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Peninsula Environmental Group, Inc. 824 E. 8th St. Suite D | Port Angeles WA 98362 (360) 504-3825 | www.peninsulaeg.com WA Contractor ID: PENINEG813MC Tree Protection Plan December 20, 2024 Client Go Feasibility & Permitting LLC Property Owner VUONG HA T 14349 SE 92ND ST NEWCASTLE WA 98059 Project Information Pierce County Parcel: 3664500165 Project Address: 12820 156TH AVE SE Renton 98059 Consultant John Bornsworth ISA Board Certified Master Arborist #7955BM ASCA Registered Consulting Arborist #724 ISA Tree Risk Assessment Qualified ASCA Tree and Plant Appraisal Qualified CONTENTS 1. Summary ............................................................................................................................................... 3 2. Background ........................................................................................................................................... 4 3. Observations & Findings ....................................................................................................................... 5 4. Critical Root Zones ................................................................................................................................ 6 5. Tree Credit Density ............................................................................................................................... 7 6. Conclusions ........................................................................................................................................... 8 7. Recommendations ................................................................................................................................ 9 8. Closing ................................................................................................................................................. 10 General Assumptions & Limitations ....................................................................................................... 11 9. Appendix A. Tree Protection Standards .............................................................................................. 12 Critical Root Zone Explanation .............................................................................................................. 16 10. Appendix B: Tree Inventory ………………………………………………………………………………………………………….. 17 December 20, 2024 12820 156th Ave SE, Renton, WA Tree Protection Plan P a g e | 3 of 40 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 1. SUMMARY Peninsula Environmental (the Consultant) completed a tree inventory and subsequent Tree Retention Plan (the Plan) for Go Feasibility & Permitting LLC (the Client). This Report serves as Tree Retention Plan required by the City of Renton to permit the infill of an existing single-family development on a single city lot. The owner is proposing a boundary line adjustment (BLA) on the existing parcel, which results in three separate lots. The largest of the three lots will retain the existing single-family dwelling, while the two new lots will have SFD’s constructed. A summary of the BLA is below, and described in Tebaldi Engineering, LLC sheet 1 of 3 for the project, dated 7/5/2024. This report includes an assessment of trees on the existing property, including a condition rating, risk rating and invasiveness of all trees. Trees that require removal due to the development are identified in the attached inventory. This report also includes calculations on tree retention areas, retained tree credits, replanting quantities if necessary, and construction specifications and mitigation contained in the Tree Protection Standards for use during construction. No living Priority One trees are being removed from the property. A single landmark tree (Tree 3) is recommended for removal due to its health and associated high-risk. Tree Status Total Surveyed Trees 26 Landmark Trees 3 Significant Trees 23 Tree Condition Credits Healthy, Retained 9 35 Dead/Dying, Removed 2 N/A Removed for Construction 2 10 Location Onsite Trees 8 Offsite Trees 18 November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 4 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 2. BACKGROUND Our assessment, opinions, and recommendations are included in this report. Please contact us with questions you may have regarding this project. Assignment 1. Evaluate health and long-term survival for trees 6-inch diameter at breast height and greater on site with potential impact from construction actions. Provide recommendations on tree retention, protection and necessary care. 2. Prepare list of trees with relevant metrics and required information for City of Renton tree protection standards. 3. Complete required tree retention calculations as per the City of Renton ordinance 4-4-130. Professional Assumptions & Limitations This report summarizes the data collected during our site reconnaissance and assessment, our conversations regarding the project, and our professional opinions and recommendations. The results and recommendations of this report represent our professional opinion compiled from biological forensics, information provided to us, referenced material and our experience. Our recommendations are compiled with industry standards, best-available-science and currently accepted best management practices. Additional project specific limitations: • This report summarizes site characteristics as they were observed October 29th 2024 only. • This report is intended for the exclusive use of the Client and their agents and only for specific application to the referenced property. This report should not be applied to any other tree or other property for any purpose. • Our evaluation assesses only the trees identified within the scope of this project. Methodology: Numerous common methodologies may have been applied during the creation of this report, including, but not limited to: Matheny, N., & Clark, J. (1998). Trees and Development: A Technical Guide to Preservation of Trees During Land Development. Champaign, IL: International Society of Arboriculture. Costello, L. R., Jones, K. S. (2003) Reducing Infrastructure Damage by Tree Roots: A Compendium of Strategies. Western Chapter of the International Society of Arboriculture, Porterville, CA. Matheny, N., Smiley, E. T., Gilpin, R., & Hauer, R. (2023). Best Management Practices - Managing Trees During Construction (3rd ed.). Champaign, IL: International Society of Arboriculture. November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 5 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 3. OBSERVATIONS & FINDINGS Site is developed with a single-family home, driveway and shed. Landscape is predominantly lawn with interspersed trees. A clump of trees (Tree 2-5) exists in proposed Lot 1, to the west, while all other trees are individual trees. Tree details are in Appendix B. The eastern most area of property is blackberry brambles. A total of 8 trees are identified on site and 17 offsite trees exist that may be impacted due to construction (Tree 9-26). Some offsite trees will be impacted through construction, particularly trees to the south that are within the City of Renton street ROW. Table 1: Existing Lot Conditions: Existing Lot Pierce County Tax Parcel 366450-0165 46,576 sf Current Use Single Family(Res Use/Zone) Zoning R4-Residential 4 du/ac Table 2: Developable Area of New Lots Lot 1 (Includes existing SFD) 14,281 sf Residential Lot 2 10,299 sf Residential Lot 3 10,478 sf Residential November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 6 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 4. CRITICAL ROOT ZONES Table 3: Critical Root Zones of Retained Trees Tree Information Root Impact Tolerance Critical Root Zone Multiplier1 SRZ Radius2 CRZ Radius3 Impacts and Mitigation Tree 1 I. aquifolium DBH: 12.7” High. 0.50 with post construction irrigation 3-ft 7ft-ft Driveway to be removed and install concrete pad N of SFD. No substantial impact. Protect tree according to mitigation standards. Tree 2 C. lawsoniana DBH: 24.5” Good. Intolerant of water regime changes. 0.8 with post construction irrigation 10-ft 20-ft Proposed 5’ wide sidewalk. No impact. Protect tree according to mitigation standards. Tree 4 T. plicata DBH: 33.4” Moderate, intolerant of water regime changes. 0.75 with post construction irrigation 12-ft 25-ft Near sidewalk to south. Protect tree according to mitigation standards. Perform excavation of sidewalk in tree CRZ by hand. Tree 8 T. plicata DBH: 18” Moderate, intolerant of water regime changes. 0.75 with post construction irrigation 7-ft 14-ft Near driveway in Lot 3. No substantial impact. Protect tree according to mitigation standards. Tree 10 P. glauca DBH: 18” Tolerant of root loss, intermediate tolerance of soil saturation. 0.8 – tree offsite, no irrigation. 7-ft 14.5-ft Near SE 130th St construction. Protect tree according to mitigation standards. 1 Multiplied by Diameter at Breast Height to calculate Critical Root Zone 2 Structural Root Zone – See definitions. 3 Critical Root Zone – See definitions. November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 7 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 Tree 11 B. pendula DBH: 11.4” Moderate- Poor outside of native range. 1 – tree offsite, no irrigation. 6-ft 11.5-ft Near SE 130th St construction. 123sf of its CRZ will be permanently impacted out of 420sf (30%). Protect tree according to mitigation standards. Tree 14 T. plicata DBH: 22” Moderate, intolerant of water regime changes. 0.75 with post construction irrigation 8-ft 16.5-ft Road installation affects 99sft of CRZ, out of 855sf total (12%). Protect tree according to mitigation standards. Tree 15-26 T. plicata DBH: 8-12” Moderate, intolerant of water regime changes. 0.75 with post construction irrigation 5-ft 10-ft Trees are ~8ft to south of property line. No impact within CRZ provided 3-ft clearance between sidewalk and property line. Protect trees according to mitigation standards. 5. TREE CREDIT DENSITY Table 4: Summary of Trees within Lot 1 - 3 Lot Size Tree Credit Minimum Required Tree Credits Retained Tree Credits Installed Tree Credits Required Additional Tree Credits Lot 1 14,281 sf 30/ac 10 28 1.25 0 Lot 2 10,299 sf 30/ac 7 0 0.25 6.75 Lot 3 10,478 sf 30/ac 7 7 0.25 0 November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 8 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 6. CONCLUSIONS 1. No living Priority One trees are being removed from the property. 2. A single landmark tree (Tree 3) is recommended for removal due to its health and associated high-risk. 3. Per Renton tree codes: a minimum of 30% of significant trees shall be retained on site. a. Of 8 total trees over 6 inches on site, 4 are being retained (66%). This meets the required 30% minimum. 4. A minimum of 30 tree credits are required per acre. a. Lot 1 and Lot 3 currently meet the tree density requirements. b. Lot 2 does not meet the tree density requirements, by 6.25 trees. 5. Current engineering plans identify the installation of 8 Summer Sprite Littleleaf Linden trees (Tilia cordata 'Halka') on the western and southern parcel edges. Mature tree height is approximately 20ft, making them Small Species Trees. a. New Small Species tree’s accumulate 0.25 tree credits, resulting in a total of 4 tree credits installed as street trees. b. 1.5 tree credits within Lot 1 c. 0.25 tree credits within Lot 2 d. 0.25 tree credits within Lot 3 6. Tree impacts are described in 4. Critical Root Zones and shown on the Tree Impact Map. 7. Trees to the south, along the SE 130th St roadway will encounter some root disturbance. Tree protection fencing will be erected outside of construction limits, close to the southern edge of the sidewalk. With this, Tree 11 the silver birch, will suffer approximately 30% CRZ reduction/permant impact on the north side. TPF will be installed close to construction limits and summer watering will be scheduled after construction. 8. Data is verifiable in Tree Inventory Details below. November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 9 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 7. RECOMMENDATIONS 1. Install 3 “large species tree” and one medium species tree in Lot 2 to attain required tree density. Or another variation of required tree credits. 2. Retain and protect trees as outlined in this plan, using the Tree Map by Peninsula Environmental. 3. Install approximately 514 ft of Tree Protection Fencing, as described in Tree Protection Standards and the accompanying Tree Protection Fencing map. 4. Any further grading changes that may occur during final design need to be evaluated by Project Arborist to confirm compliance with tree retention standards. 5. Follow Appendix A. Tree Protection Standards for all construction related standards around trees, including installation of tree protection fencing, signage, and proper protection and management of retained trees. Perform post-construction mitigation on trees as per Appendix A. 6. Contact Project Arborist if retained trees are damaged or roots over 2” are severed. November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 10 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 8. CLOSING Work for this project was performed and this report prepared in accordance with generally accepted professional practices for the nature and conditions of work completed in the same or similar localities, at the time the work was performed. No warranty, expressed or implied, is made. Neither the Consultants, nor Peninsula Environmental Group, Inc., has any current or prospective interest in the plants or properties discussed. Acceptance of this report acknowledges receipt and agreement with Peninsula Environmental Groups, Inc. attached Assumptions & Limiting Conditions. Thank you for the opportunity to evaluate your project. We appreciate your business and look forward to working with you in the future. If you have questions now, or in the future, do not hesitate to contact us. John Bornsworth ISA Board Certified Master Arborist #7955BM ASCA Registered Consulting Arborist #724 ISA Tree Risk Assessment Qualified ASCA Tree and Plant Appraisal Qualified John Bornsworth is the owner and Principal at Peninsula Environmental Group, Inc., a Board-Certified Master Arborist, Registered Consulting Arborist, Municipal Arborist, Tree Risk Assessment Qualified, Tree and Plant Appraisal Qualified and Certified Erosion Control Specialist with over 20 years of urban and community forestry management experience. John specializes in urban & community forestry planning and policy; tree forensics, pathology, risk management, and providing expert witness testimony. November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 11 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 General Assumptions & Limitations 1. Any legal description provided to Consultant is assumed to be correct. Any titles and ownerships to any property are assumed to be good and marketable. Consultant assumes no responsibly for verification of ownership or locations of property lines, or for results of any actions or recommendations based on inaccurate information. It is assumed that any property is not in violation of any applicable codes, ordinances, statutes or other governmental regulations, unless explicitly stated otherwise. 2. Consultant assumes no responsibilities for legal matters in character. Consultant assumes all property appraised or evaluated is free and clear and is under responsible ownership and competent management. 3. Any evaluation or assessment carried out was restricted to the property and the plants or landscapes within the Scope of Assignment. No assessment of any other plants or landscapes has been undertaken by Consultant. The conclusions of this report do not apply to any zones, landscapes, trees, plants, or any other property not explicitly covered in the Scope of Assignment. 4. The total monetary amount of all claims or causes of action the Client may have as against Consultant, including but not limited to claims for negligence, negligent misrepresentation, and breach of contract, shall be strictly limited to solely the total amount of fees paid by the Client to Consultant pursuant to the Agreement for Services as dated for which this Assignment was carried out. Further, under no circumstance may any claims be initiated or commenced by the Client against Consultant. or any of its directors, officers, employees, contractors, agents, or Assessors, in contract or in tort, more than 12 months after the date of this Assignment. 5. Although Consultant has taken care to obtain all information from reliable sources and to verify the data insofar as possible, Consultant does not guarantee and is not responsible for the accuracy of information provided by others 6. Consultant shall not be required to testify or attend court due to any report unless mutually satisfactory contractual arrangements are made, including payment of an additional fee for such Services as described in a Consulting Arborist Agreement. 7. Unless otherwise required by law, possession of this report or a copy thereof does not imply right of publication or use for any purpose by any other than the parties to whom it is addressed, without the prior expressed written or verbal consent of the Consultant. 8. Neither all or any part of the contents of this report, nor copy thereof, shall be conveyed to anyone, including the client, to the public through advertising, public relations, news, sales or other media, without prior expressed written consent of Consultant. Particularly as to value conclusions, identify of Consultant., or any reference to any professional society or to any initialed designation conferred upon Consultant as stated in its qualifications. 9. This report and any values expressed herein represent the opinion of the Consultant, and the Consultant’s fee is in no way contingent upon the reporting of a specific value, a stipulated result, the occurrence of a subsequent event or upon any finding to be reported. 10. All photographs included in this report were taken by Consultant during the documented site visit, unless otherwise noted. 11. Sketches, drawings and photographs in this report, being intended as visual aids, are not necessarily to scale and should not be construed as engineering or architectural reports or surveys. The reproduction of any information generated by architects, engineers or other Consultants and any sketches, drawings or photographs is for the express purpose of coordination and ease of reference only. Inclusion of such information on any drawings or other documents does not constitute a representation by Consultant as to the sufficiency or accuracy of the information. 12. Unless otherwise agreed, (1) information contained in this report covers only the items examined and reflects the condition of those items at the time of inspection; and (2) the inspection is limited to visual examination of accessible items without dissection, excavation, probing, climbing, or coring. Consultant makes no warranty or guarantee, express or implied, that the problems or deficiencies of the plans or property in question may not arise in the future. 13. This report is based on the condition of the trees, landscape, or plants at the time of inspection. 14. Loss or alteration of any part of this report invalidates the entire report. This report is only valid if reproduced from a digital file. November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 12 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 9. APPENDIX A. TREE PROTECTION STANDARDS PROJECT NAME: VUONG 12820 156TH AVE Applicability: Owner, all project prime and sub-contractors. Property Parcel: King County Parcel 3664500165 1) Definitions a) Project Arborist – John Bornsworth with Peninsula Environmental. b) City Arborist – Ian Gray, or other City of Renton delegated staff. 2) Responsibilities a) These Tree Protection Specifications are applicable to all disturbance or activity within and near the Critical Root Zone of all retained trees on this project. i) The Critical Root Zone (CRZ) is the area of soil around the tree where the majority of the roots are located. The roots within this area provide stability and are responsible for the uptake of water and nutrients to maintain tree health. Any level of compaction limits root growth due to lack of available oxygen. ii) See attached Critical Root Zone Explanation for reference. b) Tree Protection Fencing (TPF) is identified on the Tree Protection Plan’s TPF detail. i) TPF length total approximately 587 linear feet. c) These Guidelines shall apply to work near protected trees provided by all contractors and sub- contractors working on the Site. d) All Tree Protection Areas and Tree Protection Fencing shall be clearly delineated on all site plans provided to the City of Renton, contractors and subcontractors. e) Educate all applicable workers on site about tree protection techniques and these requirements during preconstruction meetings. f) Share these Tree Protection Standards by posting them in entirety on the jobsite. g) Project Arborist shall be contacted prior to any work requiring entrance to tree protection fencing. Two days’ notice shall be provided to Project Arborist. A proposed method for work near any retained trees shall be provided. This method shall be reviewed by the Project Arborist and approved or commented on prior to commencing work with the TPF. h) Project Arborist should be notified within 8 hours should any (1) injury occurs to any protected trees and/or (2) roots greater than 4 inches are severed. 3) Limits of Disturbance November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 13 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 a) No disturbance, clearing, grading filling, operating heavy equipment, trenching or other earthwork activity shall occur without all plans submitted and approved by the presiding jurisdiction. b) No soil disturbance shall take place before required mitigating measures and Tree Protection Fences are installed and inspected by Project Arborist. 4) Tree Protection Fencing a) Tree Protection Fencing shall be installed immediately after the clearing limits are delineated and flagged. b) TPF shall be installed along the limitations of disturbance and no closer than 10 feet from a preserved tree. c) Once installed and inspected by Project Arborist, the TPZ shall not be moved without approval from Project Arborist. d) City Arborist may or may not require post installation inspection and approval. e) TPZ shall be constructed of at least 6-foot-tall chain link fence with cement footings at surface of grade. Do not auger and cement fence posts into ground. f) See Detail 1 attached to end of report. 5) Tree Protection Signs a) See Detail 2 attached to end of report. 6) Silt Fencing a) If a silt fence is required to be installed within a CRZ, the bottom flap of the silt fence shall not be buried in a trench but instead placed on the ground. The flap portion of the silt fence shall be covered with gravel or soil from outside the CRZ for anchorage. 7) Root Pruning a) Required work may result in the cutting of roots of retained trees. Cutting roots greater than 3 inches should be avoided. If this occurs, please consult with Project Arborist two days prior to cutting. b) Where root pruning occurs outside of TPF, but inside of the CRZ, we recommend light-machinery (~2,000lb) or hand-excavation. This is specifically for Tree 4 near the sidewalk and Tree 14 near the road install. When roots are encountered, roots will need to be pruned as described below. c) Equipment operators shall take extreme care to not grip and pull on the roots of retained trees, or any roots nearby retained trees. d) For roots <1 inch in diameter i) Provide supplemental irrigation as described below. November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 14 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 e) For roots 1-4 inches in diameter: i) Root pruning should be performed in a way to reduce root fracturing and tearing. Do not tear root with excavator. Use hand saw, reciprocating saw, or other tools to cleanly cut root. Make cut perpendicular to the root, to limit the cut size. ii) To reduce drying of cut root, place a handful of native soil into small drawstring burlap bag. Insert root into soil bag, then wrap and tie drawstring onto root. Soil bag should be secured well to cut root. (1) If multiple root tips are in the same location, they may be tied together. (2) Soil bag may remain on tree root as it will decay quickly. iii) If needed purchase it here. https://www.uline.com/BL_361/Burlap-Bags-with-Drawstrings iv) Provide supplemental irrigation as described below. f) For roots greater than 4 inches: Should be avoided. If this occurs, please consult with Project Arborist two days prior to cutting. 8) Supplemental Irrigation a) Some will require mulch and supplemental irrigation for 3 years. i) Includes Tree 14, the silver birch to the SW, and Trees 15-26, the row of western redcedar to the SE. ii) Drip irrigation recommended during July, August, September and October, or longer if soil moisture levels are low. iii) Irrigation should be applied through commercial grade drip irrigation, with a total of 1.5 drip emitters per inch of tree diameter within a 10-ft radius of the tree trunk. Install drip irrigation in concurrent circles around tree, spreading to at least 10 feet radius from the trunk, while reaching a total number of drip emitters. iv) Drip emitters should be rated at approximately 0.5 gallons per hour, with 1.5-ft spacing between emitters. Drip irrigation should be installed along the property line, and not extend into the southern neighbor. Install 2 perpendicular rows of drip irrigation at 0.5ft from property line and 2.0ft from property line, extending 15ft beyond the tree trunks east-to- west. v) Install uncomposed woodchip around trees, approximately 3-4 inches deep. Leave approximately 6 inches of room between the start of the woodchip and the tree trunk. Drip emitters should be placed below mulch. vi) Irrigation system should discharge slow enough to allow soil to absorb water without creating surface runoff. vii) Schedule: November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 15 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 Tree Watering Schedule 4 120 gallons per week, or approx. 6 hours with 40 * 0.5 GPH drip emitters. 14 120 gallons per week, or approx. 6 hours with 40 * 0.5 GPH drip emitters. 15-26 800 gallons per week, or approx. 10 hours with 156 * 0.5 GPH drip emitters. i) If temperatures rise above 90-degrees for more than 2 concurrent days, increase water cycle to every 4 days. ii) If desired, using a wireless Spiio© soil moisture measurement tool to monitor soil moisture levels after development could assist in reducing tree drought stress. Use per manufacturer direction. November 5, 2024 12820 156th Ave SE, Renton, WA Tree Retention Plan P a g e | 16 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 Critical Root Zone Explanation The Critical Root Zone (CRZ) of a tree is determined by the tree trunk DBH, tree species, and tree condition. Prescriptively and without advanced diagnostics, the CRZ is circular in shape around a tree trunk with a radius of one foot for every inch of tree diameter (Label A). Soil, hydrology, environmental conditions and tree species all influence a roots spread and depth. The outer perimeter of branches, often referred to as the dripline, does not correspond to tree root extent. Protecting the CRZ from all soil, water and root disturbance often results in limited adverse impact to the protected tree. It should be noted that the CRZ is not the full extent of tree roots. Tree roots may extend much farther. We can further differentiate the CRZ into an inner and outer perimeter. The inner perimeter can be referred to as a Structural Root Zone (SRZ; Label B). Generally speaking, the outer CRZ is made up of smaller, nutrient absorbing roots, the SRZ is made of larger, anchoring and structural roots. This SRZ radius is greater than the rootball size required to transplant subject tree. The first impact after severing roots inside the SRZ is tree stability. This normally requires extensive Post Care Treatment and stabilization with guy-wires and posts. Incursion into the CRZ with any development activity, i.e. transit, storage, grading, filling, trenching, washing, burning, etc., should be restricted. When full-restriction of the CRZ is incompatible with development plans, incursion into the CRZ should be limited depending on trees species and tree condition. Construction Mitigation includes such activities as; long periods of non-contact drip irrigation, hormonal root treatment to activate new growth, inoculating roots with mycorrhizae, mulching, and guy-wire stabilization. Multiple years of supplemental irrigation are normally required to retain large trees damaged by construction and development. A B B A TREE INVENTORY DETAILS Assessment Date: 10/21/2024 Formatted for 11x17 page Site: City of Renton – Parcel 3664500165 Report Date: 11/05/2024 P a g e | 17 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 a Tree # Status Retain/ Remove Species Name Scientific Name Notes DBH Ht. Condition Health Form Structure Lot Placement Tree Credit CRZ/SRZ 1 Significant Retain English holly Ilex aquifolium Healthy landscape tree. Can be invasive to shaded forests. 12.7 25 Good Good Good Good 1 6 8/3 2 Landmark Retain Port Orford cedar Chamaecyparis lawsoniana Healthy. Has poor form due to trunk architecture and multipole leaders. Tree is low risk, canopy branches well integrated. Note: there is an old utility pole between Tree 2 and 3. Not a habitat tree. 24.5 110 Alive Excellent Poor Good 1 10 20/8 3 Landmark Remove White spruce Picea glauca Tree is nearly dead. <30% canopy remaining. Note: Tree is shown as retained on TE civil plans dated 7/5/2024. This tree should be removed. 36 80 Dying Very Poor Good Poor 1 NA 4 Landmark Retain Western redcedar Thuja plicata Healthy tree. Has bifurcated base with multiple leaders. Canopy branches well integrated. 33.4 80 Alive Good Good Good 1 12 25/12.5 5 Significant Remove White spruce Picea glauca Tree is dead. 22 60 Dead Very Poor Good Poor 1 NA 6 Significant Remove English walnut Juglans regia Tree is growing into existing shed. Would require pruning of tree to allow future growth. Form is diminished due to this. Otherwise, healthy. 6 25 Alive Good Very Poor Poor 2 (4) NA 7 Significant Remove Western redcedar Thuja plicata Healthy. 12 40 Alive Good Good Good 3 (6) NA 8 Significant Retain Western redcedar Thuja plicata Healthy. 18 50 Alive Good Good Good 3 7 14/7 9 Significant Offsite Western redcedar Thuja plicata Owned by northern neighbor. Construction has no impact to tree. 18 50 Alive Good Good Good NA N of Lot 2 10 Significant Offsite White spruce Picea glauca Owned by southern neighbor. Road construction will impact tree. Follow protection standards. 18 30 Alive Good Good Good NA S of Lot 1 11 Significant Offsite Silver birch Betula pendula Owned by southern neighbor. Road construction will impact tree. Follow protection standards. 11.4 25 Alive Good Poor Fair NA S of Lot 1 12 Significant Offsite Big leaf maple Acer macrophyllum Owned by eastern neighbor. No impacts. 16 40 Alive Good Good Good NA E of Lot 3 13 Significant Offsite Western redcedar Thuja plicata Owned by eastern neighbor. No impacts. 18 40 Alive Good Good Good NA E of Lot 3 14 Significant Offsite Western redcedar Thuja plicata Owned by eastern neighbor. Road installation impact. 22 60 Alive Good Good Good NA E of Lot 3 15-26 Significant Offsite Western redcedar Thuja plicata Hedge (12 trees) owned by southern neighbor. Road construction will impact tree. Follow protection standards. 8- 14 60 Alive Good Fair Good NA S of Lot 2 & 3 Notes: Black text with no fill color are retained trees. Orange fields are healthy trees removed due to this plan. Red text are dead, dying, diseased, invasive or hazardous trees. Blue fields are offsite trees that may or may not be impacted due to construction. 06/19/2024 3915 MERIDIAN AVE E. EDGEWOOD, WA 98371 Tree Retention Plan P a g e | 18 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 Definitions Tree: Sequential tree number per project. DBH: Calculated diameter of tree stems. Status: Regulatory status within jurisdiction. Landmark trees are a tree with a caliper of twenty four inches (24") or greater, except for big leaf maples, black cottonwoods, and red alder trees, which qualify as landmark trees with a caliper of thirty inches (30") or greater. Significant trees are a tree with a caliper of at least six inches (6"), except alder or cottonwood trees, which qualify as significant trees with a caliper of eight inches (8") or greater. Trees certified as high-risk shall not be considered significant. Assessed Risk: ISA tree risk assessment qualification. Options: Low, Moderate, High, Imminent. Preservation Priority: Preservability rating of tree, irrespective of development plans. This rating is derived from tree’s condition rating, limitations, species factors, ecological significance, invasiveness, desirability in current location and in relation to site, species and specimen longevity, species sensitivity to construction impacts, historical context, and potentially other factors. Options: High, Good, Fair, Low. Value: Appraised value using Reproduction Cost per Guide to Plant Appraisal, 10th Edition. Tag Number: Number of metal tag placed on tree, if applicable. Average (Canopy) Radius: Average radius of canopy. Health: Table 4.1 from Guide to Plant Appraisal, 10th Edition. Options: Excellent, Good, Fair, Poor, Very Poor, Dead. Structure: Table 4.1 from Guide to Plant Appraisal, 10th Edition. Options: Excellent, Good, Fair, Poor, Very Poor, Dead. Form: Table 4.1 from Guide to Plant Appraisal, 10th Edition. Options: Excellent, Good, Fair, Poor, Very Poor, Dead. CRZ/SRZ: Critical Root Zone and Structural Root Zone as calculated by project arborist by applying known root pruning tolerances, tree conditions and environmental factors. 06/19/2024 3915 MERIDIAN AVE E. EDGEWOOD, WA 98371 Tree Retention Plan P a g e | 19 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 Figure 1: Tree 2-5. Tree 2 – Healthy, retain Tree 3 – Dead, removal Tree 4 – Healthy, retain Tree 5 – Dead, remove Tree 2 Tree 3 Tree 4 Tree 5 06/19/2024 3915 MERIDIAN AVE E. EDGEWOOD, WA 98371 Tree Retention Plan P a g e | 20 of 20 Peninsula Environmental | www.peninsulaenvironmental.com | (360) 504-3825 Figure 2:Goole Street View - Tree 2-5. Tree 2 – Healthy, retain Tree 3 – Dead, removal Tree 4 – Healthy, retain Tree 5 – Dead, remove Tree 2 Tree 3 Tree 4 Tree 5 T E B A L D I ENG I N E E R I N G, LLC TE PROPOSED DRIVEWAY PP TPED SSS T E B A L D I ENG I N E E R I N G, LLC TE PROPOSED DRIVEWAY PP TPED SSS TREE PROTECTION FENCING Crown drip line or other limit of Tree Protection area. See tree preservation plan for fence alignmen 6' - 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 Tree Protection Standards for installation procedures and further details 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 11" x 17" sign laminated in plastic spaced every 25' along fence. URBAN TREE FOUNDATION OPEN SOURCE FREE TO USE