How do we choose among the options?

• Ultimate Goal - Reduction of Risk
• How? Elimination of exposure/exposure pathways
• Complications

  • Human Risk - Selection and quantification of exposure pathways/effects?
  • Ecological Risk - Pathways? Exposed Species? Effects?
• Surrogate measures

  • Mass Removal

    • Reduction in whole sediment concentration
    • Commonly used and just as commonly misses the mark!
  • Alternative Goals – all defined by natural process controlled exposure

    • Reduction in surface sediment concentration
    • Reduction in fish tissue levels
    • Reduction in water column levels

Previous slide

Next slide

Back to first slide

View graphic version