Forthbank Wind Energy Development - Partnerships for Renewables

Forthbank Wind Energy Development
Potential Construction Effects on Made Ground
Landfill
13.4.33 Excavation of the turbine foundations will cause disturbance of both landfill leachate and
landfill gas at the south-western part of the site, and may result in mobilisation of leachate and
gas. The excavation of the foundations will also cause damage to the landfill cap. There is the
potential for both the release of landfill gas and air ingress during construction.
13.4.34 Excavation of turbine foundations may also have the potential to damage the leachate
collection system and monitoring boreholes.
13.4.35 It is expected that landfill material will be removed and exported from the site during
excavations. Waste classification of material to be removed will be required. Temporary
works such as levelling of the site at the turbine foundations may also require landfill material
to be removed and exported from site.
13.4.36 Disturbance and removal of the landfill material as well as the presence of construction plant
may impact on the stability of the landfill. The presence of construction plant on the landfill
may also impact on stability.
13.4.37 Landfill gas may collect in confined spaces during excavations.
13.4.38 The magnitude of these impacts on the landfill is considered to be moderate.
Restored area to the north-west
13.4.39 Excavation of turbine foundations and any temporary works such as levelling of the site at the
restored area may encounter made ground and structures associated with the historical land
uses at this part of the site, which will be removed and exported from the site.
13.4.40 Excavation of the turbine foundation in potential made ground may result in any contamination
being mobilised and having the potential to impact on the underlying bedrock.
13.4.41 The magnitude of these impacts on potential made ground at the restored area is considered
to be minor.
Potential Operational Effects
13.4.42 The following infrastructure will be retained on-site during site operations:
• access tracks;
• turning areas;
• turbine bases;
• substation (along with site office and welfare facilities);
November 2010 Chapter 13 Page 25
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