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overgrowth into passageways, walks, streets, view of signs or in any manner deemed objectionable by the Director's Representative. Dead or damaged limbs shall be removed so that no projections or stubs remain. Pruning/trimming shall be done by hand pruners, shears or loppers in a matmer to permit plants to grow naturally in accordance with their normal growth characteristics. "Box hedging" may be required on some shrubs, as designated by the Director's Representative. "Box hedged" plants will be required to have all five sides level and straight to the satisfaction of the Director's Representative. In order to achieve straight and level lines of shrubs the Contractor shall run string lines to assure straight pruning. Shear hedging or severe pruning/trinvning of plants, unless authorized by the Director's Representative, is not permitted. Topping of plants whose natural growth stems from the base of the plant is not permitted. Should the Contractor top, shear hedge or severely prune plants and disfigure or damage the plants, the Contractor shall be responsible for replacing those plants with like kind and size, subject to approval by the Director's Representative, The Contractor may be requested from time to time to raise the bottom of the shrubs for security reasons. 2.2.2 Mulching of Bare Areas 2.2.2.1 In all shrub areas where bare soil is visible the Contractor shall apply US Composting Council STA tested and approved compost mulch 3"- 4" minus by 2" thick minimum twice per year (third week of January and July) and as necessary to maintain uniform and complete coverage. Leaf litter and other organic materials other than mulch shall be removed on a continuous basis. 2.2.2.2 All bare soil areas shall be cultivated to 6" deep on a weekly basis while awaiting fresh mulch. 2.3 Vine Care and Services 2.3.1 Maintenance 2.3.1.1 Contractor shall trim the vine continuously and once it reaches the top of the wall or at a specific height on the wall, as determined by the Director's Representative, the Contractor shall not allow the vine to encroach above the designated height. The Contractor shall also prune the vine back to the wall to reduce the width and weight of the vine. The Contractor shall keep vines off telephone poles, plant material or other non -wall surfaces at all times. 2.3.2 Planting 2.3.2.1 The Contractor shall plant each year as a part of the base agreement (at Wier expense) 200-1gallon Parthenocissus tricuspidata (Boston Ivy) vines at 15' on center, The Contractor shall coordinate with Irrigation Consultant to assure the new vines receive adequate irrigation. The Contractor will bring to the Director's Representative immediately when any vine is City of Santa Ana RFP 19-092 Page 18