a c.4.155 ha site which previously formed part of the overall RTÉ Campus at Montrose, Donnybrook, Dublin 4
16.(b) Prior to commencement of development, the developer shall lodge with the planning authority a cash deposit, a bond of an insurance company or such other security as may be accepted by the planning authority to secure the protection of existing trees to be retained on or adjacent to the site and to make good any damage caused by construction, coupled with an agreement empowering the planning authority to apply such security, or part thereof, to the satisfactory protection of any trees adjacent to or on the site or the replacement of any such trees which die, are removed or become seriously damaged or diseased within a period of three years from the substantial completion of the development with others of similar size and species, or to apply to new tree planting in the local area. The amount of the security shall be determined by the Helliwell or Cavat method by the developer's arboriculturist. The form and amount of the security shall be as agreed between the planning authority and the developer or, in default of an agreement, shall be referred to An Bord Pleanála for determination. (c) Prior to commencement of development, the developer shall retain the professional services of a qualified Arboriculturist throughout the life of the site development works. The Arboriculturist shall advise and supervise all works associated or in proximity to the existing trees to ensure their retention and condition. All trees shown to be retained on the site and adjacent to the site shall be adequately protected during the period of construction as per BS 5837, such measures shall include a protection fence beyond the branch spread, with no construction work or storage carried out within the protective barrier, and as recommended in the tree survey report and associated plans (the tree protection measures shall have regard to the Guidelines for Open Space Development and Taking in Charge, copies of which are available from the Parks and Landscape Services Division).