Step 1 is the screening-level problem formulation process and ecological effects evaluation (highlight 1-1 defines screening-level risk assessments)
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Ecological Risk Assessment Guidance for Superfund: Process for Designing and Conducting Ecological Risk Assessments, Steps 1-4, June, 1997 (PDF)(49 pp, 186 K)
Step 1 is the screening-level problem formulation process and ecological effects evaluation (highlight 1-1 defines screening-level risk assessments)