19E - RFP - STREET TREE MAINTENANCE

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bottoms left on. All container debris (e.g. strapping, box fragments, and nails) shall be removed from the planting pit prior to backfilling. The Contractor shall install the tree or palm so that the top of root ball is at grade with top of curb so that the trunk flare is completely exposed. In the event that there is no curb (i.e. park site), the Contractor shall install the tree or palm so that the top of root ball is two (2) inches above surrounding finish grade. The Contractor shall not resort to cutting or trimming the root ball as a means of meeting grade standards. 10. The Contractor shall backfill hardwood tree plantings with excavated native soil. 11. The Contractor shall backfill transplanted palm plantings with one hundred (100) percent washed mortar (plaster) sand. 12. While backfilling, the Contractor shall cease backfilling when the planting pit is one half (1/2) full and apply water to remove air pockets from the backfill. Once the water has drained, the Contractor shall resume backfilling the planting pit. A watering basin shall be constructed in a uniform circle and shall extend from the center of the tree trunk to six (6) inches beyond the edge of the root ball. The top of the watering basin shall be graded and maintained uniformly with the upper edge of the basin maintained at a grade of four (4) inches above the root flare of the tree. 13. The Contractor shall be responsible for the stability of planted trees. The nursery stake stall be removed from the trunk of the tree (as applicable) and the tree shall be double staked using two (2), two (2) inch lodge pole stakes of a length sufficient to be installed beyond the depth of the planting stock root ball and to extend to the upper branches of the installed tree's crown. The stakes shall be installed an equal distance from the trunk of the tree and shall be installed perpendicular to the street or sidewalk and shall be installed so that one stake is orientated to be one hundred eighty (180) degrees opposite the other. The root ball shall not be damaged by the installation of stakes. The trunk of the tree shall be attached to the stakes using City approved tree ties installed as per manufacturer's specifications. (2) New Tree Care New Tree Care consists of the irrigation of young trees which have been installed by the Contractor and the cultivation of new canopy coverage. The Contractor shall comply with all general specifications standards described herein. 2. As stated previously herein, the Contractor shall identify the location of all utilities and private property landscape irrigation components prior to the planting of any tree. The Contractor shall take all responsibility for any damage that occurs during the planting of any tree. 3. The Contractor shall not use hoses, equipment or water from private properties when watering parkway trees. City of Santa Ana Street Tree Maintenance RFP 19E -37 Page 34