No ecological impact on North Seat

The principle of impenetrable defenses extends to include everything that might possibly prove harmful to the environment or cause a disturbance. Nothing leaves the island unchecked.
The solid, basin-like construction of the island, which is designed to withstand extreme forces, offers yet another advantage.
In the event of an accident, the impermeable surface of the island, which is sealed by means of a specially developed concrete compound and surrounded by the sheet pile walls, could contain far more crude than is stored on the island at any one time. Furthermore, the extensive systems of piping and cable ducts are of oil-tight construction, as are the rig cellars.

Top priority is given to protecting the eco-system of the mud flats  

Waste water from the residential quarters and kitchens is purified in the island’s own treatment plant, collected in tanks and then disposed of in a sanitary landfill in the same way as solid waste. Even rain and spray water is collected on the concrete surface and purified.

The reservoir water produced along with the crude by offshore and onshore wells is removed from the oil in special separators at the Land Station and, after passing through various treatment stages, is pumped back into the reservoir through an injection well. The entire process is thus designed as a closed circuit. As all process tanks are linked in a closed system fitted with vapor recovery pipes, emissions are effectively prevented.