A worker in Queensland was seriously injured in an explosion last month in Townsville.
Early investigations indicate it may have involved an explosive gas or substance in the pump room, but the ignition source has not been confirmed.
The worker received extensive burns which required immediate hospital treatment.
A spokesperson for Workplace Health and Safety in Queensland said investigations are continuing.
"Explosions can have catastrophic consequences, causing serious injuries or death, as well as significant damage to property," the spokesperson said.
"This is why a person conducting a business or undertaking (PCBU) must prevent the possibility of fire or explosion from the ignition of flammable substances in areas which can have a hazardous atmosphere."
In the last five years, Workplace Health and Safety Queensland has issued 74 improvement and 34 prohibition notices in relation to an explosion or controlling the risk of an explosion.
In the same period, there have been 199 workers' compensation claims made for incidents involving workers receiving burns from flammable liquids or gas across all industries.
There are a range of control measures to manage these risks including: identifying hazardous areas in accordance with AS/NZS 60079.10.1 (hazardous areas are those areas of potential fire or explosion risk due to the presence of flammable gas, vapour or mist in sufficient quantities); having equipment and processes available to detect leaks of flammable gases or vapours and enable response actions to be taken; and ensuring incompatible materials (e.g. oxidisers) are isolated from hazardous areas, just to name a few.