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length of the palm trunk. Canary Island date palms shall be pruned using a sterilized handsaw. The handsaw must be cleaned and sterilized before and after pruning each tree. e. All volunteer palm seedlings must be removed that are growing within the streets, parkways, or setback dedicated areas. 1.09 UNACCEPTABLE PRUNING The following procedures, or others that will result in tree decline, are not allowed (storm damage and other extenuating circumstances exempted): a. Severe cutting back of all growing tips usually referred to as topping, pollarding, or hat racking. b. Flush cutting where a cut is made even with the surface of the trunk or limb, removing the branch collar and branch bark ridge. c. Stub cutting where branch removal results in the base of branch removed protruding more than approximately one fourth (1/4) inch beyond the zone of branch collar and branch bark ridge. d. Removal of a healthy main leader, for reasons other than power line clearance. e. Excessive cutting or lifting that exceeds the International Society of Arboriculture or SAPRF standards. 1.10 DAMAGE TO PUBLIC OR PRIVATE PROPERTY Should any structure or property be damaged during the tree pruning operations, the persons conducting the work shall immediately notify the proper owners and an authorized SAPRF representative. Repairs to property damaged by the responsible party shall be made within forty -eight (48) hours, except utility lines, which shall be repaired the same working day. Repairs on private property shall be made in accordance with the appropriate building code under permits issued by the City of Santa Ana. Any damage caused by the Contractors employees shall be repaired or restored by them at their expense to a condition similar or equal to that existing before such damage or injury, or they shall repair such damage in a manner acceptable to the City of Santa Ana and /or SAPRF. Special attention is drawn to sprinkler systems in City landscapes and the need to avoid damage. All damage to irrigation systems shall be repaired as soon as possible at Contractors expense. 1.11 WORK PERFORMED ON PRIVATE PROPERTY No SAPRF contracted tree worker shall perform work upon private property without the written consent of the property owner and an authorized SAPRF representative. 1.12 PUBLIC SAFETY AND COOPERATION All tree work shall be conducted in a manner as to cause the least possible interference with, or annoyance to others. Pedestrian and vehicular traffic shall be allowed to pass through the work areas only under conditions of safety and with as little inconvenience and delay as possible. Unless the work area is totally barricaded or otherwise kept safe, at least one worker shall serve to coordinate safe operations on the ground at all times when work operations are in progress. 46 25H -58