Toxicity Characterizing Leachate Procedure (TCLP) threshold is which of the following?

Toxicity Characterizing Leachate Procedure (TCLP) threshold is which of the following?

• A. 0.5 ppm or Greater
• B. 5.0 ppm or Greater
• C. 10 ppm or Greater
• D. 50 ppm or Greater

Answer: (B)

Toxicity Characterizing Leachate Procedure (TCLP) uses a lab extraction to mimic how waste might leach contaminants in a landfill, and then checks the concentration of those contaminants in the leachate. The threshold is the regulatory limit that, if met or exceeded in the TCLP extract, marks the waste as exhibiting the toxicity characteristic and thus being hazardous. For many metals, this limit is 5 mg/L (ppm), so the TCLP threshold cited here is 5.0 ppm or greater. If the leachate from a waste shows a contaminant at or above that level, the waste would fail the characteristic and be managed as hazardous; if it’s below, the waste typically does not. (Note that the exact limit can vary by contaminant, but 5.0 ppm is the common reference used in this context.)

Toxicity Characterizing Leachate Procedure (TCLP) uses a lab extraction to mimic how waste might leach contaminants in a landfill, and then checks the concentration of those contaminants in the leachate. The threshold is the regulatory limit that, if met or exceeded in the TCLP extract, marks the waste as exhibiting the toxicity characteristic and thus being hazardous. For many metals, this limit is 5 mg/L (ppm), so the TCLP threshold cited here is 5.0 ppm or greater. If the leachate from a waste shows a contaminant at or above that level, the waste would fail the characteristic and be managed as hazardous; if it’s below, the waste typically does not. (Note that the exact limit can vary by contaminant, but 5.0 ppm is the common reference used in this context.)