Which agency's regulations are NOT mentioned in the compliance requirements for hazardous waste sites?

The regulations of the Department of Labor (DOL) are not typically associated with the compliance requirements specifically for hazardous waste sites. The primary focus of hazardous waste management falls under the auspices of environmental protection and safety, areas predominantly governed by agencies like the Environmental Protection Agency (EPA), the Department of Transportation (DOT), and the Occupational Safety and Health Administration (OSHA).

The EPA is responsible for implementing regulations under the Resource Conservation and Recovery Act (RCRA), which governs the management and disposal of hazardous waste. The DOT oversees the transportation of hazardous materials, ensuring that such movements comply with safety standards to prevent accidents during transit. OSHA, on the other hand, establishes workplace safety standards, including those relevant in environments where hazardous materials are handled.

In contrast, the DOL is primarily focused on labor standards, workplace rights, and employee benefits rather than direct environmental management or hazardous waste regulations. Therefore, it does not feature prominently in the context of compliance requirements for hazardous waste sites, making it the correct answer in this scenario.