- Stored material
- Grain and grain residues
- Identify
- Crop, condition and treatment history
- Relevant hazards
- Grain dust and engulfment
- Separate work
- Cleaning, fumigation and mechanical repairs
Residual grain and storage condition
After discharge, grain and dust can remain around outlets and structural features in different conditions. The crop, storage period, moisture history and any deterioration help explain whether the residue is free-flowing, compacted or unstable.
Previous fumigation or other treatment also matters because the products used can affect both residue hazards and safe access.
Grain dust and unstable material
HSE guidance covers exposure to grain dust during storage and handling. The work should limit unnecessary dust dispersal and use controls suited to the material and workplace.
Retained grain can form unstable surfaces over voids or move suddenly. A surface that appears firm is not evidence that it can support a person, so work around retained grain must account for engulfment.
Cleaning and pest treatment
Removing residue is part of storage hygiene, but it is not fumigation and does not show that a pest problem has been resolved. Pest treatment has its own competence, product and safety requirements.
A restricted discharge may also involve the outlet or conveying equipment. Residue removal does not replace mechanical inspection or repair, and equipment involved in the work must be isolated as required.
Preparing the silo for refill
The required condition before refill depends on the next crop or product and the operator’s storage controls. It should be clear which areas were accessible, what residue or known defects remain and what inspection or hygiene checks are required before return to service.