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Item 3 - Exhibit 07 - Consulting Arborist's Report~lb Walter Levison r CONSUL.TING ARBORIST .~ At)... ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com Site Address: 258 Union Ave .. Los Gatos, CA Assessment of Fifteen (15) Protected-Size Trees at and adjacent to 258 Union Avenue Los Gatos, California Prepared for: Ms. Jocelyn Shoopman, Associate Planner Town of Los Gatos Community Development Department 110 E. Main Street Los Gatos, CA 95030 Field Visit: Walter Levison, Contract Town Arborist (CTA) 6/20/2018 Report by CT A 6/21/2018 Revised 7/21/2018 1 of 36 Registered Member. American Society of Consulting Arborists and Member of the International Society of Arboriculture @ Walter Le IA son 2018 All Ri{tlts Reserved Version: 7/21/2018 EXHIBIT 7 ~Jb Walter Levison r CONSULTING ARBORIST .~~ ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified / ISA Certified Arborist #WE-3172A Cell: (415) -~03-0990 I Email: walterslevisonjr@yahoo.com Table of Contents 1.0 Summary 3 2.0 Assignment & Background 9 3.0 Town of Los Gatos -What Trees are Protected? 10 4.0 Recommendations 12 5.0 Tree Protection and Ma intenance Directions per Town Code 16 6.0 Tree Replacement Standards -Los Gatos Town Code 20 7 .0 Author's Qualifications 22 8.0 Assumptions and Limiting Conditions 23 9.0 Certification 24 10.0 Digital Images 24 11.0 Tree Data Table 29 12.0 Attached: Tree Location & Protection Fence Map Mark-up 36 Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Artorists and Member of the International Society of Arnoriculture © Walter Levison 2018 All Rights Reserved 2of36 Version: 7/2112018 ~jh Walter Levison rl CONSULTING ARBORIST 1\\. ~}~ = ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #V\IE-3172A Cell: (415) 203-0990 I Email: walterslevisonj_r@yahoo.com 1.0Summary a. Matrix style overview of protected-size trees (non-exempt species, 4-inches diameter at 4.5 feet above grade). Below, the CTA (Contract Town Arborist) has outlined expected impacts to each tree, along with suggestions for adjustments to the plan set (if applicable) that will optimize tree survival over the long term. 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 determined 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. Note: Only trees within relatively close proximity of proposed work are included in this initial tree study (e.g. tree trunks located between approximately zero and 15 linear feet of current proposed new grading, trenching, excavation, haul routes, landscaping, etc. as shown on proposed plans, and trees with canopy driplines that encroach onto the subject property). Table 1.0(a) (REFER TO THE CTA'S TREE MAP MARKUP WHEN REVIEWING THIS MATRIX) Large Line Tree Tag Common Protected Appraised Site plan changes or restrictions required to reduce impacts Number Number Name Tree Value to "less than significant" (LPT)? Northern 1 1 California -----(Dead tree to be removed). black walnut Currently proposed by the project applicant to be removed. Tree could be retained if landscape plan were to exclude tree 2 2 Shamel ash $500. demolition and replanting in this southeast comer of the site. The plan currently shows removal of all trees in the southeast comer. (Assume removal of existing live trees #1, 2, 13, 14, 15}. 3 3 Camphor --(Dead tree to be removed). tree Almond tree 4 4 (fruiting non----(Dead tree to be removed). regulated tree ) 3 of36 Site Address: 258 Union Ave .• Los Gatos, CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arboriculture IQ Walter Levison 2018 AR Rights Reserved Replacement Rate Per Replacement Canopy Lost Size Tree ------------ 3 24" box ---24" box ------24" box Version: 7/2112018 ,Jb Walter Levison r CONSULTING ARBORIST ,\~ ~ -c ,\' ~·-··-·-· ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #\IVE-3172A Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com Large Line Tree Tag Common Protected Appraised Site plan changes or restrictions required to reduce impacts Number Number Name Tree Value to "less than significant" (LPT)? The current proposed hammerhead turnaround would need to be eliminated or pulled out from within the canopy dripline radius if impacts were to be reduced to less than significant. Pruning to clear the hammerhead will likely cause decline in 5 5 Shamel ash $1,610. condition in terms of both health and structure. Tree may need to be considered a "removal" by Staff to account for this impact. The CT A suggests that the tree be considered a removal for planning purposes, whether or not it is actually removed. The current proposed construction appears to be clear of the canopy. However, a storm drain pipe trench alignment does encroach to roughly 10 feet from the trunk (see applicant's utility plan sheet). Planning Staff can assume less than significant or 6 6 Shamel ash $1,780. minor impacts under the current proposed plan. As noted for ash tree #5, these older ash specimens in poor overall condition with defects (bark inclusion fork, in this case) are probably best removed and replaced , instead of being retained with defects over the long term. 7 7 Camphor $810. (Tree to be removed per current proposed plan). tree 8 8 Camphor $570. (Tree to be removed per current proposed plan). tree If existing retaining wall is demolished, then demolition and construction of new walls or fences will damage this tree if armoring is not installed around the lower trunk to protect the 9 9 Douglas fir $1,270. bark and wood. Armor the lower trunk prior to demolition. 4of36 Site Address: 258 Union Ave .. Los Gatos, CA Registered Member, American Society of Consulting Arborisls and Member of the lnlemetionat Society of Arboficulture ~ Walter Levison 2018 All Rights Reserved Replacement Rate Per Replacement Canopy Lost Size Tree 4 24" box 4 24" box 3 24" box 4 24" box 3 24" box Version: 7/21/2018 ~Jb Walter Levison r CONSULTING ARBORIST -'\. A&~ ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com Large Line Tree Tag Common Protected Appraised Site plan changes or restrictions required to reduce impacts Number Number Name Tree Value to "less than significant" (LPT)? Pruning of the south side of canopy which overhangs into the proposed project area to clear the proposed new driveway could potentially cause severe damage to the tree's long term health and structure, and would violate the Town's tree ordinance section 29.10.0965 which prohibits 10 10 Chinese $1,680. pruning of more than 25% of a tree within a three (3) year pistache time period. The CTA suggests limiting pruning to 25%, and designing the new driveway accordingly to avoid any additional clearance pruning beyond this threshold. Pruning of the south side of canopy which overhangs into the proposed project area to clear the proposed new driveway could potentially cause severe damage to the tree's long term health and structure, and would violate the Town's tree ordinance section 29.10.0965 which prohibits Marina pruning of more than 25% of a tree within a three (3) year 11 11 strawberry $4,210. time period. madrone The CTA suggests limiting pruning to 25%, and designing the new driveway accordingly around the south side of the tree's canopy to avoid any additional clearance pruning beyond this 25% threshold. Neighbor-owned tree. The canopy of this tree has already been pruned to clear much of the north side (258 Union side), which may or may not have been performed with the permission of the tree owner. Root loss from front yard work American at 258 Union may cause severe damage to the tree's root 12 12 sweetgum $2,400. system, and possibly premature death of the tree . cultivar The CTA suggests that Staff require the applicant's landscape arc_hitecture team to design a front yard area that maintains an offset distance of 8 to 12 linear feet (radius) from trunk edge as a "no dig" zone, to avoid significant root loss to this tree. 5of36 Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Arborists and Member ol the International Society of Arboriculture @ Walter Levison 2018 All Rights Reserved Replacement Rate Per Replacement Canopy Lost Size Tree 3 24" box 3 24" box 3 24" box Version: 7/21/2018 ~]b Walter Levison r CONSULTING ARBORIST &\ ------~·-·· .. ---··- ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #'\NE-3172A Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com Large Replacement Line Tree Tag Common Protected Appraised Site plan changes or restrictions required to reduce impacts Rate Per Number Number Name Tree Value to "less than significant" Canopy Lost (LPT)? This native species tree was not noted on the applicant's initial submittal set of plans or the applicant's revised set of plans, as of the date of writing. 13 13 Coast live $4,170. 3 oak The proposed new landscape plan shows this entire southeast corner of the site as to be demolished and replanted with new trees and understory. This native species tree was not noted on the applicant's initial submittal set of plans or the applicant's revised set of plans, as of the date of writing. 14 14 Coast live $4,170. 2 oak The proposed new landscape plan shows this entire southeast corner of the site as to be demolished and replanted with new trees and understory. This native species tree was not noted on the applicant's initial submittal set of plans or the applicant's revised set of plans, as of the date of writing. 15 15 Holly oak $1,020. The proposed new landscape plan shows this entire 3 southeast corner of the site as to be demolished and replanted with new trees and understory. 2017-18 Town of Los Gatos In-lieu fee equivalent= $250 per each required 24" box mitigation tree planting not installed on the site. 1.0 (b) Written Summary of tree disposition and tree issues, based on the set of plans dated (June 29, 2018): 1. TREE IMPACTS EXPECTED IF THE PROJECT WERE TO BE BUil T AS CURRENTLY PROPOSED BY THE APPLICANT: 1.1. Removal of trees #1, 2, 3, 4, 7, 8 (and trees #13, 14, and #15 not surveyed by the applicant). Mitigation will not be required for trees #1, 3, 4 which are dead. Replacement Size Tree 24" box 24" box 24" box The applicant's landscape plan appears to show the demolition of the entire southeast comer area of the site, which includes trees #13, 14, and #15 not surveyed by the applicant. Site Address: 258 Union Ave .. Los Gatos. CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arl>oriculture @ Walter Levison 2018 All Rights Reserved 60136 Version: 7/2112018 ~]h Walter Levison r CONSULTING ARBORIST ASCA Registered Consulting Arborlst #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A 1.2. Tree #5: i ~ ~f\. Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com Possible significant to severe root loss during base section excavation required for the hammerhead, and severe clearance pruning required to clear the proposed hammerhead driveway turnaround airspace. (Tree is suggested by the CTA to be considered a removal, and mitigation fees collected from the applicant, based on the above noted expected impacts). 1.3 Tree #6: Minor impacts from storm drain pipe trench alignment as currently proposed. (Tree is suggested by the CTA to be considered for removal and mitigation, based on defects at the fork which will be a long term issue if the tree remains in the landscape). 1.4 Retaining Wall/ Fencing: The existing CMU block retaining wall along the east property boundary of the site is failing, and will be removed and replaced with a wood fence per the applicant (personal communication, Town Staff, 6/20/2018). If trees #5, 6, 9, and any other trees in the vicinity to be retained on the neighbor's property to the east are not wrapped in thick trunk padding and armoring as noted in the recommendations section of this report, significant to severe damage to the trees' above-ground portions are expected to occur. 1.5 Douglas fir #9: Expect severe damage to tree if the trunk is not wrapped in padding and armored correctly prior to removal of the retaining wall as note above in item #1.4. 1.6 Chinese pistache #10: Expect potentially severe pruning damage in the form of canopy loss during pruning to clear the proposed new driveway airspace. Permission from the owner will be required prior to pruning. Mitigation: Limit all pruning to 25% of canopy mass, per town code 29.10.0965 which prohibits pruning of more than 25% of a tree within a three (3) year time period. Site Address: 258 Union Ave .. Los Gatos. CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arboriculture @ Walter Levison 2018· All Rights Reserved 7of36 Version: 7/21/2018 ,Jb Walter Levison r CONSULTING ARBORIST ,'_\ ~~ --·-· .......... ··-····-·--·· ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #\NE-3172A Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com 1. 7 Marina strawberry madrone #11: Expect potentially severe pruning damage in the form of canopy loss during pruning to clear the proposed new driveway airspace. Permission from the neighbor owner will be required prior to pruning. Mitigation: Limit all pruning to 25% of canopy mass, per town code 29.10.0965 which prohibits pruning of more than 25% of a tree within a three (3) year time period. This may require that the applicant redesign their proposed driveway. 1.8 American sweetgum #12: Expect potential minor to moderate damage in the form of canopy loss and root loss on the north side of the tree during construction of the new residential front yard. It is suggested that the neighbor tree owner and the applicant meet to discuss this issue before construction is approved. Mitigation: Front yard residential landscape design limits that keep all new work, including irrigation pipe trenching, offset from the trunk of this tree by at least 8 to 12 linear feet (radius). 2. LANDSCAPE AND IRRIGATION PLAN SHEETS: The proposed plan has some notable issues concerning the proposed installation of forty-five (45) tree specimens shown on the Aitken Associates sheet L-1 dated 4/17/2018: a. SE Corner: New trees proposed for the southeast corner of the site will conflict with coast live oak #13. b. North Side: New trees proposed for the north property line area will conflict with neighbor-owned pistache #10 and neighbor-owned Marina strawberry tree #11, which will stunt the new tree plantings in the shade, and cause potential crowding conflicts. The plan will need to be revised to avoid these two trees which are not shown on any of the applicant's plans. c. SW Corner: New trees proposed for the southwest property corner will conflict with neighbor-owned sweetgum #12, and will be stunted in the shade of this tree. Crowding may also occur over time. This is a neighbor issue that will have to be resolved between the applicant and the neighbor. Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Art>otists and Member of the International Society of Artoriculture @ Walter Levison 2018 All Rights Reserved Bof36 Version: 7/21/2018 ~]b Walter Levison r CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A ~\ -llfle ..... 9!'/'C'WT'I'..,. ................... ,.--1•1• Cell: (415) 203-0990 / Email: walterslevisonjr@}'ahoo.com d. Species and Cultivar Disease Problems: 'Yarwood' plane tree is known to be highly susceptible to disease, and should never be used in the Bay Area. The only London plane tree cultivar currently available in the trade that is resistant to both anthracnose fungus and powdery mildew fungus when installed in Bay Area locations is 'Columbia'. The CTA suggests that Town Staff require the applicant to remove Yarwood plane tree from the plans, and instead note 'Columbia' as the only allowable plane tree cultivar for the proposed four (4) site plantings. It is widely available in the local wholesale nursery trade. 3. APPRAISAL: The value of each of the survey trees in this study was determined by the CTA and shown in the above table. Values were determined using the Guide for Plant Appraisal 9th Edition, and the Western Chapter International Society of Arboriculture Species Classification and Group Assignment publication (2004). 4. 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. It would be reasonable, based on the actual appraised values of trees assumed to be retained at this site, for the Town to condition the project approval upon posting of a security bond in the amount of roughly $10,000 to $25,000 to ensure that both neighbor trees and on-site trees being retained and protected actually survive the construction process and maintain their pre-project condition ratings into the future. Another option would be to bond the neighbor trees, and simply account for site trees #5 and tl6 as "removals", charging the applicant canopy replacement fees for these two site trees. The value of the applicant's proposed new landscape tree installations is far greater than the value of any tree removal at this site, which means that the applicant will not actually have to pay any canopy replacement fees to the Town. 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 in relatively close proximity to the proposed site plan project. Due to the property being locked and basically inaccessible on the day of field survey, the CTA jumped the fence without tagging equipment, and was only able to tag trees #13, 14, and 15 while standing on a neighboring property. Tag numbers #1 through #8 correspond to the Debbie Ellis report on this site that was prepared many years ago. Some of those tags are still affixed to the trees. Tag numbers are noted on the CT A's tree map markup attached to the end of this written report. Trees #10, 11, 13, 14, and #15 were not shown as survey plot dots on the applicant's 1st submittal set of plans. Also, trees #9, 10, 11, and 12 may be significantly damaged by site work, depending on the severity of clearance pruning required, method of retaining wall demolition, etc. Site Address: 258 Union Ave., Los Gatos, CA Registered Member. American Society of Consulting Arborists and Member of the International Society of Arboricutture @ Walter Levison 2018 All Rights Reserved 9 of36 version: 7/21/2018 ·~ ~t!t~fiN!'~tJ:m A\ ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #V\/E-3172A Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com The CTA summarized the tree situation from a long-term site manager's perspective, both in table form and in written form above, in section 1.0. Specific recommendations for tree maintenance and protection are outlined below in section 4.0. Digital images of the trees archived by the CTA are included below in this report for reference of existing pre-project conditions. The tree data table with detailed tree information based on the CTA's field assessment on 6/20/2018 makes up section 11.0 of this report. The CTA used a forester's D-tape to determine trunk diameter at 4.5 feet above grade, or at a narrow point below a mainstem fork if the fork occurs at 4.5 feet above grade. The D-tape converts actual trunk circumference into diameter in inches and tenths of inches. Tree heights were determined using a Nikon Forestry Pro 550 hypsometer/rangefinder. Tree canopy spreads were visually estimated. The attached tree map mark-up prepared by the CTA was created using the applicant's grading and drainage plan sheet C-3 dated 5/7/2018 by Hohbach- Lewin, Inc. of Palo Alto, California, marked up with various highlight coloration as discussed in section 12.0. Trees that were not shown on the applicant's initial set of plans were added by the CTA as "rough plot" trunk dots and approximate canopy driplines (e.g. trees #10, 11, 13, 14, 15). The applicant was then requested to add all neighbor and boundary tree plot points to the submittal set of plans, in order for Staff and the CTA to better assess impacts to trees from proposed site work. The CTA reviewed the applicant's plan set of sheets available from Town of Los Gatos Staff (various dates, April and May, 2018). 3.0 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 total) trees on developed residential property not currently subject to development review. 3. 8 inch diameter (8 inch multistem total} blue oak (Quercus douglasi1), black oak (Quercus kellogi1), California buckeye (Aesculus californica}, and Pacific madrone (Arbutus menziesil) on developed residential lots not currently subject to development review. 4. 8 inch diameter (8 inch multistem total) trees on developed residential property not currently subject to development review, on lots in the designated Hillside Area per the official Town map. 5. All trees with a single mainstem or sum of multiple mainstems totaling 48 inches diameter or greater at 4.5 feet above grade are considered "Large Protected Trees" (LPT). 1 Adobe Pro was used to mark up the tree map. In order to "lock" the mark-ups, the CTA printed a PDF of the marked-up PDF sheet, which resulted on some loss of color intensity. Site Address: 258 union Ave .. Los Gatos, CA Registered Melrber. American Society of Consulting Arborists and Member of lhe International Society of Art>onculture © Waller Le.;son 2018 All Rights Reserved 100136 Version: 7/2112018 ~]h Walter Levison r CONSULTING ARBORIST I~ &\. ___ .... ikl<' __ . ·-·It~·~·,._ ...... ,. ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Quallfled / ISA Certified Arborist #WE-3172A Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com 6. All oak species (Quercus spp.), California buckeye (Aesculus califomica), and Pacific madrone (Arbutus menziesi1) 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 permit is required to prune, trim, cut off, or perform 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 permit is required to prune, trim, or cut any branch or root greater than four (4) inches 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 version 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 pollarding of fruitless mulberry (Morus alba) or other spectes 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) b . Acacia me/anoxylon (blackwood acacia) less than 24 inches (multistem total or single stem) c. Liriodendron tu/ipifera (tulip tree) less than 24 inches (multistem total or single stem) d. Ailanthus a/tissima (tree of heaven) less than 24 inches (multistem total or single stem) e. Eucalyptus globulus (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.los gatosca.gov/documentcenter/view/176 h. All palm species (except Phoenix canariensis) less than 24 inches (multistem total or single stem) i. Ligustrum lucidum (glossy privet) less than 24 inches (multistem total or single stem) Note that per the exception in part 'a' above, fruiting olive trees with stems totaling less than 18 inches are considered non- protected. Site Address: 258 Union Ave .. Los Gatos, CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arboriculture © Waller Levison 2018 All Rights Reserved 11 0136 Version: 7/21/2018 ~Jb Walter Levison r CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A 4.0 Recommendations: 1. Pro ject Team Pre-Project Clarifications or Chan ges Req uested: I~ ~~ --·----,., _ _,, .. _,._,.. .. ,. Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com a) Landscape trees vs . existin g trees at Southeast corner: It is suggested that the applicant verify which specific trees are to be demolished in the southeast corner of the site. The current proposed landscape plan appears to show demolition of trees #13, 14, and #15, which may or may not be located on the 258 Union property (these three (3) trees are currently shown as non-accurate rough-plot points penciled in by the CTA on the tree map markup at the end of this report). b) Landscape Plan/ Choice of Plane Tree Cultivar: The applicant currently proposes installation of 'Yarwood' plane tree which is a known disease- susceptible cultivar. The CTA highly recommends that only the 'Columbia' plane tree cultivar be used . This cultivar is now commonly available in the wholesale nursery trade in the Bay Area. c) Trees #5 and #6 / Remove vs. Retain: Verify with applicant whether they wish to remove trees #5 and #6 that are currently in poor overall condition with poor long term tree preservation suitability (TPS) ratings. Removal of tree #5 would allow for construction of the proposed new driveway hammerhead turnaround area. Removal of tree #6 would open up the only other remaining site area with an on-site tree (tree currently shown as to remain). Removal of the trees would allow for continuity of new landscaping, and removal of potentially problematic structural issues that would remain with these older topped trees over the long term. If tree #5 were to be retained, the current proposed hammerhead driveway airspace area would not be able to be cleared, given the limited 25% canopy pruning rule per Town Code. If tree #5 were to be retained, then use maximum of 4-inches total cut depth below existing soil surface grade for all base section prep required for the hammerhead profile. If tree #6 were to be retained, the current proposed storm drain pipe trench alignment may need to be pulled westward by an additional 10 linear feet or so to increase root zone retention between the proposed new residence and the tree trunk, to achieve a root zone impact level of less than significant. d) Neig hbor tree #10: Pruning of the neighbor-owned tree #10 overhanging canopy that extends into the proposed new driveway airspace will need to be restricted to a maximum of 25% of canopy, per Town code 29.10.0965. e) Neig hbor tree #11: Pruning of the neighbor-owned Marina strawberry tree #11 overhanging canopy that extends into the proposed new driveway airspace will need to be restricted to a maximum of 25% of canopy within a three (3) year period, per Town code 29.10.0965. This will mean that the tree canopy will remain somewhat within the proposed new driveway airspace, and will require the applicant to push the birds-eye driveway profile southward to avoid the (25% pruned) canopy of tree. f) CMU Retaining Wall Demolition: It is assumed that the existing retaining wall failing along the east side of property will be removed and replaced with a wooden fence (personal communication, Jocelyn Shoopman, Associate Planner). During this work, any tree within 20 feet of the wall could potentially be damaged by demolition activity, depending on the direction(s) that the wall is pulled. If demolition work occurs only on site, then damage to tree #9 and other neighbor trees may be avoided. Damage to site trees can be expected, even if trunk buffer wraps and root protection zone fencing is used. Verify with applicant to determine how this demolition work will occur. Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arl>oliculture I!:> Watter Le..;son 2018 All Rights Reserved 12of36 Version: 7/21/2018 ~]b Walter Levison r CONSULTING ARBORIST ,'_\ ~\. ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com 2. Security Bond: It is suggested that Town Staff condition this project on receiving security bond monetary funds in the amount of $10,000 to $25,000, to account for neighbor trees #9, 10, 11, 12, (13), and any site trees retained, such as #5 and/or #6, as a hedge against potential decline or death of one or more of the survey trees to remain in close proximity to the proposed site plan project. Staff may choose to reduce this fee to a lesser amount. See table 1.0(a) for individual tree appraised values. 3. Trunk Buffer Wrap Ty pe Ill Protection : Prior to demolition commencement, install a trunk buffer around the lowermost 6 to 8 feet of the mainstems of all trees being retained in close proximity to proposed new construction activity (including neighbor tree #9 if wall demolition work occurs on that neighboring site). Wrap approximately 10 to 15 wraps of orange plastic snow fencing around the trunk between grade and 6 to 8 feet above grade to create a padding at least 1 to 2 inches thickness. Stand 2x4 wood boards upright, side by side, 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 T yp e I and/or Typ e II Root Protection Zone (RPZ ): Prior to commencing site demolition, erect chain link fencing panels set on moveable concrete block footings. Wire the fence panels to iron layout stakes pounded 24 inches into the ground at the ends of each fence panel to keep the fence route stabilized and in its correct position. Do not wire the fence panels to the trunks of the trees. Pre-construction fence routes: (To be determined at a later date). Protection shall be at the farthest possible offset distances from both neighbor- owned trees #9, 10, 11, 12, and on-site trees being retained. 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". Site Address: 258 Union Ave., Los Gatos. CA Registered Member. American Society of Consulting Arborists and Member of the International Society of Arboriculture @ Walter Levison 2018 All Rights Reserved 13of36 Version: 7/21/2018 ·~ ?~!~~i .!--~.ViJ!?R '~ .~:\. ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #V\/E-3172A Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com No storage, staging, work, or other activities will be allowed inside the RPZ except with PA monitoring. Note however that some RPZ fencing areas may need to be removed or moved to allow for final hardscape and final landscape plant and irrigation system installation to occur. 5. Signage: The RPZ fencing shall have one sign affixed with UV-stabilized zip ties to the chain link at eye level for every 15 linear feet of fencing, minimum 8"X11" size each, plastic laminated, with wordage that includes the Town Code section that refers 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: Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Art>orists and Member of the Internati onal Society of Arbolicutture @ Walter Levison 2018 All Rights Reserved EMAIL: 140136 Version : 7/2112018 ~lb Walter Levison r CONSULTING ARBORIST 1\\ ~l~ .. ·-... ~. ·~ ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo .com 6. Water Spray: Spray off foliage of all trees within 20 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. Spray should be applied approximately once-monthly, or when ambient airborne dust concentration is unusually high. 7. Temporary Irrigation During Construction (as app licable): Provide trees being retained on and adjacent to the site with temporary periodic heavy irrigation during the construction period. The volume of water should be roughly 50 to 100 gallons per tree, per each 1x/week irrigation event. Water application can be made using one or more of the following methods (see sample images): • Soaker hoses. • Emitter lines. • Garden hoses. • Fire truck hoses. • Water trucks. • Tow-behind spray tank apparatus (see image at right). • On-site water tank with gravity feed. • Over-grade PVC piping with spray heads wired to rebar or other steel stakes (see image at right). 8. Tree Maintenance Actions/ Sug gested: (Subject to discussion with Town Staff Prior to Site Plan Finalization): Tree#5 Prune site tree #5 (if retained) to partially clear the proposed new hammerhead. The Town tree code only allows for up to 25% of a canopy to be removed over a three-year period, which will not clear the proposed hammerhead airspace. This means that the hammerhead will need to be redesigned to farther west of tree #5 than currently proposed . Site Address: 258 Union Ave .• Los Gatos, CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arboliculture @ Walter Levison 2018 Al Rights Reserved 150136 Version: 7/21/2018 ,Jb Walter Levison r CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A Trees #10 and #11 1\\. i/-1).. __ .,. .... H...- _,,., .~.---... Cell: (415) 20~-0990 / Email: walterslevisorij_r@yahoo .com Prune neighbor trees #10 and #11 to clear the proposed new driveway. All pruning shall be limited to small diameter live wood and foliage, preferably branches less than or equal to 1 or 2-inches diameter only, to clear the airspace over the proposed new driveway up to roughly (x)-feet above grade (height to be determined). This pruning would need to be performed per ANSI-A300 standards, and under direct site supervision of an !SA-Certified Arborist. Given that this pruning could cause decline or death of one or both trees, depending on the severity of pruning, this is a matter for further discussion between the applicant and the tree owner. Again note the Town rule which restricts pruning to 25% of canopy within a three year period. This means that the proposed driveway construction area will probably not be cleared in terms of vertical and horizontal airspace. The applicant will probably need to relocate the driveway further southward from neighbor tree #11 than currently proposed, in order to allow the driveway to be constructed free and clear of the tree #11 canopy (after 25% canopy pruning). Cabling/Bracing Cabling and/or bracing will be required for tree #6 if it is retained. All work shall be performed in accordance with ANSI-A300 standards for tree support systems . 5.0 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 on 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 drip line ; (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 Site Address : 258 Union Ave .. Los Gatos , CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Albonculture «> Walter Le11ison 2018 All Rigils Reserved 160136 Version : 7/21/2018 ~)h Walter Levison rl CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist 'INVE-3172A ,':_\. ~J}.. __ , V---•'""• -........ , ....... Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com 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 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 fenced as specified in section 29.10.1005: (1) The final approved tree preservation report shall be included 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, utility, 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 all 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 development 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 Council of Tree and Landscape Appraisers (CTLA) 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 constitute 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 development. 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 will 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. Site Address: 258 Union Ave., Los Gatos. CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arboliculture <o Walter Levison 2018 Al Rights Reselll8d 170136 Version: 7/2112018 ,Jb Walter Levison r CONSULTING ARBORIST BE\ .._ ____ ,,,..._ --.. ,. ----·· ASCA Registered Consulting_ Arborist #401 / ISA Tree Risk Assessment Qualified / ISA Certified Arborist #WE-3172A Cell: (415) 203-0990 / Email: walterslevisonjr@__yahoo.com (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 trees in accordance with the tree 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 permit 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 required 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. Work 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, 11, 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 no 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, 11, Ill fencing. Fencing shall be erected before demolition, grading or construction permits 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 construction and prohibit any storage of construction Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Artorists and Member of the International Society of Alt>oriculture © Walter Levison 2018 All Rights Reserved 18of36 Version: 7/2112018 ~lb Walter Levison r CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A ,\\. ~t\. Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com materials or other materials, equipment cleaning, or parking of vehicles within the TPZ. The dripline shall not be altered in any way so as to 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 be located outside of the drip line when feasible. (6) Retain the services of a certified or consulting arborist who shall serve as the project arborist for periodic monitoring of the project site and the health 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 Management Practices-Tree Pruning and ANSI A300-Part 1 Tree , Shrub and Other 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 consulting arborist shall 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 of 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-five percent or more of the crown of any protected tree without first obtaining a permit pursuant to this division except for pollarding of fruitless mulberry trees (Marus 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) Site Address: 258 Union Ave ., Los Gatos, CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Ar'ooriculture © Walter Levison 2018 All Ri~ts Reserved 19 of 36 Version: 7/21/2018 ;p ?~!t~r.N~r.v.ii~~ ASCA Registered _fonsulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A 6.0 Tree Replacement Standards -Los Gatos Town Code (Excerpted from Town Code 29.10.0985 and 29.10.0987) ~\ ,':':::.,";:':;:.."lt'.:::"- Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com (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 the 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, II, 8-4-03) Table 3-1 -Tree Canopy-Replacement Standard --- (Staff is using 24" box size as Canopy Size of Removed Tree 1 the Replacement Standard for SFR Projects as of 2016) 2 •4 ------· I 10 feet or less Two 24 inch box trees ~---- More than 10 feet to 25 feet Three 24 inch box trees Four 24 inch box More than 25 feet to 40 feet trees; or Two 36 inch box trees ' i--• Six 24 inch box More than 40 feet to 55 feet trees; or Three 36 inch box trees 200136 Site Address: 258 Union Ave ., Los Gatos, CA Registered Member, American Society of Consulting Artorists and Member of the International Society of Arboriculture @ Watter Levison 2018 All Rights Reserved I l Single Family Residential Replacement3 •4 I . ~ I Two 15 gallon trees Three 15 gallon trees I Four 15 gallon trees I Not Available Version: 7/2112018 ~lb Walter Levison r CONSULTING ARBORIST ·\\. ~\.. .. ,__ '~ -"···--· ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #V\/E-3172A Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com [ -J ]--Ten 24 inch box Greater than 55 feet trees; or Five 36 Not Available inch box trees ------------------------------ l Notes 1To measure an asymmetrical canopy of a tree, the widest measurement shall be used to determine canopy size. 20ften, 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 Town Tree Replacement Fund . 3single Family Residential Replacement Option is available for developed single family residential 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. 4 Replacement Trees shall 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 requirements in the Hillsides shall comply with the Hillside Development Standards and Guidelines Appendix A and Section 29.10.0987 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 which 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 Guidelines (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 the HDS&G . (b) If the removed tree is not listed in Appendix A, it may be replaced with a tree listed in Appendix A, or replaced with another species of tree as approved by the Director. (c) Replacement trees listed in Appendix A may be planted anywhere on the property. (d) Replacement trees not listed in Appendix A may only be planted within 30 feet of the primary residence . (3) Replacement requirements shall comply with the requirements in Table 3-1 Tree Canopy Replacement Standard of this Code. Site Address: 258 Union Ave ., Los Gatos, CA Registered Member, Amertcan Society of Consulting Arborists and Member of the International Society of Arboriculture © Watter Levison 2018 Al Rights Reserved 21 of36 Version: 7/2112018 ~lb Walter Levison r CONSULTING ARBORIST J&\ _ .• _ .. ..:,.!!.,": .. ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A Cell : (415) 203-0990 / Email: walterslevisonjr@yahoo.com (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. 7 .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 Arborist, Town of Los Gatos, California Community Development Department I Planning Division 2015-present • Tree Risk Assessment Qualified (ISA TRAQ Course Graduate, Palo Alto, California) • Millbrae Community Preservation Commission (Tree Board) 2001-2006 • ASCA Registered Consulting Arborist #401 • ASCA Arboriculture Consulting Academy graduate, class of 2000 • Associate Consulting Arborist Barrie D. Coate and Associates 4/99-8/99 • Contract City Arborist, City of Belmont, California Planning and Community Development Department 5/99-present • ISA Certified Arborist #VVC-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 UCSC Chancellor's Award, 1990 (My full curriculum vitae is available upon request) Site Address: 258 Union Ave., Los Gatos, CA Registered Member. American Society of ConsulHng Art>orisls and Member of the International Society of Art>oricutture @ Walter Levison 2018 All Rights Reserved 22 of36 Version: 7/21'2018 ~lb Walter Levison r CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #\NE-3172A 8.0 Assumptions and Limiting Conditions 1\\ &~ Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com Any legal description provided to the consultant/appraiser is assumed to be correct. Any titles and ownership to any property are assumed to be good and marketable. No responsibility 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 management. It is assumed that any property is not in violation of any applicable codes. ordinance, statutes. or other government regulations. Care has been taken to obtain all information from reliable sources. All data has been verified Insofar as possible; however, the consultant/appraiser can neither guarantee nor be responsible for the accuracy of information provided by others. The consultant/appraiser shall not be required to give testimony or to attend court by reason of this report unless subsequent contractual arrangements are made, including 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 whom it is addressed, without the prior expressed written or verbal consent of the consultant/appraiser. 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 consultant/appraiser as stated in his qualifications. This report and any values expressed herein represent the opinion of the consultant/appraiser, and the consultant's/appraiser's fee is in no way contingent upon the reporting of a specified value, a stipulated result, the occurrence of a subsequent event. nor upon any finding to be reported. Sketches, drawings, and photographs in this report, being intended for visual aids, are not necessarily to scale and should not be construed as engineering or architectural reports or surveys unless expressed otherwise. The reproduction of any information generated by engineers, architects, or other consultants on any sketches. 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 Levison 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 items at the time of inspection; and b. the inspection is limited to visual examination of accessible items without dissection, excavation. probing, or coring. There is no warranty or guarantee, expressed or implied, that problems or deficiencies of the plants or property in question may not arise in the future. Loss or alteration of any part of this report invalidates the entire report . Arborist Disclosure Statement Arborists are tree specialists who use their education, knowledge, training, and experience to examine trees, recommend measures to enhance the beauty and health of trees, and attempt to reduce the risk of living near trees. Clients may choose to accept or disregard the recommendations of the arborist. or to seek additional advice. Arborists cannot detect every condition that could possibly lead to the structural failure of a tree. Tree are living organisms that fail in ways we do not fully understand. Conditions are often hidden within trees and below ground. Arborist cannot guarantee that a tree will be healthy or safe under all circumstances, or for a specified period of time. Likewise, remedial treatments, like any medicine, cannot be guaranteed. Treatment, pruning, and removal of trees may involve considerations beyond the scope of the arborist's services such as property boundaries, property ownership, site lines, disputes between neighbors, and other issues. Arborists cannot take such considerations into account unless complete and accurate information is disclosed to the arborist. An arborist should then be expected to reasonably rely upon the completeness and accuracy of the Information provided. Trees can be managed, but they cannot be controlled. To live near trees is to accept some degree of risk. The only way to eliminate all risk associated with trees is to eliminate the trees . Site Address: 258 Union Ave .. Los Gatos. CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arboricullure @ Walter Levison 2018 All Rights Reserved 23of 36 Version : 7/2112018 ~Jb Walter Levison r CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #IIVE-3172A. 9.0 Certification '~ i:1-~ ".:::..,-.""::.. ..... -..::.::.: Cell: (415) 203-0990 / Email : walterslevisonjr@yahoo.com I hereby certify that all the sta.tements o!Jact in this report are true, complete, and correct to the best of my knowledge and belief, and are made in good faith. Signature of Consultant 10.0 Digital Images WLCA archived images of the survey trees on 6/20/2018: Tag # Image 1 (Dead walnut) Site Address: 258 Union Ave., Los Gatos, CA Registered Member. American Society of Consulting Arborists and Member of the International Society of Arboriculture © Waller Levison 2018 All Rights Reserved Tag # 2 24of36 Image Version: 7/21/2018 Tag # 3 5 ~]h Walter Levison rl CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #IIVE-3172A Image {Dead) Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arboriculture @Walter Levison 2018 All Rig,ts Reserved Tag # 4 5 25of 36 1\\ JM~ Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com Image Version: 7121/2018 t>lp ?t!~~r..!·r:ii~~ ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #VVE-3172A Tag # Image 6 7 Site Address: 258 Union Ave .. Los Gatos, CA Reg istered Member, American Society of Consulting Artlorists and Member of the International Society of Arboricutture @ Walter Levison 2018 All Rights Reserved Tag # 6 8 26 of 36 JJ\ Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com Image Version: 7/2112018 Tag # 9 ,Jb Walter Levison r CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A Image Neiqhbor tree Site Address: 258 Union Ave .. Los Gatos, CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arboriculture e Walter Leloison 2018 All Rlg,ts Reserved Tag # 10 27of 36 ~~ ~~ ··-·"" "if Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com Image Neighbor tree Version: 7121/2018 ~lb Walter Levison r CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #v'VE-3172A Tag # Image 11 13 and 14 Neighbor tree Possible neighbor-owned coast live oak tree specimens (not verified). Viewed from neig hboring lot. Site Address: 258 Union Ave., Los Gatos, CA Registered Member, Amertcan Society of Consulting Arbolists and Member of the International Society Of Arbortculture © Walter Le~son 2018 All Rights Reserved Tag # 12 15 28 of 36 '~~ Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com Image NeiQhbor tree Holly oak #15 as viewed from the neighboring lot. Version : 7/21/2018 ! E :> z ! ! I- 2 3 4 5 ~J)J Walter Levison CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #\NE-3172A 11.0 Tree Data Table '~ ~}~ --H -• .... Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com NOTE 1: Fruit and nut trees measuring less than 18" diameter {total of all mainstems) both on the site and on adjacent neighbor properties were excluded from this study as "exemption trees" per the Town tree ordinance. NOTE 2: Tree preservation suitability ratings (TPS) are determined independently from and irrespective of current proposed site construction work. Genus& Species Juglans hindsii (per Debbie Ellis report) Fraxinus uhdei Cinnamomum camphora Prunus edulis (per Debbie Ellis report) Tree is non- regulated fruit/nut tree less than 18" diameter total. Fraxinus uhdei (per Debbie Ellis report) Common Name Northern California black walnut Shamel ash Camphor tree Almond tree Shamel ash .. f Ii i5 :le C ~ 13.5 8.1 17 6 15 .. I Ii i5 Sol C ~ 6.2 6 12 .. I Ii c i 2 I- 5 Etc. a.= § {:; ~ Sl OU EE ~i5 13.5 14.3 17 17 Total 59 ~ 0 C .,_ u .; oa '=-_,. .c "' .21 I! .. Q. :i:: en 25/20 28/35 ~ = "'-~ fi oa ~ w =-;;!! ci ~ g :! en~ Overall Condition Rating (0 to 100%) 75/35 I 48% Poor 86/36 45% Poor X X X X 29 of 36 Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Arborists and Member of the lntemafional Society of Arboriculture © Walter Levison 2018 All Rights Reserved rr 't,., 11 ,(I), "-' X C 0 = .. -i~1 f: .. II. i I!' !'si I-U) 0:: n/a Poor to Mod n/a n/a Poor ~ o-c C c'.J~ ig :!:! ,. !~ .3 s. -.§ Ii -.e ..J 'a -! .. 20 I-.s. i 0:: = .E 'e G 'a U) Iii: ._ C .. ·-ii:,. si o::m The CTA is not clear as to why this tree in poor overall condition is proposed to be retained, given that construction of the hammerhead turnaround will conflict with the canopy. ,. I; 1ft 'O .. J! C GI 3 0 a,"' cZ ,!I OI i i 1.L.i 11.CD.o (DEAD per Debbie Ellis report 2013) Tobe removed per project team landscape plan sheets. (DEAD) (DEAD) Topped in pastto clear low voltage wires, at roughly 18 feet above grade. Strings around one stem are girdling the stem. II) !.I z::! ~ oc <I) ~~ 11-1!! ~ OOz -: Oo::w -0:: a.. II.. !: 15to 20 feet radius offset (hammer head turn- around will conflict). version: 712112018 w u z :l! Q z 1-w u U) I-I!! w ~coc <zo::o :::E <Ca.. u TB,RPZ,W i § z ! ~ I- 6 7 8 ~) Walter Levison CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist 'IM/E-3172A Genus & Species Fraxinus uhdei (per Debbie Ellis report) Cinnamomum camphora Cinnamomum camphora Common Name Shamel ash Camphor tree Camphor tree .. I Ii i5 ~ C 2 I- 21.3 at 48" above grade 8.8 Stem Cluster .. I Ii ci ~ C 2 I- 4.2 i Ii ci ~ C ~ ... C :I t. =i I!! .... .!! 0 QI EE :I .. fl) i5 21.3 at 48" above grade 13.0 15 total ~ 0 C .,_ CJ .. '°~ -'ti .c .. gf G> Q. :c fl) 25/30 25/16 35/28 ... C ;, ~:c -u <II ; :l -s-~ 'iii ~ C, • -c, %11>.t:.. 85/25 43/40 60/50 Overall Condition Rating (0 to 100%) 40% Poor 42% Poor 54o/. Fair X X 30 of 36 Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Arborists and Me mber of the International Society of Arboriculture © Walter Levison 2018 All Rights Reserved J I X I [ it· ,11 1-i ~ Poor Poor to Mod Poor to Mod '~ ~~ --:--..,,CoffT'I'--.-... _ ... _.. .. Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com ~ o-c C • .2 CJ i i-'tl'tl ii G> c:q; .3 .s. South -·t C .2 Ii ...J '6 ... . Cl, 2c I-- I ... .5 'e 6 ~ on= I!? u. .. .5 ~ 'i 8 '§ a: m i .. 'ti -G> Ii G>; I !I I st .. :I!! Q. CQ.U Bark inclusion fork at 3 to 4 feet Will require cabling or bracing if tree is retained. Note tree was topped at 18 feet In past to clear low voltage utilities. This tree is not a good specimen to retain over the long term. Extensive twig dieback likely caused by extended drought conditions drawing down soil moisture. Extensive twig dieback likely caused by extended drought conditions drawing down soil moisture. Lopsided southwest. U) le z2 ;!! QC (ll ti~ W WW C) I-I-CJ g g~ifi ~ !in a: Q. u. - 15 to 20 feet offset radius. Version: 7/2112018 w CJ z Z O < j:: ifi CJ fl) I-I!! w :!!::coo <za:o ~,c(Q.CJ TB, RPZ, W,and consider cabling and/or bracing to stablllze the fork, if tree is to be retained. .. ! E ::, z ! ! 9 10 11 I ~)~ ?~~N ~~:'.i~~~ ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #V\/E-3172A Genus& Species Pseudotsuga menziesii Pistacia chinensis Arbutus 'Marina' Common Name Douglas fir Chinese pistache Marina strawberry tree .. I Ill i3 ::;;; C 2 I- Est. 18 Est. 8 9 Site Address: 258 Union Ave., Los Gatos, CA .. .!I a, i i3 ~ C ~ 8 .. ! Ill i3 C') .... ! "" C 2 I- = I!! ,c OJ ... _ 0 II E fi ::, ·-UJ C EsL 18 Est. 8 EsL17 ~ 0 C (! ~ oO !!.. -"Cl .C OI .9 ! a, a. :c UJ 28/15 23/16 20/25 = C = ~';:' -u oO ~ ill = t, ~ :sg %U,~ 45/45 90/60 sono Overall Condition Rating (0 to 100%) 45% Poor 70% Good 75%Good 31 of36 Registered Member, American Society of Consulting Arborists and Member of the International Society of Arboriculture © Walter Levison 2018 All Rights Reserved r,: I-' 11 X X X a i -1~r D. I I I =i I-II) Ill: Poor to Mod Good Good ;~ ~~ ,.,,........,_11,.,.....,111:n..,. ., .... ,...,,,._."" ........ ,.,. Cell: (415) 203-0990 I Email: walterslevisonjr@yahoo.com ~ o-c C ~i "i.!::: :§!"Cl a ., oo ..I ,E. -C 0 Iii) ~ =a -" II 2g I-- J = .5 'E i3 ;g ctt= fl&. .. .5 ii:,:i -a, 8~ 111:m .... Iii .. "Cl • .! a.,~~ .!! =a, .. Ill = !II.! lci&:o Tree was topped in past to clear various utility wires. Tree not noted on plans. Tree owned by neighbor, and could be damaged during removal of CMU block wall. Neighbor tree not noted on applicant's 1•1 submittal set. Will require clearance pruning to clear project area, potentially resulting In severe damage to the canopy. Neighbor tree not noted on applicant's 1•1 submittal set. Will require clearance pruning to clear project area, potentially resulting in severe damage to the canopy, UJ :i z2 W QC ti t; ~ Ill WW :.') I-I-I.) c.,Ooz .-, 5 0111:w i,'. \iii Ill: D. 11. - n/a 5to 10 feet offset from the property line fence(?) 5to 10 feet offset from the property line fence(?) Version: 7/2112018 w I.) z ~ Q z 1- w I.) UJ I-~ w :!!: coc ,c z 111: 0 ~,CD.I.) TB Set up chain link fence as a partial perimeter to protect the section of canopy that overhangs the site. Call tree owner to authorize pruning as necessary. Set up chain link fence as a partial perimeter to protect the section of canopy that overhangs the site. Call tree owner to authorize pruning as necessary. i E :::, z ! ! 12 13 14 ~~ Walter Levison CONSULTING ARBORIST ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A Genus & Species Liquidambar styraciffua Cult. Quercus agrifolia Quercus agrifolia Common Name American sweetgum cultlvar Coast live oak Coast live oak I i i5 :i;; C ~ 13.2 Multi stem 5.6 .. ! i c s:! C ~ .. ! Ii i5 ~ C ~ (Cluster) ... C ~ ~~ 0 ai §.§ inc 13.2 Total 48 5.6 ~ C .,_ o...i oll~ l: i .2'f CD a. :c in 32/20 18/10 18/7 ... C :a:, .. _ D::.s:: -... .... o11 ~w Ei~ :! iii c 65/50 Overall Condition Rating (Oto 1oo•M 56% Fair 90/60 I 75% Good 90/90 90°/o Exe. X X 32 of 36 Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Arborists and Member of the International Society of Arboriculture © Walter Levison 2018 All Rights Reserved ! 1 !! X I -z: It) if~ Q. i I!' 1~= a-JU! Mod to Good Good Very Good 1\~ ~~\.. __ ..... _, ...... -. ·-·-.. -.. -·~ Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com t o-c C 11.S! o-i1 3! 'Cl Ii _._ C .S! :.i ..I;; .... Ct$ 2c I-- i a:: ... .5 'e 5 ji ·= a, IL • C ..!!-~i 8:::, a::m 'Cl C 'Cl ~= C CD 3 l5 II., cZ !I .. i .. :I .. i Q. CII.U Mayor may not require clearance pruning to clear project area, potentially resulting In severe damage to the canopy. Tree not noted on applicant's revised submittal set. Tree assumed to be removed, per proposed landscape plan which removes all vegetation In this comer of the site. Tree not noted on applicant's revised submittal set. Tree assumed to be removed, per proposed landscape plan which removes all vegetation in this comer of the site. in A z2 ~ oc ti) fi ~ ~ .... I!!~ g g~ifi :! ~ 0:: II. IL !!:, &to 10 feet offset from the property line fence(?) Version: 7/2112018 w 0 z Z O < -z 1- w :din I-I-w :!!:coc <za::O ~<11.0 Set up chain link fence as a partial perimeter to protect the section of canopy that overhangs the site. Call tree owner to authorize pruning as necessllr}'. ~]b Walter Levison r CONSULTING ARBORIST ASCA Registered Consulting Arborist #4011 ISA Tree Risk Assessment Qualified I ISA Certified Arborist #VVE-3172A --J --.... >, 1:11 .. .! I C Q. C I • .. ,. 0 .. Overall E !ii ! -C .. _ z Genus & Common ... .,_ a: .c Condition I Cl CJ..; 1) g, Species Name i5 i5 Q ~! o11!:!:. all;~ Rating ... ... ~ ~ l:l (Oto .... 0 • a .. a' I I C C C ~j .!i!'I! • f o 100%) 2 2 ~ i.t ... ... ... (l)Q :! a, i 15 Quercus ilex Holly oak 6.2 6.2 21/16 90ns I 85% Good I X Overall Tree Condition Ratings / Breakdown of Numeric Ranges: 01-29% = 30-49°/o = 50-69%= Very Poor Poor Fair 70 -89% = Good 90 -100% = Exceptional Site Address: 258 Union Ave., Los Gatos, CA Registered Member. American Society of Consulting Arborists and Member of the International Society of Arboriculture <el Walter Levison 2018 All Rights Reserved 330136 g 1~[ I!= .. Q, i I!' I'§ ii i,-IO Ii? Good to Very Good A\ ~~~~ .. Cell: (415) 203-0990 I Email: waltersievisonjr@yahoo.com fc 13 j I :s t • sl C ~I .... ,, C -5 ~s I a: 1:11 .5 'E 6 ;s ·= I! I&. .. .5 ii:,, .. -! 8 ,. a: m ,, Iii .. ,, ... Ca,~ 0 jJ;i G.c.to Tree not noted on applicant's revised submittal set Tree assumed to be removed, per proposed landscape plan which removes all vegetation in this comer of the site. II) 0 z2 lw fi~ WW ... ... CJ OOz ~ Oa:w u: lt:G.U.- Version: 712112018 w CJ z Z O < -z ... w CJ (I) i,-l!!w zcoc cfza:o :Ii c( 11. CJ ~]h Walter Levison rl CONSULTING ARBORIST I ~ 8~ ---·· ... ... -.... --..... . ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #WE-3172A Cell: (415) 203-0990 I Email: walterslevisonjr@_yahoo.com Tree Preservation Suitability (TPS) Ratings Based Solely on Each Tree's Merits: (Not Associated With Proposed Site Plan Construction-Related Work) TPS Rating Definition Exceptional current season's live twig density and twig extension ("TOE"). Tree provides multiple benefits to the property and users of site (e.g. shade, wildlife, patriarch tree, key landscape element or specimen in front yard, etc.). Trees with a VG minimum overall condition rating of 85% out of 100% points possible as determined by the City Arborist. Tree structure Very Good vertically-oriented with little or no lopsidedness or other architectural defects. Species with long life expectancy, and/or good resistance to most pests and diseases. Tree in a position that is correct for its sun/shade/drainage needs. Tree not damaged by incorrect pruning. Redesign of applicant's proposed site work is warranted at any cost to preserve the root system and the above-ground portion of the tree. Good TOE, with a 70% or better overall condition rating as determined by the City Arborist. Tree may be lopsided or leaning, G but provides good benefit(s) to the property and users of the property (e.g. shade, wildlife, sight-line screening, etc.). Good Species with long life expectancy and/or good resistance to most pests and diseases. Tree located in a position that is correct in terms of its sun/shade/drainage needs. Tree may or may not have been correctly pruned in the past. Applicant's project team should seriously consider site plan redesign to work around the tree's root system and above-ground canopy. Moderate TOE. Tree may be significantly damaged by past pruning. Tree may exhibit pest and disease issues that are not M curable through current known treatments. Tree may exhibit non-correctable structural issues. Species may be relatively Moderate short-lived or have a limited remaining useful life expectancy. Placement of tree may be incorrect in terms of high voltage power line conflicts, slow drainage, sun/shade requirements, etc. Consider allowing the applicant to remove the tree to achieve proposed site work goals. Tree has potentially serious structural and/or health issues that are not correctable through current known treatments (e.g. a very large diameter girdling root, a serious bark inclusion at a large diameter mainstem fork that is prone to catastrophic p splitout, etc.). Tree may be growing vertically up into high voltage electric wires. Tree may be a species that is undesirable in Poor terms of its low relative wood strength, short lifespan (e.g. a colonizing species such as white alder), etc. Tree may be at the end of its expected lifespan, and is in a spiral of decline. Tree root system may be in conflict with existing buildings, infrastructure, etc. Staff is encouraged to allow applicant to remove tree to achieve site plan work goals (though the tree may still be useful as a property boundary wildlife tree for raptors, songbirds, raccoons, foxes, etc.). Roughly 0% to 20% overall condition rating. Tree in active declining stage with no possibility of recovery in terms of health VP (vigor) or structure. Tree may have a visible high risk of tree part failure and impact with life and/or property. Tree has little Very Poor remaining useful lifespan. Removal of tree is encouraged as needed to achieve site plan work goals. Tree may still have some use as a sight-line screen and/or wildlife element if retained near the property boundary or far from residential structures and roadways. 34of36 Site Address: 258 Union Ave., Los Gatos, CA Version: 7/2112018 Registered Member. American Society of Consulting Arborists and Member of the International Society of Arboriculture @ Walter Levison 2018 All Rights Reserved ~lb Walter Levison r CONSULTING ARBORIST A~. ASCA Registered Consulting Arborlst #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #VVE-3172A Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com 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 !SA-Certified 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. All 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 all current ANSI A300 standards. MON: A Project Arborist must be present to monitor specific work as noted for each tree. Site Address: 258 Union Ave., Los Gatos, CA Registered Member, American Society of Consulting Arborisls and Member of the International Society of Arboriculture ¢l Waller Levison 2018 All Rights Reserved 35 of 36 Version: 7/21/2018 ,Jb Walter Levison r CONSULTING ARBORIST ~\. ASCA Registered Consulting Arborist #401 / ISA Tree Risk Assessment Qualified/ ISA Certified Arborist #V\'E-3172A Cell: (415) 203-0990 / Email: walterslevisonjr@yahoo.com 12.0 Attached: Tree Location & Protection Fence Map Mark-up The CTA marked up the applicant's sheet A.03 dated June 29, 2018, by Dahlin of Pleasanton, California,. The CTA added the following color-coded items to this sheet for reference purposes: a. were in the case of this particular site not added to the tree map to indicate chain link protection fencing routes, since it is not clear as to which trees are actually going to be retained, and where fencing would actually be able to be erected without directly conflicting with site work. b. !C loudin g in black lines! indicates the rough-approximate canopy driplines of the CTA's survey trees #5 and #11. (Per the CTA's canopy dimensions as visually determined during the field assessment). Site Address: 258 Union Ave., Los Gatos, CA Registered Member. American Society of Consulting Arborists and Member of the lntemational Society of Art>oriculture ~ Walter Levison 2018 All Rlgits Reserved 36 of 36 Version: 7/21/2018 EXISTING TREES /--, ..,...,.....,.. .~ '"-.,-~ --.... / / PARKING LOT OPEN S~ACE 85'-0"- b TREE~J ~r \ <D r:. 1 4'-6" 20'-0" MIN. L __ _ SIDE SETBACK I I UNIT 7d OFFICE (UNIT 7a) I I / L\\- 6'-0" \ \1 ~ } Approximate actual canopy dripline 258 UNION AVENUE IN LOS GATOS CA EW REAL ESTATE, LLC 3'-0" OUGH PLOT OF TREE 15 221'-0" ' 'l_l ..-.OUGH PLOT OF TREE 14 UNIT4 -=:::] UNIT5 -=:::] "' -. ' 5'-0" TYP. Cl CL ~~ -==::::::::J z 0 I-i= <( () o.:Y.l ~~ b a. ~5 a::: <( z 1-8 ;u b <( () -· .w ,IJ'> 0.. -, >-0 I-a::: 1:,0.. ~5 a::: <( UNIT 3 UNIT2 11~~ ~ 5'-0" SETBACK (O' MIN.) 4'-0" TYP. UNIT 1 ~ () :i ca ~Iii -=:::] I 2'·0" ,...~TYP. ~ ~ 0(1') _, 1- "'Z ~a UNIT6 TYP. LADDER LOCATION II 20'-0" EXIT DISCHARGE .-···~ iff: •' ~:i~--~l -r'--T-<•EE\2 •' \ :\ _r' ! ' 0 ~ ..,- ------'- DAHLIN SITE PLAN DAT! 06-21·11 JO&NO.,_ ,1s.010 5865 Owens Drive Pleasanton, CA 94598 925-251-7200 NEB A.03