The pollutants that are now to be decontaminated come from the historical mining in the area.

The activities that have been conducted have contributed to pollutants of heavy metals such as lead, arsenic, cadmium and mercury.

- Investigations and measures at the Sala Silver Mine are carried out carefully so as not to disturb the cultural environment or the visiting activities at the mine. With the decision from the Swedish Environmental Protection Agency, a large part of the investigations and measures can be completed during the time Sala Silvergruva has closed to visitors, says Jennie Hesslöw, CEO of Sala Silvergruva.