Toxic List swf
Toxic Characteristic Leaching Procedure (TCLP) and Waste Extraction Test (WET) are test methods used in California to determine whether a waste is a toxic hazardous waste. They are similar in that they:
However, the similarity ends there: TCLP is not interchangeable with the WET and total analysis is not interchangeable with TCLP or WET.
The main differences between TCLP and WET are found both in laboratory analysis methods and the regulated chemicals that are tested:
When a chemical in a solid waste is 100% soluble in the waste, then the theoretical maximum extractable concentration is:
For example, let’s say a solid waste has a 530 mg/kg total lead concentration. Without conducting a TCLP or WET, the theoretical the maximum soluble results are:
TCLP Wet swf
RCRA Listed Hazardous Waste Delisting Other Listed Waste (Article 4.1) California Listed Mixture Rule