Clean Closures apply to which units?

Clean Closures apply to which units?

• A. Tanks, surface impoundments, Incinerators, drip pads
• B. Pipelines and wells
• C. Storage drums and containers
• D. Only landfills

Answer: (A)

Clean closure means closing a hazardous waste management unit in a way that removes or decontaminates all residual hazardous waste to background conditions. This requirement applies to units that handle waste in bulk and can leave residues on interior surfaces or surrounding soil. Tanks, surface impoundments, incinerators, and drip pads fit this scenario because they contain, process, or collect waste and can accumulate residues that must be removed or decontaminated when the unit is closed. Pipelines and wells are typically addressed under different regulatory closures (often plugging or abandonment rules outside the clean-closure framework), while storage drums and containers are closed by sealing without the decontamination-and-residue-removal process of a clean closure, and landfills have their own closure standards. So the best answer is the set that includes tanks, surface impoundments, incinerators, and drip pads.

Clean closure means closing a hazardous waste management unit in a way that removes or decontaminates all residual hazardous waste to background conditions. This requirement applies to units that handle waste in bulk and can leave residues on interior surfaces or surrounding soil. Tanks, surface impoundments, incinerators, and drip pads fit this scenario because they contain, process, or collect waste and can accumulate residues that must be removed or decontaminated when the unit is closed. Pipelines and wells are typically addressed under different regulatory closures (often plugging or abandonment rules outside the clean-closure framework), while storage drums and containers are closed by sealing without the decontamination-and-residue-removal process of a clean closure, and landfills have their own closure standards. So the best answer is the set that includes tanks, surface impoundments, incinerators, and drip pads.