- Location
- Beams, ledges, services and high-level surfaces
- Identify
- Dust source and composition
- Assess
- Access, ignition and contamination risks
- Cleaning objective
- Recover deposits without dispersing them
Dust type and process source
Dust from packaging, food production, minerals or metal processing can present very different hazards. Its source and composition should be understood before collection equipment is chosen. Appearance alone does not show that a deposit is harmless or non-combustible.
Process information and existing assessments may identify the material. If the deposit remains unknown, further identification may be needed before it is disturbed. Dust on beams, ledges or services should not be treated as one material simply because it has accumulated at high level.
Controlled recovery above production areas
High-level cleaning has to protect production areas, stored goods, equipment and people below. Dislodging deposits from beams without controlled recovery can spread contamination rather than remove it.
Where combustible dust is present, the equipment and cleaning method have to fit the site’s fire and explosion assessment. HSE guidance for food dusts addresses deposit control and methods that avoid unnecessary dust dispersion. Other processes require an assessment of the material actually present.
Access and work at height
Access arrangements need to account for obstacles, overhead services and moving plant. Production equipment may need isolation or protection. Work at height must be properly assessed and organised by competent people.
Collected material also has to be contained and removed without being spread through the area. Any parts of the structure that cannot be reached should be stated clearly rather than treated as fully cleaned.
Recurring dust deposits
Repeated build-up may point to a process release, a gap in housekeeping or a problem with extraction. Removing the deposit does not correct the source, so recurring accumulation needs separate attention.