combustible dust housekeeping inspection records DSEAR

Direct answer. Where a process makes or handles combustible dust, housekeeping is part of preventing a dangerous build-up and reducing the fuel available for a fire or secondary explosion. Under DSEAR, employers must assess and control fire and explosion risks from dangerous substances; HSE specifically identifies dust as a potential explosive atmosphere and good housekeeping as a control. A defensible routine identifies where dust settles, how it will be removed without raising a new hazardous cloud, who checks it, what finding stops or changes work, and how defects are closed. The inspection record is evidence of the control working, not a substitute for extraction, containment, ignition control or a competent assessment. HSE on dangerous substances; HSE DSEAR in detail.

This Great Britain guide covers the housekeeping and evidence task, not technical explosion-pressure calculations, hazardous-area zoning or a complete DSEAR assessment. The existing DSEAR overview owns the broad law. If dust also harms health, COSHH separately requires exposure assessment and adequate control. Formal LEV examination and test records are a separate duty; do not use a cleaning log as proof that extraction performs adequately.

First decide whether the dust can be dangerous

Familiar materials can become hazardous when finely divided and dispersed. HSE's combustible-dust guidance names examples including sugar, coal, wood, grain, some metals and synthetic organic chemicals. The precise risk depends on the material, particle characteristics, quantity, process, dispersion, confinement and potential ignition sources. Do not assume a material is safe because its solid bulk form does not ignite readily, or that every visible dust layer presents the same explosion risk. Obtain appropriate substance and process information and competent advice where the hazard is uncertain. HSE HSG103; HSE ATEX and explosive atmospheres.

The assessment should examine both normal production and abnormal states: a blocked filter, leaking duct, bag change, spill, breakdown, maintenance opening or hurried cleanup. Look beyond the immediate machine. Dust can settle on cable trays, beams, lights and ledges and later be disturbed. A small primary event can disperse accumulated dust elsewhere; this is one reason a tidy floor alone is an incomplete inspection. HSE's older but still hosted HSG103 is a technical reference; use current site-specific professional judgement for control design.

Prevent the build-up before scheduling cleanup

Prioritise source control: keep material contained, maintain extraction and transfer systems, fix leaks, reduce releases and manage waste. Then define how residual deposits are found and removed. HSE's port guidance lists good housekeeping, maintained local exhaust ventilation, ignition-source control and hot-work permits as possible explosion-risk controls for dusty cargoes. The exact measures vary by industry and assessment. HSE dusty cargoes.

An inspection sheet that repeatedly records the same deposit but never fixes a failed seal or poor extraction demonstrates a broken control. Use the trend to investigate why the dust is escaping. If a build-up appears suddenly, consider whether the process should continue while the source, ignition controls and cleanup method are assessed.

Build an inspection route around real accumulation points

A usable inspection route identifies equipment, surfaces and access constraints. It may include transfer points, extraction hoods and ducts, filters and collectors, conveyor undersides, overhead ledges, electrical enclosures, plant rooms, maintenance stores and waste handling. The competent assessor should decide which surfaces matter for the material and process. Some high-level locations need planned access and specialist cleaning; a checklist cannot justify unsafe work at height or entry into a hazardous atmosphere.

For each location, set an observable standard from the risk assessment. Avoid a vague “clean enough” tick. Document what unacceptable accumulation looks like, when a task must stop or a supervisor must be called, and whether temporary controls are allowed pending repair. Do not copy an arbitrary universal dust-layer thickness or cleaning interval into every site: those decisions require material and process evidence.

Decide inspection frequency by release rate, activity, previous defects, access and consequence. A change in production rate, material or extraction performance may require more frequent checks. Where housekeeping is a critical control, arrange independent checks or supervisory review rather than relying only on the person who performed the cleaning.

Choose a cleaning method that does not create the event

The cleaning method itself can disperse dust, expose workers to harmful particles or introduce ignition sources. The risk assessment must consider how deposits are collected, the suitability of equipment for the substance and area, static electricity, the availability of extraction or wet methods where appropriate, and how waste is contained. Do not tell staff to use compressed air or an ordinary vacuum as a default: blowing can create a dust cloud and equipment may be unsuitable for a hazardous area. A competent person should select and approve the method.

Where a task also creates inhalation risk, apply the relevant COSHH controls and any respiratory protection requirements. Good housekeeping can protect both against health exposure and process fire, but one control objective does not prove the other has been met. HSE dust at work; HSE on dangerous substances.

For maintenance or hot work, inspect and clean affected locations first, then assess whether residues remain hidden in plant or voids. The permit issuer must consider the actual dust hazard and appropriate isolation and ignition controls. The mere presence of a signed hot-work permit does not show the area has been made safe.

What to record, and what to do with a failed check

A practical record can include the date and shift, area and equipment identifier, material/process, observations, cleaning performed, method used, name of checker, photographs where useful, unresolved deposits, immediate controls, responsible person, due date and verification of closure. Link a repeated finding to the plant fault or process change that causes it. Keep the evidence proportionate: a small site may use a short log, while complex process plant may need a formal defect and permit trail.

If an inspection finds a significant accumulation, do not mark it “actioned” merely because somebody has been told. Decide whether work can continue; protect people from ignition and exposure; arrange safe cleaning by competent people; investigate the source; and verify that the defect is closed. Where a competent assessor concludes the area has an explosive atmosphere or requires particular equipment, follow that determination. A supervisor should know when to escalate beyond routine cleaning.

An example: a woodworking shop's shift check finds dust on a high ledge and unusual deposits near a duct joint. The immediate response is to assess whether work can continue, prevent disturbance and ignition, and arrange safe removal. The durable fix is to inspect and repair the joint, then confirm extraction and housekeeping performance. Logging a photograph of the clean ledge alone would miss the source defect. HSE notes that wood dust is both a health hazard and, in some circumstances, a fire or explosion hazard. HSE wood-dust guidance.

Train, review and coordinate

Workers need to recognise the relevant dust hazard, report abnormal releases, know safe cleaning limits and understand when to stop. Contractors and temporary staff may be unfamiliar with high-level deposits, permit controls or equipment restrictions. Brief them before access to affected plant. The emergency plan should consider plausible fire or explosion scenarios and communicate warning and evacuation arrangements; P4-144 covers that distinct preparedness task.

Review the route and method after new material, changed production rate, an extraction defect, a fire, near miss, failed inspection or new evidence about the substance. Compare inspection findings with maintenance, LEV tests and incident reports. A steadily increasing cleanup burden may show that the primary containment control is degrading even if every individual log says “cleaned.”

Common mistakes

• Treating a tidy floor as proof that overhead and hidden deposits are controlled.
• Setting a generic weekly frequency or numerical dust threshold without site evidence.
• Blowing deposits into the air or using unsuitable cleaning equipment.
• Recording cleanup but never correcting the leak or extraction failure.
• Confusing a dust-explosion assessment with a COSHH inhalation assessment; both may be needed.
• Assuming a software tick or photo is a competent hazardous-area classification.

Complys and the next step

The existing DSEAR software page is the relevant commercial owner for organisations considering digital evidence workflows. Dedicated DSEAR records, inspection scheduling, permissions and commercial terms remain under the Next-100 Row 89 product-truth HOLD. This article does not claim Complys measures dust, classifies zones, selects cleaning equipment or approves work restart. Start by tracing one dust-generating process from release point to its highest and least visible deposit, then check whether the current assessment, cleaning method and defect record cover that path.

Primary sources

• HSE: DSEAR in detail
• HSE: About dangerous substances
• HSE: Safe handling of combustible dusts, HSG103
• HSE: ATEX and explosive atmospheres
• HSE: Dusty cargoes