The HAZWOPER standard specifically covers which three distinct groups of individuals?

The HAZWOPER standard, which stands for Hazardous Waste Operations and Emergency Response, is designed to protect workers involved in hazardous waste cleanup and emergency response operations. The correct answer identifies three specific groups covered under this standard: employees at treatment, storage, and disposal (TSD) facilities, individuals engaged in the cleanup of Superfund sites, and emergency responders.

Employees at TSD facilities are included because this standard provides guidance on safe practices and necessary training for individuals handling hazardous waste in these environments, ensuring they are equipped to manage risks effectively. Those involved in cleaning up Superfund sites are also covered, as these locations can pose significant health and safety risks due to hazardous materials. Emergency responders are another critical group addressed by HAZWOPER, as they must be prepared to respond to spills or accidents involving hazardous substances to protect lives and the environment.

The other options, while consisting of roles that may interact with hazardous materials, do not align as closely with the specific coverage of the HAZWOPER standard as the correct answer does. The emphasis of HAZWOPER is on those directly involved in handling hazardous waste and emergency responses, ensuring proper training and safety measures are in place.