Primary keyword: silica dust monitoring report
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Meta title: What Should a Silica Dust Monitoring Report Include? | OccHygiene
Meta description: A compliant silica monitoring report must meet WHS Chapter 8A requirements. Learn exactly what your report needs to include, and what to do with the results.
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Introduction
After the silica monitoring process is completed and laboratory results are returned, the monitoring report is the document that ties everything together. It is the record your WHS file depends on, the evidence your regulator may request, and the tool your team uses to decide what controls need to change.
But not all monitoring reports are equal. A report that simply lists numbers without context, interpretation, or recommendations is unlikely to satisfy a regulatory audit — and it leaves you without the practical guidance you need. This guide explains what a complete, compliant silica monitoring report must contain.
Why the Report Matters
Under WHS Chapter 8A, air monitoring records must be kept for 30 years (Regulation 426K). Health monitoring records carry a longer retention period of 40 years (Regulation 426Q). This is not a technicality — it reflects the reality that silicosis can develop and be diagnosed decades after the original exposure. A complete record protects workers seeking health surveillance, supports workers’ compensation claims, and demonstrates due diligence if your business is ever investigated by a WHS regulator.
A monitoring report serves three distinct purposes:
- Compliance evidence — Documents that monitoring was conducted, by whom, using what methods, and what the results were
- Action guide — Tells the PCBU what (if anything) needs to change
- Health surveillance input — Provides the occupational physician with quantified exposure data for each worker under surveillance
The Essential Components of a Compliant Report
1. Client and Site Information
- Company or PCBU name
- Site name and address
- Site contact name and role
- Date(s) of monitoring visit
- Date the report was issued
2. Occupational Hygienist Credentials
- Name of the occupational hygienist who conducted the monitoring
- Professional qualifications and/or registration (AIOH membership, COH status)
- Name of the consulting firm
3. Purpose and Scope
A brief narrative explaining why monitoring was conducted (e.g., initial compliance assessment under Chapter 8A, follow-up after prior exceedance, post-control verification) and which workers and tasks were in scope.
4. Work Process Description
For each sampled worker, a description of:
– The job role and tasks performed during sampling
– The materials worked with (trade name and relevant silica content, from SDS if available)
– The tools used and any controls in place (wet cutting, vacuum extraction, RPE)
– Duration of high-exposure tasks versus total shift duration
This contextual information is critical — it allows the results to be correctly interpreted and compared if re-monitoring occurs with different conditions in future.
5. Sampling Methodology
- Equipment used (pump make/model, cyclone pre-separator type and size). For a full explanation of the sampling methods used to collect the data, see our methods guide.
- Flow rate and calibration records (pre- and post-sample)
- Total air volume sampled
- Sampling period (start and end times, total duration)
- Filter type and handling
6. Laboratory Information
- Name and NATA accreditation number of the laboratory
- Analytical method used (XRD, FTIR)
- Date samples received by laboratory and date of analysis
- Detection limits and any caveats
7. Results Table
The core of the report — a clear, readable table presenting:
| Worker | Role | Sampling Duration | RCS mg/m³ | % of WES | Classification |
|---|---|---|---|---|---|
| Worker A | Concrete cutter | 7.5 hrs | 0.031 | 62% | Elevated |
| Worker B | Labourer | 7.5 hrs | 0.008 | 16% | Acceptable |
For a plain-English explanation of how the WES is calculated and what it means, see our exposure standard guide.
For each result, the report should state whether it is:
– Below 50% WES — Acceptable, no immediate control action required
– 50–100% WES — Elevated, review controls, re-monitor within 3–6 months
– Above WES — Exceedance — immediate action required, notify regulator within 14 days
8. Interpretation and Discussion
This is where the numbers become actionable. A good report doesn’t just present results — it explains what they mean in the context of the work observed. For example: “Worker A’s result of 62% of WES was observed during a shift that included approximately 2 hours of dry angle grinding on sandstone paving. The absence of water suppression or on-tool extraction during this task is the likely primary driver of exposure.”
9. Control Recommendations
For any result above 50% WES (and ideally for all results, to document the control hierarchy assessment), the report should include specific, ranked control recommendations:
- Elimination/substitution — e.g., “Consider replacing dry-cut sandstone pavers with pre-cut panels delivered to site”
- Engineering controls — e.g., “Fit water suppression attachment to angle grinder for all paving cut operations”
- Administrative controls — e.g., “Rotate workers to limit any individual’s daily grinding time to 90 minutes”
- PPE — e.g., “If engineering controls cannot reduce exposure below WES, supplement with P2 half-face respirator (fit-tested)”
10. Re-Monitoring Recommendation
The report should state when and under what circumstances re-monitoring should be conducted — providing a clear re-monitoring schedule.
11. Record-Keeping Statement
A note confirming that air monitoring records must be retained for 30 years (Reg 426K) and health monitoring records for 40 years (Reg 426Q), and who is responsible for maintaining them.
What a Weak Report Looks Like
Watch out for reports that:
– List only the raw mg/m³ numbers with no context about the work tasks observed
– Fail to identify whether results represent an exceedance
– Provide no control recommendations
– Don’t identify the laboratory or confirm NATA accreditation
– Are missing worker/task descriptions so results cannot be contextualised in future audits
A compliant monitoring report should be readable by someone who was not on-site during monitoring — a regulator, a lawyer, or a treating physician — and still provide a complete picture.
OccHygiene Reports
Every OccHygiene monitoring report is prepared by a qualified occupational hygienist and includes all components listed above. Our reports are written to meet the requirements of WHS Chapter 8A and are suitable for regulatory audits, health surveillance programs, and principal contractor compliance requirements.
Request a monitoring quote → | Learn about our service →
Frequently Asked Questions
Can I use a monitoring report from another site for similar work?
No. Results from one site are specific to the conditions, equipment, materials, and workers at that site. Attempting to rely on another site’s report is not compliant with Chapter 8A and will not stand up to regulatory scrutiny.
Who should receive a copy of the monitoring report?
The PCBU (employer), the relevant workers (particularly those whose individual results are reported), and the occupational physician conducting health surveillance. In some jurisdictions, the regulator must be notified of exceedances — but the full report does not typically need to be proactively provided to the regulator unless requested.
What if I disagree with the laboratory result?
Sampling and analytical results can occasionally be queried if there are concerns about chain of custody, filter handling, or laboratory process. Reputable occupational hygiene firms use NATA-accredited laboratories precisely because accreditation provides quality assurance. If you have concerns, the hygienist can advise on whether a re-sample is warranted.
This article provides general guidance on silica monitoring report requirements under WHS Chapter 8A in Australia. For jurisdiction-specific advice, consult your state or territory WHS regulator.
