Under which law are owners required to remove hazardous wastes?

The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), often referred to as the Superfund law, is the correct choice because it was enacted specifically to address the cleanup of hazardous waste sites and to hold responsible parties accountable for the release of hazardous substances into the environment. Within this framework, owners of contaminated properties are required to remediate hazardous waste in order to protect public health and the environment. This law underscores the obligation to investigate and clean up sites where hazardous substances may pose a risk, thus ensuring that property owners take responsibility for environmental hazards.

The other options represent different aspects of environmental law but do not specifically mandate the removal of hazardous wastes by property owners. The Hazardous Substances Act primarily governs the management and cleanup of hazardous materials but does not impose direct obligations on owners. The Water Pollution Control Act focuses on regulating discharges into water bodies, and the Clean Air Act establishes standards for air quality but does not directly deal with hazardous waste removal from property sites. Therefore, CERCLA is integral to the legal framework governing the management of hazardous waste contamination.