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RESUB-Arborist ReportShelley Towers Landscape Design Certifled Arborist, ISA, TRAO 425.923.8375 sdti ns noayah.. — April 1, 2022 Lauren Golembiewski DRT Holdings LLC 19215 92nd Ave W Edmonds, WA 98020 RE: Arborist Report for Tree Retention & Protection Plan 7509 212th St SW Edmonds, WA 98026 Dear Ms. Golembiewski, A Grand Design has prepared this report for use by Glacier Environmental Services, Inc./DRT Holdings LLC as part of the Tree Retention and Protection Plan in accordance with City of Edmonds Development Code 23.10.060 B. Tree Inventory and Identification An inventory of all onsite trees was conducted on February 14th, 2022 and is included in the attached Tree Plan. Significant trees as identified by your land surveyors were numbered with metal tags and are listed accordingly. During my site visit I measured each tree to verify the Diameter at Breast Height (DBH), and evaluate each tree's health, condition and viability. Trees that were included in the topographic survey, but measured under 6-inches or were dead, have been removed from the inventory. Off -property trees and their crowns are shown on the figure but have not been assigned a number or tagged. All on -site trees were evaluated for species, size, crown spread and condition. In summary, there are a total of 77 significant trees on the project site. The diversity is low and comprised mostly of four species including: Douglas Fir (Pseudotsuga menziesii), Western Red Cedar (Thuja plicata), Pacific Madrone (Arbutus, madrona) and Arborvitae (Thuja occidentalis). Most of the trees are evergreens (predominantly Douglas firs) with diameters ranging between 10 and 30 inches. Of the 77 significant trees onsite, I have identified 11 trees as hazardous due to their poor condition and/or damage. Multiple of the trees onsite appear to have been previously topped and have since developed codominant leaders which weaken the structure of the tree and increase risk of failure. I also noted multiple trees in poor condition with large decay pockets at the base. The specific condition of each hazard tree is listed in the inventory. Several trees were noted to have significant English Ivy (Hedera helix) invasion. I understand some of these trees are outside the development area and will be further evaluated after removal of the invasive ivy. June 4, 2020 Miles Vegetation Management Plan Page 2 Tree Removal Related to Development and Impact to Remaining Trees My understanding is that redevelopment does not include the northern area of the site and those trees will remain. The majority of trees removed due to development are a large grouping in the middle of the site. Retained trees will not be impacted by the removal of the trees related to development. Protection of Trees to Remain Individual and groupings of trees that are designated to remain should be protected from construction activities. Orange snow fence should be erected and maintained around the protected areas. If excavation is planned within the critical root zone of any tree to remain, it should be done under the supervision and /or guidance of a tree professional. This may include protection of the roots with mulch and plywood or steel plates, or hand excavation. I understand that the excavation at the northern end of the site is primarily limited to grading for repaving and will be shallow. This should not impact the root systems of the nearby trees. Excavation should be done with the body of the machine outside the driplines. All spoils should be removed from within the dripline. If heavy equipment needs to traverse within the dripline, 4" of woodchips and plywood should be laid down first and then removed as soon as possible. Protection fencing should be kept in place to the extent possible during excavation and replaced as soon as possible afterwards if removed. There is one storm drain located within the dripline of tree #34, however the excavation extends less than 25% into the dripline of the tree and should not affect the health of the root system. The same conditions above should apply, excavator sit outside the dripline and do not stockpile spoils within the crown area. Disclaimer This Plan is based on readily observable and ascertainable conditions. Some information was provided by others. Tree condition evaluations were based upon visual inspections of the outward conditions of trees. Unforeseen events such as weather and construction activities can lead to tree failure, therefore A Grand Design, LLC cannot be held liable for future failure of trees either during construction or following its completion. The work for this report has conformed to the standard of care employed by ISA Certified Arborists. No other representation or warranty is made concerning the work or this report and any implied representation or warranty is claimed. If you have any additional questions, please feel free to contact me directly. Sincerely, A Grand Design Shelley Towers ISA, TRAQ Consulting Arborist ISA Certification # PN5802A A Grand Design, LLC 7914 60th Street Southwest Snohomish, Washington 98290-5127 (425) 923-8375