Table 19.3 Embedded Mitigation in relation to Soils, Geology and Ground Condition Parameter
General Construction
Mitigation measures embedded into the project design
The construction footprint has been minimised as far as practicable (see Chapter 5 Description of the Development). Land would be reinstated to its pre-construction condition as soon as reasonably possible following cable installation, dependent on weather conditions and excluding the converter station and jointing locations.
A Code of Construction Practice (CoCP) will be developed in consultation with the contractor and the Environment Agency. The CoCP will include measures for avoiding the likelihood of spills and leakages, such as:
Store oils and fuel within designated areas above ground and in impervious storage bunds with a minimum of 110% capacity to contain any leakages or spillages, in addition storage areas will be regularly inspected to identify any leak or spills;
Limit refuelling activities to designated, impermeable surfaced areas and use drip traps where possible;
Check and maintain equipment regularly to ensure that leakages do not occur;
Have spill kits available on site at all times; and
Ensure site inductions for all staff, to include the above procedures and the locations of spill kits.
Landfall Construction
The use of HDD techniques beneath the cliffs.
Landfall and onshore cable route Construction
The preparation and implementation of a Code of Construction Practice throughout the construction works to include:
The separate storage of topsoil and excavated materials, to prevent mixing of subsoil and topsoil, thus improving reinstatement.
Minimising excavation volumes and disturbance to the surrounding areas, together with the replacement of any soils inadvertently disturbed during excavations in general accordance with their original structure and location.
It is likely that soils will be reused on site. Soils that cannot be re- instated would follow a waste hierarchy following the CL:AIRE Code of Practice (2011).
Temporary ramp construction over the cliffs at landfall, where the Red Crag is absent, will be constructed to an agreed method statement approved by the planning authority in consultation with Natural England.
Onshore cable route Project design
Initial cable routeing, jointing pit location and site selection to avoid key sensitive land uses where possible e.g. potentially contaminated sites, landfills, mineral extraction areas.
HDD to avoid impacts upon sensitive features where practicable.
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 19 Soils, Geology and Ground Condition Page 12
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