Identify a unit that is not included in Clean Closure scope.

Identify a unit that is not included in Clean Closure scope.

• A. Tanks
• B. Groundwater treatment unit
• C. Drip pads
• D. Incinerators

Answer: (B)

Clean closure means closing a hazardous waste management unit in a way that leaves no hazardous waste or residues that could migrate off-site. It applies to units that actually contain or hold wastes and could leave decontaminated surfaces behind, such as tanks, drip pads, and similar containment structures, where you can remove wastes and decontaminate to background conditions. A groundwater treatment unit isn’t included in clean closure because its purpose is to treat contaminated groundwater rather than permanently contain and remove waste residues from a unit boundary. When such a unit is closed, you can’t guarantee that all contaminants in groundwater or surrounding soils are removed to background levels; ongoing monitoring and potential remediation may be required. Therefore, its closure falls outside clean closure scope and follows other closure requirements.

Clean closure means closing a hazardous waste management unit in a way that leaves no hazardous waste or residues that could migrate off-site. It applies to units that actually contain or hold wastes and could leave decontaminated surfaces behind, such as tanks, drip pads, and similar containment structures, where you can remove wastes and decontaminate to background conditions.

A groundwater treatment unit isn’t included in clean closure because its purpose is to treat contaminated groundwater rather than permanently contain and remove waste residues from a unit boundary. When such a unit is closed, you can’t guarantee that all contaminants in groundwater or surrounding soils are removed to background levels; ongoing monitoring and potential remediation may be required. Therefore, its closure falls outside clean closure scope and follows other closure requirements.