The URL can be used to link to this page

Item 4 - Exhibit 10 - Consulting Arborist's Report, dated October 10, 2019Tree Inventory, Assessment, and Protection Report 16940 Roberts Road Los Gatos, CA 95032 Prepared for: Town of Los Gatos October 10, 2019 Prepared By: Richard Gessner ASCA - Registered Consulting Arborist ® #496 ISA - Board Certified Master Arborist® WE-4341B ISA - Tree Risk Assessor Qualified EXHIBIT 10 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Table of Content Summary 1 ............................................................................................................... Introduction 1 ........................................................................................................... Background 1 ............................................................................................................ Assignment 1 ............................................................................................................. Limits of the assignment 1 ........................................................................................ Purpose and use of the report 2 ................................................................................ Observations 2 ......................................................................................................... Tree Inventory 2 ......................................................................................................... Analysis 4 ................................................................................................................. Discussion 5 ............................................................................................................. Condition Rating 5 ..................................................................................................... Suitability for Conservation 6 .................................................................................... Expected Impact Level 7 ........................................................................................... Mitigation for Removals 8 .......................................................................................... Tree Protection 9 ....................................................................................................... Conclusion 9 ............................................................................................................ Recommendations 10 ............................................................................................. Pre-construction and Planning Phase 10 .................................................................. Driveway Construction 11 ......................................................................................... Bibliography 12 ........................................................................................................ Glossary of Terms 13 ............................................................................................... Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 1 3 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Appendix A: Tree Inventory Map and Site Plan 15 ................................................ Appendix B: Tree Inventory and Assessment Tables 16 ...................................... Appendix C: Photographs 18 .................................................................................. C1: Cedars #378, #389 on adjacent site 18 .............................................................. C2: Coast redwoods #391 and #392 on the adjacent site 19 ................................... C3: Coast live oak #395 on the adjacent site and birch #396 and #397 20 .............. C4: Coast live oak #395 on adjacent site 21 ............................................................. C5: Trees #390, #392, #393, and #394 22 ................................................................. C6: Japanese maples #387 and #388 23 .................................................................. Appendix D: Tree Protection Guidelines 24 ........................................................... Plan Sheet Detail S-X (Type I) 24 ............................................................................... Plan Sheet Detail S-Y (Type III) 25 ............................................................................. Section 29.10.1005. - Protection of Trees During Construction 26 ........................... Tree Protection Zones and Fence Speciﬁcations 26 ................................................. All persons, shall comply with the following precautions 26 ..................................... Monitoring 27 ............................................................................................................ Root Pruning 27 ......................................................................................................... Boring or Tunneling 28 ............................................................................................... Tree Pruning and Removal Operations 28 ................................................................. Appendix E: Tree Protection Signs 29 .................................................................... E1: English 29 ............................................................................................................ E2: Spanish 30 ........................................................................................................... Qualiﬁcations, Assumptions, and Limiting Conditions 31 ................................... Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 2 3 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Certiﬁcation of Performance 32............................................................................. Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 3 3 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Summary The plans indicate the entire site will be demolished and new residences are to be constructed. Six trees originate on the adjacent sites. Twelve trees are in good condition and eight fair with five of the trees in good shape originating on the adjacent site. Five trees have fair suitability, nine poor, and six originate on the adjacent site and their suitability is not relevant. All fourteen trees originating on the site will be highly impacted and caused to be removed. Two trees going on the adjacent site #378 and #379 will be moderate to highly impacted by the construction driveway ingress/egress. The remaining trees originating on the adjacent property will not be affected. Because all fourteen trees will be removed there will be required replacements. Tree protection for this project will focus on avoiding soil impacts in the property setback. A total of 20 trees were appraised for a rounded depreciated value of $67,010.00 using the Trunk Formula Method. Introduction Background The Town of Los Gatos asked me to assess the site, trees, and proposed footprint plan, and to provide a report with my findings and recommendations to help satisfy planning requirements. Assignment •Provide an arborist’s report including an assessment of the trees within the project area and on the adjacent sites. The assessment is to include the species, size (trunk diameter), condition (health, structure, and form), and suitability for preservation ratings. Affix aluminum number tags on the trees for reference on site and on plans. •Provide tree protection specifications, guidelines, and impact ratings for those affected by the project. •Provide appraised values using the Cost Approach and Trunk Formula Method. Limits of the assignment •The information in this report is limited to the condition of the trees during my inspection on July 19, 2019. No tree risk assessments were performed. •Tree heights and canopy diameters are estimates. •The most recent Guide to Plant Appraisal, Tenth Edition was published in late 2018 by the ISA. The Guide is not functional at this time due to significant errors in the original printed version and gaps in information regarding regional species characteristics and nursery stock wholesale costs. Therefore the ninth edition and its supplemental publications was used for this assignment with the exception of the “condition ratings” assessment. Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 1 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 •The plans reviewed for this assignment were as follows (Table 1) Purpose and use of the report The report is intended to identify all the trees within the plan area that could be affected by a project. The report is to be used by the Town of Los Gatos and the property owners as a reference for existing tree conditions to help satisfy planning requirements. Observations Tree Inventory The inventory consists of trees protected by the Town of Los Gatos located on site and those in close proximity on neighboring properties. Sec. 29.10.0960. - Scope of protected trees. All trees which have a four-inch or greater diameter (twelve and one half-inch circumference) of any trunk, when removal relates to any review for which zoning approval or subdivision approval is required. (Appendix A and B). Los Gatos Town Ordinance 29.10.0970 Exceptions (1) states the following: “A fruit or nut tree that is less than eighteen (18) inches in diameter (fifty-seven-inch circumference). The plans indicate the entire existing structures will be demolished and new residences are to be constructed. No features are to remain on the site including the existing trees.  Table 1: Plans Reviewed Checklist Plan Date Sheet Reviewed Source Existing Site Topographic Proposed Site Plan 05/15/19 A0 Yes Josephine Chang Architect Demolition Plan Erosion Control May 2019 C2 Yes Westfall Engineers Grading and Drainage May 2020 C1 Yes Westfall Engineers Utility Plan and Hook-up locations Exterior Elevations Landscape Plan 05/15/19 L1 Yes Josephine Chang Architect Irrigation Plan T-1 Tree Protection Plan Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 2 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 The inventory contains 20 trees comprised of 14 different species. One oak is considered Large Protected and none are Exempt . 1 2 The chart below list the species and their relative quantities (Chart 1). Large protected tree means any oak (Quercus spp.), California buckeye (Aesculus californica), or Paciﬁc madrone (Arbutus menziesii) which has a 24-inch or 1 greater diameter (75-inch circumference); or any other species of tree with a 48-inch or greater diameter (150-inch circumference). A fruit or nut tree that is less than eighteen (18) inches in diameter (ﬁfty-seven-inch circumference).2 Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 3 32 Quantity 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Analysis Tree appraisal was performed according to the Council of Tree & Landscape Appraisers Guide for Plant Appraisal 9th Edition, 2000 (CLTA) along with Western Chapter International Society of Arboriculture Species Classification and Group Assignment, 2004. The trees were appraised using the “Cost Approach” and more specifically the “Trunk Formula Method” (Appendix B). “Trunk Formula Method” is calculated as follows: Basic Tree Cost = (Appraised tree trunk increase X Unit tree cost + Installed tree cost) Appraised Value = (Basic tree cost X Species % X Condition % X Location %). The trunk formula valuations are based on four tree factors; species, size (trunk cross sectional area), condition, and location. There are two steps to determine the overall value. The first step is to determine the “Basic Tree Cost” based on size and species rating which is determined by the Species Classification and Group Assignment, 2004 Western Chapter Regional Supplement. The second part is to depreciate the value according to the location and condition of the trees. The condition assessment and percentages are defined in the “Condition Rating” section of this report. The condition ratings deviate from the Guide’s condition assessment numerical rating system. The reason for this deviation is the Guide’s assessment criteria fails to account for significant health or structural issues creating high percentages for tree with either significant structural defects or health problems that could ultimately lead to failure or irreversible decline. Location rating is an average of three factors; site, contribution, and placement. Site is determined by the relative property value where the trees are planted. The residential site would be classified as “very high” value with a 90 percent rating compared to similar sites in the area (ISA, 2000). Contribution and placement is determined by the function and aesthetics the trees provide for the site and their location on the property. The percent of contribution and placement can range from 10 to 100 percent depending on the trees influence to the value of the property. These percentages ranged from 0 to 90 percent in my assessment. A total of 20 trees were appraised for a rounded depreciated value of $67,010.00 using the Trunk Formula Method (Appendix B). Six trees originate on the adjacent sites.  Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 4 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Discussion Condition Rating A tree’s condition is a determination of its overall health, structure, and form. The assessment considered all three criteria for a combined condition rating. •100% - Exceptional = Good health and structure with significant size, location or quality. •61-80% - Good = Normal vigor, well-developed structure, function and aesthetics not compromised with good longevity for the site. •41-60 % - Fair = Reduced vigor, damage, dieback, or pest problems, at least one significant structural problem or multiple moderate defects requiring treatment. Major asymmetry or deviation from the species normal habit, function and aesthetics compromised. •21-40% - Poor = Unhealthy and declining appearance with poor vigor, abnormal foliar color, size or density with potential irreversible decline. One serious structural defect or multiple significant defects that cannot be corrected and failure may occur at any time. Significant asymmetry and compromised aesthetics and intended use. •6-20% - Very Poor = Poor vigor and dying with little foliage in irreversible decline. Severe defects with the likelihood of failure being probable or imminent. Aesthetically poor with little or no function in the landscape. •0-5% - Dead/Unstable = Dead or imminently ready to fail. Twelve trees are in good condition and eight fair (Chart 2). Five of the trees in good shape originate on the adjacent site.   Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 5 32 Quantity 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Suitability for Conservation A tree’s suitability for conservation is determined based on its health, structure, age, species and disturbance tolerances, proximity to cutting and filling, proximity to construction or demolition, and potential longevity using a scale of good, fair, or poor (Fite, K, and Smiley, E. T., 2016). Trees with good suitability have good vigor, structural stability, and potential longevity after construction. •Good = Trees with good health, structural stability and longevity. •Fair = Trees with fair health and/or structural defects that may be mitigated through treatment. These trees require more intense management and monitoring, and may have shorter life spans than those in the good category. •Poor = Trees in poor health with significant structural defects that cannot be mitigated and will continue to decline regardless of treatment. The species or individual may possess characteristics that are incompatible or undesirable in landscape settings or unsuited for the intended use of the site. Five trees have fair suitability, nine poor, and six originate on the adjacent site and their suitability is not relevant (Chart 3).  Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 6 32 Quantity 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Expected Impact Level Impact level defines how a tree may be affected by construction activity and proximity to the tree, and is described as low, moderate, or high. The following scale defines the impact rating: •Low = The construction activity will have little influence on the tree. •Moderate = The construction may cause future health or structural problems, and steps must be taken to protect the tree to reduce future problems. •High = Tree structure and health will be compromised and removal is recommended, or other actions must be taken for the tree to remain. The tree is located in the building envelope. All fourteen trees originating on the site will be highly impacted and caused to be removed. Two trees going on the adjacent site #378 and #379 will be moderate to highly impacted by the construction driveway ingress/egress. The remixing trees originating on the adjacent property will not be affected (Chart 4).  Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 7 32 Quantity 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Mitigation for Removals The table below indicates the recommended replacement values (Table 3). Alternatively it may be possible to create an approved landscape plan or provide an in-lieu payment. 1To measure an asymmetrical canopy of a tree, the widest measurement shall be used to determine canopy size. 2Often, 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. 4Replacement 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. Because all fourteen trees will be removed there will be required replacements.  Table 3: Town of Los Gatos Tree Canopy - Replacement Standard Canopy Size of Removed Tree (1) Replacement Requirement (2)(4) Single Family Residential Replacement Option (3)(4) 10 feet or less Two 24 inch box trees Two 15 gallon trees More than 10 feet to 25 feet Three 24 inch box trees Three 15 gallon trees More than 25 feet to 40 feet Four 24 inch box trees or two 36 inch box trees Four 15 gallon trees More than 40 feet to 55 feet Six 24 inch box trees; or three 36 inch box trees Not available Greater than 55 feet Ten 24 inch box trees; or ﬁve 36 inch box trees Not available Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 8 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Tree Protection Typically there are three different tree protection schemes which are called Type I, Type II and Type III trunk protection only. Tree protection focuses on avoiding damage to the roots, trunk, or scaffold branches (Appendix D). The most current accepted method for determining the TPZ is to use a formula based on species tolerance, tree age/vigor, and trunk diameter (Matheny, N. and Clark, J. 1998) (Fite, K, and Smiley, E. T., 2016). Preventing mechanical damage to the trunk from equipment or hand tools can be accomplished by wrapping the main stem with straw wattle or using vertical timbers (Appendix D). Both the ISA Best Management Practices: Root Management, 2017 and ISA Best Management Practices: Managing trees during construction, second edition, 2016 indicate linear cuts should be beyond six times the trunk diameter distance when affected on only one side. Tree protection for this project will focus on avoiding soil impacts in the property setback. It may be necessary to prune the coast live oak 395. Conclusion The plans indicate the entire existing structures will be demolished and new residences are to be constructed. Six trees originate on the adjacent sites. Twelve trees are in good condition and eight fair with five of the trees in good shape originating on the adjacent site. Five trees have fair suitability, nine poor, and six originate on the adjacent site and their suitability is not relevant. All fourteen trees originating on the site will be highly impacted and caused to be removed. Two trees going on the adjacent site #378 and #379 will be moderate to highly impacted by the construction driveway ingress/egress. The remaining trees originating on the adjacent property will not be affected. Because all fourteen trees will be removed there will be required replacements. Tree protection for this project will focus on avoiding soil impacts in the property setback. Tree protection for this project will focus on avoiding soil impacts in the property setback. A total of 20 trees were appraised for a rounded depreciated value of $67,010.00 using the Trunk Formula Method.  Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 9 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Recommendations Pre-construction and Planning Phase 1.Place tree numbers and tree protection fence locations and guidelines on the plans including the grading, drainage, and utility plans. Create a separate plan sheet that includes all protection measures labeled “T-1 Tree Protection Plan.” 2.Place tree protection fence in the setback near the adjacent trees at a radial distance of 6 to 12 times the trunk diameter distances (Table 2). 3.Provide a landscape plan that accounts for the loss in tree canopy to include in tabular form the required replacements in accordance with the Town’s Tree Canopy Replacement Standard. 4.All tree maintenance and care shall be performed by a qualified arborist with a C-61/D-49 California Contractors License. Tree maintenance and care shall be specified in writing according to American National Standard for Tree Care Operations: Tree, Shrub and Other Woody Plant Management: Standard Practices parts 1 through 10 and adhere to ANSI Z133.1 safety standards and local regulations. All maintenance is to be performed according to ISA Best Management Practices. Table 2: Tree Protection Radii Tree Species Number Trunk Diameter (in.)6 x DBH (ft.)8 x DBH (ft.)12 x DBH (ft.) coast redwood (Sequoia sempervirens)381 20 10 13 20 coast redwood (Sequoia sempervirens)382 20 10 13 20 Pittosporum (Pittosporum eugenoides)386 8, 8 5 6 9 coast live oak (Quercus agrifolia)395 40 20 27 40 deodar cedar (Cedrus deodara)378 39 20 26 39 incense cedar (Calocedrus decurrens)379 28 14 19 28 Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 10 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 5.Refer to Appendix D for general tree protection guidelines including recommendations for arborist assistance while working under trees, trenching, or excavation within a trees drip line or designated TPZ/CRZ. 6.Provide a copy of this report to all contractors and project managers, including the architect, civil engineer, and landscape designer or architect. It is the responsibility of the owner to ensure all parties are familiar with this document. 7.Arrange a pre-construction meeting with the project arborist or landscape architect to verify tree protection is in place, with the correct materials, and at the proper distances. Driveway Construction Both the construction and permanent driveway near Unit 1 is close to the property boundary and adjacent to #378 and #379. For the construction driveway the contractor could place steel road plate over the soil surface on top of 6 inches of wood chips or use railroad ties as a bridge, and then place any erosion control material on top of that to avoid unnecessary compaction. The final driveway appears to be concrete. The design needs to minimize soil excavation and compaction as best as possible. The first priority for the driveway construction is to adopt a no dig policy and incorporate a design plan that will minimize soil compaction and root disturbances under the trees. Use the thinest material possible to achieve structural compliance and use porous material that allows for water infiltration under the surface if possible. Adjust the finished grade to be above the natural grade without digging for a sub-grade treatment. In this instance the pavement will be higher up and edge treatments or curbing also need to be constructed above grade. Use paving material that does not rely on the strength of a compacted sub-base for strength. This may be accomplished by reinforcing the surface layer material like monolithic concrete slabs or reinforced concrete. Place geotextile fabric at the bottom of the sub-base to reduce displacement into the parent soil along with a reduction in compaction requirements. Use biaxial Tensar BX-1100 or equivalent to manufacturer specifications on grade. There are other options for the driveway under the existing trees which include open form pavers such as Grasspave®, Grass-cel®, or other porous paving grids. These can be placed on grade within the TPZ or CRZ allowing water and air to move to the native soil reducing compaction and the need for sub-base treatments. Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 11 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Bibliography American National Standard for Tree Care Operations: Tree, Shrub and Other Woody Plant Management : Standard Practices (Management of Trees and Shrubs During Site Planning, Site Development, and Construction)(Part 5). Londonderry, NH: Secretariat, Tree Care Industry Association, 2012. Print. Costello, Laurence Raleigh, Bruce W. Hagen, and Katherine S. Jones. Oaks in the urban landscape: selection, care, and preservation. Oakland, CA: University of California, Agriculture and Natural Resources, 2011. Print. Fite, Kelby, and Edgar Thomas. Smiley. Managing trees during construction, second edition. Champaign, IL: International Society of Arboriculture, 2016. ISA. Guide For Plant Appraisal 9th Edition. Savoy, IL: International Society of Arboriculture, 2000. Print. ISA. Guide For Plant Appraisal 10th Edition. Savoy, IL: International Society of Arboriculture, 2018. Print. ISA. Species Classification and Group Assignment, 2004 Western Chapter Regional Supplement. Western Chapter ISA Matheny, Nelda P., Clark, James R. Trees and development: A technical guide to preservation of trees during land development. Bedminster, PA: International Society of Arboriculture1998. Smiley, E, Matheny, N, Lilly, S, ISA. Best Management Practices: Tree Risk Assessment: International Society of Arboriculture, 2017. Print Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 12 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Glossary of Terms Basic Tree Cost: The cost of replacement for a perfect specimen of a particular species and cross sectional area prior to location and condition depreciation. Cost Approach: An indication of value by adding the land value to the depreciated value of improvements. Defect: An imperfection, weakness, or lack of something necessary. In trees defects are injuries, growth patterns, decay, or other conditions that reduce the tree’s structural strength. Diameter at breast height (DBH): Measures at 1.4 meters (4.5 feet) above ground in the United States, Australia (arboriculture), New Zealand, and when using the Guide for Plant Appraisal, 9th edition; at 1.3 meters (4.3 feet) above ground in Australia (forestry), Canada, the European Union, and in UK forestry; and at 1.5 meters (5 feet) above ground in UK arboriculture. Drip Line: Imaginary line defined by the branch spread or a single plant or group of plants. The outer extent of the tree crown. Form: describes a plant’s habit, shape or silhouette defined by its genetics, environment, or management. Health: Assessment is based on the overall appearance of the tree, its leaf and twig growth, and the presence and severity of insects or disease. Mechanical damage: Physical damage caused by outside forces such as cutting, chopping or any mechanized device that may strike the tree trunk, roots or branches. Scaffold branches: Permanent or structural branches that for the scaffold architecture or structure of a tree. Straw wattle: also known as straw worms, bio-logs, straw noodles, or straw tubes are man made cylinders of compressed, weed free straw (wheat or rice), 8 to 12 inches in diameter and 20 to 25 feet long. They are encased in jute, nylon, or other photo degradable materials, and have an average weight of 35 pounds. Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 13 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Structural evaluation: focused on the crown, trunk, trunk flare, above ground roots and the site conditions contributing to conditions and/or defects that may contribute to failure. Tree Protection Zone (TPZ): Defined area within which certain activities are prohibited or restricted to prevent or minimize potential injury to designated trees, especially during construction or development. Tree Risk Assessment: Process of evaluating what unexpected things could happen, how likely it is, and what the likely outcomes are. In tree management, the systematic process to determine the level of risk posed by a tree, tree part, or group of trees. Trunk: Stem of a tree. Trunk Formula Method: Method to appraise the monetary value of trees considered too large to be replaced with nursery or field grown stock. Based on developing a representative unit cost for replacement with the same or comparable species of the same size and in the same place, subject to depreciation for various factors. Contrast with replacement cost method. Volunteer: A tree, not planted by human hands, that begins to grow on residential or commercial property. Unlike trees that are brought in and installed on property, volunteer trees usually spring up on their own from seeds placed onto the ground by natural causes or accidental transport by people. Normally, volunteer trees are considered weeds and removed, but many desirable and attractive specimens have gone on to become permanent residents on many public and private grounds. Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 14 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Appendix A: Tree Inventory Map and Site Plan   Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 15 32 378 379 380 381 382 383 384 385 386 387 388 389 390391 392 393 394 395 396 397X—X—X—X—X—X—X—X—X_-X—X—X—X—TPZ Fence 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Appendix B: Tree Inventory and Assessment Tables Table 3: Tree Inventory and Assessment Summary Tree Species Number Trunk Diamet er (in.) ~ Height (ft.) ~ Canopy Diameter (ft.) Condition Suitability Expected Impact Rounded Value Large Protected Tree deodar cedar (Cedrus deodara)378 39 65 50 Good N/A Moderate- High $16,800.00 No incense cedar (Calocedrus decurrens) 379 28 65 35 Good N/A Moderate- High $9,400.00 No plum (Prunus sp.)380 4 25 25 Good Poor High $190.00 No coast redwood (Sequoia sempervirens) 381 20 65 35 Good N/A Low $3,910.00 No coast redwood (Sequoia sempervirens) 382 20 65 35 Good N/A Low $3,910.00 No loquat (Eriobotrya japonica)383 2, 2, 2 20 20 Good Poor High $210.00 No plum (Prunus cerasifera)384 8 20 15 Good Poor High $600.00 No plum (Prunus cerasifera)385 8 20 15 Good Poor High $600.00 No Pittosporum (Pittosporum eugenoides) 386 8, 8 35 35 Good N/A Low $6,600.00 No Japanese maple (Acer palmatum) 387 4, 4 20 20 Fair Fair High $250.00 No Japanese maple (Acer palmatum) 388 8 20 20 Fair Fair High $1,200.00 No trident maple (Acer buergerianum) 389 6 20 20 Fair Fair High $560.00 No Laurel (Laurus nobilis)390 8 15 15 Fair Fair High $940.00 No Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 16 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 pear (Pyrus x calleryana.)391 9 35 20 Fair Fair High $830.00 No queen palm (Syagrus romanzofﬁana) 392 10 15 15 Good Poor High $2,130.00 No camphor (Cinnamomum camphora) 393 2, 2, 2, 2, 2 15 15 Fair Poor High $1,700.00 No pear (Pyrus sp.)394 4, 3 15 15 Fair Poor High $200.00 No coast live oak (Quercus agrifolia) 395 40 65 55 Fair N/A Low $15,000.00 Yes birch (Betula pendula)396 8 35 20 Good Poor High $1,520.00 No birch (Betula pendula)397 8, 4 35 20 Good Poor High $460.00 No Tree Species Number Trunk Diamet er (in.) ~ Height (ft.) ~ Canopy Diameter (ft.) Condition Suitability Expected Impact Rounded Value Large Protected Tree Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 17 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Appendix C: Photographs C1: Cedars #378, #389 on adjacent site  Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 18 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 C2: Coast redwoods #391 and #392 on the adjacent site Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 19 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 C3: Coast live oak #395 on the adjacent site and birch #396 and #397 Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 20 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 C4: Coast live oak #395 on adjacent site Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 21 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 C5: Trees #390, #392, #393, and #394 Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 22 32 394 393 392 390 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 C6: Japanese maples #387 and #388 Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 23 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Appendix D: Tree Protection Guidelines Plan Sheet Detail S-X (Type I)  Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 24 32 TREE PROTECTION Crown drip line or other limit of Tree Protection area. See tree preservation plan for fence alignment.4'-0"Maintain existing grade with the tree protection fence unless otherwise indicated on the plans. 2" x 6' steel posts or approved equal. Tree Protection fence: High density polyethylene fencing with 3.5" x 1.5" openings; Color- orange. Steel posts installed at 8' o.c. 5" thick layer of mulch. Notes: 1- See specifications for additional tree protection requirements. 2- If there is no existing irrigation, see specifications for watering requirements. 3- No pruning shall be performed except by approved arborist. 4- No equipment shall operate inside the protective fencing including during fence installation and removal. 5- See site preparation plan for any modifications with the Tree Protection area. SECTION VIEW KEEP OUT TREE PROTECTION AREA 8.5" x 11" sign laminated in plastic spaced every 50' along the fence. URBAN TREE FOUNDATION © 2014 OPEN SOURCE FREE TO USE Tree protection fence: Fencing shall be comprised of six- foot high chain link mounted on eight- foot tall, 1 7/8-inch diameter galvanized posts, driven 24 inches into the ground. Minimum 4” thick mulch layer Crown diameter drip line distance equal to the outer most limit of foliage.Notes: •All tree maintenance and care shall be performed by a qualiﬁed arborist with a C-61/D-49 California Contractors License. Tree maintenance and care shall be speciﬁed in writing according to American National Standard for Tree Care Operations: Tree, Shrub and Other Woody Plant Management: Standard Practices parts 1 through 10 and adhere to ANSI Z133.1 safety standards and local regulations. •All maintenance is to be performed according to ISA Best Management Practices. Notes: The Tree Protection Zone (TPZ) may vary in radius from the trunk and may or may not be established at the drip line distance. See arborist’s report and plan sheet for speciﬁcations of TPZ radii.6’-0”Modiﬁed by Monarch Consulting Arborists LLC, 2019 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Plan Sheet Detail S-Y (Type III)  Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 25 32EVCHARGINGONLYEVCHARGINGONLYNOPARKINGNOPARKINGCLEAN AIRVAN POOLE.V.CLEAN AIRVAN POOLE.V.CLEAN AIRVAN POOLE.V.327 328 329329327328E1E1E1E5E5AE5CC ?W ?W ?WPLANTING PLAN BYJONI JANECKI & ASSOCIATESSEE LIBRARY PLANSGUSHEE STREET PLANTING PLAN BYJONI JANECKI & ASSOCIATESSEE LIBRARY PLANSPLANTING PLAN BYJONI JANECKI & ASSOCIATESSEE LIBRARY PLANSPARKING AND BUILDING BYTEALL MESSER ARCHITECTSEE LIBRARY PLANSPLANTING PLAN BYJONI JANECKI & ASSOCIATESSEE LIBRARY PLANSLIBRARY LANDSCAPE PLAN BYJONI JANECKI & ASSOCIATES L.O.W.L.O.W.L.O.W.L.O.W.L.O.W.L.O.W.L.O.W.L.O.W.L.O.W.L.O.W.L.O.W.L.O.W.BULL CREEK FLOWLINEFUTURELIBRARY XXXXXXXXXXXXXXXXXX X X X X X X X X X KIRBY STREETXXXSEE L2.0 MATERIALS PLAN FOR DISCOVERY PARKIMPROVEMENTSSEE L2.0 MATERIALS PLAN FOR DISCOVERY PARKIMPROVEMENTS (E) CHAINLINKFENCE AND GATETO REMAIN APPROXIMATE LIMIT OF WORK (L.O.W.)LEGEND (E) TREE TO BE PROTECTED(E) TREE TO REMAINNOTE:1.SEE C3.0 EROSION CONTROL PLAN FOR TREEPROTECTION IN EXISTING RIPARIAN AREA.2.TREE SURVEY PROVIDED BY IFLAND SURVEY, 10/09/18.3.CONTRACTOR SHALL PROTECT ALL TREES WHICH ARELOCATED WITHIN 10' OF EQUIPMENT MOVEMENT.1L1.0(E) FENCE TO BE REMOVEDARBORIST NOTES:1.ALL TREE MAINTENANCE AND CARE SHALL BEPERFORMED BY A QUALIFIED ARBORIST WITH AC-61/D-49 CALIFORNIA CONTRACTORS LICENSE. TREEMAINTENANCE AND CARE SHALL BE SPECIFIED INWRITING ACCORDING TO AMERICAN NATIONALSTANDARD FOR TREE CARE OPERATIONS: TREE, SHRUBAND OTHER WOODY PLANT MANAGEMENT: STANDARDPRACTICES PARTS 1 THROUGH 10 AND ADHERE TO ANSIZ133.1 SAFETY STANDARDS AND LOCAL REGULATIONS.ALL MAINTENANCE IS TO BE PERFORMED ACCORDINGTO ISA BEST MANAGEMENT PRACTICES.2.TREE PRUNING - IF TREE PRUNING FOR OVERHEADCLEARANCE IS REQUIRED OR NECESSARY PRUNINGSPECIFICATIONS SHALL BE IN WRITING PRIOR TO ANYCUTTING. CUTTING SHALL BE PERFORMED BY AQUALIFIED TREE CARE PROFESSIONAL OR SUPERVISEDBY THE PROJECT ARBORIST. NO LIMBS GREATER THANFOUR INCHES (4”) IN DIAMETER SHALL BE REMOVEDWITHOUT APPROVAL.3.ROOT MANAGEMENT - PRIOR TO REMOVING ROOTSGREATER THAN TWO INCHES (2”) IN DIAMETER EACH TREE SHALL BE EVALUATED BY THE PROJECT ARBORIST TO HELP DETERMINE ITS LIKELIHOOD OF FAILURE AFTER ROOT LOSS. IF ROOTS OVER TWO INCHES IN DIAMETER ARE ENCOUNTERED THEY SHOULD BE PRUNED BY HAND WITH LOPPERS, HANDSAW, RECIPROCATING SAW, OR CHAIN SAW RATHER THAN LEFT CRUSHED OR TORN. ROOTS SHOULD BE CUT BEYOND SINKER ROOTS OR OUTSIDE ROOT BRANCH JUNCTIONS AND BE SUPERVISED BY THE PROJECT ARBORIST. WHEN COMPLETED, EXPOSED ROOTS SHOULD BE KEPT MOIST WITH BURLAP OR BACKFILLED WITHIN ONE HOUR. NO ROOTS SHALL BE CUT WITHIN SIX TIMES THE TRUNK DIAMETER DISTANCE IN FEET ON ONE SIDE WITHOUT ARBORIST APPROVAL. 4.TRUNK PROTECTION - PREVENTING MECHANICAL DAMAGE TO THE MAIN STEMS FROM EQUIPMENT OR HAND TOOLS CAN BE ACCOMPLISHED BY WRAPPING THE MAIN STEM WITH STRAW WATTLE. 5.SITE OCCUPANCY - HAVE A QUALIFIED ARBORIST PERFORM A LEVEL 2: BASIC TREE RISK ASSESSMENT AS DESCRIBED IN BEST MANAGEMENT PRACTICES: TREE RISK ASSESSMENT: INTERNATIONAL SOCIETY OF ARBORICULTURE, 2017 TO HELP IDENTIFY ANY NEW RISK FACTORS AFTER CONSTRUCTION UPON NEW SITE OCCUPANCY. DEMOLITION AND TREE PROTECTION PLAN L1.0 1"= 20' LANDSCAPE ARCHITECTBASE LANDSCAPE ARCHITECTUREPROJECT TEAMPROJECT NAME & ADDRESSFELTON LIBRARYDISCOVERY PARKGUSHEE STREETFELTON, CA, 95018REVISION#Date Description STAMP SHEET TITLE Scale: Date: Drawn by: Checked by: Project No.: PHASE BID SET No. 5579 Ren. 9/30/2020LICENSED A R CHI TECTST A TEOF CA L IF O RNIAAL E N DA CS P 1802 PA / AS NM 04/19/2019 CIVIL ENGINEERMME CIVIL + STRUCTURAL ENGINEERINGSAN FRANCISCO / PORTLANDwww.baselandscape.comIRRIGATION DESIGNRMA IRRIGATIONCLIENTSANTA CRUZ COUNTY DEPARTMENT OF PARKS,OPEN SPACE, AND CULTURAL SERVICES0feet40 1" = 20' 20 60 80NORTH SECTION TREE TRUNK 12" Ø STRAW FILLED BURLAP WATTLES TREE PROTECTION WITHOUT FENCE 3/8" = 1'-0"4'-0"ROOT PROTECTION ZONE. SEE SPECS FOR REQUIREMENTS 1 SCHEDULETREES TO BE PROTECTED: 20TREES TO BE REMOVED: 0 04-19-20191 Planning Review Comments1 SECTION VIEW TRUNK PROTECTION WITH WATTLES-Y 6’-0” 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Section 29.10.1005. - Protection of Trees During Construction Tree Protection Zones and Fence Speciﬁcations 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 ten-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 III: 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 two-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, III 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 eight and one-half-inch by eleven-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.” Text on the signs should be in both English and Spanish (Appendix E).   All persons, shall comply with the following precautions Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 26 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 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 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 dripline 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. Monitoring Any trenching, construction or demolition that is expected to damage or encounter tree roots should be monitored by the project arborist or a qualified ISA Certified Arborist and should be documented. The site should be evaluated by the project arborist or a qualified ISA Certified Arborist after construction is complete, and any necessary remedial work that needs to be performed should be noted. Root Pruning Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 27 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Roots greater than two inches in diameter shall not be cut. When roots over two inches in diameter are encountered and are authorized to be cut or removed, they should be pruned by hand with loppers, handsaw, reciprocating saw, or chain saw rather than left crushed or torn. Roots should be cut beyond sinker roots or outside root branch junctions and be supervised by the project arborist. When completed, exposed roots should be kept moist with burlap or backfilled within one hour. Boring or Tunneling Boring machines should be set up outside the drip line or established Tree Protection Zone. Boring may also be performed by digging a trench on both sides of the tree until roots one inch in diameter are encountered and then hand dug or excavated with an Air Spade® or similar air or water excavation tool. Bore holes should be adjacent to the trunk and never go directly under the main stem to avoid oblique (heart) roots. Bore holes should be a minimum of three feet deep. Tree Pruning and Removal Operations All tree pruning or removals should be performed by a qualified arborist with a C-61/D-49 California Contractors License. Treatment, including pruning, shall be specified in writing according to the most recent ANSI A-300A Standards and Limitations and performed according to ISA Best Management Practices while adhering to ANSI Z133.1 safety standards. Trees that need to be removed or pruned should be identified in the pre-construction walk through.  Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 28 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Appendix E: Tree Protection Signs E1: English  Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 29 32 Warning Tree Protection Zone This Fence Shall Not Be Removed And Is Subject To Penalty According To Town Code 29.10.1025 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 E2: Spanish   Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 30 32 Cuidado Zona De Arbol Pretejido Esta valla no podrán ser sacados Y está sujeta a sanción en función de Código Ciudad del 29.101025 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Qualiﬁcations, Assumptions, and Limiting Conditions Any legal description provided to the consultant is assumed to be correct. Any titles or ownership of properties are assumed to be good and marketable. All property is appraised or evaluated as though free and clear, under responsible ownership and competent management. All property is presumed to be in conformance with applicable codes, ordinances, statutes, or other regulations. Care has been taken to obtain information from reliable sources. However, the consultant cannot be responsible for the accuracy of information provided by others. The consultant shall not be required to give testimony or attend meetings, hearings, conferences, mediations, arbitration, or trials by reason of this report unless subsequent contractual arrangements are made, including payment of an additional fee for such services. This report and any appraisal value expressed herein represent the opinion of the consultant, and the consultant’s fee is not contingent upon the reporting of a specified appraisal value, a stipulated result, or the occurrence of a subsequent event. Sketches, drawings, and photographs in this report are intended for use as visual aids, are not necessarily to scale, and should not be construed as engineering or architectural reports or surveys. The reproduction of information generated by architects, engineers, or other consultants on any sketches, drawings, or photographs is only for coordination and ease of reference. Inclusion of said information with any drawings or other documents does not constitute a representation as to the sufficiency or accuracy of said information. Unless otherwise expressed: a) this report covers only examined items and their condition 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 structural problems or deficiencies of plants or property may not arise in the future. Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 31 32 16940 Roberts Road, Los Gatos Tree Inventory, Assessment and Protection Report October 10, 2019 Certiﬁcation of Performance I Richard Gessner, Certify: That I have personally inspected the tree(s) and/or the property referred to in this report, and have stated my findings accurately. The extent of the evaluation and/or appraisal is stated in the attached report and Terms of Assignment; That I have no current or prospective interest in the vegetation or the property that is the subject of this report, and I have no personal interest or bias with respect to the parties involved; That the analysis, opinions and conclusions stated herein are my own; That my analysis, opinions, and conclusions were developed and this report has been prepared according to commonly accepted Arboricultural practices; That no one provided significant professional assistance to the consultant, except as indicated within the report. That my compensation is not contingent upon the reporting of a predetermined conclusion that favors the cause of the client or any other party, nor upon the results of the assessment, the attainment of stipulated results, or the occurrence of any other subsequent events; I further certify that I am a Registered Consulting Arborist® with the American Society of Consulting Arborists, and that I acknowledge, accept and adhere to the ASCA Standards of Professional Practice. I am an International Society of Arboriculture Board Certified Master Arborist®. I have been involved with the practice of Arboriculture and the care and study of trees since 1998. Richard J. Gessner ASCA Registered Consulting Arborist® #496 ISA Board Certified Master Arborist® WE-4341B ISA Tree Risk Assessor Qualified Copyright © Copyright 2019, Monarch Consulting Arborists LLC. Other than specific exception granted for copies made by the client for the express uses stated in this report, no parts of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, recording, or otherwise without the express, written permission of the author. Monarch Consulting Arborists LLC - P.O Box 1010, Felton, CA 95018 831.331.8982 - rick@monarcharborist.com Page of 32 32