Hierarchy for Selection of Marine Benchmarks

• Preference was given to the benchmarks based on chronic exposure, non-lethal endpoint studies designed to be protective of sensitive species.
• Absent chronic exposure benchmarks, values based on acute studies for multiple species adjusted with acute to chronic ratios were selected.
• The lowest reported effect level with a safety factor of ten to protect for a more sensitive species and/or with a safety factor of ten to convert from acute to chronic.
• Absent a marine value, refer to Region 3 freshwater tables.

Author: Bruce Pluta (Region 3)
Date: July 2006
Description: Screening benchmarks for marine surfacewater in Region 3
Keywords: marine, surfacewater, screening benchmarks, risk assessment, Superfund, Region 3, water, ERAGS, SLERA

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