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Sam Oakley <br />231 Old Bernal Avenue Tree Inventory, Valuation, and Construction Guidelines <br />9/13/2024 5 <br /> <br /> <br />PO BOX 2412 <br />PISMO BEACH, CA 93448 <br /> <br /> (415) 407-6995 <br />SAM@OAKLEYGROUP.ORG <br />WWW.OAKLEYGROUP.ORG <br /> <br />• proximity of cuts to the trunk: cuts close to the trunk have a bigger impact <br />• species: some species tolerate it better than others <br />• tree age: old trees are more likely to stress and die <br />• tree condition: trees in poor health should not be root pruned <br />• tree lean: leaning trees should not be root pruned <br />• soil type and site drainage: shallow soils mean stay farther from the trunk <br />Adhering to the following recommended procedures should result in success for the trees <br />in this project: <br /> <br />Project Site Trees <br /> <br />Exploratory excavation of the trench area anywhere near the dripline of a tree using an Air- <br />Spade is recommended. Once roots are exposed by this method, they may be evaluated by <br />an arborist. By observing the exposed roots, an action plan can be prepared, which may <br />involve the severing of some roots and while maintaining others. <br /> <br />If the recommended construction guidelines and post construction monitoring and care are <br />followed, the trees should successfully survive. <br /> <br />Only trees that have a moderate to elevated likelihood of impact are considered in this <br />section: <br /> <br />Trees to be preserved – Root loss may result in flagging and desiccated foliage. No <br />structural instability anticipated. <br />- Root pruning is to occur no closer to any trunk than three (3) times the <br />diameter, due to potential for substantial root loss and instability if roots are <br />pruned any closer. <br />- Crown clean and clearance prune construction-side of canopy prior to <br />construction activities; <br />- Prune roots by hand; <br />- Mulch under dripline to a depth of six (6) inches minimum and maintain <br />mulch throughout construction activities; <br />- Single application of slow-release fertilizer and plant growth regulator prior to <br />construction activities; <br />- Irrigate monthly during construction activities with a final irrigation at the <br />completion of the project; <br />- Monitor and Inspect Monthly during construction activities with a final <br />assessment at the completion of the project. <br /> <br />The following guidelines must also be followed: <br /> <br />Page 339 of 373