Due to the complexity of the site, ecological risks could not be excluded, and the site was identified as a potential national priority site.
Sustainability and resilience assessment
Prior to engaging in further investigations or engaging in remedial options assessment, a sustainability and resilience assessment of alternative risk management strategies was conducted to help the client, regulators, and other stakeholders to better understand the effects and resilience of alternative strategies in long-term (100+ years).
The assessment was based on three scenarios:
(1) Baseline scenario: accept the risk
(2) Management scenario: reduce loading to NATURA habitat
(3) Elimination scenario: remediate the site completely
Based on sustainability assessment it was assessed that elimination scenario (3) was the most sustainable and resilient long-term approach in terms of its ecological, social and economic effects.
Using sustainability and resilience assessment for alternative risk management strategies early in the decision-making process enabled creating a shared understanding of the long-term impacts and expectations, and to direct further investigation and design efforts in a cost-efficient way.