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Page Title:
Table 4. Preliminary Ranking of Sources of Uncertainty |
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 Table 4
Preliminary Ranking of Sources of Uncertainty
Uncertainty Source
Preliminary Ranking
Tier I Evaluation
Identification of COCs
3
Sampling uncertainty
1
Spatial representativeness
1
Analytical uncertainty
1
Dredged material physical and chemical characteristics
1
Description of dredging and disposal activities including quantity of material to be dredged
1
Selection of reference sediment
NR
Tier II Evaluation
Water Column Impact
Numerical mixing models
2
Benthic Impact
2
Theoretical bioaccumulation potential for nonpolar organics
Equilibrium sediment guidelines
2
Tier III Evaluation
Water Column Bioassay
Precision of bioassay
1
2
Interpretation of bioassay
Sediment Bioassay
Precision of bioassay
1
2
Interpretation of bioassay
Benthic Bioaccumulation
2
Bioavailability from sediments
Trophic transfer
Fish
3
3
Piscivorous birds
Tier IV Evaluation: Chronic Bioassays
Chronic Bioassays
1
Precision of bioassay
5
Interpretation of bioassay
(Sheet 1 of 3)
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