Strategy:
	• Treatment high ecotoxicity preventing biological processes
	• Assess bioremediation options (feasibility study)
	• Apply low cost biological treatment where possible
	Stepwise approach:
	In agreement with the local EPA:
	Step 1: In case the contaminants are known to be biodegradable perform biofeasibility study how to optimize existing biodegradation potential on site.
	Step 2: In case the contaminants are leaving the site and pose a risk intermediate securement/containment wells to prevent further spreading of contaminants during active remediation.
	Step 3: Safeguard any potential risks to neighbours and employees from emissions during active and passive remediation.
	Step 4: Review of undetected major sources (i.e. underground storage tanks).
	Step 5: Remove hot-spots and free-phase material which represent high ecotoxicity.
	Step 6: Initiate and optimize bioremediation.
	Step 7: Stop active bioremediation when the contaminant concentration in the monitoring wells at the site boundary are steadily below the agreed target values.