
The site was split into two phases, but the design of the surface water was considered as one element covering both stages. During the planning process, it was identified by the local authority that the design included some form of treatment of the surface water on-site to ensure no polluted water could be washed into the harbour or eventually the sea. This meant surface treatment became a planning requirement. It was to be assured that no surface water could be allowed to just wash over the quay wall into the sea and that any water released must be cleaned prior to discharge.