Exhausted Media Toxicity Testing (TCLP)

Toxicity testing is crucial in determining if your exhausted resin or carbon has become hazardous waste. 

 

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Toxicity Testing & Waste Classification

Industrial manufacturing operations utilizing closed-loop deionized water systems eventually generate exhausted adsorbent media (activated carbon and ion exchange resin) that becomes solid waste. Per Federal Code of Regulations 40 CFR, manufacturers must determine whether this waste exhibits hazardous characteristics.
We assist in classifying your solid waste through a comprehensive process:

  • Waste Classification: We help determine if your waste exhibits characteristics of ignitability, corrosivity, reactivity, or toxicity as defined in 40 CFR, Subpart C, Section 261.20
  • TCLP Testing: For potentially toxic waste, we conduct the Toxicity Characteristic Leaching Procedure (TCLP: EPA Test Method SW-846)
  • Sample Preparation: We prepare your samples and arrange testing with certified laboratories
  • Quality Assurance: Our procedures ensure sample uniformity and exceed all EPA requirements
The TCLP test specifically evaluates waste for heavy metal toxicity contaminants including Arsenic, Barium, Cadmium, Chromium, Lead, Mercury, Selenium, and Silver.

Toxicity Characteristic Leaching Procedure

 

A solid waste exhibits the characteristic of toxicity if it contains an elevated level of a toxicity contaminant. The toxicity contaminants for heavy metals include:

Arsenic, Barium, Cadmium, Chromium, Lead, Mercury, Selenium and Silver

If you know that your waste contains toxicity contaminants, or are uncertain, the test method to use is the Toxicity Characteristic Leaching Procedure (TCLP: EPA Test Method SW-846). The TCLP test method has six steps:

  1. Separate the liquid and solid portions of the waste (as needed).
  2. Thoroughly mix the waste sample.
  3. Place the mixed sample in a system that simulates the conditions of a landfill by filtering a large quantity of water through it.
  4. Collect the leachate from the system.
  5. Recombine the separated liquid portion of the waste (if any) with the collected leachate.
  6. Analyze the leachate for constituents of concern.

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