On 13th of November 2020 after TBT meeting and visual inspection of the chemical bags by crew members, mixing chemical at hopper area started. The lifting was initiated by using 4 leg chemical Bag lifter. Crane operator started lifting the chemical bag towards the hopper. Once the bag reached around 2.5 meter height beside the hopper its fell down and landed at the mixing platform . Temporary No go zone was managed and no one was in the area.