There was fixed ladder installed to give access of workers to go up to the roof of Utility building e.g. for maintenance purpose, and there were 2 others attached to evaporators units at Utility area, however there was no warning signs at these points that working permit is required to protect workers from injuries from falling when working at height. KORE ES-RQ-135 requires permit program to be available when working at above 2 meters where fixed platforms and standard railings were not provided. The roof of Utility building and evaporation units was not provided with standard railings. The roof was more than 7 meters above ground while the top of evaporation units was around 3 meters above ground.