20 ATTACHMENT 3 - Laserfiche WebLink

Updated Arborist Report Sarvana Chilla, 3987 Stanl HortScience I Bartlett Consulting Page 9 8. When demolition adjacent to trees is completed, install Tree Protection fencing a minimum of 5' from the trunk of each tree. Fences shall be 6 ft. chain link or equivalent as approved by the City. Fences are to remain until all grading and construction in the area is completed Specific Tree Protection Zones Tree No. TPZ 10 5'NandS 5' E of fence line to W fence line 16 5'NandS 5 ' W of fence line to E fence line 18 10' to the W, N and S Tree Protection during Construction 1. Tree protection fences are to remain until all site work has been completed within the work area. Fences or other protection devices may not be relocated or removed without permission of the Project Arborist. 2. Any approved grading, construction, demolition or other work within the TREE PROTECTION ZONE should be monitored by the Project Arborist. 3. All contractors shall conduct operations in a manner that will prevent damage to trees to be preserved. 4. Utilities may be installed by boring at least 4' below grade within the TREE PROTECTION ZONE of any Heritage tree to avoid excessive root injury. 5. Hydrated lime to stabilize plastic soils shall not be incorporated into soil within the TREE PROTECTION ZONE. Lime is toxic to plant roots. Subsoil stabilization treatments must be discussed with the Project Arborist and designed to protect tree roots. 6. Irrigation systems must be designed so that no trenching that severs roots larger than 1" diameter will OCCUr within the TREE PROTECTION ZONE. 7. Construction trailers, traffic and storage areas must remain outside TREE PROTECTION ZONE at all times. 8. Any root pruning required for construction purposes shall receive the prior approval of and be supervised by the Project Arborist. Roots should be cut with a saw to provide a flat and smooth cut. Removal of roots larger than 2" in diameter should be avoided. If roots 2" and greater in diameter are encountered and during site work must be cut to complete the construction, the Project Arborist must be consulted to evaluate effects on the health and stability of the tree and recommend treatment. 9. If injury should occur to any tree during construction, it should be evaluated as soon as possible by the Project Arborist so that appropriate treatments can be applied. 10. No excess soil, chemicals, debris, equipment or other materials shall be dumped or stored Wlthln the TREE PROTECTION ZONE. 11. Any additional tree pruning needed for clearance during construction must be performed by a Certified Arborist and not by construction personnel. 12. Trees that accumulate a sufficient quantity of dust on their leaves, limbs and trunk as judged by the Project Arborist shall be spray -washed at the direction of the Project Arborist. 13. All trees shall be irrigated on a schedule to be determined by the Project Arborist (every 3 to 6 weeks during the warm season is typical). Each irrigation shall wet the soil within the TREE PROTECTION ZONE t0 a depth Of 3O".