Attachment 07~
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~jh Walter Levison r CONSULTING ARBORIST
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ASCA ReQistered ConsUting Arborlst "401 / ISA Tree Risk Assessment Qua!~ / ISA Certified Arborist 'INVC-3172 ceU (415) 203-0990 I drtree@abcglobal.net
Silfl Acldr9ss: 15680 Gum Tree Lane, Lot Gatos, CA
Assessment of Thirty (30) Protected-Size Trees
at
15680 Gum Tree Lane
Los Gatos, California
Prepared for:
Mr. Azhar Khan, Assistant Planner
Town of Los Gatos Community Development Department
110 E. Main Street
.i
Los Gatos, CA 95030
Field Visit:
Walter Levison, Contract Town Arborist (CTA)
7/1/2016
Report by CTA
Version: 7/21/2016
1 or38
Regi-Ment>w, ~Society of CondlngAlbarists and Member Of the lnllmllloMI Society Of Art>or1cUtn
o Wallor Le\lleon 2018 M R191ts Reserved
Venion: 7fl1/2016
ATTACHMENT 7
~jh Walter Levison rl CO NSULTING ARBORIST ~~ ~~ ..
ASCA Regi stered Consulting Arborlst #401 / ISA Tree Risk Assessment Qual ified/ ISA Certlfted Arborist MC-3172 cell (415) 203-0990 I drtree@sbcglobal.net
Table of Contents
1.0 Summary 3
2.0 Assignment & Background 8
3.0 Tree Location & Protection Fence Map 10
4.0 Observations & Discussion 10
5.0 Town of Los Gatos -What Trees are Protected? 11
6.0 Recommendations 12
7.0 Tree Protection and Maintenance Directions per Town Code 18
8.0 Tree Replacement Standards -Los Gatos Town Code 22
9.0 Author's Qualifications 24
10.0 Assumptions and Limiting Conditions 25
11.0 Certification 26
12.0 Digital Images 26
13.0 Tree Data Table 30
Site Addms: 15680 Gum Tree Lane, Lot Gllot. CA
Regi&tllred Member, American Society Of C<nullng ~ and Member Of the lntemallonal Soci lCy Of All>OrictAture
o Welter LIMson 2018 Al R9rtS Reeerved
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Venilon: 712112018
~jh Walter Levison r CONSULTING ARBORIST
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ASCA Registered ConsUlirig Arborlst ..01 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WC-3172 cell (415} 203-0990 I drtree@sbcglobal.net
1.0 Summary
a. Matrix style overview of protected-size trees (non~xempt species, 4 inches diameter at 4.5 feet above grade). Below, the CTA has outlined expected
impacts to each tree, along with suggestions for adjustments to the plan set (if applicable) that will optimize tree survlval over the long term . Removal
trees, if any, are noted as such in the matrix.
The CTA calculated the appraised value of each tree, which can be used as a tool for determining the proper security bond amount to have the applicant
post with the Town as a hedge against site plan-related tree damages (if applicable). Appraised values can also be used to determine damage fees if trees
are detennined during or after construction to have been damaged such that mitigation is required.
Mitigation replacement rate and size is noted for each tree in the case that removal or damage to trees occurs.
Table 1.01 a) (REFER TO THE CTA'S TREE MAP MARKUP WHEN REVIEWING THIS MATRIX)
Line ~':; Common Name P~ I Appraised Site plan changes or restrictions required to
Number N b Tree Value reduce impacts to less than s1gmficant
um er "-P.Ilir :
1 1 Blue oak YES $8,300.
2 2 Valley oak $6,500.
-
3 3 Coast live oak $440.
4 4 Coast live oak $2,420.
.
5 5 Coast live oak $320.
Si te Addnlss: 15880 an Tree Lane, Loll Gatos. Cl<
Rtglllered Member, Arnmlcan Society ol ConUllng Nbollsts and Memler Of the lnllrMlonll $aciety Of~
c w-.: lelllaon 2016 All Rights RueM!d
Offset the proposed fill area farther from trunk
than currently proposed.
Move water service line trench route to farther
from trunk edge of this tree, if new trench cut is
proposed, or use directional bore technique to
avoid trenching altogether.
Move proposed storm drain line trench to
farther from trunk edge.
None.
Avoid compaction of the new fill soil above
80%.
Avoid compaction of the new fill soil above
80%.
3ol38
Replacement Replacement Rate Per
Cano~y Lost Size Tree
6 24• box
4 24• box
2 24• box
3 24• box
--
2 24• box
Venion: 7121/2016
~jh Wal t er Levison rl C ONS ULTING AR BORIST .~~-
ASCA Registered ~onsultlng Arborilt '401 /ISA Tree Risk Assessment Quallfted /ISA Certitled Arbortst MC-3172 eel (415) 203-0990 I drtree@sbcglobal.net
Tree Large
Line Tag Common Name Protected Appraised
Number Tree Value Number (LPT)?
6 6 Coast live oak $1,510.
7 7 Coast live oak $1 ,670.
8 8 Coast live oak $3,990.
9 9 Toyon $480.
10 10 Coast live oak $320.
11 11 Blue oak $1, 110.
12 12 Coast live oak YES $10,300.
13 13 Blue oak $3,090.
14 14 Valley oak $5,300.
Sile ~ 15680 Gl.m TrM Larl9. Los Gllos, CA
Regiller9d Member, Amllic.n Sodely al ConUlng Alboll* n Yentl« al Ille lnllnWlol .i Sodely al MlarlaAn
CW.. LftSGn 2.016 M Rflll* R-.wd
Replacement Site plan changes or restrictions required to Rate Per Replacement
reduce impacts to less than significant SiZeTree Canopy Lost
Avoid compaction of the new fill soil above 3 24" box 80%.
Avoid compaction of the new fill soil above 3 24" box 800k .
Avoid compaction of the new fill soil above 3 24" box 80%. ..
(To be removed due to conflict with the 3 24" box proposed new retaining wall and fill soil area).
(To be removed due to conflict with the 3 24" box proposed new retaining wall and fill soil area).
Move outfall to farther from trunk edge than
currently proposed on the grading and 3 24" box
drainage plan sheet.
None. 6 24" box
None. 3 24" box
(Perform root crown excavation).
Adjust proposed wall work to farther offset 6 24" box (Current offset: +/-5 feet. Suggested offset: 1 O
feet or more).
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Venion: 7/21tl018
~jh Walter Levison rl CONSULTING ARBORIST M\ 1•-4•-~I .,
ASCA Registered Consulting Arborist #401 / ISA Tree Risk Alsassment Qualflled / ISA Certllled Arborist MC-3172 cell (415) 203-0990 I drtree@sbcglObal.net
Tree Large
Line Protected Appraised
Number Tag Common Name Tree Value Number CLPTI?
15 15 Valeyoak $1,620.
16 16 Valley oak $5,100.
17 17 Valeyoak $890.
18 18 Coast live oak $1,100.
19 . 19 Coast live oak $2,890.
20 20 Coast live oak $2,260.
21 21 Coast live oak $2,390.
22 22 Valley oak YES $9,800.
23 23 Valley oak YES $3,430.
24 24 Valley oak $2,340.
Site Addlell: 159111> Gin Trw Lane, La. Gllot, CA
R1111latenld ........... Anwtc:mrl Society d~Albmlm .-.cl Mlmbel"dlhe lnlamlliGnll Sod«y d Arboriaan
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Replacement Site plan changes or restnctiOns required to Replacement
reduce impacts to less than significant Rate Per SrzeTrae Canopy Lost
None. 3 24• box
None. 3 24• bOx
None. 3 24• box
None. 4 24.box
None, or adjust proposed new driveway to 4 24• box farther offset from trunk edge of this tree.
None. 4 24.box
None. 3 24• box
None. 4 24.box
None. 4 24• box
(Root crown excavation). 3 24.box
50f38
Version: 7121/2016
~jh Walter Levison rl CONSULTING ARBORIST ~\, .......... -.."ti--···-
Af>CA Regislered Consulting Arborlst #401 /ISA Tree Risk Auessment Qualified/ ISA Certltled Arboriat IWC-3172 cell (415) 203-0990 I drtree@sbcglobal.net
Tree Large Replacement Lme Tag Common Name Protected Appraised Site plan changes or restrictlons required to Rate Per Number Number Tree Value reduce Impacts to less than significant Canopy Lost (LPTl?
None, or adjust proposed new driveway
25 25 Coast live oak YES $12 ,300. footprint to farther from the trunk edge of this 4
tree.
(Root crown excavation needed to remove fill
26 26 Blue oak $4,350. placed around tree during previous road and 3
wall development).
27 27 Valley oak $2,640. None. 3
28 28 Blue oak $1 ,470 . None. 3
29 (There I• no tree
#29)
Adjust all current proposed water line trench
30 30 Valley oak $5,500. alignments and storm drain trench alignments 4 to farther offset from the trunk, or use
directional bore to avoid trenching altogether.
Adjust all grading , walkways, driveways, etc. to
farther offset from trunk edge (may not be
feasible within the current proposed site plan
scheme).
31 31 Blue oak YES $10 ,500. 6
Alternatively, the depths of cuts could be
reduced for the above noted proposed it~ms to
reduce the actual severity of root loss and root
damaae to this tree's root svstem.
2016 Town of Los Gatos In-lieu fee equivalent = $250 per each required 24" box mitigation tree planting not Installed on the site.
Sita Addre11: 1561111 Gum Tree L-. Los Gmoe, CA
R~ Mtmller. Allllltc:8l'I Sodet¥ r:leonulng Artlollat. mnd Memllltr:ltlle lnlmrmlorwl Society r:I AltlcllaAlln
~W..LrJtaon2016 M ~ ~
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Replacement
Size Tree
24· box
24· box
24• box
24• box
24" box
24" box
Vinion: 712112016
~jh Walter Levison r CONSULTING ARBORIST
ASCA Registered Consulting Arborist #401 / ISA T ree Risk Assessment Qualified / ISA Certified Arborlst M~ t 72
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cell (415) 203--0990 I drtree@sbcglObal.net
b. Summary of tree disposition and tree issues, based on the grading and drainage plan sheet, version June 2016 submitted to planning division:
• FILL SOIL may negatively affect trees #1, 4, 6 , 7, and #8. The footprint of the proposed fill may need to be reduced in order to prevent encroachment
of fill over the shallow lateral root systems of these trees. Compaction will need to be limited to 80% or 85% max.
• TREES TO BE REMOVED appear to be ##9 & #10. Other trees should be retainable, pending review of proposed irrigation pipe trench routing.
• STORM DRAIN OUTFALL rocks could negatively affect tree #11, and possibly #12. The location of this trench and rock energy dissipater should
probably be adjusted to provide better offset distance from tree #11.
• STORM DRAIN line trenching will negatively affect one or both of trees #2 and #30. This proposed trench should be adjusted to provide better offset
from the trunk edges of one or both of these trees.
• NEW DRIVEWAY footprint development may negatively affect trees #19, 25, and #31. The driveway footprint may be able to be adjusted to provide
slightly better offset from the lateral root systems of these trees.
• ROOT CROWN EXCAVATION is recommended to be performed by hand using small hand tools to remove fill soil from over the root crowns of trees
#14 , 24, and #26 .
• WATER SERVICE LINE trenching, if performed as a new trench route, may negatively affect tree tl2. and/or #30. The route can be adjusted to provide
better offset distances from these trees, or the pipe can be installed using directional bore or other trench less technol<>gy which avoids trenching
altogether.
• TREE #14 may be damaged by development footprint work (see the CTA's map mark-up below).
• TREE #31 will be surrounded by proposed new grading and development work. It Is not clear if this tree will need to be removed, or if proposed work
can be restricted In terms of cut depths, etc. to allow for the tree to remain in its current condition rating of 78% ("goodj. The CTA suggests that Staff
consider this tree to be a ·removal" for planning and fee collection purposes.
• LANDSCAPE & IRRIGATION PLAN: The proposed irrigation pipe trenching plan was not available for review at the time of writing. However, a
preliminary landscape plan sheet L-1 dated 611212016 was available for the CTA's review. The following are the CTA's initial comments :
o Tree plantings proposed for the west sides of existing native oak specimens will have a negative effect on the trees' health due to the eventual
blockage of sunlight to the oaks from that crucial afternoon sun that beams in from the west. Trees that appear to be affected by shading from
current preliminary plan tree plantings include trees #1 , 2, 4, and #25 .
o The applicant will need to provide irrigation pipe trench routes for review ·by the CTA and the planner associat•!d with this project, prior to
finalization of the building set of plans.
Site Addrass: 15880 GU'n Tree Lane , Loi Gatos. CA
R9glltenld Memb9r, Amwlcan Society ol Consul'ing Artlolllla end Merrber ot the lrDmllionll Society ol AltxlriCIA.n
~ Wiiier LIM80ll 2018 M Rights Reaerved
?'&38
Vereion: 7/21flD18
~h Walter Levison rl CO~SULTING ARBORIST
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ASCA Registered Consulting Arborist 1401 / ISA Tree Risk Assessment Qualified / ISA Certtned Arborist tM/C-3172 cell (415) 203-0990 I drtree@sbcglobal.net
• REMOVALS: Trees #9 and #10 will be removed due to conflicts with proposed retaining wall and patio fill construction. These two trees are not
currently plotted on the applicant's plans, and are thus not shown as being removals.
c. Security Bonding :
The new 2015 iteration of the Town tree ordinance section 29.10.1000 (c)3 includes wordage that requires that all trees being retained on a development
site need to be appraised for dollar value at the applicant's expense prior to building or grading permits being issued by the Town. Part 'f of this same tree
ordinance section states that the Town may condition a security bond prior to issuance of a permit, in the sum Of $5,000 per each tree being preserved, or
$25,000, whichever is less. The ordinance does not contain wordage as to whether this includes neighbor-owned trees adjacent to construction.
Therefore, the CTA will assume that neighbor-owned trees are included as trees Mrequired to be preserved" (if applicable).
Note that the total appraised value of trees being retained at this site per the CT A's determination above in table 1.0(a) is far beyond the potential
minimum ($5,000 per tree retained X 5 = $25,000) security bond per Town ordinance. Therefore, if applicable, it would be reasonable, based on the actual
appraised values of the trees being retained at this site, for the Town to condition the project approval upon posting of a security bond in the amount of at
least $25,000 or more.
2.0 Assignment & Background
Walter Levison, Contract Town Arborist (CTA) was directed to tag and assess all Protected Size (4 inch diameter and greater) trees both on the property
proposed for site plan work and (In some cases) adjacent to the site plan area within 1 O linear feet of property lines.
Note that •exception• trees not protected under the current Town tree ordinance (e.g. fruit and nut trees <18 inches diameter, and Tasmanian blue gum, red
gum, blackwood acacia, tulip tree, tree of heaven , palms (except Phoenix canariensis), and privet <24 inches diameter, etc.) were IJ21 tagged or assessed
by the CTA.
On "Hillside" properties (see Hillside map, next page), all eucalyptus species are considered exception trees, and are not protected by Town ordinance
provisions. The Gum Tree Lane project is within the "Hillside Area·.
"Large protected tree" (LPT) as noted in the tree table below in this report means any oak (Quercus), California buckeye (Aesculus califomica), or Pacific
madrone (Arbutus menziesii) which has a 24 inch or greater diameter (75 inch circumference); or any other species· of tree with a 48 inch or greater
diameter (150 inch circumference). Trunk measurement in the case of a multiple stem tree Is the sum of all mainstem diameters.
The author tagged all trees in this study at 5 to 6 feet above grade using large racetrack shaped tags numbering ·1• through •31• as noted on the tree map
below in this report. Disregard older round shaped aluminum tags affixed between 1 and 5 feet above grade on tree mainstems by Debbie Ellis, Consulting
Arborist in 2013 during her arborist report production for the Town. Also note that there is no "tree ##2.9• in the new CTA survey, so the total number of
survey trees is actuaUy 30, not 31 .
Only trees within the 15680 Gum Tree Lane lot were surveyed for this particular assignment.
Only trees within approximately 30 feet of proposed new work were included in this study. There were at least 20 to 30+ additional native oak tree
specimens of regulated size that were excluded from this study due to their positions at 40, 50, 60 linear feet, or further, from proposed new site plan work.
Sita Add11111: 15680 Gum TIM t.-. LOI Gmlos, CA
Regillenld Mentler, Amlrk:ln Society of Conlullng Albolllls end Member Of the lnterMllonel Society of ArbarlclAl'e
C Wiiier Lftlson ZQt& N Rlghls R.-wd
11oi38
Vinion: 712V2018
~jh Walter Levison rl CONSUL TING ARBORIST A:\
.~:::~~~~-
ASCA Registered Consulting Arborist ..-01 /ISA Tree Risk Assessment Quallfled /ISA Certified Arborist #WC-3172 cell (415) 203-0990 I drtree@sbcglobal.net
Removals: Although no trees are proposed by t!he applicant to be removed, there are two (2) small diameter regulated size trees #9 and #1 o that will be
removed as a result of direct conflicts with proposed new retaining wall construCtion and building footprint construction.
Hillside Area Map
ll •
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Slt. Add1911: 1lill80 Gum TIM Line, Los Gmoa, CA
R~ ~. Amllk:an Soclely Of Ca1sullng Arballll9 end Member Of hi lrMmllon.i Sodllly Of ArbcwbAn
Cl V,__ L...iaon 2016 M ~ R..-1
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Veralon: 7121/2016
~h Walter Levison rl CONSULTING ARBORIST
3.0 Tree Location & Protection Fence
Map
The CTA marked up the applicant's preliminary grading
and drainage plan sheet dated June 2016 by Hanna-
Brunetti.
The red dashed lines indicate the CTA's suggested
chain link root protection fence alignment (initial rough).
Based on the current proposed plan, most of the trees
proposed to be retained and protected should have
enough root zone square footage retained inside these
fenced areas to maintain normal vigor (assuming that
the general contractor erects fencing along the routes
suggested on the map markup at right). Trees that may
be negatively impacted include:
• Trees #1, 4, 6, tn, and #8 due to proposed
graded fi11 placement.
• Tree #11 due to the proposed drain outfall.
• Tree #14 due to encroachment by the proposed
work footprint
• Tree #19, 25, and #31 due to proposed new
driveway footprint development.
••• •11 1.i '·1 ii. ~.
1;1
11!
I
• Tree #30 and possible tree #2 due to
proposed water service line trenching and storm
drain line trenching .
• Tree #31 which will be surrounded by various I f2J
site plan elements on most sides of the tree.
Yellow lines indicate the project team's proposed new
drainage pipe trench route and the proposed new water
service line trench route.
4.0 Observations & Discussion
(See report section 1.0 Summary above for observation
and discussion items).
Site Adehu: 15880 GWTI Trw ~ Loi Gllo9, CA
J;
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ReglsNNd M9mber. An111an Society or ea-nng Albollsts llld Menk or 111e ll'llemdonlll Sodety or A1t1ortaAn
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!;_'lCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WC-3172 cell (415) 203-0990 I drtree@sbcglobal.net
5.0 Town of Los Gatos -What Trees are Protected?
Per the most recent (2015) iteration of the Town of Los Gatos tree ordinance (Town Code Chapter 29-Zoning Regulations, Article 1), the following
regulations apply to all trees within the Town's jurisdiction (wordage adjusted):
1. All trees with at least a single mainstem measuring four ( 4) inches diameter or greater at 4.5 feet above grade are considered "Protected Trees" when
removal relates to any development review.
2. 12 inch diameter (18 inch multistem totaO trees on developed residential property not currently subject to development review.
3. 8 inch diameter {8 inch multistem total) blue oak (Quercus douglasil), black oak (Quercus k9llogi1), Califcrnia buckeye (Aesculus califomica), and
Pacific madrone (Arbutus menziesi1) on developed residential lots not currently subject to development review.
4. 8 inch diameter (8 inch multistem total) trees on developed resrdential property not currently subject to development r·eview, on lots in the designated
Hillside Area per the official Town map.
5. All trees with a single malnstem or sum of multiple malnstems totaling 48 inches diameter or greater at 4.5 feet above grade are considered "Large
Protected Trees" (LPT).
6. All oak species (Quercus spp.), California buckeye (Aesculus califomica), and Pacific madrone (Arbutus menziesm with one or more mainstems
totaling 24 inches diameter or more at 4.5 feet above grade are considered "Large Protected Trees" (LPT).
7. Section 29.10.0965. Prohibitions: A pennit is required to prune, trim, cut off, or perfoim any work, on a single occasion or cumulatively, over a three-
year period, affecting 25% or more of any Protected Tree (including below ground root system).
8. Section 29.10.0965. Prohibitions : A pennlt is required to prune, trim, or cut any branch or root greater than four (4) im:::hes in diameter of a Large
Protected Tree.
9. Section 29 .10.0965. Prohibitions: A permit is required to conduct severe pruning on any protected tree. Severe pruning is defined in section
29.10.0955 as "topping or removal of foliage or significant scaffold limbs or large diameter branches so as to cause permanent damage and/or
disfigurement of a tree, and/or which does not meet specific pruning goals and objectives as set forth in the current ve1rsion of the International Society
of Arboriculture Best Management Practices-Tree Pruning and ANSI A300-Part 1 Tree, Shrub, and Other Woody Plant Management-Standard
Practices, (Pruning)."
10. Exceptions:
Severe Pruning Exception in Town Code section 29.10.1010(3) • ..... except for pollardlng of fruitless mulberry (Morus .i1/ba) or other species approved
by the Town Arborist... :.
Protected Tree Exceptions:
a. Edible fruit or nut bearing trees less than 18 inches diameter (multistem total or single stem)
Site Address: 15680 GIM!I Tnie Lana, Los Gatos, CA
Registered Mernbar, Amellcen Soeiely of Consullng AtbollatB 'Ind Member Of the ~ Society ol ArbcriaAn
C> Wr/IM lalllaon 2.016 Al ~ R--S
11 of38
Veraion: 7121/2016
~jh. Walter Levison rl CONSUL TING ARBORIST Ji\ ',_,_ ·-· t',.,~M•
ASCA Registered ConsulUng Arborist 1401 I ISA Tree Risk Assessment Qualified / ISA Certified Arborist #VVC-3172 cell (415) 203-0990 I drtree@sbcglobal.net
b. Acacia melanoxy/on (blackwood acacia) less than 24 inches (multistem total or single stem)
c. Liriodendron tulipifera (tulip tree) less than 24 inches (multistem total or single stem)
d. Ailanthus altissima (tree of heaven) less than 24 inches (multistem total or single stem)
e. Eucalyptus g/obulus (Tasmanian blue gum) less than 24 inches (multistem total or single stem)
f. Eucalyptus camaldulensis (River red gum) less than 24 inches (multistem total or single stem)
g. Other eucalyptus species (E. spp.) not noted above, less than 24 inches (multistem total or single stem)
(REMOVAL O.K. ONLY AT HILLSIDE AREA LOCATIONS PER OFFICIAL TOWN MAP):
www.losgatosca.gov/documentcenter/view/176
h. All palm species (except Phoenix canariensis) less than 24 inches (multistem total or single stem)
i. Ugustrum lucidum (glossy privet) less than 24 inches (multistem total or single stem)
6.0 Recommendations
1. Project Arborist C-PA"):
Initial Signoff
It is suggested that a third party ASCA registered consulting arborist or ISA Certified Arborist with good experience with tree protection during
construction be retained by the applicant, to provide pre-project verification that tree protection and maintenance measures outlined in this section of
the arborist report are adhered to. Periodic (e.g. monthly) inspections and summary reporting, if required as a project condition of approval, are
suggested in order to verify contractor compliance with tree protection throughout the site plan project. This person will be referred to as the project
arborist ("PA"). The PA should monitor soil moisture within the root protection zones of trees being retained, using a Lincoln soil moisture probe/meter
or equivalent. If required, inspection reports shall be sent to Mr. Azhar Khan, Assistant Planner, at akhan@losgatosca.gov •
Sample wordage for a condition of approval regarding monitoring of tree protection and tree condition:
"The required protective fencing shall remain in place until final landscaping and inspection of the project. Project arborist approval must be obtained
and documented in a monthly site activity report sent to the Town. A mandatory Monthly Tree Activity Report shall be sent at least once monthly to the
Town planner associated with this project (akhan@losgatosca.gov )beginning with the initial tree protection verification approval letter".
2. Project Team Actions or Clarifications Requested :
i. Tree Removal In-Lieu Fees: (Per the Town tree canopy replacement standard matrix).
It is suggested that Town Staff condition this project on a combination of in-lieu fee payment, and replacement tree plantings installed on site.
Removal trees proposed by the applicant Include trees #9 and #10, for which the canopy replacement Is six (&) 24" box size trees, or
payment of 6 X $260 per 24" box tree not Installed, which is $1,500. As noted, a combination of plantings and payments can be
made, or simply one or the other.
SI• AdchA: 15680 Girn TIM IM19, Loll Galo1; CA
Regitt«llcl Member, AnwlClrl Soclely of eor.Atng Albarl* n1 u.nmr of Iha -IMmalalll Society of M1or1aAn
c W... LNson 2.016 Al Rlgt1ll R..wd
12of38
Venion: 7/21l2016
~)h Walter Levison rl CONSULTING ARBORIST M\
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ASCA Registered Consulting Arbortst ...i<l1 / ISA Tree Risk Assessment Qualified / ISA Certified Arborlst #l/VC-3172 cell (415) 203-0990 I drtree@sb1:9lobal.net
It is suggested that Town Staff condition this project on receiving security bond monetary funds from the applicant in the minimum amount of
$25,000, as a hedge against potential decline or death of one or more of the 28 survey trees to remain in clos;e proximity to the proposed site
plan project. Staff may choose to increase the fee to an amount above and beyond this minimum recommencled fee.
ii. Fill Soil:
Adjust the pn>posed new fill soil footprint such that new compacted fill installation will not damage the root crc.wns or lateral root systems or
otherwise disrupt trees #1, 4, 61 7, or #B being retained. Limit compaction rate to less than 85% to allow roots of remaining trees to maintain
normal aerobic function.
iii. New Landscape and Irrigation:
Irrigation Trenching: Project team shall verify the types, trench depths, etc. of all irrigation main lines, valves, laterals, pop-ups, etc. (if any
proposed) within 20 to 25 feet of all trees being retained in close proximity to proposed work, submitting a formal irrigation plan sheet for
review by the CTA and/or Town Planning Staff.
Project team shal use only flexible poly tubing type irrigation pipes for all areas within 20 linear feet of all trees being retained.
Plantings West of Existing Trees: Project landscape architect shall redesign the tree planting scheme such th.It proposed new tree
installations that were to be located west of the trunks of existing trees #1, 2, 4, 5, and #25 are repositioned to minimize or eliminate shading
to the existing trees that would otherwise occur during afternoon western sun tracking . Native oaks require full sun to thrive, and new plantings
located south of or west of the existing oaks would cause direct shading to occur, which could reduce photos}1nthesis and severely stunt or kill
the oaks as their sugars and starches produced through photosynthesis would be reduced .
Side Note: Do NOT Install any landscape seating elements, BBQ, etc. within 45 feet of
oak #12, as this tree is at high risk of failure and should be considered a no-go zone in
terms of human presence.
iv. Temporarv Construction Period !njgation:
If feasible, the applicant's pn>ject team shall provide once-monthly heavy irrigation water to
survey oak trees being retained. Use only bubbler or emitter line irrigation or hose irrigation
over grade, applying water only to areas at least 15 feet away from the trunks.
v. Root Crown Excavation:
Perform root crown excavation by hand using hand tools within zero to two horizontal feet of
trees #14, 24. #26, and #30 to reestablish original soil grade. See the image at right for an
example of conect grade around a tree's root crown.
Site Addreaa: 15680 Gwn TrH Lane, lcll Glll09, CA
Regi.tnd Member, AlllllliQn Sodety of CanlUllng AltJClltata and Mentier or the lni.m.llonat Society of Att>orlaAn
c WtJ.ter LeviSon 2016 M R11#1ta ReeeMld
13 Of 38
Root
Collar
Area
Vnon: 7121/2016
~]h Walter Levison rl CONSUL TING ARBORIST
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ASCA Registered Consulllng Arborlst #401 I ISA Tree Risk Assessment Qualified I ISA Certified Arborist #WC-3172 cell (415) 203-0990 I drtree@sbcglobal.net
vi. Storm Drajn Alignment:
Adjust the proposed storm drain alignment to better offset trench cuts from the trunks of trees #2, #11 and #30.
vii. Rock Eneray Dissipater:
Adjust the proposed rock energy dissipater location to provide better offset distance from the trunk of tree #11.
viii. Utility Trench Alignments:
All new utility undergrounding (communications conduit, electrical conduit, gas pipe, etc.) shall be aligned to maintain a 20 to 25 foot minimum
offset distance from the trunk edges of all trees being retained.
Water Service line: The water service trench alignment will need to be adjusted to provide a better offset distance from the trunk of tree #30 .
If this cannot be accomplished, then use directional
ix.
x.
bore technique to avoid trenching altogether.
Oak #14 /Adjustments to Proposed Work:
It is suggested that proposed work be adjusted to
maintain better offset from the trunk edge of this tree
(e.g. 15 to 20 feet , etc.).
Oak #31 / Ad!ustments to Procosed Work:
Due to various proposed porous surfacing and other
installations and grading daylight limits that encroach to
within close distances of tree #31, this tree specimen
will need to be considered by Town Staff to be a
"removal•, whether or not the tree is actually removed
from the landscape. All proposed •porous surfaces•
and "pervious surfaces" within 25 feet of this tree
should be placed over grade if possible, with a no-dig
type base course such as is shown at right (zero-cut).
Note that simply because a proposed porous system
installation is •porous·, this does not mean that the
system can be installed without a very significant base
section being excavated into the subgrade which in
itself could cause severe damage or total destruction of
a tree's lateral woody roots and absorbing roots
coursing through the soil profile at between
Site Add .. n : 15680 Gum Tree Lane. Los Gllto1, CA
Registered Member. American Society of Consulting Alborlats and Member Df the lntemdonal Society of Alborirulture
c Walter Le11fson 2016 All RVQ ReseMld
14 of38
EXISTING HE~rrAGE PAKTREE
EDGE RESTRAINT "RVERsoN"
114• xs· .STEEl EDGE & STAKES
SI WALKTO BE R'1MOVED
2-3,...
PERMEABLE INTERLOCKING PAVERS .
(MAN~FACTURER, SIZE AN~ PATTERN T.B. D.)
AASHTO N0.8 (3J8•)
CRUSHED STONE BASE
EX, PLANnNGAREAGI
W/ MIN. 3• tAYER OF BAI
INFILL PAVER JOINTS Wmt SAME
N0.8 CRUSHED STONE EX. CONC:. CO.U~ARD )'
A 1\:: cw:t4 < c&5ft"I
3• LAYER OF CLASS II P~RMEABLE AGGREGATE BASE
HANl>-'004PED TO MAX. 75""80%
DBL LAYER Of 4•.5• WASHED " TENSAR BX.1100 BIAXIAL GEOGRID
RNERSTONE-(MAINTAIN 6" OVER EX. ROOT & SOIL SURFACE.
CLEARANCE FROM TREE TIWNK)
lYPICAL SECTION 1·112•= 1•-0•
Version: 712112016
~jh Walter Levison rl CONSU L TI N G ARBORIST
ASCA Registered Consulting Arborist ..S01 / ISA Tree Risk Assessment Qualified / ISA Certltled Arborist #V\IC-3172
approximately zero and 24 inches below grade.
If cuts will exceed 8 inches below existing grade elevations within 25 linear feet of the trunk of this tree, then
contact the project arborist to discuss possible redesigns that can be accomplished as •fleld adjustments• to
allow for better root zone preservation.
xi. New Driveway:
• If possible, adjust the proposed driveway surface to provide better offset from trees #19, 25, and #31. See al1;0
the Image above right Illustrating an actual City-approved real world solutlon which avoided excavatlc•n
altogether over the root zone of a heritage oak at a very high p..Oflle location. ·
• For the new "pervious surface as noted on the applicanfs proposed grading and drainage plan sheet, utilize a:
z~ro cut or minimal cut type specification such as is shown above right. This specification utilizes Tensar Corp's
BX-1100 biaxial geogrid which is a lateral load transferring material that looks like a two-dimensional plastic v.'eb.
The web is pinned down over grade, and baserock and other materials are tamped down over it. This is the g•lld
standard of tree root protection, and is locally available through Reed & Graham geosynthetics division . The
biaxial geogrid disperses load forces laterally, to provide significant strength which allows for the baserock base
section to be thinned by as much as 50% per the Tenaar Corp official website.
Options for surfacing include use of unsealed degraded granite, GravelPave, GrassPave,
or simply use permeable type paver stones that allow for infiltration of rainwater directly
downward into the paver block material itself.
3. Trunk Buffer Wrap Type Ill Protection :
Prior to demolition commencement, install a trunk buffer around the lowermost 8 to 10 feet of the
trunks of trees #1, 14, 25, 30, and #31. Redo the existing buffer around tree #26, as it was
instaDad In reverse with the wood boards against the trunk bark which can be damaging to
the bark and wood tissue.
Wrap approximately 1 O to 15 wraps of orange plastic snow fencing around the trunk between grade
and 8 feet above grade to create a padding at least 1 to 2 inches thickness.
~
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Stand 2x4 wood boards upright, side by srde, around the entire circumference of the trunk. Affix using duct tape (do not use wires or ropes). See spec
image at right.
4. Chain Link Fencing Type I and/or Type II Protection :
Erect five-foot tall chain link fence on seven-foot long, twcrinch diameter iron tube posts pounded 24 inches into the g1ound (see sample image at
right).
Site AddrMa: 1!all6'an Tree i.ar., Loll Gato1, CA
Regishnd lolembar, ~Society dCGnlulliflOM>olltts Md NeMler of the ir8rlwlklll8I Society d Albataliue
c Wtllt« L.Naon 2019 Al R191U R--r
15 Df 38
Vol'lion: 7fZ1Q016
'Jl ~~!t~r..!-~~~~m M~
......r.~9oc: ..... ~ .,,_M __ _..l<!o,•
ASCA Registered Consulting Arborlst #401 I ISA Tree Risk Asseasment Qualified I ISA Certified Arborist MC-3172 cell (415) 203-0990 I drtree@sbcglobal.net
Pre-demolition fence: Per the red dashed llnes on the tree map mark-up in the CTA's arborist report (routes may be subject to change,
depending on the finalized alignments of work items).
This fencing must be erected prior to any heavy machinery traffic or construction material arrival on site.
The protective fencing must not be temporarily moved during construction . No materials, tools, excavated soil, liquids, substances, etc. are to be
placed or dumped, even temporarily, inside the root protection zone or "RPZ".
No storage, staging, work, or other activities will be allowed Inside the RPZ except with PA monitorl~g.
Optional for fencing material: Use chain link fencing panels set on moveable concrete block footings. Wire the fence panels to iron layout stakes
pounded into the ground at the ends of each fence panel to keep the fence route stabilized and in· its corr~ position. Do not wire the fence panels to
the trunks of the trees.
5. Signage: The RPZ fencing shall have one sign affixed with UV-stabilized zip ties to the chain link at eye level for every 25-linear feet of fencing,
minimum 8"X11" size each, plastic laminated, with wordage that includes the Town Code section that refe~ to tree fence protection requirements
(wordage can be adjusted): ·
' TREE PROTECTION ZONE FENCE
ZONA DE PROTECCION PARA ARBOLES
-NO ENTRE SIN PERMISO-
·LLAME EL ARBOLISTA-
REMOVAL OF THIS FENCE IS
SUBJECT TO PENAL TY ACCORDING TO
LOS GATOS TOWN CODE 29.10.1025
PROJECT ARBORIST:
TELEFONO CELL:
Sita Addm1: 15680 Gum Trae Lane, Lo• Gato1, CA
Reglltered Membw. American Society of Coneullng Artlorisb and Member of the International Society of Albol1Cllllu18
e waiter Levison 2016 Al rusta Rel8Mld
EMAIL:
16 of 38
Verilon: 712112016
~)h Walter Levison rl CONSULTING ARBORIST
ASCA Regislenld _Consulting Arbotist iM01 /ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WC-3172
6. Irrigation Temporary During Construction:
Apply temporary irrigation to certain specified trees being retained, at a frequency and duration
or total output to be specified by the project arborist (PA).
Method of water delivery can be soaker hose, emitter line, garden hose trickle. water truck, tow-
·behind water tank with spray apparatus. etc.
Initial suggestion by the CTA is 1xlmonth heavy -irrigation of all trees being retained, at a rate
of 100 to 200 gallons per month per tree, applled only at 16 to 25 feet out f!om the trunk!
of the oak trees. This type of once-montlhly deep watering during the dry season at locations far
out from the trunks has been scientifically proven to benefit native California oaks in drought
situations, and could actually reverse existing canopy vigor declines expressed as twig density
reductions that we see in many of the oaks at this site as of the date of writing. Note that if water
is applied closer than approx. 15 or 20 feet from trunks, the water will cause a soil moisture boost that will
encourage the advancement of root rot type pathogens that can kill these native oaks .
In order to get irrigation water to percolate downward into the root zones of the trees at these di1tances from
the trunks, straw wattles will probably have to be installed along level contours us ing the wooden pins that
are provided with the wattles (see sample forestry example image at right).
7. Pruning (if aoolicablel:
All pruning shall be perfonned only by, or under direct full time supervision of an !SA-Certified Arborist, and
shall conform to the most current Iteration of the American National Standard Institute pruning guidelines
and accompanying ISA Best Management Practices I Pruning booklet:
• ANSI A300 (Part 1) tree, shrub, and other wood plant maintenance I standard practices (pruning). 2001.
• Best Management Practices I Tree Pruning: companion publicat ion to the ANSI A300 Part 1: tree,
shrub, and other wood plant maintenance I standard practices (proning). International Society of
Arboriculture. 2002.
Suggested Pruning Prescription: (None suggested at the time of writing).
8. Root Prunjng:
If woody roots measuring greater than 1-inch in diameter are encountered within 25-feet of any tree being
retained during site work (e.g. trees #2, 30, 31, etc.), contractors shall immediately alert the project arborist,
A~ A}~ ·-·-··q·m;-...
cell (415) 203-0990 I drtree@sbcglobal.net
and shall proceed to sever roots at right angles to the direction of root growth using sharp hand tools such as professional grade loppers, hand shears,
chain saw, A/C sawzall , or other tools only under his/her direct supervision. See spec images at right. Note that a Sawzall blade indicating use for
Site Addr.ss: 1581111 Gin Tree Lane, Los Galoa. CA
Regilteied Member, AmlltC811 Soeiety of Condng MlaltAtl Ind Merrk of lhe lnl8melan11l Sode\)' of AlbctiaAn
e VIWl:M Lwson 21118 /II~ ReMM!d
170!38
Ve!Bion: 7121/2016
~jh Walter Levison rl CONSULTING ARBORIST
ASCA Registered Consulting Arbortst #401 / ISA Tree Risk Assessment Qualified/ ISA Certlfted Arborlst tNVC.3172
"bimetal" or •demolition" is typically not a good choice for this work. Instead, opt for a relatively large.tooth'.ed blade that
indicates use for "pruningw or "wood" (see image at right). '
Woody roots shall not be shattered or broken in any way as a result of site activities. Shattered or broken areas shaD be
hand dug back into clear healthy root tissue and re-severed at right angles to root growth direction under the direct
supervision of the project arborist (PA). Immediately (same day) backfill over roots and heavily irrigate (same day) after
backfill to saturate the uppermost 24 inches of the soil profile.
9. water Spray:
Spray off foliage of all trees within 30 feet of construction activity using a very high power garden hose or a .pressure
washer system set on low pressure to wash both the upper and lower surfaces of foliage . This helps keep the gas
portals (stomata) unclogged for better gas exchange which is crucial for normal tree function (see image at right in which
a fire hose system was used to wash approximately 50 redwood tree specimens in Sunnyvale during a one year long
demolition period).
Spray should be applied approximately twice yearly, or when ambient airborne dust concentration is unusually high.
7.0 Tree Protection and Maintenance Directions per Town Code
~\ ··--····~---
The following is excerpted directly from the 2015 iteration of the Town of Los Gatos tree ordinance sections which provide specific tree protection directions
and limitations on root pruning and above-ground pruning:
Sec. 29.10.1000. New property development.
(a) A tree survey shall be conducted prior to submittal of any development application proposing the removal of or impact to one or more protected
trees. The development application shall include a Tree Survey Plan and Tree Preservation Report based ~>n this survey. The tree survey inventory
numbers shall correspond to a numbered metal tag placed on each tree on site during the tree survey. The tree survey plan shall be prepared by a certified
or consulting arborist, and shall include the following information:
(1) Location of all existing trees on the property as described in section 29.10.0995;
(2) Identify all trees that could potentially be affected by the project (directly or indirectly-immediately or in long term), such as upslope grading or
compaction outside of the dripline;
(3) Notation of all trees classified as protected trees;
(4) In addition, for trees four (4) inches in diameter or larger, the plan shall specify the precise location of the trunk and crown spread , and the
species, size (diameter, height, crown spread) and condition of the tree.
(b) The tree survey plan shall be reviewed by the Town's consulting arborist who shall, after making a field visit to the property, indicate in writing or as
shown on approved plans, which trees are recommended for preservation (based on a retention rating of high/moderate/low) using, as a minimum, the
Standards of Review set forth in section 29 .10.0990. This plan shall be made part of the staff report to the Town reviewing body upon its consideration of the
Siie Add!Ms: 1!lllllO Gin Tree i..., Lot Gllto1, CA
Reglsthd Member, AmellClll'I Society of Conluftlng M>orlala m1d Member of the lntemdon .. Soci61y of Alboriaitunl
Cl WI/bf l .... IOn 2016 All Rights ReterWd
1Bof38
Varllon: 712112D1B
~jh Walter Levison r CONSULTI N G ARBOR I ST ~\ .. -.. ,.~~-..
~A Registered Consulting Arborist #401 / ISA Tree Risk Aaseameot Qualfied / ISA Celtified Alt>orfst IJWC-3172 cell (415) 203-0990 I drtree0&bcglobal.net
application for new property development;
(c) When development impacts are within the dripline of or will affect any protected .tree, .the applicant shall provide a tree preservation report prepared
by a certified or consulting arborist. The report, based on the findings of the tree survey plan and other relevant information, shall be used to determine the
health and structure of existing trees, the effects of the proposed development and vegetation removal upon the trees, recommendations for specific
precautions necessary for their preservation during all phases of development (demolition, grading, during construction, landscaping); and shall also
indicate which trees are proposed for removal The tree preservation report shall stipulate a required tree protection zone (TPZ) for trees to be
retained, including street trees, protected trees and trees whose canopies are hanging over the project site from adjacent properties. The TPZ shall be
f13nced as specified in section 29.10.1005:
(1) The final approved tree preservation report shall be lnduded In the building permit set of development plans and printed on a sheet titled:
Tree Preservation Instructions (Sheet T-1). Sheet T-1 shall be referenced on all relevant sheets (civil, demolition, utirlty, landscape,
irrigation) where tree impacts from improvements may be shown to occur;
(2) The Town reviewing body through its site and design plan review shall endeavor to protect an trees recommended for preservation by the
Town's consulting arborist. The Town reviewing body may determine if any of the trees recommended for preservation should be removed , if
based upon the evidence submitted the reviewing body determines that due to special site grading or other unusual characteristics
associated with the property, the preservation of the tree(s) would significantly preclude feasible development of the property as described in
section 29.10.0990;
(3) Approval of final site or landscape plans by the appropriate Town reviewing body shall comply with the following requirements and conditions of
approval:
a. The applicant shall, within ninety (90) days of final approval or prior to issuance of a grading or building permit, whichever occurs
first, secure an appraisal of the condition and value of all trees included in the tree report affected by the dEM!lopment that are required to
remain within the development using the Tree Value Standard methodology as set forth in this Chapter. The appraisal of each tree shall
recognize the location of the tree in the proposed development. The appraisal shall be performed in accordance with the current edition of
the Guide for Plant Appraisal published by the Councll of Tree and Landscape Appraisers (CTI.A) and the Species and Group Classification
Guide published by the Western Chapter of the International Society of Arboriculture. The appraisal shall be performed at the applicant's
expense, and the appraisal shall be subject to the Director's approval.
b. The site or landscape plans shall indicate which trees are to be removed. However, the plans do not ccoflstitute approval to remove a
tree until a separate permit is granted. The property owner or applicant shall obtain a protected tree removal permit, as outlined in section
29.10.0980, for each tree to be removed to satisfy the purpose of this division.
(d) Prior to acceptance of proposed development or subdivision improvements, the developer shall submit to the Director a final tree preservation
report prepared by a certified or consulting arborist. This report shall consider all trees that were to remain within the deVoelopment. The report shall note
the trees' health in relation to the initially reported condition of the trees and shall note any changes in the trees' numbers or physical conditions. The
applicant wil then be responsible for the loss of any tree not previously approved for removal. For protected trees, which were removed, the
developer shall pay a penalty in the amount of the appraised value of such tree in addition to replacement requirements contained in section
29.10.0985 of this Code. The applicant shall remain responsible for the health and survival of all trees within the development for a period of five (5) years
following acceptance of the public improvements of the development or certificate of occupancy.
(e) Prior to issuance of any demolition, grading or building permit, the applicant or contractor shall submit to the Building Department a written
statement and photographs verifying that the required tree protection fence is installed around street trees and protected tr·aes in accordance with the tree
5119 Addnw: 15880 G1111 TllMI Lllne. Loa Gllos, CA
Reijsterecl Menk. Amllielll Sodety ol Carla~ Mlallats and MerrW ol lw l!Bmdonll Society ~ ArballaAlnl
c Waller Lll'4ison 2016 All Rlghls RtMMld
1110138
var.ion: 7fl1J2016
~jh Walter Levison rl CO N SULTING A R BORIST .&~
ASCA Registered Consulting Arborlst '401 / ISA Tree Risk Assessment Qualified / ISA Certified Arborist IM.IC-3172 , cell (415) 203-0990 I drtree@sbcglobal.net
preservation report.
(f) If required by the Director and conditioned as part of a discretionary approval, a security guarantee shall be provided to the Town. Prior to the
issuance of any pennit allowing construction to begin. the applicant shall post cash, bond or other security satisfactory to the Director,· in the penal
sum of five thousand dollars ($5,000.00) for each tree required to be preserved, or twenty-five thousand dollars ($25,000.00), whichever is less. The
cash , bond or other security shall be retained for a period of one (1) year following acceptance of the public improvements for the development and shall
be forfeited in an amount equal to five thousand dollars ($5,000.00) per tree as a civil penalty in the event that a tree or trees requir ed to be preserved
are removed, destroyed or severely damaged.
(g) An applicant with a proposed development which requires underground utilities shall avoid the installation of said utilities within the dripline of
existing trees whenever possible. In the event that this is unavoidable, all trenching shall be done using directional boring, air-spade excavation or by hand,
taking extreme caution to avoid damage to the root structure. Wor1c within the dripline of existing trees shall be supervised at all times by a certified or
consulting arborist.
(h) It shall be a violation of this division for any property owner or agent of the owner to fail to comply with any development approval condition
concerning preservation , protection, and maintenance of any protected tree.
(Ord. No. 2114, §§ I, II, 8-4-03)
Sec. 29.10.1005. Protection of trees during construction.
(a) Protective tree fencing shall specify the following:
(1) Size and materials. Six (6) foot high chain link fencing , mounted on two-inch diameter galvanized iron posts, shall be driven into the ground
to a depth of at least two (2) feet at rio more than 10-foot spacing. For paving area that will not be ,demolished and when stipulated in a tree
preservation plan, posts may be supported by a concrete base.
(2) Area type to be fenced. Type I: Enclosure with chain link fencing of either the entire dripline area or at the tree protection zone (TPZ), when
specified by a certified or consulting arborist. Type II : Enclosure for street trees located in a planter strip: chain link fence around the entire
planter strip to the outer branches. Type Ill: Protection for a tree located in a small planter cutout only (such as downtown): orange plastic
fencing shall be wrapped around the trunk from the ground to the first branch with 2-inch wooden boards bound securely on the outside.
Caution shall be used to avoid damaging any bark or branches.
(3) Duration of Type I , II, Ill fencing. Fencing shall be erected before demolit ion , grading or construction pennits are issued and remain in
place until the work is completed. Contractor shall first obtain the approval of the project arborist on record prior to removing a tree protection
fence. ·
(4) Warning sign. Each tree fence shall have prominently displayed an 8.5 x 11-inch sign stating: 'Warning-Tree Protection Zone-this fence shall
not be removed and is subject to penalty according to Town Code 29.10.1025".
(b) All persons, shall comply with the following precautions:
(1) Prior to the commencement of construction , install the fence at the dripline, or tree protection zone (TPZ) when specified in an approved arborist
report, around any tree and/or vegetation to be retained which could be affected by the constructiol'.l and prohibit any storage of construction
materials or other materials, equipment cleaning , or par1cing of vehicles within the TPZ. The dripline shall not be altered in any way so as to
Sita Addrw11: 15880 Gum Tree~. LOI Glllol, CA
R•gt '*9d Member, Ar11911cen Sodety or eor.Allng Altlortats •nd Member ot the 1ni.m .. ona1 Soaety or MMwlW!tn
o Wfll« l.M4lon 2018 Al ~ ReMl\led
ZDof38
Verwlon: 712112018
~h Walter Levison r CO N S U L T ING ARBORIST
&\
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ASCA Registered Consijtjng Arborist ..W1 / ISA Tree Risk .Assessment Ouarrfied / ISA Certified Art>orist tWC-3172 eel (415) 203-0990 I drtree@sbcglobal.net
increase the encroachment of the construction .
(2) Prohibit all construction activities within the TPZ, including but not limited to: excavation, grading, drainage and leveling within the dripline of
the tree unless approved by the Director.
(3) Prohibit disposal or depositing of oil, gasoline, chemicals or other harmful materials within the dripline of or in drainage channels, swales or
areas that may lead to the dripline of a protected tree.
(4) Prohibit the attachment of wires, signs or ropes to any protected tree.
(5) Design utility services and irrigation lines to bo located outside of the dripline when feasible .
(6) Retain the services of a certified or consulting arborist who shan serve as the project arborist for periodic monitoring of the project site and the
healh of those trees to be preserved. The project arborist shall be present whenever activities occur which may pose a potential threat to the
health of the trees to be preserved and shall document all site visits.
(7) The Director and project arborist shall be notified of any damage that occurs to a protected tree during construction so that proper treatment may
be administered.
(Ord. No. 2114, §§ I, II, 8-4-03)
Sec. 29.10.1010. Pruning and maintenance.
All pruning shall be in accordance with the current version of the International Society of Arboriculture Best Manag1::tment Practices-Tree Pruning
and ANSI A300-Part 1 Tree, Shrub and Othe r Woody Plant Management-Standard Practices , (Pruning) and any special conditions as determined by the
Director. For developments, which require a tree preservation report, a certified or consufting arborist shal be in reasonable charge of all activities involving
protected trees, including pruning, cabling and any other work if specified.
(1) Any public utility installing or maintaining any overhead wires or underground pipes or conduits in the vicinity •:>f a protected tree shall obtain
permission from the Director before performing any work , including pruning , which may cause injury to a protected tree. (e.g. cable TV/fiber optic
trenching, gas, water, sewer trench, etc.).
(2) Pruning for clearance of utility lines and energized conductors shall be performed in compliance with the current version of the American
National Standards Institute (ANSI) A300 (Part 1)-Pruning, Section 5 .9 Utility Pruning. Using spikes or gaffs when pruning, except where no
other alternative is available, is prohibited.
(3) No person shall prune, trim, cut off, or perform any work, on a single occasion or cumulatively, over a three-year period, affecting twenty-frve
percent or more of the crown of any protected tree without first obtaining a permit pursuant to this division except for pollardlng of fruitless
mulberry trees (Moros alba) or other species approved by the Town Arborist. Applications for a pruning permit shall include photographs indicating
where pruning is proposed .
(4) No person shall remove any Heritage tree or large protected tree branch or root through pruning or other method greater than four (4) inches in
diameter (12.5" in circumference) without first obtaining a permit pursuant to this division.
(Ord. No. 2114, §§ I, II, 8-4-03)
Sllll Add11111: 151580 Gum Tree Lane , Los Galos, CA
Reglltered ...,._, Amlllc.n Soc:iety of~Alballlll Mid Memberoflhe ••1iilla181 Sodety "-~
e Wllfllr l.JMaon 20fll Al~ Re111M1d
IfOfS8
Ver11on: 7121fl018
~jh Walter Levison rl CONSULTING ARBORIST ~~
I ·-~" •MC• ___ .....
ASCA Regi stered Consufting ArtJortst #401 / ISA Tree Risk A81essment Qual ified / ISA Certified Arborlst tNVC-3172 cell (415) 203-0990 I drtreeOsbcglobal.net
8.0 Tree Replacement Standards -Los Gatos Town Code
(Excerpted from Town Code 29.10.0985 and 29.10.0987)
(1) Two (2) or more replacement trees , of a species and size designated by the Director, shall be planted on the subject private property. Table 3-1
The Tree Canopy._Replacement Standard shall be used as a basis for this requirement. The person requesting the permit shall pay the cost
of purchasing and planting the replacement trees.
(2) If a tree or trees cannot be reasonably planted on the subject property, an in-lieu payment in an amount set forth by t he Town Council by
resolution shall be paid to the Town Tree Replacement Fund to:
a. Add or replace trees on public property in the vicinity of the subject property; or
b. Add or replace trees or landscaping on other Town property; or
c. Support the Town's urban forestry management program. (Ord. No. 2114, §§ I , 11, 8-4-03)
Table 3-1 -Tree Canopy-Replacem-ent Standard
I I I (Staff Is using 24" box size as
I Canopy Size of Removed Tree 1 I the Replacement Standard for
SFR Projects as of 2016) 2 •4
1 O feet or less
More than 10 feet to 25 feet
More than 25 feet to 40 feet
More than 40 feet to 55 feet
Site Adlha: 15080 Gum Tree~. Loe Gltol, CA
Regilthd Memler, Amertc3n Society of CanN9ng Mlona1a Ind Member of !he ll'lllmllionll Sodety of AltlorkUlln
0 W e/IM Lw.on 201 6 M Ri1t11S R-*
Two 24 inch box trees
Three 24 inch box trees
Four 24 inch box
trees; or Two 36
inch box trees
Six 24 inch box
trees; or Three
36 inch box
trees
22 0'38
Si ngle Fa mily
Resident ial
Replac e ment3 •4
---
Two 15 gallon trees
Three 15 gallon trees
Four 15 gallon trees
Not Available
vnon: 11211201s
~h Walter Levison rl CONSUL T I NG ARBORIST M\ .. ~~~~: ..
ASCA Registered Consulting Arborlst ..-01 /ISA 7ree RISk Assessment Qualified/ ISA Certified Arborist #WC-3172 cell (415) 203-0990 I drtree@abcglobal.net
Greater than 55 feet
Ten 24 inch box
trees; or Five 36
Inch box trees
Notes
Not Available
1To measure an asymmetrical canopy of a tree, the widest measurement shall be used to determine canopy size.
2otten, it is not possible to replace a single large, older tree with an equivalent tree(s). In this case, the tree may be replaced with a combination of
both the Tree Canopy Replacement Standard and in-lieu payment in an amount set forth by Town Council resolution paid to the TC>'t"ln Tree
Replacement Fund.
3Single Family Residential Replacement Option is available for developed single family res idential lots under 10,000 square feet that are not
subject to the Town's Hillside Development Standards and Guidelines. All 15-gallon trees must be planted on-site. Any in-lieu fees for single
family residential shall be based on 24• box tree rates as adopted by Town Council .
4Replacement Trees shaft be approved by the Town Arborist and shall be of a species suited to the available planting location, proximity to structures ,
overhead clearances, soil type, compatibility with surrounding canopy and other relevant factors. Replacement with native species shall be strongly
encouraged. Replacement requirement& in the Hillsldes shall comply with the Hillside Development Standards and Guidelines Appendix A and
Section29.10.0987 Special Provisions-Hillsides.
Sec. 29.10.0987. Special Provisions-Hillsides
The Town of Los Gatos recognizes its hillsides as an important natural resource and sensitive habitat wh ich is also a key component of the
Town's identity, character and charm. In order to maintain and encourage restoration of the hillside environment to its natural state, the Town
has established the following special provisions for tree removal and replacement in the hillsides:
(1) All protected trees located 30 or more feet from the primary residence that are removed shall be replaced with native trees listed in Appendix A
Recommended Native Trees for Hillside Areas of the Town of Los Gatos Hillside Development Standards and Guidalines (HDS&G).
(2) All protected trees located within 30 feet of the primary residence that are removed shall be replaced as follows:
(a) If the removed tree is a native tree listed in Appendix A of the HDS&G, it shall only be replaced with a native tree listed in Appendix A of
thaHDS&G.
(b) If the removed tree is not listed in Appendix A, it may be replaced with a tree listed in Append ix A, or replaced with another species of
tree as approved by the Director.
(c) Replacement tllM!S listed in Appendix A may be planted anywhere on the property.
(d) Replacement trees not listed in Appendix A may only be planted within 3Q feet of the primary residence .
(3) Replacement requirements shall comply with the requirements in Table 3-1 Tree Canopy Replacement Stand;aird of this Coda.
Site AddteH: 1591111 Gun T-Lane, Lot Gato., CA
ReglsMred Melnler, Amlric:.rl Sodely otConUlngAlbarl9la -M«n111r of the~ Sodely ct Arborlaan
o 'l\'lllllr LMorl 2018 M ~ R.--1
23 cllS8'
Venion: 712112016
~jh Walter Levison rl CONSULTING AABORIST M\
··=::-:.:.!T:.:.~~-
ASCA Registered Consulting Arbortst '401 I ISA Tree Risk Assessment Qualmed / ISA Certllled Arborist tNIJC.3172 cell (415) 203-0990 I drtree@sbcglobal.net
(4) Property owners should be encouraged to retain dead or ·declining trees where they do not pose a safety or fire hazard, in order to foster wildlife
habitat and the natural renewal of the hillside environment.
9.0 Author's Qualifications
• Continued education through The American Society of Consulting Arborists, The International Society of Arboriculture (Western Chapter), and
various governmental and non-governmental entities.
• Contract Town Arborlst, Town of Los Gatos, California
Community Development Department I Planning Division
2015-present
• Tree Risk Assessment Qualified (ISA TRAQ Course Graduate, Palo Alto, California)
• Miiibrae Community Preservation Commission (Tree Board)
2001-2006
• ASCA Registered Consulting Arborist #401
• ASCA Arborlculture Consulting Academy graduate, class of 2000
• Associate Consulting Arborist
Barrie D. Coate and Associates
4199-8/99
• Contract City Arborlst, City of Belmont, California
Planning and Community Development Department
5199-present
• ISA Certified Arborist #WC-3172
• Peace Corps Soil and Water Conservation Extension Agent
Chiangmai Province, Thailand 1991-1993
• B.A. Environmental Studies/Soil and Water Resources
UC Santa Cruz, Santa Cruz, California 1990
(My full curriculum vitae is available upon request)
Sita Addl911: 1eeeo Gum TAlll '--· Los Gmlos, CA
Registered Menmer. Anwlc.n SocHty of COIWUlling Arbor1m Md Member of the~ Soct.ty at Allxlrlallln
o Wiiier Lr;t_.. 2018 NA ~ R...-1
24of38
Venllon: 7121/Z018
~jh Walter Levison rl CON SU L TI NG ARBORIST ~\
.~~-
ASCA Registered Consuking Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist twe-3172 cell (415} 203-0990 I drtree@sbcglobalnet
10.0 Assumptions and Limiting Conditions
Arr/ legal deaatption provided to the consultant/appraiser ia auumed to be correct. Art/ tides and ownership to any property are assumed to be good and marketable. No responslbil"dy Is assumed
for matters legal In character. Any and all property Is appraised and evaluated as through free and clean, under responsible ownership and competent mana,JtlfTlent.
It Is assumed that any property Is not in violation of any applicable codes, ordinance, statutes, or other govemment regulations .
Care has been taken to obtain all infonnatlon from rellable soun:es. All data has been verified insofar as possible; however, the conslAtant/appraiser can neither guarantee nor be responsible for
thl~ accuracy of information provided by others .
The consultant/appraiser shall not be reqlired to give testimony or to attend court by reason of this report unless subsequent contractual arrangements are made, Includ ing payment of an
additional fee fOr such services as described In the fee schedule and contract of engagement
Unless required by law otherwise. the possession of this report or a copy thereof does not imply right of publication or use for any other purpose by any other than the person to \\tlom It is
addressed, v.ntttout the prior expressed written or verbal consent of the consultanVappraiser.
Unless required by law otherwise, neither all nor any part of the contents of this report. nor copy thereof, shall be conveyed by anyone, including the client, to the public through advertising , public
relations, news, sales, or other media. without the prior expressed conclusions, Identity of the consultant/appraiser. or any reference to any professional society or institute or to any Initiated
designation conferred upon the cons!Jtant/appraiser as stated in his qualifications.
This report and any values expressed herein represent the opinion of the consultant/appraiser, and the cons!Mant's/appraiser's fee Is In no way contingent upon the reporting of a specified value , a
stipulated restJt, the occurrence of a subsequent event, nor upon any finding to be reported.
Sketches, drawings, and photographs in this report, being ir.tended for visual aids, are not necessarily to scale and should not be construed as engineering or architectural repor1s or surveys
unless expressed otherwise. The reproduction of any Information generated by engineers, architects. or other consultants on any sketehes, drawings, or photographs Is for the express purpose of
coordination and ease of reference only. Inclusion of said Information on any drawings or other documents does not constitute a representation by Walter L~son to the sufficiency or accuracy of
said information.
Unless expressed otherwise:
a. Information contained In this report covers only those Items that were examined and reflects the conditions of those ~ems at the time of inspection; and .
b. the lnspedlon Is limited to viSual examination of accesalble Items IMthout dissection, excavation. probing, or coring. There Is no warranty or guarantee, expressed or Implied, that
prc•blems or deficiencies of the plants or property In question may not arise in the Mure.
Loss or alteration of any part of this report Invalidates the entire report.
Arborist Disclosure Statement:
Arborlsts are tree specialists \\tlo use their education, knowbdge, tra ining, and experience to examine trees, recommend measures to enhance the beauty and health of trees, and attempt to
reduce the risk of living near trees. Cllenbs may choose to accept or disregard the recommendations of the art>ortst, or to seek additional advice.
Art>orlsts cannot detect every condition that could poaslbly lead to the structural failure of a tree. Tree are llVing organisms that fall In v.eya we do not fully understand. Conditions are often hidden
within trees and below ground. Artlorist cannot guarantee that a tree will be healthy or safe under all circumstances, or for a specified period of time . Likewise, remedial treatments, like any
medicine, cannot be guaranteed.
Treatment, pruning, and removal of trees may involve considerations beyond the scope of the arborist's services such as property boundaries, property ovmershlp, site lines, disputes betv.een
neighbors, and other issues . Artlorists cannot take sueh considerations Into account unless complete and accurate information Is disclosed to the arborlst. 1\n 81t>orist should then be expected to
reasonably rely upon the completeness and accuracy of the Information provided.
Trees can be "lanaged, but they cannot be controlled . To live near trees is to accept some degree of risk. The orq way to eliminate all r11k associated with tNes Is to eliminate the trees.
Site Addn1Ss: 15680 Gum Tree Lane, Loa Gatoo. CA
Reg stered Member, Amactcan Society or Consutlng Alborlsts and Member or h l.ntamalianel Society ~ ArbollClllure
c Waller Levison Z016 All Rights Rea8N9d
2! or38
Veraion: 7121/201 8
~jh Walter Levison rl CONSULTING ARBORIST
M\
.-~:.:·:.:..~~~-:...
ASCA Registered ConauHlng Arbortat fM01 / ISA Tree Risk Assessment Qualified / ISA Certified Arborlst MC-3172 cell (415) 203-0990 I drtree@sbcglobat.net
11.0 Certification
I hereby certify that al the statements of fact In this report are true, complete, and correct to the best of my kno'Medge and belief, and are made in good faith .
SlgnatureofConsuttant ~
12.0 Digital Images
WLCA archived images of survey trees on 7/112016. The following is a set of images that covers some (not all) of the survey tree specimens discussed in this
CTAreport
Tree# lmaae
1
Sile Ac*hla: 15680 Gwn Trae '--. Loi Galo1, CA
Reglllered Mlmber, American Sodely or Conadtno MIO!lsts Ind Mentiar or Ille lntematlOnlll Society of Arbollcultunl
e Wf/IM Le.iaon 2018 All Rlghla Re..wd
Tree# lmaae
... =>I
2
26of38
Version: 7121/2018
~h Walter Levison rl CONSULT I NG ARBORIST
ASCA Registered COnsUltiJlD Arborlst -..01 / ISA Tree Risk Asaesament Quallfled /ISA Cerlfled Arborist twe-3172
Tr-ee#
LtoR
3,4,5
12
Sit. Addra11: 1M&O Gum ll'INI L-. Loe Gmos, CA
__ ...
Regilttfed Menelr, ~ Sodely cl ~Altllllla1l Md~ cl !he ll'lllmll011111 Society ti! AtboriaAn
C Wtlbr Lwson 2018 M ~ R8AIWCI
Tree#
LtoR9
& 10 to be
removed
9& 10
with (e)
road
shown for
pers-
pective
~38
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cell (415) 203-0990 I drtree0sbcglobal.net
Ver11fon: 7121tz018
~jh Walter Levison rl CONSUL TING ARBORIST
ASCA Registered Consuttl~ Arborlst #401 / ISA Tree Risk Assessment Qualified / ISA Certified Arborlst MC-3172
Tree#
RtoL
19,
20,
21 ,22
25
5119 Add111s.: 15l!eD Gum Tree Lane, Loe a.toe, CA
e
Regittaled MerNier. Anwtcwo SocHty of Coneullng AlbO!illa and Member of Ille Int~ SocHlly of MlcrtaAn
c Wahr Lftlton 201 &,,, ~ R--i
Tree#
Rtol
23,24
26
2Sof38
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oen (415) 203-0990 I drtree@sboglobal.net
lma!le
V9111ion: 7121/2018
~jh Walter Levison r CONSULTING ARBORIST
ASCA Registered Cons~ Albor1st "'401 /ISA Tree Risk A:iSesament Qualfied I ISA Certified Arbori&t MC-3172
Tree#
30
---~·-·
Sita Addraas; 15lle0 Gwn T11111 Lane, Lo• Gmlo•, CA
Rlglalenld Merrlllr, Anwtcan Society of Conlulllng Mlolttb Ind MenCMlr ol h lnl9mdarwl Sodety Of AmoltaA.Tll
e Wiiiiar Levison 2016 All Righla R-*
Tree#
31
29ol38
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V1'11on: 7121121118
..
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,
2
3
4
5
~jh Walter Levison rl CONSULTING ARBORIST
ASCA R~istered Conaultl119 Alborist "401 /ISA Tree RiSk Assessment Qualified/ ISA Certifted Arborist tA'VC-3172
13.0 Tree Data Table
... .. .. Jlt f al • • ~ I I c c I ~i= I
::I ,.,
Owrall .. c ~:c e a ~ ..... Genus& Convnon
,._
Condition .s5 • •u • = I! u..: -u
Specie• Name Ci ~I Ill!!;. .. I! " Rdng £_j•fi ... ~ Sl l!!"r::I ::illl
u·3f!'" .Ill 5-ll! (Oto 100%) c c c EE tl -20 !: ~: ! ~ i! ~ ::i.!! :o;o ..... llJC :J:fl) :J: :::. ...11-lt.a 11)
Quen:us Blueollk 31.7 -31 .7 351 35135 35%poor YES douglnil -45
Quen:us 30/
lobat. Valley oak 19.5 --19.5 30 65/tl5 85% fair
Quen:us Coastliw 15.' 5.6 --5.8 90/80 88%good egrifo/ia oak 9
Quen:ua Coaetliw 10 10 20 25.' 80i'80 75%good agrlfoHa oak -25
Quetcll$ Coaatliw 131
•(lrifolla oak 5.0 --5.0 s 75175 75%good
30of38
Site Acklrtss: 15680 Gum TIM i..n., Los Gelot, CA
Registered Member, American Society of Ccnullng Altxxllls 911C1 Member of the intam111DIWI SoCiely Of~
C Wlllter L...taon 2018 All ~ Relll!Vlld
I ~
x
x
x
x
x
.A~
eel (415) 203-0990 I drtree@sbcglobal.net
J11 ~c -c fl) w
i .2 0 ~ i zii!
u I c c= .. §~ ~ 11 ~ 8 iJil
w -~ t; f 1.! !I·-al ~ ~ fl) "r::l"r::I ..ll!"r::I .E Ii ~ ..... ~rJ i• Zoo~ iii c; I e1goz"":' 0 1) 2c ~~f 8 _,,s. ..... -mu ~~ll:lf ~
A hiallDliclllly
perfonned
Minor to root crown
moderllllt, excavation
went too far PerCTA'a depending on South down, mapln1hi1 RPZ, TB rvotdamage
from 8'q)Ollng the report.
proposed ftD. actual roots ,
Mulling In
auntcald
damaoe.
PerCTA's
Minimal. map ln1hls RPZ
report.
Tree not
noted on the
applicanfa ParCTA'I
Mlnl11111I. plan aheelB. map In this RPZ
Rough report.
plotted by the
CTA.
Fil soil wiU be ParCTA'a M inimal to placed on m1p inthi• RPZ moderatlt. north aide of
the root zone. report.
r ... not
noted on th•
applicanra
plan sheets.
Rough
plotted by the ParCTA'I
Modanste CTA. North map in this RPZ
aided root report.
zone will .be
completely
covered with
newfin per
man.
varwton: 112112018
..
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~
7
8
.__
9
~Jh Walter Levison r CONSULTING ARBORIST
ASCA Registered Consutting Arborl1t "'401 / ISA Tree Risk Assessment Qualified / ISA Certified Arbor1st #WC-3172
~ ! .. i .... r;: !'
I !! c g 1~ I 111 ~ Ovlrall • i J I c:!i Condition ~~111! Gena& Conman ~I .. '!~ i5 .. -Rmttng ...... Nmne SI ~ !1 ~1~ (0to100%) lii c .21! J!~lii c c
i! ~.!!! • 0 ~ i! • Q, :! ~ .... .... (l)Cli :c II)
Quetws Coast live 5 20 2Q( 90/50 70%good a 7 15 ~ Oltk
20/ Quon:us Coeetllw 4.B 4.2 -9.0 15 80.465 77%good agrffo/11 oak
20/ Quon:us COllllt live 8.9 5.3 -14.2 17 75f75 76%good 1gr.lfo/l1 oak
Calfomia 161 80/40 55% fair x Helen>melea 7.0 4.0 -11.0 atbu6fol• tayon 12
31 ol3B
Sik· AddreH: 158llO Gun Tl'M Lane, Loe Gmlot, CA
R91jistered Mentis, Amlllc:ml Society of c-.n._ ArbClllat. and Meniler of tile ll'llemlloMI Society or ArbortaAtl.n
c WllttK LtMIOl'I 2DUI Al~ Rearwd
I
x
x
x
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cell (415) 203-0990 I drtree@sbcglobal.net
~hi ~-I -m r.: ~c c t 1 Cll zii! i ~-0 j ~~ Iii IJll
w 11 !ti Ill: f 111 !I-al -~ .... ~~ '.SI! 'Ill .,_v c I~ Zc5§ Ill c. 'E gg~ttj:> j~f .§J Ill: i! -0 tnlll:D.IL~ .Ss t-S (; mu
Codomfnant
mainatems
e>Chibit II barlt Model'lllte. lncluelon at 1 The plot point root ave ofthlltnlll grade. appMrsto be
incorrwct. Rooteyatem PerCTA's Actual trunk maybe rmplnlhill RPZ location may damaged or report badoearto destroyed on exltting road 1he nor1h side than Is shown by proposed on the deep fill that appllcanrs wtll CO\lftr the •haell. •hallow
oxygenatmd
root1vsl8m. -The plot point Rootayatem ofthlstnte maybe appaarstobe damaged or inoorTect. destroylld on Actual trunk the nor1h aide PerCTA'1 location may by proposed map In this RPZ bedoserto deep fill tllllt l9port. a>dltina road wlll CCM1r the than l11hown •hallow ontha oxygenated appllcanrs root system. sheets.
The plot point Rootsys1em of this tree maybe appears to be damaged or incorrect. destroyed on Actual trunk lhe north side PerCTA's location may by proposed mapln1hl1 RPZ be clOHrto deep fill that l9pOrt. axllltlng road wll cover the than la 1hown ahlllow on the oxygenated applicanh root sys1em. •heels •
Tobe -l'lllTIOVed. -
-·-
Venion: 7121/2016
..
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10
11
12
~h Walter Levison r CONSULTING ARBORIST
ASCA Registered Consulting Arborist #401 /ISA Tree R isk Assessment Qualified/ ISA Certified Arborlst twC-3172
.. .. .JC &: ~ •
~ i i c l ~ ::J 0 !:c I i e I ~ ~~ Overall ts ,, ,, I .! ...... c c Genus& Ccmwnon .! -t!! -u Condltfon .... • •u
$plCIM Nmne i5 a Ci ~ .! .. i=. '° I! ii! Rattng £~.a .t ! l;i SI! ... O• 11 i~at! (Oto 100%) .JC .... o.o.e e .. c ~ c §j .~g J!~!I~ C! ~ ~: .... U>C :z: vs :c.
Que rcua Coestllve 5.7 -5.7 161 SOl80 80%flllr x agtffolla oak -12
Quen:us 25/
douglHll Blueo11k 15.3 --15.3 35 30130 30%poor
Quan:u& Coastllve 30 20 18 ao 3Qf 75135 43~poor YES ~ oak toi.I 45
32 gf38
Site AddrH1; 1S680 GUm TIM i.-, Loi Glloe, CA
Reglltw9d Mlmber, American Sodely rA Carwullng Arbor111s 8lld M..mw rA the lnl8mmlioMI 5oclely rA Alballc:IAll'e
o WrllM l.evllon 2016 Al Ri1i11s R..,-,,.d
11
x
x
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~hi ic ...... II) ~ c ~ ! z2 Co 0 0 u! '111 Ii ts 8 oo & HII ~ fi~ Iii I 'i~ ~~ 11:9 a:
'1::11'1::1 .JC '!::I .5 ~I ~ .... !!!~ &· c~ 'E gg~ifi:! 0 15 C! c ~~f8 ...r .s. .... -c::; mu 11>a:o..""!:.
Tobe -remOYed. -
Needs root
crown
exc11Y.tlon.
Sugge.t RPZ, RCX.
and locate relocate th• PerCTA's the d,.in pipe Minor to proposed
mode...te South x outfall for the map in this outfall to
storm drain report. farther from
such that the the trunk
rock pile is bue.
farther from
the trunk or
thi• tree.
Tree appears
to be a sprout
maAth.t
arose from a
cut stump.
The entire
canopy
conllis11of
these sprouts RPZ, and do
arising from a PerCTA's not buUd any
Minor South •tumpcut map in this aitling areas
anNL Thia is within 45 feet
a high risk report. ormainsmm
tree(donot mau.
in•td any
sitting areas
onto the
landacape
within 45 feet
oftha
mainallltm
duster.
v.nlon: 712 1/2018
.. J
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13
14
15
18
17
18
~}h Walter Levison rl CONSUL TING ARBORIST
ASCA Registered Cons ulting Arborist '401 / ISA Tree Risk Aasasarnent Qualified / ISA Certified Arborist MC-3172
.. .IC t Q • i I j c c 'a ~
2 s, ii' I owran I "a"'I Qenu1& common .i i i I-Condition ~Jf i ~ 1 ~i SptelM N1111e Cl i1 .. i!!.11 Rlflng
i SI S',I 5 il ll'! (Oto 100%) •eo-z e .. c c E~ -cc ~!~il~ ~ 2 c ~s :! .t Ilia I-I-:c :!":.
Qu.,n:us Est. Est. 351
tJtx.•glNii BlueClllk 18 --18 28 35136 35'111 poor
Qu.tlCUll 351
loUata Valley oak 18.2 --18.2 .c5 80/80 80%good
Quen:ua 3111 ,,,,,.,. Valeyoek 10.5 - -
10.5 15 70#45 57%fair
Quitn:us 20I
/oNll V-'eyoak 11.9 11.8 -23.5 25 110/85 75%good
QucllWS 281
Ioli.fl! v.leyoak 8 --8 13 W..6 55%fllir
Quen:us Coast live 7 7 -Est. 3111 80/75 78%good agrlfo/la oak 14 35
-
33 Ol!B
Sit. Add,.H: 15880 Gum Tree l.lnw, Loe GCos. CA
R91~1tere<1 Mentier, Anwtcan Society or CcnNlng Albaltats lllld Member or the ~ONll Society ti Arborlctftn
Cl Wllllr i..Aaon 20111 All~ Rn«wd
I
x
x
x
x
x
x
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I t_ ~ co i 1. Oc c t I z2 ~all ~t !I Cl
~ g
11!1
~ ~~
1111
1 ._ r 1Z:
!! 'a .IC 'a ·s I ~~I!!~ ~co~ ,. c• ~ 'C Cl Oz~ .9! 215 (5 :::s ~~f ~~ ~~f8 I-.s. IDU
·-
Tree could
improve In RPZ , and vtgorwilh PerCTA's once montllly 1xlmonlh Mi nor deep wnter at meplnlll• tn1glltlon
25feetout l9pOft. w.terat25
from feetoul
malnstem.
; Needs root
c:tOWn
excavation .
F'erCTA's
Moderate x Work map In thia RPZ, RCX.
propo1ed is l9pOft.
rellllvely
dose lo
malnsmm.
PerCTA's
Mi nor ir.ap in this RPZ
report.
Larve rodent PerCTA'I
Minor tunnel at maptnlllll RFZ
baseof1ree. reporl
South PerCTA's
Minor eut map lntlil RPZ
l9pOft.
Condition
llHlled Per.CT.A's
Minor from afar. map In Ills RPZ Mainetem l9pOft. dlamars
estimated.
Vlniort 7/.l1/2016
.. .!
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19
20
21
22
23
24
~jh Walter Levison rl CONSULTING ARBORIST
ASCA Registered Consulting Arborlst 1401 I ISA Tree Risk Assessment Qualified / ISA Certtned Arborist MC-3172
i I .. ... t Ill • .. I c c i ~:. ~ 0 l:c Ov.rall I .! j i c ·-i5 -~!·i Genue & Conwnon Uit Condition -I! -u
Spec lea N8me a a ~s ..,_ .. I!. Rating
II: ~ !;l O• -~ =i~ (0to100%) Ii: -t "e • c ~ c Ei j~ •<'" ... ..
120 J!~fil i? 2 :I ·-• Q, _o
I-... ma :c In In:!:::.
Quen;us Coutlive 251
agrifolia oak 19.2 --19.2 35 50/50 50%falr
Quen:u.s Coast live 30/
agrifolia oak 20.3 --20.3 30 40/30 35%poor
Quen:ua Coast 11119 30/
•f1tffoli• oak 14.7 --14.7 25 70/85 70%good
Total Quen:us Valley oak 25 18 10 est 251 40/30 38% poor YES /oballl 51 40
Quen:us Vr&eyoak 15.5 14.5 -30.0 SOI 50/25 3Q'I' poor YES lobeta 35
Quen:us 251
lob•ta VaHeyoak 11.0 --11.0 20 75175 75% good
3411'38
Site Addrws: 15e80 G\1'11 Tl'ff i.-. loll Gatoe, CA
Regllttred M.,,,.,.,., Amellcmn Sodely of Conelftng Mloriltl Ind MelTber of the lnten.llonll Society Of Mioric:Uture
0 W.._, Leo.ilon 2018 All Rlghla R.-wd
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x
x
x
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cell (415) 20~990 I drtree@sbcglobal.net
.hJ ~--rn w ~c § i l z:! IJ~ II 0 a uJ c; §~ i) iJfi
Ill
ii:: & ti t1•1 'i-Ill ~~ j-: c l~ ~ .... !!!~ i• ~ e>goz"":' J1! .3l ... ! i3 ~ii::G:~~ ~f 8 lllU
Root crown PerCTA's Minor to excavation
modeme wa1done mapin1his RPZ
well. report.
Bark PerCTA'I
Minor South lnduslon at 7 map in this RPZ
faet. RI port.
Root crown
excavation
done well P9f'CTA's
Minor aln1ady. SQlr mapinthi• RPZ
noted •t4 to RI port.
5 feet above
arade.
One of 4 malnstems -n1moved at grade.
Thnie main9teme remain. Canopy consists or PerCTA's
Minor eplcormlcs sprouts arising from the malna•ms. map Ill this RPZ Tree is slowly improving with Increased live twig report. density and exten1ion, • • "retrenched'
specimen .
Root crown
decay on PerCTA's
Minor South tower llllPin thil RPZ (downhill)
aide of report.
main1111m.
Need1root PerCTA'I
Minor x crown map In this RPZ, RC X
9)(1)8Yatlon. l'9f'Orl
\man: 712112018
.. .a
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25
26
27
28
29
~h Walter Levison rl CONSULTING ARBORIST
!::,>CA Registered Consulting Arborlst t401 /ISA Tree Risk Assessment Quallfled / !SA Certified Arborist A'VC-3172
.. ... .. ~ t al • .. I .! I c c "D ..,
~ ~l l:c i fl!. I
• OYlrlll
01r1u•& Common i I I Condition j5 i5 ~I!! .. 1~ l~iitl 8PftCllM Nun1 ..... R.tlng
lji S':! SI 'SI l!1 ~ ~ (0 to 100%) •«'-!~E! .. c: c c: i! ·i'~ E!I I• ""D .! ~ C! ~ I :so !!11-~jlo .... (/)Q :l:CI') :CtO~
Quon:us Coutllve 3111
artoll• oak 24 22 -"' 40 75175 75%good YES
Quen:w Blue oak 15.3 15.3 29/ 70f70 70%good dougtff/I --25
Qut•n:u• 30/
/otlta V.Tieyu.1k 11.7 --11.7 25 80l70 75%good
Q!Mrcu& Blue oak 9.9 9.9 29/ 80/80 60% fair douf'Jlallii --25·
(CONTROL
POINT)
Wllf3B
Site Addr9H: 1!!880 Gun Tree ~ne. Los Gmoe, CA
Reglttenld Member, An.an SocHty Of~Alballlla and Ment>er otthe kmm11IU1Mll Society Of ArbonUiAn
OVI ..... LtMson.2018/11 ~ ~
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cell (415) 203-0990 I drtree@sbcglobal.net
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c:i ! 1111 ~ ~! 11! GI: !c o ~ 1111 ~-1111 'D ii ~'1::1 c: I~ w ~ ...
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Root crown
excava.tlon
don• already
llOK.
Modendeto Eidstlng Yunk PerCTA'a NEW TB ,
Severe buffer wrap mmpln this RPZ
was not done report.
correctly, and
llhould be
removed and
redone.
Root crown
ucavetlon
(lmp1cta noededto
remove nil PwCTA'I relllled ID x toft placed map lnthll RCX, RPZ past road behind wall report. development) during road
development
In lhenaat
South PwCTA'I
Mod81"11te over m• 1111111 RPZ
street report.
Stem cankers
are P•CTA'•
Moderate developing ITll!IP ln1hl1 RPZ notlce1bly on
one or two report.
atem1.
Venlon: 7r.?1r.!018
J
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30
~jh Walter Levison rl CONSULTING ARBORIST
A~ ~~
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ASCA Registered Consulting Arborlst "'401 / ISA Tree Risk Assessment Qualified / ISA Certified Arborist Mc-3172 cell (415) 203-0990 I drtree@sbcglobal.net
Genus&
Spec:IH
Qu91W.S
lobata
Conman
Name
VaDeyoak
....
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i5
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18.3
Sita AddN11: 15680 Gum TIN L-, Loi Galas, CA
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16.3
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tl
30/
35
r
~:E' -u
Ill I! .:I
ill
eono
Ow ml
Condition
Reing
(Ota 100%)
78%good
ii. I
J. i: "11 if.~~l r t...1..Df.!a. j ~~f2~ ~c: u-a • ... ~.! ei1 .
3&ol38
R~ M ....... AmlliQl'I SacieCy at Coneullng Alballsts end Memller Of Ille lnt91TW11onm SocieCy Of ArllCliQAn
o WflllM Leviaon 2018 Al Rlghla ~
x
. ~hi I ft·i . !1!~
Moderate to
Severe
t o-c C: • .2 01:;
i~ :!ii,, Ji
South
-cf ~-.IC ,,
~i ... _
i a:
Clll c ~
iii
!
~I mu
x
I
illl
Root crown
exx:.vltlon
needed.
Proposed
-19rlin•
trench and
thepropOMCI
storm d11111l
lin•trench
maycauH
nvereroot
lou at the
north &Ida of
root zone If
cut along
current
propoled
lllignment.
Recommend
reroute the
propo1edtMI
1nlnches, or
UM
directional
bore to avoid
trenching
en
a z2 w QCll
l;; t;~
W WW g~b~""7' ~if~~
PerCTA's
map in this
report.
Ynon: 712112018
g z
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RCX. TB,
RPZ. RP, and
1x/month
-ierc1eep1y
ufarout
from
mainstem as
possible.
Reroute
-terllne
trench and
storm d111in
line trench, or
UH
directional
bore Instead
of standard
trenching
method.
j
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!
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31
~Jh Walter Levison rl CONSULTING ARBORIST
ASCA Registered Consulting Arborist ;t.401 / ISA Tree Risk Aaaessment Qualllled / ISA Cartilled Arborist #WC-3172
.. .. ~ li: at •
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Genu1I Common ;1 .. ei Condition
8pllC-NmM Cl i1 Plating a. ~1 • c I ~ SI ~ iii~ (Oto100%) c E~ •"" s~1 ..
2 ~ 2 ::I -let le~ ~l~g1! ... ... ft) Cl ..II-A o
Quc1n:us 351 Blueollk 18.8 111.0 12.5 49.3 50/50 50% fair YES x dwglNii 50
V-Of38
Sit. Addre11: 15680 Gum Trw i.-, Loa (;aloe, CA
R~ ...,,._, Anwtc:al1 Sociely o1 Ccndlng Arbcltsl9 Wld Mem!er 111 t1111 \l'lllmlllcnll Soc:lely d AtboriaAn
o l/'ff/.t.r LlllAson 2018 NA ~ta R..-..1
I
J ,1~1
1111
s_..
t_ -sf c
3i !-a ~,, 'i. c•
0 15 20 ... .s. I-.s.
A\
"""'«m:P•9'1it .. ~'I•• .. ··----· ..
cell (415) 203-0990 I drtree@abcglobal.net
fl)
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l&I
1 11 1 In r II:
Ill WW ·z c c,,~1-u ! -~I lea:~ goi~:i'
IQU II) e: II. ... !;.
Tree
condition Is
recovering
ener decline
In vigor from
ex111nded
drought.
Propoaed
construction
wortc will
eurround the
tree, causing
rootlouand PtwCTA'a
root damage maplnthle
llWllllU l9porl
hydrological
dlangHID
most portions
or the tiff's
remaining
root zone In
al directions.
Stair •hollld
oonlfder this
treelD be a
"removal" for
reeou-.
Version: 712112018
.111
1 ! ~ u,,, ca~! ~~f8
RPZ. TB, RP ,
and 1 xfmonth
wate r deeply
as far out
from
mainstemas
po11ible.
Rwtlict
propo11d
wortcc:ut
depths to••
shallowaa
poasible t o
avoid undue
root loss and
root damage.
~h Walter Levison rl CONSULTING ARBORIST
A\
'~~'""..:.-..
ASCA Registered Consulting Arborlst #401 /ISA Tree Risk Asse$sment Quallfled / ISA Certified Arborist #WC-3172 cell (415) 203-0990 I drtree@sbcglobal.net
Tree Maintenance and Protection Codes Used in Data Table:
RPZ : Root protection zone fence, chain link, with 2" diameter iron posts driven 24" into the ground , 6 to" 8 feet on center max. spacing. Alternative material :
chain link fence panels set over concrete block-type footings, with the fence panels wired to steel pins pounded 24 inches into the ground at both ends of each
panel.
RB: Root buffer consisting of wood chip mulch lain over existing soil as a 12 inch thick layer, overlain with 1 inch or greater plywood strapped together with
metal plates. This root buffer or soil buffer should be placed over the entire width of the construction corridor between tree trunks and construction.
RP: Root pruning. Prune woody roots measuring greater than or equal to 1 inch diameter by carefully back-digging into the soil around each root using small
hand tools until an area is reached where the root is undamaged . Cleanly cut through the root at right angle to the root growth direction , using professional
grade pruning equipment and/or a Sawzall with wood pruning blade. Backfill around the cut root immediately (same day), and thoroughly irrigate the area to
saturate the uppermost 24 inches of the soil profile.
BDRP: Back-dig root pruning: Hand-dig around the broken root, digging horizontally into the open soil root zone until a clean, unbroken, unshattered section of
the root is visible. Proceed as per 'root pruning'.
RCX: Root crown excavation. Retain an experienced arborist to perform careful hand-digging using small trowels or other dull digging tools to uncover
currently-buried buttress root flares. Digging shall occur between trunk edge and at least two (2) feet horizontal from trunk edge. The final soil elevation will be
at a level such that the tree's buttress roots visibly flare out from the vertical trunk.
TB: Trunk buffer consists of 20-40 wraps of orange plastic snow fencing to create a 2 inch thick buffer over the lowest 8 feet of tree trunk (usually takes at least
an entire roll of orange fencing per each tree). Lay 2X4 wood boards vertically, side by side, around the entire circumference of the trunk. Secure buffer using
duct tape (not wires).
F: Fertilization with slow-release Greenbelt 22-14-14 tree formula, as a soil injection application using a fertilizer Injection gun. This brand and formulation is
commonly used by reputable tree care companies in the Bay Area. Apply at label rate and injection hole spacing .
M: 4-inch thick layer of chipper truck type natural wood chips (example source : Lyngso Garden Supply, self pick-up). Do not use bark chips or shredded
redwood bark.
W: Irrigate using various methods to be determined through discussion with General Contractor. Irrigation frequency and duration to be determined through
discussion and/or per directions in this report. Native oak species typically require 1x/month irrigation, while other tree species tend to prefer 2x/month or
4x/month moderate to heavy irrigation during construction.
P: Pruning per specifications noted elsewhere. AU pruning must be performed only under direct site supervision of an ISA Certified Arborist, or performed
directly by an ISA Certified Arborist, and shall conform to an current ANSI A300 standards .
MON: A Project Arborist must be present to monitor specific work as noted for each tree.
Site Address : 15880 Gum Tree Lana. l..o1 Gato1, CA
Registered Member. Ame~can Society of Conoulting Ait>onata and Member of th• International Society of AlbortculbJra
o WflllM Lwson 201e All RV* ReaeNl!ld
38 of38
Ver.ion: 712112016