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Waste Characterization and Classification Flashcards

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  1. Under RCRA, which characteristic makes a solid waste a hazardous waste due to its ability to cause fire during routine waste management?

    Answer: Ignitability

    Ignitability is defined under 40 CFR 261.21 and includes liquids with flash points below 60°C, non-liquids that can catch fire, and oxidizers.

  2. A waste stream has a pH of 2.5. Under RCRA, this waste would be classified as hazardous due to which characteristic?

    Answer: Corrosivity

    Corrosivity applies to aqueous wastes with pH ≤ 2 or ≥ 12.5, or liquids that corrode steel at a specified rate, per 40 CFR 261.22.

  3. Which EPA waste code series (F-codes) applies to non-specific source hazardous wastes from common industrial processes?

    Answer: F-list wastes

    F-list wastes (40 CFR 261.31) are hazardous wastes from non-specific sources such as solvent use and electroplating operations.

  4. What is the primary purpose of a Toxicity Characteristic Leaching Procedure (TCLP) test?

    Answer: Simulate leaching of contaminants into groundwater from a landfill

    TCLP simulates acidic leachate conditions in a co-disposal landfill to evaluate whether contaminants could migrate to groundwater.

  5. Which of the following is a P-listed (acutely hazardous) waste under RCRA?

    Answer: Potassium cyanide when discarded

    P-listed wastes are discarded commercial chemical products that are acutely toxic; potassium cyanide (P098) is one example listed at 40 CFR 261.33(e).

  6. A generator produces 150 kg of hazardous waste in a calendar month. Which generator category does this facility fall under?

    Answer: Very Small Quantity Generator (VSQG)

    Facilities generating 100 kg or less per month (up to 1 kg for acutely hazardous waste) are VsQGs under 40 CFR 262 Subpart L; 150 kg/month places the generator in the SQG category.

  7. In waste characterization, what does the term 'Derived-From Rule' specify?

    Answer: Residuals from treating hazardous waste remain hazardous unless delisted

    The Derived-From Rule states that residuals (ash, sludge, leachate) generated from treating, storing, or disposing of listed hazardous waste are still listed hazardous wastes unless formally delisted.