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During the 1980s, whole effluent toxicity testing was incorporated into the regulatory control program for municipal and industrial effluents in the USA, as a complement to chemical-specific limitations. While regulating effluent toxicity offered several advantages, it also required the development of means to identify and control sources of toxicity within effluents, which could include toxicants...
Procedures are described for calculating and evaluating sediment effect concentrations (SECs) using laboratory data on the toxicity of contaminants associated with field-collected sediment to the amphipod Hyalella azteca and the midge Chironomus riparius. SECs are defined as the concentrations of individual contaminants in sediment below which toxicity is rarely observed and above which toxicity is...
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