HAZWOPER requirements apply to which of the following?

The choice related to voluntary clean-ups at uncontrolled hazardous waste sites is correct because the HAZWOPER (Hazardous Waste Operations and Emergency Response) standard is specifically designed to protect workers engaged in activities related to hazardous waste clean-up operations, including those at uncontrolled sites. The HAZWOPER standard sets forth a range of safety requirements and training for personnel involved in these activities to minimize their exposure to hazardous substances and ensure their safety while working in potentially dangerous environments.

Voluntary clean-ups fall under the broader umbrella of hazardous waste operations, as they often involve dealing with contaminated soil, groundwater, or other materials that require careful handling according to established health and safety regulations. This standard is fundamental for ensuring that proper safety protocols are followed to protect individuals and the environment during such efforts.

In contrast, the other scenarios presented do not typically fall under HAZWOPER requirements. Routine sanitary sewer operations generally do not involve hazardous substances and are typically subject to different regulatory frameworks. Small quantity generators of hazardous waste might need to follow some hazardous waste regulations, but they are typically not involved in the kind of hazardous waste operations that HAZWOPER addresses. Similarly, water treatment plant operators are primarily regulated under different sets of rules focused on drinking water quality and treatment processes,