Before revision: Measures or defined limits include: no-effect concentration (NEC), no-observed-effect concentration (NOEC) , no-observed-adverse-effect level (NOAEL) lowest-observed-adverse-effect level (LOAEL) acceptable operator exposure level (AOEL)thefreedictionary.com/AOEL Retrieved on June 19, 2009 ECx (in percentage).
After revision: Measures or defined limits include: no-effect concentration (NEC), no-observed-effect concentration (NOEC) or similarlyno-observed-adverse-effect level (NOAEL), also called lowest-observed-adverse-effect level (LOAEL) acceptable operator exposure level (AOEL)thefreedictionary.com/AOEL Retrieved on June 19, 2009 ECx (in percentage).