The “Region 3 BTAG Screening Benchmarks” tables do not provide a value for a compound at my site. Can I develop an alternate value?
In general, when a BTAG value is not available, we recommend carrying a compound through the screening level assessment and providing justification for dropping or retaining the compound for further evaluation in the ecotoxicological and fate and transport discussions that will be provided in the baseline problem formulation. As approved by BTAG, alternate values may be considered if they are from one of the following sources and the source of the value is clearly cited: • EPA’s Ecological Soil Screening Levels • EPA EcoTox Thresholds; • NOAA SQuiRT values (current values may also be used to update the historical ER-L values previously used as a BTAG value); • CCME (Canadian Council of Ministers of the Environment) Canadian Environmental Quality Guidelines; and, • Oak Ridge National Laboratory Screening Benchmarks (appropriate safety factors must be applied to values not based on “no effects” data). The revised Region 3 BTAG Screening Benchmarks for Freshwater and Freshwater Sediment w
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