contaminant issues have been identified within the study area as outlined in section 19.5.


125. Three landfill sites encroach the onshore cable route at Culpho Hall, Bamford Dairy and Tuddenham St Martin. The exact content of the landfills is unknown and a variety of contaminants may be present with the potential to produce leachate and landfill gases. As this hazard is considered to be local in nature and no man entry will be required into the excavations, a minor adverse impact is anticipated during construction.


126. Operationally, where maintenance is required there is the potential for hazardous gas to migrate via permeable strata and accumulate in confined spaces and / or buildings on site. However this is considered localised in nature and will be of low magnitude. No confined spaces will remain during operation therefore the likelihood for the build-up of gas will be low to negligible. This would lead to a minor adverse impact for the entire onshore electrical transmission works. Additional mitigation measures are provided in Table 19.18.


127. Adhering to the mitigation outlined in this chapter and to be set out in an Outline CoCP to be submitted with the application, and based on the previously defined magnitude and sensitivity, it is anticipated that there would be a minor adverse to negligible residual impact on soil, geology and ground condition during operation.


128. It is anticipated that the onshore cable would be decommissioned (de-energised) and trenched cables left in-situ. Whilst details regarding the decommissioning of the converter stations are currently unknown, considering the worst case scenario, which would be the removal and reinstatement of the current land use at the site, it is anticipated that the impacts would be similar those during construction.


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 19 Soils, Geology and Ground Condition Page 50


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58