Determining Toxicity & When to Use the TCLP Test
- Heavy Metals—Arsenic, Barium, Cadmium, Chromium, Lead, Mercury, Selenium, and Silver
- Pesticides—Endrin, Lindane, Methoxychlor, Toxaphene, Silvex, and more.
- Volatile Organic Compounds (VOCs)—Benzene, Carbon Tetrachloride, MEK, etc.
- Dioxins—Trichlorophenol and Vinyl Chloride
- Separate the liquid and solid portions of the waste (as needed).
- Crush the solid portion of the waste.
- Place the crushed solid portion in a system that simulates the conditions of a landfill by filtering a large quantity of water through it.
- Collect the leachate from the system.
- Recombine the separated liquid portion of the waste (if any) with the collected leachate.
- Analyze the leachate for constituents of concern.
- If the waste is 99.5% or more liquid then the waste itself is the extract, and you can analyze it directly without performing the TCLP. [40 CFR 261.24(a)]
- If a total analysis of the waste, not the extract, demonstrates that the individual contaminants are not present in the waste, or present in levels that could not possibly exceed the regulatory threshold, then you don’t need to run the TCLP. [Section 1.2 of the TCLP procedure]
- For wastes that are 100% physically solid, the maximum theoretical leachate concentration is 1/20 of the total concentration in the waste. If this value is below the regulatory threshold, the TCLP need not be run.[60 FR 66389, December 21, 1995]
- If a wastewater solution contains 5 ppm or more dissolved lead, then it would be a D008 waste. A lower concentration would not be D008.
- If a semisolid sludge contains 5 ppm or more total lead, then it would be a D008 waste. A lower concentration would not be D008.
- If a solid brick or dry ash contains less than 100 ppm dissolved lead, then the extract could not possibly have more than 5 ppm lead, and the solid could not be a D008.
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