Hazardous materials (hazmat) removal workers identify and dispose of asbestos, radioactive and nuclear waste, arsenic, lead, and other hazardous materials. They also clean up materials that are flammable, corrosive, reactive, or toxic. Hazmat removal workers face different working conditions, depending on their area of expertise. Some must wear fully enclosed protective suits for several hours at a time. Completing projects often requires night and weekend work. Overtime also is common, especially for emergency or disaster response workers.