Quick answer
Control airborne food-allergen transfer by identifying dust, powder, spray and spill routes that could carry allergenic material into other food. Assess the actual ingredients, handling, layout and cleaning, including where particles settle. This food-control assessment is separate from the workplace-health assessment of staff inhalation exposure.
Identify when material becomes airborne
Opening sacks, tipping flour, grinding nuts, using fine powders or cleaning dry residues can spread material beyond the immediate work surface. The relevant question is whether allergenic material can reach other ingredients, equipment or finished food.
CookSafe’s allergen house rules identify flour dust and splashes as possible transfer routes. A room appearing tidy after work does not establish that nearby uncovered food or equipment was protected during the task.
Map the task, movement and settling
| Area | Question |
|---|---|
| Ingredient and form | Which allergenic material can become dust, droplets or fine particles? |
| Handling task | When is it tipped, mixed, ground, sprayed or disturbed? |
| Nearby food | What is open, exposed or stored in a way that permits entry? |
| Air and movement | Could ventilation, doors, people or cleaning distribute it? |
| Settled residues | Where can material remain and later transfer through handling? |
Do not invent a universal safe distance or waiting time. Particle spread, equipment and activity vary. Where a claim or process depends on containment, obtain competent technical assessment.
Reduce spread and protect exposed food
Consider suitable separation of dust-generating tasks, controlled handling, closed ingredient containers and protection of other food. Assess equipment and ventilation with competent people, rather than improvising extraction that moves contamination elsewhere.
Cleaning methods must not simply redistribute the residues. Check the suitability of dry or wet methods, tools and equipment instructions for the actual material and area. Staff need an escalation route when a spill or dusty task occurs outside the approved arrangement.
Work through a handling example
Illustrative example: flour is tipped into a mixer beside an area used for a claimed gluten-free product. The recipe for the second product does not answer the airborne-transfer question. Assess task timing, physical separation, ingredient protection, equipment and cleaning before relying on the claim.
FSA precautionary guidance puts prevention and risk assessment before a residual-risk warning. Adding “may contain” cannot replace an achievable control improvement or repair a contradictory absence claim.
Separate food protection from worker health
Staff inhalation exposure can raise a workplace-health issue requiring a separate competent COSHH assessment and appropriate controls. This guide does not diagnose occupational asthma or prescribe respiratory protection. Use relevant HSE/HSENI advice and qualified support for that assessment.
Food-control and worker-health measures should be coordinated, but success in one does not automatically prove the other. Review after new powders, equipment, layout or cleaning methods. Check actual practice and retained residues, not only whether the procedure contains the word “segregation”.
Next steps
- Identify dust, droplet and settling routes into food and equipment.
- Assess the task, layout and food exposed during it.
- Use suitable prevention, protection and cleaning controls.
- Review actual effectiveness and coordinate separate worker-health assessment.
Read the official practical guidance — Use the current source alongside the procedures for your own business.