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6.1 B Page 14 Condition. In general, the condition of each tree will be recorded in one of the following categories adapted from the rating system established by the International Society of Arboriculture: Excellent 100% Very Good 90% Crood 80% Fair 60% Poor 40% Critical 20% Dead 0% Maiatenance need. The following maintenance categories will be collected: 1. Prioritv 1 Removal. Trees designated for removal have defects that cannot be cost- effectively or practically treated. T'he majority of the trees in this category has a large percentage of dead crown and pose an elevated level of risk for failure. Any hazards that could be seen as potential dangers to persons or property and seen as potential liabilities to the client would be in this category. Large dead and dying trees that are high liability risks are included in this category. These trees are the first ones that should be removed. 2. Prioritv 2 Removal. Trees that should be removed but do not pose a liahility as great as the first priority will be identified here. This category would need attention as soon as "Priority One" trees are removed. 3. Priority 3 Removal. Trees that should be removed, but that pose minimal liability to persons or property, will be identified in this category. 4. Prioritv 1 Prune. Trees that require priority one pruning are recommended for trimming to remove hazardous deadwood, hangers, or broken branches. These trees have broken or hanging limbs, hazardous deadwood, and dead, dying, or diseased limbs or leaders greater than four inches in diameter. 5. Priority 2 Prune. T'hese trees have dead, dying, diseased, or weakened branches between two and four inches ia diameter and are potential safety hazards. 6. Laree Tree Routine Prune. These trees require routine horticultural pruning to correct structural problems or growth patterns which would eventua!!y obstruct traffic or interfere with utility wires or buildings. Trees in this category are large enough to require bucket truck access or manual c(imbing. 7. Small Tree Routine Prune. T'hese trees require routine horticultural pruning to correct structural problems or growth patterns which would eventually obstruct trafftc or interfere with utility wires or buildings. These trees are small growing, mature trees tlaat can be evaluated and pruned from the ground. 8. Tra.inin Prune. Young, large-growing trees that are still small must be pruned to correct or eliminate weak, interfering, or objectionable branches in order to minimize future maintenance requirements. These trees, up to 20 feet in height, can be worked with a pole pruner by a person standing on the ground. 9. Stump Removal. This category indicates a stump that should be removed. ' Prepared for Ury of Redwood City, Califomia ��, Prepared by Davey Resource Group I II