Before revision: Measures or defined limits include: No effect concentration (NEC) or No Observed Effect Concentration (NOEC ) Acceptable Operator Exposure Level (AOEL)thefreedictionary.com/AOEL Retrieved on June 19, 2009 ECx (in percent) No effect concentration No effect concentration (NEC) is a risk assessment parameter that represents the concentration of a pollutant that will not harm the species involved, with respect to the effect that is studied.
After revision: Measures ,), No observable adverse effect level (NOAEL)Lowest-observed-adverse-effect level (LOAEL defined limits include: No effect concentration (NEC) or No Observed Effect Concentration (NOEC ) Acceptable Operator Exposure Level (AOEL)thefreedictionary.com/AOEL Retrieved on June 19, 2009 ECx (in percent) No effect concentration No effect concentration (NEC) is a risk assessment parameter that represents the concentration of a pollutant that will not harm the species involved, with respect to the effect that is studied.