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or destroy the trees natural integrity and shape, or failure to detect and prevent treatable diseases and insect infestations as determined by the City of Santa Ana. Replacement shall be made by the Contractor in the kind and size of trees determined by the City of Santa Ana. Where there is a difference in value between the trees lost and the replacement of trees, this difference will be deducted from the contract payment. In all cases, the value of the trees lost will be determined by the City of Santa Ana using the latest American Shade Tree Conference guidelines for value determination. 1.4. SHRUB CARE Contractor shall remove dead shrubs and backfill to existing grade with imported soil as necessary to maintain a consistent finished grade. Sinkholes will not be acceptable as it represents a liability to the City. Replacements of shrubs will be approved by City of Santa Ana. Wall vines adjacent to and coming from City landscapes are a part of the maintenance of this contract. Wall vines shall be kept trimmed approximately four (4) inches from the wall and eight (8) inches below the top of the wall. Where wall vines have been allowed to grow over the top of the wall, the Contractor shall keep wall vines trimmed down to the top of the wall. Wall vines may require trimming two or more times per month during the growing season. 1.4.1 PRUNING All shrubs growing in the work areas shall be pruned as required, to maintain plants in a healthy growing condition and to maintain plant growth within reasonable bounds to prevent encroachment of passage ways, walks, streets, view of signs or in any manner deemed objectionable by the City of Santa Ana. Dead or damaged limbs or branches shall be cleaned out and removed with sharp pruning tools with no projections or stubs remaining. Pruning shall be done in a manner to permit plants to grow naturally in accordance with their normal growth characteristics except box hedging may be required on some shrubs, as designated by the City of Santa Ana. Shear hedging or severe pruning of plants, unless authorized by the City of Santa Ana, shall not be permitted. Should the Contractor shear hedges or severely prune plants and disfigure or damage the plants, the contractor shall be responsible for replacing those plants with like kind and size as determined by the City of Santa Ana. The Contractor may be requested from time to time to raise the bottom or lower the tops of the shrubs for security reasons. This shall be considered routine maintenance and performed at no extra cost to the City. 1.4.2 FERTILIZATION All shrubs shall be fertilized using a complete fertilizer (such as 16-6-8) four (4) times per year. The rate of application shall be two (2) pounds of actual nitrogen per 1,000 square feet. Proof of application in the form of empty fertilizer bags may be requested at any time by the City of Santa Ana. Advanced notice shall be given the City of Santa Ana prior to performing this task. 1.4.3 RENOVATION Shrubs shall be thinned and pruned, separated and/or relocated for the health of the planting and the appearance of the site, and at such othertimes when directed by the City. Infill planting of bare shrub areas shall be replanted when necessary or upon request with plant material of the same species one time per year as part of routine maintenance at no additional cost to the City. Clry of Santa Ana - RFP 19-048 Landscape Maintenance Services of Water Faellities and Santa Ana Regional Transportatlon Center 20