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 Table 4 (Concluded)
Uncertainty Source
Preliminary Ranking
Effects Assessment
Toxicity end points for ecological receptors
Toxicity end points based on body burdens
3
Toxicity end points for human receptors
3
Dose-response models for carcinogens and noncarcinogens
1
Intraindividual/intraspecies
2
Interindividual/interspecies
Exposure period extrapolation
2
1
LOAEL to NOAEL
NR
Timing of exposure (e.g., exposure during sensitive life stages)
Toxicity of complex mixtures of COC (synergism, antogonism)
3
Risk Characterization
Hazard/toxicity quotient approach
NR
Potential for recovery of populations
NR
Estimation of population-level effects
2
(Sheet 3 of 3)
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