⁃ Pike area to fire--> because it is a machine control system. Activities at risk. Cleaning a distillation tower as methanol. When the refining process Oil with methanol. Heat a mixture of methanol will evaporate. Subject to precipitation of salts or oil vapor of methanol surviving. To remain on top of the tower When the tower opens Originally to be cleaned with a closed system. when oxygen To meet the fuel that sparks cause fire. 2. Working in confined spaces. 3 moving equipment inside the tower from a height down to clean. Such as pall ring and demister pads to clean the outside of the tower.