POST OFFICE BOX 1150 • GLEN ELLEN, CA 95442 • PHONE: 707.938.1822 August 22, 2024
Judy Stout
Integrity DCS
2 South Pointe Dr. Ste 140
Lake Forest, CA 92630
RE:
Magnussen's Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
Dear Ms. Stout,
This report was prepared at the request of Integrity Design and Construction Services, project managers for the proposed Magnussen Toyota Auto Dealership located at the southeast corner of Old Middlefield Way and Independence Avenue in Mountain View, CA. This report provides an update to the initial October 12, 2023, arborist report and reflects the most recent Planning 5 Project Submittal.
The purpose of this evaluation is to:
§ Update the health and structural condition of trees growing within and near the project limits.
§ Provide an assessment of the probable construction impact of the evaluated trees and provide tree protection specifications for the trees designated as preserved. § Calculate the mitigation requirements described in the City of Mountain View Tree Technical Manual and Ordinance No. 01.03 Section 1 Chapter 32, Article II Protection of the Urban Forest.
Sit
e and Tree Summary Discussion:
The project site consists of three parcels. Parcel 1 is located in the east section of the site with two existing commercial buildings (one vacant) and associated parking lots. Parcels 2 and 3 are on the west side and are paved parking lots, currently unused and fenced.
A total of 116 trees were inventoried and evaluated. The species occurring on the site consist of five (5) Bradford pear (Pyrus calleryana 'Bradford'), 99 coast redwoods (Sequoia sempervirens), two (2) crape myrtles (Lagerstroemia indica x fauriei), five (5) liquidambars (Liquidambar styraciflua), one (1) white lead tree (Leucaena sp.), one (1) Peruvian pepper (Schinus molle), and three (3) tree-of-heaven (Ailanthus altissima) (three original trees plus root sprouts) All the trees Attachment 9
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
originate as landscape plantings, although the tree-of-heavens are likely volunteers as the species is highly invasive.
The condition of the trees is variable, with three of the redwoods dead, four in poor health, and the balance in fair to moderate condition. The other species are generally in fair to moderate condition, with two liquidambar exceptions in poor condition. The two clusters of tree-of-heaven located on the property line and adjacent to two residential properties are dense, multi-stem clonal thickets with canopies extending over the property line by 30 feet and likely spreading into the neighboring property.
A unique aspect of the landscape plantings is the planting of 79 coast redwoods as a hedge bordering the Parcel 1 interior parking lot. The trees have been topped at 12 feet and were planted on five-foot centers. With the high water and frequent pruning requirements, the hedge is inefficient and a questionable screening strategy.
The Bradford pears, four liquidambars, and the two crape myrtles are designated street trees.
Two of the Bradford pears, the Peruvian pepper, the two tree-of-heavens, and the coast redwoods, including the hedge and dead trees, qualify as heritage-status trees. The white lead tree on an adjacent residential property could be of heritage status size. Eight street trees have trunk circumferences less than the heritage status threshold.
The report includes images of the trees. Attached are the Tree Evaluation Data Matrix (Appendix A), Tree Protection Requirements Matrix (Appendix B), Tree Protection Specifications (Appendix C), and an Existing Tree Exhibit.
Construction Impact:
Construction impacts include grading cuts near property line trees, the construction of property line masonry walls, new sidewalk locations, bio-retention zones, and new building construction.
The specific impacts for each tree are listed in Appendix A- Tree Inventory and Evaluation Data Matrix. A single white lead tree on an adjacent residential property (tree #33) may be impacted due to the masonry wall construction and grading at the property line.
Tree Removal Mitigation:
The Tree Evaluation Data Matrix (Appendix A) shows the tree mitigation quantities based on the expected construction impacts. The City of Mountain View requires two 24-inch box trees as mitigation for each heritage status tree removed. The number of mitigation trees required for the trees removed for construction is 160 24-inch box trees. If there is insufficient landscape area to install the total number, then in lieu fees are assessed at $750.00 for each 24-inch boxed tree.
The current landscape plan specified 41 24-inch box trees for new planting. The total number of trees required for mitigation is calculated at 119 (160-41). The in-lieu fees are $750.00 per tree, or $89,250.00.
Individual Tree Evaluations
Following is a description of the various data used in the evaluations.
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
Tree #:
The trees are assigned a number as indicated on the Tree Location and Numbering Plan.
Common and Botanical Name (Species):
The botanical name and common name are provided for each tree.
Trunk Diameter (with Circumference) and # of Trunks:
Trunk diameter refers to measuring the trunk diameter at 54 inches above grade. The # of trunks notes single or multiple-trunk trees. Trunks must occur at or below 54 inches above grade for a tree to be considered to have multiple trunks for measurement purposes. Trunk measurements may differ from those shown on the plans due to the method and date of measurement. Also provided are the trunk circumferences, which are the measurements used in the Mountain View tree ordinance.
Height and Crown Diameters:
These fields are approximate measurements of the tree's height and crown spread. Accuracy is within plus or minus 10% of the indicated estimate.
Health and Structural Ratings and Descriptions:
The following chart describes the health and structural rating system used in the evaluation.
It is a rating of relative conditions such as vigor, the extent of decay, structure, and insect or disease problems. Good and moderate ratings indicate limited structural problems, sufficient vigor, and no significant pest or disease problems. Poor and marginal ratings indicate serious health or structural problems, especially if the tree is near structures or public areas. Trees rated as poor or marginal are often hazardous.
Rating Chart:
3.0 Moderate (or
better) condition
Normal and correctable problems of structure or pests and diseases.
2.5 Fair condition Typically, it indicates moderately low vigor and foliage density with limited branch or twig dieback. Significant but correctable structural defects may be present.
2.0 Marginal
condition
Indicates serious problems with health, structure, decay, or significant insect or disease problems.
1.0 Poor condition Indicates very poor health, vigor, and/or hazardous structural condition.
Trees may be rated between two conditions, such as 2.5 or 3.5, which indicates the tree does not precisely meet the criteria for either of the two categories and allows the rating system to be used as a continuum.
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
The comments and observations describe the basis for the health and structural ratings. If possible, the specific pests, diseases, and structural defects observed are described and identified.
This evaluation is of the above-ground structure only, and additional defects may exist at the root collar. Often, larger mature and over-mature trees require a root collar examination to evaluate the primary structural roots and root collar for decay and disease. In addition, an aerial inspection of the limb structure may be required.
Comments/Observations:
This is a summary discussion of the health and structural ratings and identification of any significant pest or disease issues or structural defects.
Suitability for Preservation Ratings:
Rating Factors:
Tree Health: Vigorous and healthy trees are better able to tolerate construction impacts, including root loss or injury,
Structural Condition: Preserved trees should be structurally sound or have defects that can be effectively abated in areas near structures or high-use areas.
Tree Age and Species: Older trees may have a reduced ability to tolerate construction impacts and adapt to changed site conditions. Additionally, individual tree species have varying tolerances to environmental impacts and changes.
Rating Scale:
Good: Trees in good health and structural condition with high potential for longevity.
Moderate: Trees in fair health and/or with structural defects that can be abated with treatment.
Fair: Trees in marginal health or structural condition that could be mitigated or improved.
Poor: Trees in poor health and/or structural condition that probably cannot be effectively abated.
Heritage Tree Status:
Status of the tree according to the City of Mountain View Tree Ordinance.
Construction Impact Assessment/Impact Code:
An assessment of the potential impact based on the tree location relative to grading limits and construction activity type. The impact code is a designation for sorting and filtering the Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
construction impact data.
Please contact me if additional information is required.
Sincerely,
ISA Certified Arborist WE-0603A
ISA Tree Risk Assessment Qualified
ASCA Tree and Plant Appraisal Qualified
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
Tree Images:
Bradford pear street trees growing along Independence Avenue.
Closely spaced limbs are characteristic of Bradford pears and are prone to failure.
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
The asymmetrical root system of a Bradford pear. This defect does not appear to be affecting the health or stability of these trees.
One of the four liquidambar street trees on Old Middlefield Way. The trees are in variable condition.
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
The surface rooting typical of liquidambars often causes pavement displacement.
Peruvian pepper, tree #9., and coast redwoods #10 and #11.
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
Liquidambars #13 and #14.
Redwoods #15, #16, and #17.
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
Redwoods, #21, #22, #22A, and #23.
Redwoods along the south perimeter. Trees #23,#24, #25, and #26.
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
Redwoods and tree-of-heaven are growing on the adjacent property in the south portion of the project site. Trees #28- # 32.
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
Tree-of-heaven cluster on adjacent property. (#32)
A white lead tree is growing on the adjacent property. (Tree #33)
Magnussen’s Toyota Auto Dealership Mountain View- Arborist Report and Tree Protection Specifications
8/22/24
MacNair and Associates
Crape myrtle street trees. (Trees #34 and #35)
A hedge of redwoods borders the parking lot.
Appendix A
Individual Tree Data Matrix and
Construction Impact Assessment
Magnussen's Toyota of Mountain View
Tree Inventory and Construction Impact Data Matrix
Appendix A
MacNair and Associates Page 1 of 5 8/22/24
Magnussen's Toyota of Mountain View
Tree Inventory and Construction Impact Data Matrix
3.0 = Moderate or
better condition
Construction
Impact Code:
2.5 = Fair SI= Significant potential impact
2.0 = Marginal
condition
1.5 = Poor to marginal
condition
1.0 = Poor condition
Tree # Species # of
Trunks
Equivalent
Trunk Diameter
@ 4.5' (inches)
Equivalent Trunk
Circumference@ 4.5'
(inches)
Trunk #1
(Dia.)
Trunk #2
(Dia.)
Crown
Height
Crown
Diameter
Health
Rating
Structural
Rating Comments/Observations
Suitability for
Preservation
(Based Upon
Condition)
Heritage Tree
Status
Construction Impact
Assessment
Construction
Impact Code
Mitigation
Quantity
1 Bradford pear (Pyrus
calleryana 'Bradford') 1 16.0 50 16.0 25'± 30'± 2.5 2.0 Street tree. Mature tree with closely spaced,
multiple limb attachments forming at 6'.
Moderately low vigor with limited branch
dieback occurring. Good foliage density.
Asymmetrical root distribution.
Fair to Moderate Yes (Street
Tree)
Located in grading
limits. Removal
required.
RC 2
2 Bradford pear 1 12.0 38 12.0 25'± 25'± 3.0 2.0
Street tree. Mature tree with closely spaced,
multiple limb attachments, and co-dominant
trunks forming at 9'. Moderate vigor and
foliage density. Asymmetrical root
distribution. One branch failure.
Fair to Moderate No (Street
Tree)
4' from sidewalk.
11' from parking
area. Potential for
impact due to
asymmetrical and
surface roots.
MI 0
3 Bradford pear 1 15.5 49 15.5 25'± 25'± 2.5 2.0
Street tree. Mature tree with closely spaced,
multiple limb attachments, and extended
limbs. Moderately low vigor with limited
branch dieback. Large diameter surface
roots.
Fair to Moderate Yes (Street
Tree)
4' from sidewalk.
11' from parking
area. Potential for
impact due to
surface roots.
MI 0
4 Bradford pear 1 14.5 46 14.5 25'± 32'± 3.0 2.0
Street tree. Mature tree with closely spaced,
multiple limb attachments, and old trunk
wound. Moderate vigor and foliage density.
Large diameter surface roots.
Fair to Moderate No (Street
Tree)
4' from sidewalk.
11' from parking
area. Potential for
impact due to
surface roots.
MI 0
5 Bradford pear 1 11.5 36 11.5 20'± 25'-30'± 2.5 2.0
Street tree. Lower vigor tree with closely
spaced limb attachments, and old lower
trunk wound. Gall at base of trunk.
Asymmetrical root system.
Fair to Moderate No (Street
Tree)
4' from sidewalk.
11' from parking
area. Potential for
impact due to
asymmetrical and
surface roots.
MI 0
Poor: Trees in poor health and/or structural condition that probably cannot be effectively abated.
RC= Removal due to construction
LI= Limited impact
MI= Moderate impact
NI= No impact
Health and Structural
Rating Key: Good: Trees in good health and structural condition with high potential for longevity.Suitability for Preservation Ratings:
Moderate: Trees in fair health and/or with structural defects that can be abated with treatment.
Fair: Trees in marginal health or structural condition that could possibly be mitigated or improved.
Magnussen's Toyota of Mountain View
Tree Inventory and Construction Impact Data Matrix
Appendix A
MacNair and Associates Page 2 of 5 8/22/24
Tree # Species # of
Trunks
Equivalent
Trunk Diameter
@ 4.5' (inches)
Equivalent Trunk
Circumference@ 4.5'
(inches)
Trunk #1
(Dia.)
Trunk #2
(Dia.)
Crown
Height
Crown
Diameter
Health
Rating
Structural
Rating Comments/Observations
Suitability for
Preservation
(Based Upon
Condition)
Heritage Tree
Status
Construction Impact
Assessment
Construction
Impact Code
Mitigation
Quantity
6 liquidambar
(Liquidambar
styraciflua)
2 8.6 27 5.0 7.0 25'± 20'± 3.0 3.0
Low, two-trunk structure. No significant
structural defects. Moderate vigor and
foliage density. Adjacent electrical box.
Pavement damage.
Moderate No (Street
Tree)
7' from bio-
retention, 5' from
sidewalk, and 10'
from parking area.
Potential for impact
due to surface roots.
MI 0
7 liquidambar 1 5.0 16 5.0 20'± 15'± 3.0 3.0
Young tree with single trunk with no
significant structural defects. Surface roots.
Minor pavement displacement.
Moderate No (Street
Tree)
9' from bio-
retention, 5' from
sidewalk, and 10'
from parking area.
Potential for impact
due to surface roots.
MI 0
8 liquidambar 2 3.0 9 1.5 2.5 10'± 10'± 3.0 1.5 Leaning tree with defective root system.
Located adjacent to the pepper tree. Poor No (Street
Tree)
Located in project
grading limits.
Removal required.
RC 1
9 Peruvian pepper tree
(Schinus molle) 1 27.0 85 27.0 35'-40'± 25'-30'± 3.0 3.0 Mature tree with an extended second trunk.
Lower trunk wounds and galls. Wound on
southwest limb in mid-crown. Vigor and
foliage density are moderate.
Moderate Yes
Located in project
grading limits.
Removal required.
RC 2
10 coast redwood
(Sequoia
sempervirens)
1 16.0 50 16.0 45'-50'± 22'± 3.0 3.0
Semi-mature tree with single trunk structure
and no significant structural defects. Vigor
and foliage density are moderate.
Moderate Yes
Located in project
grading limits.
Removal required.
RC 2
11 coast redwood 2 10.7 26 6.5 8.5 20'± 8'± 1.5 2.0 Low two-trunk twisted structure. Vigor is low with significant branch dieback occurring. Poor Yes
Located in project
grading limits.
Removal required.
RC 2
12 coast redwood 1 23.0 72 23.0 40'-45'± 35'± 2.5 3.0
Mature tree with single trunk structure. No
significant structural issues. Moderately low
vigor. History of drought stress.
Moderate Yes
Variable distance of
16' to 22' from
future driveway and
parking areas
LI 0
13 liquidambar 1 6.0 19 6.0 10'± 8'± 1.0 1.0 Extensive crown dieback. Trunk sunscald damage. Poor No
Located in project
grading limits.
Removal required.
RC 1
14 liquidambar 1 12.5 39 12.5 35'± 30'± 2.0 2.5
Street tree. Closely spaced. Multiple limb
attachments forming at 8'-10'. Wide crown
form. Variable vigor with areas of branch
dieback. Adjacent to electrical lines. History
of pavement damage.
Fair No
Located in project
grading limits.
Removal required.
RC 1
15 coast redwood 1 20.0 63 20.0 65'± 30'± 3.0 3.0
Mature tree with single trunk structure. No
significant structural issues. Moderate vigor
and foliage density. Pavement
displacement occurring.
Moderate Yes
Located in project
grading limits.
Removal required.
RC 2
Magnussen's Toyota of Mountain View
Tree Inventory and Construction Impact Data Matrix
Appendix A
MacNair and Associates Page 3 of 5 8/22/24
Tree # Species # of
Trunks
Equivalent
Trunk Diameter
@ 4.5' (inches)
Equivalent Trunk
Circumference@ 4.5'
(inches)
Trunk #1
(Dia.)
Trunk #2
(Dia.)
Crown
Height
Crown
Diameter
Health
Rating
Structural
Rating Comments/Observations
Suitability for
Preservation
(Based Upon
Condition)
Heritage Tree
Status
Construction Impact
Assessment
Construction
Impact Code
Mitigation
Quantity
16 coast redwood 2 25.5 80 17.0 19.0 65'± 30'± 0.0 0.0 Tree is dead. NA Yes Located in project
grading limits.
Removal required.
RC 2
17 coast redwood 1 23.0 72 23.0 65'± 30'± 2.5 3.0
Mature tree with single trunk structure. No
significant structural issues. Moderately low
vigor and foliage density.
Moderate Yes
Located in project
grading limits.
Removal required.
RC 2
18 coast redwood 1 12.0 38 12.0 40'-45'± 22'± 0.0 0.0 Tree is dead. NA Yes Located in project
grading limits.
Removal required.
RC 2
19 coast redwood 1 16.0 50 16.0 50'± 25'± 1.5 3.0
Semi-mature tree in low vigor with
significant branch dieback. Appears in
decline.
Poor Yes
Located in project
grading limits.
Removal required.
RC 2
20 coast redwood 1 16.0 50 16.0 45'± 25'± 2.5 3.0
Semi-mature tree with single trunk structure
and no significant structural defects. Vigor
and foliage density are moderately low.
History of drought stress.
Moderate Yes
Located in project
grading limits.
Removal required.
RC 2
21 coast redwood 1 20.0 63 20.0 55'-60'± 25'-30'± 1.5 3.0 Semi-mature tree in very low vigor with
significant branch dieback. Appears in
decline.
Poor Yes
Located in project
grading limits.
Removal required.
RC 2
22 coast redwood 1 16.0 50 16.0 45'± 25'± 2.5 3.0
Semi-mature tree with single trunk structure
and no significant structural defects. Vigor
and foliage density are moderately low.
History of drought stress.
Moderate Yes
Located in project
grading limits.
Removal required.
RC 2
22A coast redwood 2 32.0 100 19.0 26 65'± 30'-35'± 3.0 2.5 Mature tree with low, two-trunk structure.
Vigor and foliage density are moderate. No
significant structural defects observed.
Moderate Yes
Located in project
grading limits.
Removal required.
RC 2
23 coast redwood 1 15.0 47 15.0 55'-60'± 25'-30'± 0.0 0.0 Tree is mostly dead. NA Yes Located in project
grading limits.
Removal required.
RC 2
24 coast redwood 1 25.0 79 25.0 60'± 30'± 2.0 3.0
Mature tree with single trunk structure. No
significant structural issues. Vigor and foliage
density are low. History of drought stress.
Poor to Fair Yes
Located in project
grading limits.
Removal required.
RC 2
25 coast redwood 1 20.0 63 20.0 65'± 30'± 3.0 1.5
Semi-mature tree with single trunk structure
and no significant structural defects. Vigor
and foliage density are moderate. Extensive
ivy on trunk. Probable significant damage to
root system from adjacent property
construction.
Poor to Fair Yes
Located 21' to bio-
retention and 24' to
driveway. Masonry
wall required next to
trunk. Potential for
cumulative root
impacts.
MI 0
Magnussen's Toyota of Mountain View
Tree Inventory and Construction Impact Data Matrix
Appendix A
MacNair and Associates Page 4 of 5 8/22/24
Tree # Species # of
Trunks
Equivalent
Trunk Diameter
@ 4.5' (inches)
Equivalent Trunk
Circumference@ 4.5'
(inches)
Trunk #1
(Dia.)
Trunk #2
(Dia.)
Crown
Height
Crown
Diameter
Health
Rating
Structural
Rating Comments/Observations
Suitability for
Preservation
(Based Upon
Condition)
Heritage Tree
Status
Construction Impact
Assessment
Construction
Impact Code
Mitigation
Quantity
26 coast redwood 1 30.0 94 30.0 65'± 30'-35'± 3.0 1.5
Semi-mature tree with single trunk structure
and no significant structural defects. Vigor
and foliage density are moderate. Extensive
ivy on trunk. Probable significant damage to
root system from adjacent property
construction.
Poor to Fair Yes
Located 21' to bio-
retention and 24' to
driveway. Masonry
wall required next to
trunk. Potential for
cumulative root
impacts.
MI 0
27 coast redwood 2 33.5 105 15.0 30 55'-60'± 30'± 2.5 1.5 Mature tree with low, two-trunk structure.
Vigor and foliage density are moderately
low. Probable significant damage to root
system from adjacent property construction.
Poor to Fair Yes
Located in grading
limits including bio
retention area.
RC 2
28 coast redwood 1 24.0 75 24.0 50'± 25'-30'± 3.0 1.5
Mature tree with single trunk structure. No
significant structural issues. Vigor and foliage
density are moderate. Probable significant
damage to root system from adjacent
property construction.
Poor to Fair Yes
Located in grading
limits including bio
retention area.
MI 0
29 coast redwood 1 32.0 100 32.0 60'± 30'± 3.0 3.0
Mature tree with single trunk structure. No
significant structural issues. Vigor and foliage
density are moderate. Located on adjacent
property at fence line. Possible root loss from
adjacent construction on south side.
Moderate Yes
22' to parking area.
Masonry wall
required next to
trunk.
MI 0
30 tree-of-heaven
(Ailanthus altissima) 20± 2"-10" 40'-45'± 30'-35'± 3.0 2.0 Dense cluster of 20 or more stems
surrounding original tree. Appears healthy.
Located on adjacent property at fence line.
Overhangs fence 30'.
Poor (Invasive) Yes
Located in grading
limits with
significant grading
cuts required and
the construction of a
masonry wall.
RC 1
30A tree-of-heaven 15± 2"-10" 40'-45'± 30'-35'± 3.0 2.0 Dense cluster of 10 or more stems.
surrounding original tree. Appears healthy.
Located on adjacent property at fence line.
Overhangs fence 30'.
Poor (Invasive) Yes
Located in grading
limits with
significant grading
cuts required and
the construction of a
masonry wall.
RC 1
31 coast redwood 1 30.0 94 30.0 50'± 30'± 3.0 3.0
Mature tree with single trunk structure. No
significant structural issues. Vigor and foliage
density are moderate. Located on adjacent
property at fence line.
Moderate Yes
16' and 24' to
parking area.
Masonry wall
required next to
trunk.
MI 0
Magnussen's Toyota of Mountain View
Tree Inventory and Construction Impact Data Matrix
Appendix A
MacNair and Associates Page 5 of 5 8/22/24
Tree # Species # of
Trunks
Equivalent
Trunk Diameter
@ 4.5' (inches)
Equivalent Trunk
Circumference@ 4.5'
(inches)
Trunk #1
(Dia.)
Trunk #2
(Dia.)
Crown
Height
Crown
Diameter
Health
Rating
Structural
Rating Comments/Observations
Suitability for
Preservation
(Based Upon
Condition)
Heritage Tree
Status
Construction Impact
Assessment
Construction
Impact Code
Mitigation
Quantity
32 tree-of-heaven 10± 3"-8" 40'± 40'± 3.0 2.0
Dense cluster of 10 or more stems.
surrounding original tree. Appears healthy.
Located on adjacent property at fence line.
Overhangs fence 30'.
Poor (Invasive) Yes
Located in grading
limits with
significant grading
cuts required and
the construction of a
masonry wall.
RC 1
33 white lead tree
(Leucaena sp.) multi Not measured. 25'± 25'± 2.5 n/a
Low, multiple trunk structure. Lower portion
of tree not visible. Vigor appears
moderately low. Overhangs fence 10'.
Moderate Yes
Located on adjacent
property adjacent to
new masonry wall.
Moderate impact
likely.
MI 0
34 crape myrtle
(Lagerstroemia
indica x fauriei)
1 6.5 20 6.5 18'± 14'± 3.0 3.0
Street tree. Semi-mature tree with single
trunk structure and no significant structural
defects. Vigor and foliage density are
moderate.
Moderate to Good No (Street
Tree)
Currently
designated for
transplanting.
MI 0
35 crape myrtle 1 8.0 25 8.0 18'± 14'± 3.0 3.0
Street tree. Semi-mature tree with single
trunk structure and no significant structural
defects. Vigor and foliage density are
moderate.
Moderate to Good No (Street
Tree)
Currently
designated for
transplanting.
MI 0
36 coast redwood 61 4" + 12' 4' 3.0 2.0
Hedge of coast redwood planted 5' o.c.
Topped at approximately 12'. Generally
moderate health. 79 trees along the west
and south sides of the Parcel 1 parking lot.
Fair Yes
Located in project
grading limits.
Removal required.
RC 122
37 coast redwood 18 4" + 12' 4' 3.0 2.0 18 of the hedged redwood are now retained. Fair Yes Now retained. LI 0 83 33
Total Trees: 116
80 3
Sub-Total Mitigation Trees: 160
Less Replacement Trees: 41
Total Mitigation Trees: 119
Total Trees Removed:
Total Trees Retained:
Total Heritage Trees Removed:
Total Non-Heritage Trees Removed:
Appendix B
Individual Tree Protection Requirements
Magnussen's Toyota of Mountain View
Tree Protection Requirements Matrix
Appendix B
MacNair and Associates Page 1 of 5 8/22/24
Magnussen's Toyota of Mountain View
Tree Protection Requirements Matrix
3.0 = Moderate or
better condition
Construction
Impact Code:
2.5 = Fair SI= Significant potential impact
2.0 = Marginal
condition
1.5 = Poor to marginal
condition
1.0 = Poor condition
Tree # Species # of
Trunks
Equivalent
Trunk Diameter
@ 4.5' (inches)
Equivalent Trunk
Circumference@ 4.5'
(inches)
Suitability for
Preservation
(Based Upon
Condition)
Heritage Tree
Status Construction Impact Assessment Construction
Impact Code
Tree
Protection
Zone
(Radius in
Feet)
Critical Root
Zone
(Radius in
Feet)
Specific Tree Protection Requirements
2 Bradford pear 1 12.0 38 Fair to Moderate No (Street
Tree)
4' from sidewalk. 11' from parking
area. Potential for impact due to
asymmetrical and surface roots.
MI 12' 5'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
3 Bradford pear 1 15.5 49 Fair to Moderate Yes (Street
Tree)
4' from sidewalk. 11' from parking
area. Potential for impact due to
surface roots.
MI 15' 5'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
4 Bradford pear 1 14.5 46 Fair to Moderate Yes (Street
Tree)
4' from sidewalk. 11' from parking
area. Potential for impact due to
surface roots.
MI 15' 5'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
RC= Removal due to construction
LI= Limited impact
MI= Moderate impact
NI= No impact
Health and Structural
Rating Key:
Magnussen's Toyota of Mountain View
Tree Protection Requirements Matrix
Appendix B
MacNair and Associates Page 2 of 5 8/22/24
Tree # Species # of
Trunks
Equivalent
Trunk Diameter
@ 4.5' (inches)
Equivalent Trunk
Circumference@ 4.5'
(inches)
Suitability for
Preservation
(Based Upon
Condition)
Heritage Tree
Status Construction Impact Assessment Construction
Impact Code
Tree
Protection
Zone
(Radius in
Feet)
Critical Root
Zone
(Radius in
Feet)
Specific Tree Protection Requirements
5 Bradford pear 1 11.5 36 Fair to Moderate No (Street
Tree)
4' from sidewalk. 11' from parking
area. Potential for impact due to
asymmetrical and surface roots.
MI 12' 5'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
6 liquidambar
(Liquidambar
styraciflua)
2 8.6 27 Moderate No (Street
Tree)
7' from bio-retention, 5' from sidewalk,
and 10' from parking area. Potential for
impact due to surface roots.
MI 10' 5'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
7 liquidambar 1 5.0 16 Moderate No (Street
Tree)
9' from bio-retention, 5' from sidewalk,
and 10' from parking area. Potential for
impact due to surface roots.
MI 8' 5'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
12 coast redwood 1 23.0 72 Moderate Yes Variable distance of 16' to 22' from future driveway and parking areas LI 24' 6'
1. Root pruning trench at edge of parking and driveway limits.
Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning if needed.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
6. Refer to demolition procedures in the General Tree
Protection Specifications.
Magnussen's Toyota of Mountain View
Tree Protection Requirements Matrix
Appendix B
MacNair and Associates Page 3 of 5 8/22/24
Tree # Species # of
Trunks
Equivalent
Trunk Diameter
@ 4.5' (inches)
Equivalent Trunk
Circumference@ 4.5'
(inches)
Suitability for
Preservation
(Based Upon
Condition)
Heritage Tree
Status Construction Impact Assessment Construction
Impact Code
Tree
Protection
Zone
(Radius in
Feet)
Critical Root
Zone
(Radius in
Feet)
Specific Tree Protection Requirements
25 coast redwood 1 20.0 63 Poor to Fair Yes
Located 21' to bio-retention and 24' to
driveway. Masonry wall required
approximately 4' from trunk. Potential
for cumulative root impacts.
MI 20' 5'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
6. The redwoods along the south property line require a root collar excavation procedure to determine extent of root damage from the condominium construction.
7. Refer to demolition procedures in the General Tree
Protection Specifications.
26 coast redwood 1 30.0 94 Poor to Fair Yes
Located 21' to bio-retention and 24' to
driveway. Masonry wall required
approximately 4' from trunk. Potential
for cumulative root impacts.
MI 30' 8'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
6. The redwoods along the south property line require a root collar excavation procedure to determine extent of root damage from the condominium construction.
7. Refer to demolition procedures in the General Tree
Protection Specifications.
Magnussen's Toyota of Mountain View
Tree Protection Requirements Matrix
Appendix B
MacNair and Associates Page 4 of 5 8/22/24
Tree # Species # of
Trunks
Equivalent
Trunk Diameter
@ 4.5' (inches)
Equivalent Trunk
Circumference@ 4.5'
(inches)
Suitability for
Preservation
(Based Upon
Condition)
Heritage Tree
Status Construction Impact Assessment Construction
Impact Code
Tree
Protection
Zone
(Radius in
Feet)
Critical Root
Zone
(Radius in
Feet)
Specific Tree Protection Requirements
28 coast redwood 1 24.0 75 Poor to Fair Yes
Located 21' to bio-retention and 24' to
driveway. Masonry wall required
approximately 4' from trunk. Potential
for cumulative root impacts.
MI 24' 6'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
6. The redwoods along the south property line require a root collar excavation procedure to determine extent of root damage from the condominium construction.
7. Refer to demolition procedures in the General Tree
Protection Specifications.
29 coast redwood 1 32.0 100 Moderate Yes 22' to parking area. Masonry wall required near trunk. MI 30' 8'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
6. The redwoods along the south property line require a root collar excavation procedure to determine extent of root damage from the condominium construction.
7. Refer to demolition procedures in the General Tree
Protection Specifications.
Magnussen's Toyota of Mountain View
Tree Protection Requirements Matrix
Appendix B
MacNair and Associates Page 5 of 5 8/22/24
Tree # Species # of
Trunks
Equivalent
Trunk Diameter
@ 4.5' (inches)
Equivalent Trunk
Circumference@ 4.5'
(inches)
Suitability for
Preservation
(Based Upon
Condition)
Heritage Tree
Status Construction Impact Assessment Construction
Impact Code
Tree
Protection
Zone
(Radius in
Feet)
Critical Root
Zone
(Radius in
Feet)
Specific Tree Protection Requirements
31 coast redwood 1 30.0 94 Moderate Yes 16' and 24' to parking area. Masonry wall required near trunk. MI 30' 8'
1. Root pruning trench at edge of grading and excavation limits. Project arborist to assess root pruning impact.
2.Strutural pruning and crown cleaning.
3. Provide supplemental irrigation before and after root pruning.
4. Install tree protection fencing prior to start of work.
5. All tree protection areas shall have a three inch depth of bark mulch approved by the project arborist.
6. The masonry wall will need to be a pier and grade beam construction (and cantilevered) to bridge over the critical root zone.
7. Refer to demolition procedures in the General Tree
Protection Specifications.
33 white lead tree
(Leucaena sp.) multi ? Moderate Yes
Located on adjacent property adjacent
to new masonry wall. Moderate
impact likely.
LI 18' 4' Located on the adjacent property. A root pruning trench is required at the property line.
34 crape myrtle
(Lagerstroemia
indica x fauriei)
1 6.5 20 Moderate to Good No (Street
Tree) Currently designated for transplanting. MI NA NA Designated for transplanting. 35 crape myrtle 1 8.0 25 Moderate to Good No (Street
Tree) Currently designated for transplanting. MI NA NA Designated for transplanting.
Appendix C
Complete Tree Protection Specifications
Magnussen’s Toyota Mountain View - Tree Protection Specifications- Appendix C
7/19/24
MacNair and Associates
Development of the project infrastructure, including roads, utilities, drainage facilities, etc., will alter the natural terrain and affect existing trees growing close to the construction areas. Impacts will primarily occur due to the site grading requirements and underground utility installations. The following procedures are recommended to maximize tree survivability.
1. Tree Protection Zone and Critical Root Zone
1.1. All construction activity (grading, filling, paving, landscaping) will respect a Tree Protection Zone (TPZ) around trees to be protected. The TPZ will typically be a one-foot radial distance from the trunk for each one-inch diameter. Exceptions to this standard may occur depending upon individual trees' age, condition, and species tolerance. The Critical Root Zone is the radial area around the trunk where all root impacts should be avoided or mitigated with specialized procedures. Typically, the critical root zone will be a radial distance equal to three times (3X) the trunk diameter.
2. Construction Observations and Supervision
2.1. All arboricultural and related soil work should be performed under the observation of an International Society of Arboriculture (ISA) Certified Arborist (Supervising Arborist) or Client designated representative.
2.2. All specified arboricultural work should be completed before site grading (root pruning, crown pruning, fencing, etc.)
2.3. The contractor is required to meet with the Supervising Arborist or Client designated representative to review the tree protection requirements, including work procedures, access routes, and storage areas.
3. Tree Protection Fencing
3.1. Chain Link fencing at a minimum of six feet in height and marked to prevent inadvertent encroachment by heavy machinery should be installed either at the edge of the Tree Protection Zone (TPZ), the crown drip line (whichever is further from the trunk), or at the edge of the construction zone if the construction zone protrudes into the TPZ. The Supervising Arborist, or Client designated representative, should approve the location of the fencing. All fencing should be in place before any site grading. Fences may not be relocated or removed without the written permission of the Supervising Arborist or Client-designated representative.
3.2. Bilingual (English/Spanish) signage with a contact phone number shall be attached to the fencing in multiple locations with the following language:
Tree Preservation Area
Entry Prohibited without Authorization by…
3.3. Install trunk protection measures for trees within 10 feet of construction activities, which as a minimum shall include the installation of ½ in. closed cell foam padding around the truck of each tree from soil grade to a height of 6 ft. above grade. 2" x 4" x 6' wood planks shall be Magnussen’s Toyota Mountain View - Tree Protection Specifications- Appendix C
7/19/24
MacNair and Associates
installed on top of the padding and secured with metal straps in at least two locations. No fasteners or other invasive hardware shall be driven into the protected trees.
3.4. The contractor shall maintain the protection fencing and prohibit construction personnel or equipment from accessing fenced areas until all site work is completed.
3.5. All structures, including construction trailers, equipment storage areas, and other construction traffic, are prohibited in fenced areas. Burning or debris piles are prohibited within fenced areas. No materials, equipment, spoil, waste, or washout water should be deposited or stored within fenced areas. Fences may not be moved without written permission from the supervising arborist or client-designated representative.
3.6. If temporary access within a fenced area is necessary, then a six-inch layer of bark mulch or gravel should be placed in all areas requiring access. This requirement for mulching should apply to all areas within the fenced area and subject to access. If equipment access is required, the mulch should be overlaid with metal plates of sufficient thickness to distribute the bearing load adequately.
4. Demolition/Site Clearing
4.1. The following work must be accomplished before any demolition or site- clearing activity occurs within 50 feet of protected trees.
4.2. The demolition contractor must meet with the site's project arborist or designated client representativ e before beginning work to review all work procedures, access and haul routes, and tree protection measures.
4.3. The limits of all tree protection zones shall be staked in the field.
4.4. Tree(s) to be removed with branches extending into the canopy of tree(s) to remain must be removed by a qualified arborist and not by demolition or construction contractors. The arborist shall remove the tree in a manner that causes no damage to the tree(s).
4.5. Any shrub clearing required within the tree protection zone shall be accomplished with hand-operated equipment.
4.6. Trees to be removed shall be felled to fall away from tree protection zones and to avoid pulling and breaking the roots of trees to remain. If roots are entwined, the consultant may require first severing the major woody root mass before extracting the trees. This may be accomplished by cutting through the roots by hand, with a vibrating knife , rock saw, narrow trencher with sharp blades, or other approved root -pruning equipment.
4.7. A qualified arborist shall remove trees from within the tree protection zones. The trees shall be cut near ground level, and the stumps shall be ground out.
4.8. All downed brush and trees shall be removed from the tree protection zone either by hand or with equipment set outside the tree protection zone. Extraction shall occur by lifting the material, not skidding it across the ground.
4.9. The brush shall be chipped and placed in the tree protection zone to a depth of 6 inches.
4.10. Structures and underground features to be removed within the tree protection zone shall use the smallest equipment possible and operate outside the tree protection zone.
Magnussen’s Toyota Mountain View - Tree Protection Specifications- Appendix C
7/19/24
MacNair and Associates
The consultant shall be on-site during all operations within the tree protection zone to monitor demolition activity. Asphalt pavement removal within the tree protection zone shall be performed with hand equipment unless approved by the supervising arborist.
4.11. All trees shall be pruned in compliance with ISA Best Management Practices.
4.12. A 6-foot chain link fence with posts sunk into the ground shall be erected to enclose the tree protection zone
4.13. Any damage to trees due to demolition activities shall be reported to the consulting arborist within 6 hours so that remedial action can be taken. Timeliness is critical to tree health.
4.14. If temporary haul or access roads must pass over the root area of trees to be retained, a roadbed of 6 inches of mulch or gravel shall be created to protect the soil. The road bed material shall be replenished as necessary to maintain a 6-inch depth.
5. Site Grading, Trenching, and Root Pruning
5.1. Keep site grading within designated construction zones. Grading cuts or trenching within the TPZ of a retained tree trunk requires special trenching procedures. Trenches should be dug manually with an air spade or using a root-cutting machine, rock cutter, or other approved root-pruning equipment. This root-pruning trench should be placed one foot inside the edge of the grading cut or trench edge. The depth of the trench should equal the depth of the grading cut to a maximum depth of 40 inches. All work expected to encounter roots must be monitored by the Supervising Arborist or Client designated representative.
5.2. A trench may be mechanically dug toward a tree until the edge of the TPZ is reached. Special trenching procedures shall apply from the edge of the TPZ.
5.3. Underground utilities, drains, and irrigation lines should be routed outside the TPZs. When lines must cross the TPZ, they should be bored or tunneled through the area at a depth approved by the supervising arborist. In these instances, a single shared utility conduit should be used to reduce impacts on trees.
5.4. Any roots one inch in diameter or larger requiring removal should be cut cleanly in sound tissue. The roots and surrounding soil should be moistened and covered with a thick mulch (4") to prevent desiccation. No pruning seals or paints should be used on wounds. Cut and exposed roots should be protected from drying. A water-absorbent material (i.e., burlap) should be secured at the top of the trench and draped over the exposed roots. This material should be kept moistened, and the soil replaced as soon as practicable.
5.5. Porous pavements are recommended for use within the TPZ. The pavement subbase should be constructed without grading cuts.
6. Site Drainage
6.1. All grading shall be designed to provide positive drainage away from the base of the tree trunk and not create ponding within the TPZ.
Magnussen’s Toyota Mountain View - Tree Protection Specifications- Appendix C
7/19/24
MacNair and Associates
7. Pruning and Cabling
7.1. Any tree pruning, cabling, or other similar activity that may be proposed as part of site construction will be included in site plans and reviewed by a qualified arborist or client- designated representative.
7.2. Pruning methods shall conform to the ANSI A 300-2001 Pruning Standard Practices and be performed by an ISA Certified Arborist or Certified Tree Worker. Cabling or other support systems shall conform to the ANSI A 300 (part 3)-2000 Standard Practices
8. Tree Damage Mitigation
8.1. Trees damaged or significantly impacted during construction shall be evaluated by the Supervising Arborist or Client designated representative. Proper mitigation measures shall be specified and may include:
8.2. Pruning of damaged and dead wood.
8.3. Installation of a drip irrigation system to provide supplemental irrigation for three to five seasons following damage.
8.4. Proper low nitrogen fertilization timed to growth response and phenological development of the tree.
8.5. Periodic risk assessment of tree.
8.6. Replacement of tree per client requirements.
8.7. Alleviation of severe compaction by vertical mulching with augers or hydraulic soil probes.
8.8. Alleviation of surface compaction by light cultivation or raking and mulch application.
Appendix D
Existing Tree Exhibit