Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 10: Roads, Landscaping and Fences  15 of 15 Top Soil Dressing  Supply of Plants  Planting of Trees and Shrubs  Irrigation  Maintenance  Replacement  10_Vol3_d4.3_Section 10 roads, landscaping and fences_en_GIR_rev6.docx  Top soil ready to receive planting shall be given a dressing of manure at a rate of 5 kg/m². All trees, shrubs, grasses and other plants shall be supplied by the Contractor based on the Landscape  design to be prepared by the Contractor and approved by Engineer.  Prior to planting holes for trees and shrubs shall be prepared and filled twice with water. Plants shall  be watered in their containers so that the soil and the roots are kept in a moist condition. Plants shall  then be removed from their containers and their root ball complete with soil set in place and the holes  backfilled and the plants firmly trodden in. Soil shall not be allowed to rise above the original container level and the ground level around the trunk or stem shall be set below adjacent ground to  retain irrigation water. All species of tree and shrubs where required shall be provided with supports  during planting. These shall take the form of timber stakes of adequate strength driven into the ground  adjacent to the trunk or stem without damage to roots. Wide hessian strips shall be used to tie the plant  securely but no tightly to the support. Where shrubs are to be planted in groups to provide ground cover, individual plants shall be spaced as follows:  After planting of native tree and shrub species they shall only be irrigated twice and thereafter only as  required. Non-indigenous species shall be irrigated regularly until handover to the Employer. Grassed  areas shall be irrigated immediately after planting and regularly thereafter until handover. Watering of  grass shall be by night time sprinkler system. All new plants and grassing shall be maintained after planting. This shall take the form of irrigation,  restacking, pruning, weeding, tilling, etc. to ensure sufficient growth is achieved by all. Once grassed  areas are sufficiently established they shall be kept cut or mown to provide a uniform depth of growth.  Edges of grassed areas shall be trimmed as necessary. All new plants and grassed areas shall be protected to prevent damage from workmen, builders plant, equipment and animals, by the use of temporary fencing or other suitable means.  Any trees, shrubs or areas of grass which fail to satisfactory growth or wither and die shall be replaced. The responsibility for the irrigation and maintenance of these replacement plants shall re- main with the Contractor until such time as they exhibit satisfactory growth.  Size  Height when grown  Spacing  Small  Less than 1 m  500 - 600 mm  Medium  1 - 2 m  900 - 1200 mm  Large  Over 2 m  1800 mm 