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3. Live, healthy fronds, initiating at an angle of 90 degrees or greater from the <br />horizontal plane, shall not be removed. Fronds removed should be cut close to the <br />petiole base, taking into consideration the role of petiole bases in the formation <br />and maintenance of the ornamental ball at the base of the canopy, as applicable <br />by species. <br />4. Fronds shall be trimmed using a handsaw, pole saw, or chainsaw that has been <br />sterilized for no less than five (5) minutes by having the entirety of its cutting blade <br />submersed in a twenty -five (25) percent chlorine bleach solution or one hundred <br />(100) percent Lysol, before and after the tool is used to cut the fronds of any other <br />palm tree. <br />5. Using properly sterilized equipment as described herein, any fruit or flower <br />structures in the crown of the palm shall be removed concurrently with frond <br />pruning. <br />6. The Contractor shall use care not to cut into live trunk tissue while maintaining the <br />ornamental ball. The Contractor shall remove any foreign plant material that has <br />sprouted in an ornamental ball. The Contractor shall verify that the ornamental ball <br />meets the standard described herein each time a Canary Island Date Palm is <br />pruned. <br />(3) The specifications for the pruning of Date Palm trees are as follows: <br />1. Maintenance of the ornamental ball located at the base of the palm canopy, <br />directly below the live fronds, shall be as described by species as follows: <br />2. Date Palm (Phoenix dactylifera): spent petiole bases are left to form a supportive <br />"base" below the lowest green fronds of the crown. Unlike the ornamental ball of <br />a Canary Island Date Palm (Phoenix canariensis), the base does not require <br />ornate shaping. Instead, spent petiole bases are left uniformly long to form the <br />base of the canopy, which shall extend no less than four (4) and no more than six <br />(6) feet below the lowest live frond in the crown. The Contractor may use a <br />chainsaw in forming and /or shaping the base of a Date Palm by shortening a <br />number of the lower petiole bases to bring the length of the nut to standard. The <br />Contractor shall use care not to cut into live trunk tissue while maintaining the <br />nut. The Contractor shall verify that the base meets the standard described <br />herein each time a Date Palm is pruned. <br />(4) The specifications for the pruning of King Palm trees are as follows: <br />Maintenance of the ornamental ball located at the base of the palm canopy, <br />directly below the live fronds, shall be as described by species as follows: <br />2. King Palm (Archontophoenix cunning hamiana): loose petiole bases are to be <br />removed each time the crown of a King Palm is serviced. Petiole bases that are <br />attached to live trunk tissue shall be left undamaged. <br />(5) The specifications for the pruning of Mexican Fan Palm trees are as follows: <br />1. Maintenance of the ornamental ball located at the base of the palm canopy, <br />directly below the live fronds, shall be as described by species as follows: <br />Mexican Fan Palm (Washingtonia robusta): spent petiole bases are left uniformly <br />long to form a base which shall extend no more than four (4) feet below the <br />City of Santa Ana Street Tree Maintenance RFP <br />19E -33 Page 30 <br />