Workers compensation exposures are extreme. Employees work with chemicals that can result in burns or eye, skin, or lung irritation. Falls from heights, cuts, burns, lung damage, and lifting injuries are possible. An explosion could result in a large number of workers being killed. Since refineries may operate 24 hours a day, 7 days a week, adequate supervision is required for all workers. Training, careful monitoring, use of safety equipment and adherence to strict disciplines are the only way to prevent accidents that can maim or kill.