Conclusions
Exposure dependent upon
- Accessibility
- Availability
- Organism Assimilative Capacity
Accessibility limited to upper 10-15 cm in stable sediments
Availability may be limited by sequestration
Assimilation defined largely by sediment-water partitioning
- Porewater fate processes allow continued release of sequestered contaminants (Controlled by release dynamics)
- Accumulation consistent with two stage model of uptake in benthic macroorganisms (Controlled by release equilibrium)