Fire and fatalities during material movement in a lift

In an accident, two persons died while moving a medicine in large quantity through a material handling lift for repacking. It is stated that the material is combustible and the vapors caught fire and a spark caused fire and deaths.
As per the reports from various news papers, it appears that the material is combustible, volatile (vapour release), improperly packed, taken in large quantities, persons are inside a material handling lift, ignition source (spark) is present and trapped persons were unable to escape. 

What can be done to prevent such accidents in our workplace?

1. Lesser the better: Use small quantities for movement as the material is combustible.
2. Packing and sealing: Pack the material in containers with inert or other gas (if it can be used without   affecting product quality) and seal properly.
3. Containers: Use anti-static containers.
4. Design: Provide flameproof fittings in the lift and other areas where flammable material are handled/stored.
5. Size the lift: Use material handling lifts (box type) like those used in restaurants/eateries where kitchen and customer sitting place are at different floors. Or, if possible use bucket type transfer system.
6. Control: Do not permit movement of persons and (flammable/toxic) materials together in material handling lifts.
7. Training: Train the persons about hazards of the materials handled, procedure for material movement and precautions to be taken. Ask questions to ensure that they understood what you said.
8. Caution boards: Display warning signs on the containers, container handling equipment and lift entrance.
9. Alarm: Provide emergency switch in the lift.
10. Monitor: Provide CCTV camera in the lift to check for no movement of persons in the lift.
11. Supervision: Ensure supervision.
12. Drills: Conduct emergency exercises.