How does RCRA define hazardous waste?

How does RCRA define hazardous waste?

• A. A waste that is always radioactive.
• B. A solid waste that is listed in 40 CFR 261.31–261.33 or exhibits one or more hazardous characteristics (D001–D043) or is a listed mixed waste.
• C. A solid waste that is recyclable.
• D. A waste that is generated by a hospital.

Answer: (B)

Hazardous waste under RCRA is defined as a subset of solid waste that either appears on the official hazardous-waste lists (found in 40 CFR 261.31–261.33) or exhibits one or more hazardous characteristics (D001–D043), or is a listed mixed waste (hazardous and radioactive). In other words, a waste must first be a solid waste, and it becomes hazardous if it fits either a listed category or shows a characteristic that signals danger, such as ignitability, corrosivity, reactivity, or toxicity. The “mixed waste” provision covers wastes that are both hazardous and radioactive, requiring separate regulatory attention. This definition emphasizes two pathways to hazard: being specifically listed for hazard in the regulations, or possessing properties that make the waste dangerous regardless of its source. Examples include wastes that are on the list as particular waste streams, or wastes that are ignitable (D001), corrosive (D002), reactive (D003), or toxic (D004–D043). Other options miss the essential point. Not all hazardous waste is radioactive, so a blanket claim that it’s always radioactive is incorrect. Waste can be hazardous without being recyclable, so recyclability isn’t the defining feature. And while a hospital may generate hazardous waste, generation source (e.g., hospital) does not determine whether a waste is hazardous under RCRA.

Hazardous waste under RCRA is defined as a subset of solid waste that either appears on the official hazardous-waste lists (found in 40 CFR 261.31–261.33) or exhibits one or more hazardous characteristics (D001–D043), or is a listed mixed waste (hazardous and radioactive). In other words, a waste must first be a solid waste, and it becomes hazardous if it fits either a listed category or shows a characteristic that signals danger, such as ignitability, corrosivity, reactivity, or toxicity. The “mixed waste” provision covers wastes that are both hazardous and radioactive, requiring separate regulatory attention.

This definition emphasizes two pathways to hazard: being specifically listed for hazard in the regulations, or possessing properties that make the waste dangerous regardless of its source. Examples include wastes that are on the list as particular waste streams, or wastes that are ignitable (D001), corrosive (D002), reactive (D003), or toxic (D004–D043).

Other options miss the essential point. Not all hazardous waste is radioactive, so a blanket claim that it’s always radioactive is incorrect. Waste can be hazardous without being recyclable, so recyclability isn’t the defining feature. And while a hospital may generate hazardous waste, generation source (e.g., hospital) does not determine whether a waste is hazardous under RCRA.