENTORIED TREES
Tree #
Common Name
Scientific Name
Physiological and Structural
Condition (A-F)
Disposition (Retain,
Remove, Relocate)
Jurisdiction (Public or Private)
Protected Tree - Y/N
Comments
A Carrotwood Cupaniopsis
anacardioides B Remove Public Y
B Carrotwood Cupaniopsis
anacardioides B Remove Public Y
C Carrotwood Cupaniopsis
anacardioides B Remove Public Y
D Canary Island
date palm Phoenix canariensis A- Retain Public Y
E Engelmann
oak Quercus
engelmannii B- Retain Public Y Root ball is loose
F Engelmann
oak Quercus
engelmannii A Retain Public Y
G Engelmann
oak Quercus
engelmannii A Retain Public Y
H Engelmann
oak Quercus
engelmannii B Retain Public Y
I Engelmann
oak Quercus
engelmannii A Retain Public Y
J Engelmann
oak Quercus
engelmannii B Retain Public Y
K Engelmann
oak Quercus
engelmannii A Retain Public Y
L Engelmann
oak Quercus
engelmannii A Retain Public Y
M Engelmann
oak Quercus
engelmannii A Retain Public Y
N Engelmann
oak Quercus
engelmannii A Retain Public Y
O Engelmann
oak Quercus
engelmannii A Retain Public Y
2 Two trees, previously numbered 16 and B1 on an inventory from 2013, have been removed.
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Tree #
Common Name
Scientific Name
Physiological and Structural
Condition (A-F)
Disposition (Retain,
Remove, Relocate)
Jurisdiction (Public or Private)
Protected Tree - Y/N
Comments
P Engelmann
oak Quercus
engelmannii A Retain Public Y
Q Engelmann
oak Quercus
engelmannii A Retain Public Y
R Engelmann
oak Quercus
engelmannii A Retain Public Y
S Engelmann
oak Quercus
engelmannii C Retain Public Y
Buried root collar; sparse canopy
T Engelmann
oak Quercus
engelmannii B+ Retain Public Y Root issues (moderate)
U Engelmann
oak Quercus
engelmannii A- Retain Public Y Root issues (moderate)
V Engelmann
oak Quercus
engelmannii A- Retain Public Y Root issues (moderate)
W Southern magnolia
Magnolia grandiflora
C- Retain Public Y Sparse canopy
X Southern magnolia
Magnolia grandiflora
B- Retain Public Y Chlorotic; pruned; history
of breakage
Y Japanese
pagoda tree Sophora japonica B+ Remove Public Y
History of breakage; multiple branch
attachments
Z Fremont
cottonwood Populus fremontii B Remove Public Y Overextended to east
A1 Floss silk Ceiba speciosa B Remove Public Y History of breakage; root
decay (surface)
B1 Japanese
maple Acer palmatum Tree has been removed
C1 Red alder Alnus rubra A Remove Public Y
D1 Mugo pine Pinus mugo B+ Remove Public Y
E1 Peach Prunus sp. A Retain Public Y
F1 Peach Prunus sp. A Retain Public Y
G1 Peach Prunus sp. A Retain Public Y
H1 Redwood Sequoia
sempervirens B Retain Public Y Basal decay on east side
I1 Peach Prunus sp. B Retain Public Y leaning
J1 Peach Prunus sp. A Retain Public Y
1 Eugenia Syzygium
paniculatum B+ Remove Private Y
2 Victorian box Pittosporum undulatum
C Remove Private N
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Tree #
Common Name
Scientific Name
Physiological and Structural
Condition (A-F)
Disposition (Retain,
Remove, Relocate)
Jurisdiction (Public or Private)
Protected Tree - Y/N
Comments
3 Strawberry
tree Arbutus unedo B Remove Private Y Dieback at top
4 Diamond leaf Pittosporum
Auranticarpa rhombifolia
B Remove Private N
5 Strawberry
tree Arbutus unedo B Remove Private N
History of breakage; asymmetrical
6 California bay
laurel Umbellularia
californica B Remove Private Y
7 Red ironbark Eucalyptus sideroxylon
B Remove Private Y Cavity at base
8 Strawberry
tree Arbutus unedo C- Remove Private N Crack in trunks
9 Strawberry
tree Arbutus unedo A Remove Private Y
10 Strawberry
tree Arbutus unedo D Remove Private N Crack in trunks
11 Floss silk Ceiba speciosa A Remove Private Y
12 Peach Prunus sp. A Remove Private N
13 Red ironbark Eucalyptus sideroxylon
A Remove Private Y
14 Red ironbark Eucalyptus sideroxylon
B Remove Private Y History of breakage
15 Southern magnolia
Magnolia grandiflora
B- Remove Private N Minor deadwood
16 Victorian box Pittosporum undulatum
Tree has been removed
17 Yew pine Afrocarpus falcatus A Remove Private N
18 Yew pine Afrocarpus falcatus A Remove Private N
19 Yew pine Afrocarpus falcatus A Remove Private N
20 Yew pine Afrocarpus falcatus A Remove Private N
21 Yew pine Afrocarpus falcatus A Remove Private N Topped
22 Victorian box Pittosporum undulatum
D Remove Private N Irreversible decline and
decay
23 Victorian box Pittosporum undulatum
D- Remove Private N Irreversible decline and
decay
24 Victorian box Pittosporum undulatum
D Remove Private Y Irreversible decline and
decay
25 Victorian box Pittosporum undulatum
D Remove Private Y Irreversible decline and
decay
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Tree #
Common Name
Scientific Name
Physiological and Structural
Condition (A-F)
Disposition (Retain,
Remove, Relocate)
Jurisdiction (Public or Private)
Protected Tree - Y/N
Comments
26 Camellia Camellia japonica B Remove Private N Minor dieback
27 Camellia Camellia japonica B Remove Private N
DISCUSSION
Implementation of the project will result in removal of 10 protected and 16 non-protected private property
trees and eight protected public trees of various species. All of the removals are proposed due to the
demolition of the YWCA structures and the grading and construction of the new Kimpton hotel.
Construction on Marengo Avenue and realignment of the sidewalk is proposed to allow for a valet
service/loading zone in front of the hotel.
There are several potential consequences related to residential construction that may affect trees during
and after a typical construction process. They are as follows:
EXCAVATION - ROOT SEVERANCE
SOIL COMPACTION (DURING AND POST-CONSTRUCTION)
ALTERATION OF THE WATER TABLE/SITE DRAINAGE
CHANGES IN GRADE
SUBSTANTIAL TRIMMING OF CANOPY OR ROOTS
MECHANICAL DAMAGE
IRRIGATION
A. EXCAVATION – ROOT SEVERANCE
Trenching can include excavation for foundations and trenching for irrigation, utility, or drainage lines.
Hand trenching should be done close to the trunk to expose the location of significant roots - those two
inches in diameter or greater.
When root cutting is permitted, exposed major roots should not be ripped by construction equipment.
Instead, they should be cut cleanly behind torn ends, if possible back to a lateral branching root.
When trenching pathways are in the Root Protection Zone of trees, tunneling and bridging should be
used to preserve roots two inches in diameter or greater. Wherever possible underground lines should
occupy common trenches.
Absorbent tarp or heavy cloth fabric should cover new grade cuts and be overlain by compost or
woodchip mulch.
Where necessary, hand-held equipment should be used for excavation within the Root Protection
Zone of the protected trees to remain in order to avoid shattering and tearing roots.
When root cutting is permitted, exposed major roots should not be ripped by construction
equipment. Instead, they should be cut cleanly at a 90° angle to the root, and if possible back to a
lateral branching root.
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B. SOIL COMPACTION
Soil compaction is a complex set of physical, chemical, and biological constraints on tree growth.
Principal components leading to limited growth are the loss of aeration and pore space, poor gas
exchange with the atmosphere, lack of available water, and mechanical impedance of root growth.
Soil compaction is considered to be the largest single factor responsible for the decline of trees on
construction sites.
C. ALTERATION OF THE WATER TABLE/SITE DRAINAGE
The water table is the upper surface of the zone in which soil macropores are saturated with water;
water tables may vary seasonally. Rather than a flat, static surface, the water moves down a gradient.
Its depth varies, depending on the structure of the soil and rocks through which it flows. A perched
water table may form in soils that have impermeable strata. Swamps are created where the water table
intersects level ground.
Structures such as footings, basements, subterranean buildings, and retaining walls may intercept
impermeable layers in the soil on which water perches. If adequate drainage is not provided, the water
table uphill may gradually rise and interfere with tree roots. This type of damage usually takes a period
of time to be recognized and diagnosed.3
Many trees are susceptible to root infections, such as Armillaria and Phytophthora. Both of these
fungal diseases can progressively weaken a root system, resulting in dead branches in the canopy of
the tree, loss of stability of the entire tree because of decaying roots, and premature death of the tree.
Trees form roots in accordance with existing soil composition and water availability. Minor drainage
changes in the winter and spring months are insignificant to the health of the trees.
All Protected Trees to Remain:
Based on the topography of the project site, drainage conditions are not anticipated to become an issue
during and subsequent to construction.
D. CHANGES IN GRADE
Changes in grade, by the addition or removal of soil (filling or cutting), can be injurious. Lowering the grade
around trees can have immediate and long-term effects on trees. Typically, the vast majority of the root
mass exists within the top 3 feet of soil, and most of the fine roots active in water and nutrient absorption
are in the top 12 inches. The arborist of record should approve any grade changes exceeding +/- four
inches.
E. SUBSTANTIAL PRUNING OF CANOPY OR ROOTS
All Protected Trees to Remain:
If any minor roots are encountered (less than 2 inches in diameter), they should be cut cleanly at a 90-
degree angle and covered immediately with soil to prevent unnecessary drying. Roots over 2-inches in
diameter should be bridged or tunneled-under, wherever possible.
3 Nelda Matheny and James R. Clark, Trees and Development: A Technical Guide to Preservation of Trees During Land Development, (Champaign, Illinois: International Society of Arboriculture, 1998), pp. 88-89.
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F. PROTECTION AGAINST MECHANICAL DAMAGE - FENCING
Fencing is usually used as a temporary enclosure erected around a tree to enclose as much of its
protected zone as possible. Fences are critical to (1) prevent direct contact and damage to the canopy,
branches, and trunk, (2) preserve roots and soil in an intact and non-compacted state, and (3) identify
the Root Protection Zone. Fencing generally comprises five-foot high chain link fencing, secured by 2-
inch diameter galvanized posts driven into the ground at appropriate spacing. Fencing usually must be
in place before demolition or the initiation of construction. If surrounded entirely, a gate should be
installed to allow access to the trees.
All Protected Trees to Remain:
Tree Protection Fencing should be erected prior to the commencement of the project as outlined on the
Tree Impact and Protection Plan and as described below in ‘Conclusions and Recommendations.’
G. IRRIGATION
Trees that have suffered root loss may not be able to exploit as large a soil volume as before injury. In
either case, trees may benefit from supplemental irrigation. The following are general guidelines:
The amount of water applied must be appropriate to the species.
Light, infrequent irrigations should be avoided.
Excess irrigation from incompatible landscaping should be avoided. Runoff from neighboring
plantings should be minimized and/or directed away from trees.
Wetting the trunk should be avoided.
New irrigation and landscaping is proposed as part of this project. If drought conditions persist, trees to
remain should be watered approximately once a month according to the guidelines set forth in the
‘Conclusion and Recommendations’ section.
CONCLUSION AND RECOMMENDATIONS
In my professional opinion, the project may proceed if the following conditions are met:
Any demolition, digging, excavating, or trenching within the Root Protection Zone of any protected
tree to remain is monitored by a qualified arborist.
Exposed roots to remain and should be covered with burlap, carpet remnants or other material that
may be kept moist until soil can be replaced.
If drought conditions persist, and if irrigation is turned off for construction, on-site trees to remain
should be deeply-watered with soaker hoses laid in concentric circles under their drip line (with
percolation to a depth of at least 24”) at least twice in one – two week intervals prior to grading or
demolition activities. Additional irrigation may be required to optimize tree health during
construction. The monitoring arborist will make these recommendations.
This report is part of the set of plans given to the contractor. The contractor should be familiar with
the specific instructions and responsibilities pertaining to protected trees. It is recommended that a
professional arborist be retained and meet with the contractor and his personnel prior to
commencement of the project.
If canopy pruning is found to be necessary for trees to remain, it should only be performed by a
qualified ISA Certified Arborist or ISA Certified Tree Worker. Public trees must be pruned by City of
Pasadena staff.
Protected trees shall not be removed until approval is granted by the City of Pasadena.
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Construction monitoring reports should be submitted to the City of Pasadena at appropriate intervals to
be determined by that same agency.
Equipment, materials, and vehicles shall not be stored, parked, or operated within the protected zone of
trees to remain.
Equipment with overhead exhaust shall not be placed in such a manner as to scorch overhanging
branches or foliage. Smaller equipment shall be used in such areas as deemed necessary by the
monitoring arborist.
A ‘Warning’ sign is prominently displayed on each protective enclosure. The sign will be a minimum of
8.5 inches x 11 inches and clearly state the following:
Tree removal application forms for both the protected private and public trees are electronically enclosed
with this report (via email). Additionally, the Tree Inventory within the Master Application has been
completed and is enclosed with this report. Please feel welcome to contact me at our Sierra Madre office
(626.428.5072) if you have any immediate questions or concerns. Thank you.
Respectfully submitted,
Christy Cuba, Registered Consulting Arborist [email protected]
TREE PROTECTION ZONE THIS FENCE SHALL NOT BE REMOVED
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EXHIBIT 1 - AERIAL VIEW OF THE SUBJECT PROPERTY
SUBJECT PROPERTY
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EXHIBIT 2 – REDUCED COPY OF THE
TREE LOCATION MAP
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EXHIBIT 3 – REDUCED COPY OF THE TREE IMPACT & PROTECTION PLAN
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SITE PHOTOS
Overview – facing northwest
Overview - facing west
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#1 Eugenia #2 Victorian box
#3 Strawberry tree
#4 Diamond-leaf pittosporum
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#7 Red ironbark Strawberry tree
#6 California bay laurel
#8
#9
#5 Strawberry tree
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#11 Floss silk
#13 Red ironbark
#10 Strawberry tree
#12 Peach tree
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#15 Southern magnolia
Yew pine
#17
#14 Red ironbark
Yew pine
#18
#19 #20 #21
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Victorian box
#26 Camellia
#23 #22
#24 Victorian box
#25 Victorian box
#27 Camellia
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A: Carrotwood
Public Right-of-Way Trees
B: Carrotwood
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D: Canary Island date palm
E: Engelmann oak
C: Carrotwood
F: Engelmann oak
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J: Engelmann oak I: Engelmann oak
H: Engelmann oak G: Engelmann oak
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N: Engelmann oak M: Engelmann oak
L: Engelmann oak K: Engelmann oak
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R: Engelmann oak Q: Engelmann oak
P: Engelmann oak O: Engelmann oak
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V: Engelmann oak U: Engelmann oak
T: Engelmann oak S: Engelmann oak
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W: Southern magnolia X: Southern magnolia
Y: Japanese pagoda tree Z: Fremont cottonwood
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E1: Peach tree
A1: Floss silk tree C1: Red alder
D1: Mugo pine
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F1: Peach tree
H1: Redwood
G1: Peach tree
I1: Peach tree
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J1: Peach tree
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CHRISTINE CUBA
CARLBERG ASSOCIATES Satellite Office – 80 W. Sierra Madre Blvd., #241 • Sierra Madre • California • 91024
2402 California Avenue • Santa Monica • California • 90403 [email protected] • 626.428.5072
Education B.A., Environmental Analysis & Design, University of California, Irvine, 1993 Graduate, International Society of Arboriculture Certification Study Program, April 1998 Graduate, Consulting Academy, American Society of Consulting Arborists, February 2008
Experience Director of Environmental Services & Senior Arborist, Land Design Consultants, Inc. Pasadena, 1994 – 2011
Park Specialist/Naturalist, City of Monrovia, 1988-1996
Certificates Certified Arborist, WE-1982A, International Society of Arboriculture
Registered Consulting Arborist, #502, American Society of Consulting Arborists Qualified Tree Risk Assessor, International Society of Arboriculture
AREAS OF EXPERTISE Ms. Cuba is experienced in the following areas of tree management and preservation:
Tree health & risk assessments
Inventories & reports for native and non-native trees
Master planning
Evaluation of trees for preservation, encroachment, relocation, restoration, and hazards
Value assessments (appraisals) for native and non-native trees
Post-fire inventories, assessments, and valuations for native and non-native trees
Guidelines for tree preservation, planting, pruning and maintenance specifications
Pest and disease identification
Tree and landscape resource mapping – GPS, GIS, and AutoCAD
Planning Commission, City Council, and community meetings representation
Review of landscape plans for mitigation compliance & fire fuel modification planning
Preparation of native habitat and woodland management plans
Performance of long-term mitigation compliance monitoring & reporting
Expert testimony
PREVIOUS CONSULTING EXPERIENCE
Ms. Cuba has performed hundreds of tree inventories, health evaluations, impact analyses, hazard, and value assessments for c ounties, cities, sanitation districts, and water districts, as well as private developers, architects, engineers, and homeowners. She has over 23 of
experience in arboriculture and is trained in environmental planning, state and federal regulatory permitting, preparation of CEQA analyses, and habitat mitigation planning and implementation. Representative clients include:
City of Pasadena San Diego Gas & Electric City of Monrovia Quinn, Emanuel, Urquhart and Sullivan (attorneys at law) City of Santa Clarita Figure 8 Group
City of Glendora City of South Gate Los Angeles County Fire Department City of Sierra Madre Los Angeles County Sanitation Districts D2 Development
Newhall County Water District Burrtec, Inc. Pulte/Centex Homes City of West Hollywood Newhall Land and Farming Corky McMillin Companies
AFFILIATIONS
Ms. Cuba serves with the following national and regional professional organizations:
Member, American Society of Consulting Arborists
Member, International Society of Arboriculture, Western Chapter
Member, ASCA Education Task Force
Member, Los Angeles Oak Woodland Habitat Conservation Strategic Alliance
President, Street Tree Seminar, Inc.
D E C E M B E R 3 1 , 2 0 1 4 / Y W C A S I T E – K I M P T O N H O T E L
P A G E 29 7 8 N O R T H M A R E N G O A V E N U E , P A S A D E N A
Map Pockets for Full-size
Protected Tree Location Map
and
Protected Tree Impact Map
D E C E M B E R 3 1 , 2 0 1 4 / Y W C A S I T E – K I M P T O N H O T E L
P A G E 30 7 8 N O R T H M A R E N G O A V E N U E , P A S A D E N A
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