Which of the following is a responsibility of the Environmental Protection Agency (EPA) regarding HAZMAT?

The responsibility of the Environmental Protection Agency (EPA) regarding hazardous materials (HAZMAT) includes regulating the cleanup of hazardous waste sites. This role is essential to ensuring that contaminated areas are properly managed to protect public health and the environment. The EPA establishes guidelines and oversees the processes involved in the identification, assessment, and remediation of hazardous waste sites through programs such as the Superfund program. This initiative is designed to clean up sites contaminated with hazardous substances and to ensure that those responsible for the contamination are held accountable.

The other options may involve related areas of HAZMAT management but do not fall under the EPA's primary responsibilities. For instance, while first aid training is important, it is not a function of the EPA. Drafting legislation for HAZMAT transportation typically falls under the jurisdiction of other regulatory bodies such as the Department of Transportation (DOT). Enforcing criminal penalties for hazardous violations is a function that may be part of law enforcement agencies and may involve the EPA, but the primary responsibility of overseeing cleanup efforts is a distinct and critical part of the EPA's mandate.