AgdaPkt 2020-06-22 Joint SA PFA - Laserfiche WebLink

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6.1. - Page 22 of 52 B. Work Quality All tree pruning shall comply with good arboreal practice for the particular species of trees being trimmed and shall be consistent with the Pruning Standards and Best Management Practices as adopted by the International Society of Arboriculture. The Contractor shall also meet the requirements of the American National Standards, Z133, entitled "Safety Requirements for Arboricultural Operations," published by the American National Standard Institute, Inc., 1430 Broadway, New York, New York 10018. The City's Tree Maintenance Leader and/or other authorized City staff shall determine if the Contractor has met all pruning requirements, and payment shall not be made for pruning that is not in accordance with the above standards. The Contractor shall be deemed in contract default if they consistently fail to comply with the aforementioned standards. C. Standards Prior to beginning the work, the Contractor shall review with the City's Tree Maintenance Leader and/or other authorized City staff various methods, tools, and work scheduling to be used on the project. Unless otherwise indicated, tree pruning shall include, but not be limited to, accepted pruning activities. Daily tree pruning operations shall commence no earlier than 7:00 AM and shall be completed each day no later than 4:00 PM. The City expects that the Contractor will work on a daily basis to perform tree work, generally on a block by block basis. Not less than once per week, Contractor shall submit to City a list of locations and work performed during the previous work week via electronic transmission on a form to be provided by City. Limbs two inch (2") in diameter or greater shall be precut to prevent splitting. When there is a chance of bark tearing at the crotch, remove large limbs with three cuts. Make the first cut on the underside of the branch one foot (1') to two feet (2') from the crotch. The undercut should be at least one third (%) of the diameter. Make the second cut one -inch (1") to three inches (3") further from the crotch than the first. The final cut is made at the crotch in a manner to favor the earliest possible covering of the wound by callus growth. Cuts shall not be made so large that they will prevent sap flow. All cut branches three and one half inches (3%") or larger in diameter shall be lowered by proper ropes to the ground. Any damage caused by dropping limbs shall be repaired within three (3) days at the Contractor's expense and to the satisfaction of the City's Tree Maintenance Leader and/or other authorized City staff. All debris resulting from tree pruning operations shall be removed from the work site on a daily basis. Firewood - sized wood shall be stacked neatly and safely on-site for use by Redwood City residents. All state or county quarantine regulations shall be followed for wood disposal as required. Permission may be given to the Contractor, at the City's discretion, to dispose of clean woodchips at a City facility at no additional cost to the City. PUBLIC WORKS SERVICES DEPARTMENT FY 2019-20 RFP FOR COMPREHENSIVE STREET TREE MAINTENANCE SERVICES 8 OF 37 233