Guide values for contaminated sites in Baden-Württemberg

Area of Science:

• Environmental Science
• Environmental Law
• Remediation Engineering

Background:

• Hazardous site remediation in Baden-Württemberg relies on three key legal documents.
• The guide values directive (UM & SM B-W, 1993) establishes a three-level hierarchy for investigation and remediation objectives.
• Remediation decisions balance feasibility and environmental impact.

Purpose of the Study:

• To outline the regulatory framework for hazardous site treatment in Baden-Württemberg.
• To explain the three-level hierarchy of remediation objectives.
• To detail the criteria for determining appropriate remediation levels.

Main Methods:

• The study describes a three-tiered approach to hazardous site remediation.
• Level 1: Background values are the primary remediation goal.
• Level 2: Generic assessment values for worst-case exposure, considering groundwater, human health, and soil.
• Level 3: Site-specific requirements derived from feasibility and environmental balance, including contaminant concentrations and fluxes for groundwater.

Main Results:

• The guide values directive provides a structured approach to hazardous site remediation.
• Remediation levels are determined by feasibility and environmental considerations.
• Level 3 uniquely regulates both contaminant concentrations and fluxes into groundwater.

Conclusions:

• The Baden-Württemberg hazardous site remediation framework offers a comprehensive, tiered approach.
• The directive's unique regulation of contaminant fluxes into groundwater is a significant aspect.
• The system prioritizes background values, with adaptive levels based on practical and environmental factors.