25E - WEST COAST ARBORIST - Laserfiche WebLink

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PRUNE CLASSIFICATIONS Grid Prune- Grid tree pruning is based an pruning in pre -designed districts, or grids on a set cycle and includes all trees (small, medium and large -sized.) Pruning will include structural pruning, crown raising, and crown cleaning in accordance with the standards set forth by the International Society of Arboriculture Pruning Standards (Best Management Practices) and shall have no more thar 25% of the live foliage removed at a given time. Full Prune/Crown Reduction- Crown reduction is performed when conditions within the crown of a hardwood tree are such that the entire tree needs to be reduced. A full prune is recommended when the primary objective is to maintain or improve tree health and structure, and includes pruning to reduce overall canopy mass and excessive wood weight. Trees that are identified for a full prune shall have more than 25% of the live foliage removed at a given time. Service Requests A Service Request Prune includes tree maintenance services an designated trees) Murdered by the Agency Arborist or designee. Pruning may include structural pruning, crown raising, crown cleaning or pruning to reduce/restore the crown. Whichever work type is ordered by the Agency, pruning will be performed in accordance with the standards set forth by the International Society of Arboriculture Pruning Standards and the Best Management Practice, Tree Pruning Guidelines. Work assignments from the Agency may require mebilization from one tree site to another within the Agency. Line Clearance Trees that interfere or have the passibility of interfering with utility lines will be trimmed in a manner to achieve the required clearances as specified and in accordance with the California Public Utilities Commission. It is our goal to protect the current health and condition of the tree and to maintain its symmetry and direct growth away from the utility lines. Small Tree Care Proper pruning and care during the early stages of the tree's life will save money in the future, and create a safer, more beautiful, healthy, easy-ta-maintain tree. We believe that tree care that is performed early will affect its shape, strength and life span. Uur specialized small tree care team consists of certified personnel trained to perform the following: • Selective structural pruning • Removal of dead, interfering, split and/or broken limbs • Pre -conditioning the water retention basin built around the tree • Staking or re -staking • Adjusting tree ties • Adjusting trunk protectors • Weed abatement Palm Trunk Skinning, Palm tree skinning consists of the removal of dead frond bases (only), at the point they make contact with tf a trunk without damage to the live trunk tissue. Root Pruning We strongly recommend against any root pruning, however, should the Agency elect to proceed, we recommend that it be done no closer than 3 times the diameter of the trunk. Roots will be pruned to a depth of approximately 12 inches by cleanly slicing through the roots, so as not to tear or vibrate the root causing damage to the tree. The excavated area will be backfilled with native sail and debris will be hauled away. Tree Removal Operations With a minimum of 48 hours advanced notice, WCA will inform Underground Service Alert (USA) of the location of work for the purpose of identifying any and all utility lines. The removal process consists of lowering limbs delicately onto the ground to prevent any hardscape damage. Immediately following the removal, the stump will he ground down, if ordered to do so and with proper USA notification. Tree Planting We can replace trees that have been removed and plant new trees in accordance with specifications. We are prepared financia,ly and logistically to acquire and purchase selected tree species for tree planting. At a minimum of 48 hours in advance we will inform Underground Service Alert (USA) of the location of work for the purpose of identifying any and all utility lines. A well -trained planting team will perform the soil preperatian and installation of the tree. Tree Watering Tree watering wi I be performed by a full-time, WCA team member on various routes, when requested by the Agency. This tuam will also be responsible for reporting special care needs to the small tree care team. This could include reporting weeds, soil that has settled, and/or staking and tying needs. 25E-44 Page 201