SECTION B - Derry City Council

• Contamination: Do not mix topsoil with:
- Subsoil, stone, hardcore, rubbish or material from demolition work.
- Other soil or material containing aggressive weeds, sharps, plastics
and non soil forming
materials and notifiable animal or plant diseases.
- Oil, fuel, cement or other substances harmful to plant growth.
- Other classifications of topsoil.
• Multiple handling: Keep to a minimum. Use topsoil immediately after stripping.
168 GENERAL SITE CLEARANCE
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General: Clear site of all rubbish, debris and vegetation. Do not compact topsoil,
leaving site ready for planting works
Treatment: translocated herbicide
Works to be undertaken during reasonable dry weather to avoid compaction
Taken off site or suitable material to be used as fill material in the Chapel Garden
Keep all roads clean and tidy during the works
174 POTECTION OF EXISTING VEGETATION
Protect all Vegetation and Trees to be retained with appropriate fencing during
the works as per BS 5837: 2005 Trees in relation to Construction
175 TREE ROOT BARRIERS (Reroot 2000 – 1mm thick by 2000mm deep)
o Root barrier: Reroot 2000 linear root barrier or equal and approved
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Product reference: RER 210 - Reroot 2000 – 1mm thick by 2000mm deep, 100lm
rolls
Supplier: Greenleaf Ireland, Ivy House, 24a Church Road, L'Derry BT47 3QQ
Tel: +44 (0)28 7134 5620
Location: to be fitted tightly to the base of retaining walls to protect base of
retaining walls and concrete foundations – see Engineers details
Installation: as per manufacturer’s instructions. Join all ends by overlapping and
tape both sides with Greenleaf Reroot jointing tape where required
Backfill material: Good quality topsoil 700-900mm deep, on 400-600mm
subsoil, left in preparation for the landscape Contractor to plant Trees and
Shrubs
Backfilling: Lay and compact lightly in layers not more that 300mm thick.
176 TREE ROOT BARRIERS (Reroot 2000 – 2mm thick by 1500mm deep)
o Root barrier: Reroot 2000 linear root barrier or equal and approved
o Product reference: RER 220 - Reroot 2000 – 2mm thick by 1500mm deep, 100m
rolls
o Supplier: Greenleaf Ireland, as above
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