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?
- Even if we understood effects, long response time
- Surrogate measures
- Mass Removal - Reduction in whole sediment concentration
- Mass flows very useful as indicator of implementation effectiveness
- Does not directly relate to elimination of risk
- Alternative Goals – all defined by natural process controlled exposure
- Reduction in surface sediment concentration
- Reduction in fish tissue levels
- Reduction in water column levels