WEST COAST ARBORIST, INC. (#2025616)

Trees that are inaccessible due to location or slope with an aerial truck shall be climbed using the appropriate ropes and saddle/harness to carry out the necessary pruning. The appropriate rigging shall be used as needed to safely lower branches. Trees being pruned shall not be climbed using climbing spurs. Pruning Objectives: Trees shall be pruned with a clearly defined objective to accomplish one or more of the following categories as defined in the publication ISA Pruning Best Management Practices Third Edition (or current edition): • Improve Structure • Risk Mitigation • Provide Clearance • Maintain Health • Reduce Density • Restoration • Size Management Pruning Requirements: Trees shall be pruned using the natural pruning system to retain and promote the characteristic form of the species or cultivar in its current location. • Prune to remove dead wood, hazardous branches, weak, diseased, insect- infested, broken, low, or crossing limbs, and all suckers, shoots, and ivy. Branches with an extremely narrow angle of attachment shall be removed. Any structural weakness, decayed trunk, or branches shall be reported to the Parks Division Manager. • The Contractor shall provide for proper vehicle clearance at the curb - both in the height of lower branches and extension of branches into the street. Height clearance at the curb shall be a minimum of fourteen (14) feet from the edge of the pavement. • If there are sidewalks, paths, or trails, tree branches must be pruned a minimum eight (8) feet above the sidewalk, path, or trail • When trees impact sight distances for roadway traffic, prune trees to provide for adequate visual distance at intersections, clearance of traffic control signs and devices as well as street name signs at intersections • On trees known to be diseased, pruning tools shall be disinfected with a ten percent (10%) chlorine bleach solution or disinfectant after each cut and between trees where there is danger of transmitting the disease on tools • Trees with dense foliage surrounding streetlights shall be opened to allow light to penetrate through the tree • All cut branches shall be safely lowered to the ground. Any damage caused by dropped limbs shall be repaired promptly at the Contractor's expense and to the satisfaction of the Parks Division Manager • Pruning around high-voltage transmission lines shall be done by a certified and qualified line clearance tree trimmer only (ANSI Z133-2017 Section 4) • All existing mistletoe in trees to be pruned shall be removed unless otherwise directed by the Parks Division Manager • Tree foliage shall not be reduced by more than 25% for mature trees unless otherwise directed by the Parks Division Manager Docusign Envelope ID: CFBCA4B2-32D3-4B9F-8862-2F2E71D4F416