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drainage pattern of the land once construction has been completed. Drainage ditches will be reinstated in line with this OCoCP to ensure that there are minimal changes to the drainage regime once construction and reinstatement are complete.


93


Drainage systems put in place in working areas and construction consolidation sites will ensure that existing drainage patterns are only minimally affected. Where permanent drainage systems are required (only at the converter station location), these will be designed in accordance with a Surface Water and Drainage Management Plan, to be approved by the Local Planning Authority. Separators will be provided where the drainage water may be impacted by oil contamination.


8.2 Contaminated Land


8.2.1 Current Knowledge of Contaminated sites 94


Chapter 20 of the ES details the assessment of contaminated land for EA ONE. The key sensitivity is a historical landfill site at Tuddenham St Martin. Principal and secondary aquifers underlie the majority of the preferred onshore cable route, with source protection zones present in some areas and nitrate protection zones present along the whole route.


95 96


Contaminated sites located within or close to the proposed onshore cable route are set out in the ES (Chapter 20, Volume 3).


On the basis of this assessment, Table 3 below outlines requirements for site investigations.


Outline Code of Construction Practice. Version 3.


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