A 40-year-old auto mechanic died in an explosion at his auto repair shop. His two employees had left about 10 minutes earlier, and he was the only one working in the building at the time. He was repairing an old barrel that was used to hold waste motor oil. He had constructed a system to drain used motor oil from cars to the barrel. This system had an articulated arm made of one-inch steel pipe, an oil pan attached to one end and an adjustable support rig at the other end. The pipe connected into a hole on top of the barrel […]