Calculated value of a chemical in the environment on the basis of exposure models such as the
European Union System for the Evaluation of Substances The European Union System for the Evaluation of Substances (EUSES) is a mathematical model for calculation of Predicted Environmental Concentrations (PEC) and human exposure. It may be used in Chemical Safety Assessments (CSA) and be cited in Chemi ...
(EUSES). Used in the context of
Chemical Safety Assessments (CSA) and referenced in Chemical Safety Reports (CSR).
PECs may be compared with
Measured Environmental Concentration An Measured Environmental Concentration (MEC) relates to a chemical substance found in an environmental sample. The concentration of the compound may result from direct contamination, transformation and/or metabolization of a different chemical cont ...
s (MEC) if available.
Toxicology
Chemical safety
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