A worker and his supervisor were working in a confined space using a flammable substance and an acetylene torch. The confined space was a freshwater pumping station. The two men were installing rigid foam insulation to the inside of concrete walls by using a flammable glue. The walls were wet from condensation, so they were using the acetylene torch repeatedly through the day to dry the wall before applying the glue. Before they started work, they had read the flammable liquid warning label and then experimented to see if the glue would burn. They had dabbed some on the cement […]