A foreman placed a wooden ladder into a mixing vat that had recently been sprayed with a cleanser called methylene chloride. While on the ladder, he called over to a co-worker to start the fan in the vat. This co-worker was not familiar with the equipment and started the mixer rather than the fan. The mixing blades struck the ladder, on which the foreman was standing, knocking him into the vat. The co-worker put on a respirator mask and entered the vat to help the foreman. His mask was not designed for methylene chloride and soon the laborer became quite dizzy (self-contained […]