Workplaces rarely remain the same for long. New materials arrive, production volumes increase, equipment is replaced and storage areas are reorganised. Each change can affect the way dangerous substances are handled and the likelihood of fire or explosion. This is why dsear should be considered as part of ongoing workplace risk management rather than treated as a one-off compliance exercise. A process that was adequately controlled when an assessment was completed may present different risks after machinery, ventilation, materials or working practices change.
Start With What Has Actually Changed
A review should begin with the workplace as it operates today, not with an older description of how it used to work.
Introducing a new cleaning solvent, moving flammable liquids to another storage area or increasing production can change the amount of dangerous material present. Even a change that appears small can affect ventilation, release points or the number of people potentially exposed.
Maintenance work can create another temporary risk. Equipment may be opened, hot work introduced or normal extraction switched off while servicing takes place. These conditions may not exist during routine production but still need to be considered.
Dangerous Substances Take Different Forms
DSEAR is not limited to drums of flammable liquid. Dangerous substances can include gases, vapours and combustible dusts capable of creating fire or explosion hazards.
HSE explains that DSEAR requires employers to assess and control risks from dangerous substances in the workplace. It also covers situations where explosive atmospheres may form.
This matters in industries such as food manufacturing, woodworking and chemical processing because fine dust or vapour can behave very differently from a solid material sitting safely in storage.
A Specialist Assessment Goes Beyond a General Checklist
A dsear assessment should examine how dangerous substances are stored, transferred and used, along with possible release points and ignition sources.
Safety First Group’s assessment process includes site evaluation, hazard identification, risk analysis and recommendations for controlling fire and explosion risks. Hazardous-area classification may also be relevant where an explosive atmosphere could form.
The aim is not simply to identify that a flammable substance exists. The assessment needs to consider whether the way it is handled creates a credible route to a dangerous event.
Ignition Sources Need to Match the Real Workplace
An explosive atmosphere becomes much more dangerous when there is something capable of igniting it. Potential ignition sources can include hot surfaces, electrical equipment, sparks, static electricity or hot work such as grinding and welding. The appropriate controls depend on the substance and the environment.
This is particularly important when contractors are carrying out temporary work. A maintenance team may introduce tools or working methods that are not normally present in the area.
Storage Changes Can Create New Problems
Moving dangerous materials is not purely a logistical decision. A new storage area may have different ventilation, separation distances or access arrangements. The quantity stored may also increase gradually without anyone reviewing whether the original controls remain suitable.
Good change management should therefore include health and safety implications before a new layout becomes permanent. It is easier to resolve a storage or ventilation problem during planning than after materials and equipment have already been moved.
Recommendations Need Clear Ownership
A technically strong assessment has limited value if recommendations remain open indefinitely. Actions should identify what needs to change, who is responsible and which items deserve priority. Some measures may involve engineering changes, while others could require revised procedures, training or better control of temporary activities.
Managers also need a way to check that completed actions actually solved the problem. Closing a recommendation on a spreadsheet is not enough if the underlying risk remains.
Training Should Reflect the Hazard
Employees and contractors need enough information to understand the risks relevant to their work. A general induction may not be sufficient for people working around flammable substances or classified hazardous areas.
Safety First Group’s recent guidance also stresses the importance of competence during maintenance and shutdown periods, when unusual tasks and changing site conditions can increase fire and explosion risks.
Training should therefore connect directly to the substances, equipment and activities people will encounter.
Review After Incidents and Near Misses
A near miss can reveal that a control is weaker than expected. Unexpected vapour release, repeated leaks, dust accumulation or an ignition incident should trigger a closer look at the existing assessment. The same applies when employees raise concerns about a process or when new information becomes available about a substance.
An assessment should evolve with the workplace rather than remaining unchanged simply because no major accident has occurred.
Conclusion
DSEAR management works best when it follows the real workplace. Changes to substances, equipment, storage, maintenance or production can all affect fire and explosion risk, even when the original assessment was suitable.
Regular review helps ensure that controls continue to reflect current conditions rather than outdated assumptions. safetyfirstgroup.co.uk provides specialist DSEAR assessment and wider compliance support, helping organisations identify dangerous-substance risks and translate assessment findings into practical workplace controls.
