Storage of chemicals or any combination or separation on chemical substances should be done in a closed system. Not cause evaporation to the workplace because they are local people working in the area.
The chemical mixing or separation, or any of the substance should be done in a closed system. Not to evaporate into the workplace because there are people working in the area.
Storage of chemicals or separation, mixing, or make any chemicals should be done in a closed system. To prevent evaporation into the workplace because pregnant women working in the area.