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HomeMy WebLinkAboutArborist Report 76 W. Wistaria Ave Arcadia, CA 91007 Prepared for: Phillip Chan “PDS Studio Architect LLC” 711 S. First Ave Arcadia, CA 91006 April 22, 2019 Prepared by: Javier Cabral Consulting Arborist International Society of Arborists # WE- 8116A 1390 El Sereno Ave Pasadena, California 91103 (626)818-8704 jctcabral@sbcglobal.net Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 1 Table of contents Summary ----------------------------------------------------------------- pg. 3 Background and assignment Summary ------------------------------ pg. 3 Site Conditions & Google Earth Image ------------------------------ pg. 4 List Inventory ------------------------------------------------------------ pg. 5 Survey Map With Trees ------------------------------------------------ pg. 6 Site Plan With Trees ----------------------------------------------------- pg. 7 Tree Pictures ------------------------------------------------------------- pg. 8 thru 15 Protection Guidelines --------------------------------------------------- pg. 16 thru 22 Assumptions & Limiting Conditions Summary --------------------- pg. 23 Arborist Signature Page ------------------------------------------------ Pg. 24 Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 2 Summary Mr. Chan, You have retained my consulting arborist services to provide a tree inventory and protection plan for the property described as 76 W Wistaria Ave Arcadia, CA 91007. You are in the process of demolishing the existing single family home and redeveloping the property with a new two story single family home. The proposed demolition and construction is expected to have minimal to moderate impact to the protected trees that will remain due to the substantial distance of excavations, trenches, and footings to the tree trunks. No protected trees are proposed for removal. A complete tree protection plan will be included to protect above and below ground tree parts from physical damage, soil compaction, and chemical damage. Background and assignment PDS Studio Architect is a luxury home designing corporation that has been hired to design the proposed home and separate structures. Mr. Chan has requested that I provide the following arboricultural services. 1) Identify all trees on the property and label them on the site plan. 2) Evaluate the current health and possible impacts of the proposed construction to the trees based on the provided site plan and make recommendations. 3) Provide a tree protection plan that will help ensure the short and long term health of the protected trees during and after construction activities are completed. The following report is based on my analysis of the trees and surrounding landscape. For the purpose of this report I will address these trees as Trees # 1 thru 12. Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 3 Site conditions A one story single family home currently exists on this property located 76 W Wistaria Ave Arcadia, CA 91007 . 1) There are 12 total trees on the subject property of which 6 trees are protected due to their species, diameter, and location. 2) There are no protected trees proposed to be removed for the proposed new development and all remaining protected trees will have a protection plan to help ensure that they survive in good health. Google Earth Image Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 4 List Inventory Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 5 Survey Map With Trees (full scale) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 6 Site Plan With Trees (full scale) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 7 Trees # 1, & 2, (facing west) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 8 Tree # 1 Mondell pine DBH = 19 in. Tree # 2 Olive DBH = 36 in. Tree # 3 (facing west) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 9 Tree # 3 London plane DBH = 17 in. Dead wood Trees # 4, & 5, (facing south) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 10 Tree # 4 Olive DBH = 8-8-10-10 in. Tree # 5 Crape myrtle DBH = 4-5-6-8-10 in. Trees # 6 & 7 (facing south) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 11 Tree # 7 Brush cherry DBH = 15 in. Tree # 6 Mondell pine DBH = 14 in. Tree # 8 (facing southeast) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 12 Tree # 8 Lemon DBH = 3-5-6 in. Tree # 9 (facing south) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 13 Tree # 9 Orange DBH 2-2-2-2 in. Trees # 10 & 11 (facing west) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 14 Tree # 10 Orange DBH 2-2-3-3-4 in. Tree # 11 Orange DBH 1-1-2-2 in. Tree # 12 (facing west) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 15 Tree # 12 Yucca DBH 36 in. General Tree Protection Guidelines 1) Avoid damaging the roots, stem, and branches with mechanical and manual equipment. No roots shall be severed within the Tree Protection Zone “TPZ” which is the same as the area within the Tree Protection Fencing “TPF.” Roots greater than two inches in diameter outside of the TPZ shall be cleanly severed with a sharp tool such as a hand saw or manual pruners. 2) Avoid soil compaction by prohibiting the use of heavy equipment such as backhoes and bobcats under the tree drip line. 3) Do not store or park tools, equipment, vehicles, or chemicals under the tree drip line. 4) Avoid washing of equipment and tools such as wheel barrels, shovels, and mechanical motors under the tree drip line. 5) Prevent flooding and pooling of service water under the drip line. Grade changes that will flood the TPZ are prohibited unless a drainage plan is implemented. No grade changes within the TPZ shall be allowed. 6) Avoid cutting tree roots whenever possible. This can sometimes be accomplished by bridging roots, tunneling, or radial trenching. If roots must be cut use a sharp tool that will make a clean flush cut and not tear the roots. If possible all digging under the tree drip line should be done manually to avoid tearing out of roots. Roots outside of the TPZ may be cleanly severed vertically with a sharp garden tool. 7) Do not raise or lower the grade within the tree protection zone of any protected trees unless approved by the project arborist. If any work is required within the TPZ the Arborist shall be consulted previous to beginning. The Arborist shall be contacted as soon as possible to arrange for a timely inspection and prevent delays. 8) Place a protective barrier or temporary fencing around as much of the drip line of the tree trunk as possible while allowing for the proposed work to be done. Protection fencing shall be 6 ft. high chain link freestanding panels or secured to posts driven into the ground. There shall be no entry gates into the protected zones. The protection fencing shall be in place before demolition begins and shall only be removed or reduced when all heavy equipment such as back-hoes, bobcats, loaders, and other heavy equipment with tires and tracks will not be required. Fencing can be adjusted or sections reduced or removed as the project advances into the landscaping phases of the project. The consulting arborist shall be contacted if there are doubts about the placement or removal of fencing. 9) Construction personnel should be briefed on the importance of the guidelines before construction begins and reminded of it during tailgate meetings and as necessary. A printed copy should be posted where employees can be reminded of it. Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 16 Tree Protection Fencing Plan (cropped) Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 17 Tree # 1 “Mondell pine” a) Structural excavation and over-excavation: This tree will not be impacted by any structural excavations because none are proposed within the drip line of the tree. b) New walls, walkways or alternatives: No new walls or walkways are proposed within the drip line of this tree. c) New Landscaping: Tilling and soil preparation within 8 ft. of this tree shall be done manually with care to preserve the roots. d) New Sprinklers: No broadcast trenching shall be allowed within 8 ft. of all sides of the tree trunk. Alternatives can sometimes be accomplished by radial trenching, Tunneling under roots, and above ground drip systems. e) Canopy pruning: No pruning will be required to complete the proposed construction project. f) Root pruning: any roots beyond 8 ft. of the tree trunk can be severed with a clean vertical cut with a sharp tool such as hand pruners, loppers, handsaws, power sawzall. g) Maintenance: During the hot summer months the tree shall be watered as needed until the sprinkler system is installed and working. h) Encroachment impacts: This project is expected to have a minimal impact on the short or long term health of this tree and it is expected to survive in its existing condition if the protection recommendations are followed and adhered to. Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 18 Tree # 2 “Olive” a) Structural excavation and over-excavation: This tree will not be impacted by any structural excavations because none are proposed anywhere near the tree or within its drip line. b) New walls, walkways, driveway or alternatives: No new walls or walkways are proposed within the drip line of this tree. c) New Landscaping: Tilling and soil preparation within 12 ft. of this tree shall be done manually with care to preserve the roots. d) New Sprinklers: No broadcast trenching shall be allowed within 12 ft. of all sides of the tree trunk. Alternatives can sometimes be accomplished by radial trenching, Tunneling under roots, and above ground drip systems. e) Canopy pruning: No pruning will be required to complete the proposed construction project. f) Root pruning: any roots beyond 12 ft. of the tree trunk can be severed with a clean vertical cut with a sharp tool such as hand pruners, loppers, handsaws, power sawzall. g) Maintenance: During the hot summer months the tree shall be watered as needed until the sprinkler system is installed and working. h) Encroachment impacts: This project is expected to have a minimal impact on the short or long term health of this tree and it is expected to survive in good health if the protection recommendations are followed and adhered to. Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 19 Tree # 3 “London plane” a) Structural excavation and over-excavation: This tree will be minimally impacted by the structural excavations for the northwest corner of the proposed new home. b) New walls, walkways, driveway or alternatives: The impact of the proposed new concrete walkway south of the tree trunk is expected have minimal impact to the tree due to the distance and because it is proposed on the footprint of the existing home. c) New Landscaping: Tilling and soil preparation within 8 ft. of this tree shall be done manually with care to preserve the roots. d) New Sprinklers: No broadcast trenching shall be allowed within 8 ft. of all sides of the tree trunk. Alternatives can sometimes be accomplished by radial trenching, Tunneling under roots, and above ground drip systems. e) Canopy pruning: Removal of dead branches is recommended for this tree. f) Root pruning: No roots are expected to be impacted by this proposed construction project. g) Maintenance: During the hot summer months the tree shall be watered as needed until the sprinkler system is installed and working. h) Encroachment impacts: This project is expected to have a minimal impact on the short or long term health of this tree and it is expected to survive in good health if the protection recommendations are followed and adhered to. Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 20 Tree # 4 “Olive” a. Structural excavation and over-excavation: This tree is expected to be minimally impacted by the structural footings of the northernmost edge of the proposed home. The proposed new home is set further away from the tree than the existing home and it is unlikely that major roots exist beyond the footing of the existing home. b. New walls, walkways, or alternatives: This tree will not be impacted by proposed walkways, or walls. c. Concrete driveway: The proposed new driveway is expected to have minimal to moderate impact to this Olive tree because the driveway will be slightly closer to the tree than the existing driveway. It is important to cleanly severe the roots with a sharp tool to prevent tearing and pulling of roots at the proposed distance. d. New Landscaping: Tilling and soil preparation within 10 ft. of this tree shall be done manually with care to preserve the roots. e. New Sprinklers: No broadcast trenching shall be allowed within 10 ft. of all sides of the tree trunk. Alternatives can sometimes be accomplished by radial trenching, Tunneling under roots, and above ground drip systems. f. Canopy pruning: Light raising of the canopy may be required for clearance of the second floor. g. Root pruning: Roots for the driveway and house footings greater than one inch in diameter shall be cleanly severed with a sharp tool such as hand pruners, loppers, hand saws, or power saws. h. Maintenance: During the hot summer months the tree shall be watered as needed until the sprinkler system is installed and working. i. Encroachment impacts: This project is expected to have a minimal to moderate impact on the short or long term health of this tree and it is expected to survive in good health if the protection recommendations are followed and adhered to. Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 21 Trees # 6 & 7 “Pine & Brush cherry” a) Structural excavation and over-excavation: These trees are expected be minimally impacted by the structural footings of the southeast edge of the proposed home due to their distance to the tree trunk. b) New walls, walkways, or alternatives: These trees will not be impacted by proposed walkways, or walls. c) Concrete driveway: These trees will not be impacted by the proposed new driveway. d) New Landscaping: Tilling and soil preparation within 8 ft. of these trees shall be done manually with care to preserve the roots. e) New Sprinklers: No broadcast trenching shall be allowed within 10 ft. of all sides of the trunk of these trees. Alternatives can sometimes be accomplished by radial trenching, Tunneling under roots, and above ground drip systems. f) Canopy pruning: No pruning will be required for this proposed project. g) Root pruning: Roots for the southeast corner of the house footings greater than one inch in diameter shall be cleanly severed with a sharp tool such as hand pruners, loppers, hand saws, or power saws. h) Maintenance: During the hot summer months these trees shall be watered as needed until the sprinkler system is installed and working. i) Encroachment impacts: This project is expected to have a minimal to moderate impact on the short or long term health of these trees and they are expected to survive in good health if the protection recommendations are followed and adhered to. Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 22 Certificate of Performance & Arborists Disclosure Statement I Javier Cabral certify the following:  No warranty is made, expressed or implied, that problems or deficiencies of the trees or the property will not occur in the future, from any cause. The Arborist shall not be responsible for damages or injuries caused by any tree defects, and assume no responsibility for the correction of defects or tree related problems. The Arborist assumes no responsibility for damage to trees as a result of the construction activities as the Arborist cannot be present at all times to witness all construction tasks near the subject trees.  The owner and client of the trees may choose to accept or disregard the recommendations of the Arborist or seek additional advice if the owner decides not to accept the Arborists findings or recommendations.  The Arborist has no past, present or future interest in the removal or preservation of any tree. The opinions contained in the Arborist report are independent and objective judgements of the Arborist.  The findings, opinions, and recommendations of the Arborist are based on based on the physical inspection of said property. The opinions are based on knowledge, experience, and education.  The Arborist shall not be required to provide testimony, provide site monitoring, provide further documentation for changes beyond the control of the Arborist, be deposed, or to attend any meeting without contractual arrangements for additional fees to the Arborist.  The Arborist assumes no responsibility for verification of ownership or location of property lines, or for an y recommendations based on inaccurate information.  This Arborist report may not be reproduced without the expressed written permission of the Arborist and the client to whom the report was provided to. Any changes or alteration of this report invalidates the entire report.  Arborists are tree specialists who use their education, knowledge, training and experience to examine trees, recommend measures to enhance the beauty and health of trees, make recommendations to prevent or minimize damage to trees during and after construction projects, and attempt to reduce the risk of living near trees. Clients may choose to accept or disregard the recommendations of the arborist, or to seek additional advice.  Arborists cannot detect every condition that could possibly lead to the structural failure of a tree. Trees are living organisms that fail in ways we do not fully understand. Conditions are often hidden within trees and below ground. Arborists cannot guarantee that a tree will be healthy or safe under al l circumstances, or for a specified period of time. Likewise, remedial treatments, like any medicine, cannot be guaranteed.  Treatment, pruning and removal of trees may involve considerations beyond the scope of the arborist’s services such as property boundaries, property ownership, site lines, disputes between neighbors, and other issues. Arborists cannot take such considerations into account unless complete and accurate information is disclosed to the arborist. An arborist should then be expected to r easonably rely upon the completeness and accuracy of the information provided.  Trees can be managed, but they cannot be controlled. To live near trees is to accept some degree of risk. The only way to eliminate all risk associated with trees is to eliminate all trees. Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 23 Phillip Chan 76 W Wistaria Ave Arcadia, CA 91007 April 22, 2019 Javier Cabral / Consulting Arborist Pg. # 24