EHS Inspections at Seveso Sites: A Guide to Readiness

Every industrial site runs EHS inspections. Walk the floor, check the fire extinguishers, note the blocked exit, file the report. At a Seveso-classified site - a chemical plant, tank terminal, or any facility handling quantities of hazardous substances above the thresholds set by the EU Seveso III Directive - that same word, "inspection," covers a lot more ground.

This is a plain overview of what EHS inspections look like at a major-hazard establishment: the internal checks that feed your safety management system, the external audits regulators run on top of them, and what actually makes the two different from a general workplace walkthrough.

Two Kinds of Inspection, Two Different Audiences

At a Seveso site, "EHS inspection" usually means one of two things.

Internal inspections are run by your own EHS or HSE team, shift supervisors, or process safety engineers. They check that equipment, procedures, and controls are working the way your safety management system says they should. These happen on a schedule you set - daily, weekly, monthly, tied to specific installations or risk areas - and the findings feed directly into your VBS (veiligheidsbeheersysteem), the safety management system the Seveso Directive requires you to operate and document.

External inspections are run by the regulator. In the Netherlands, that's typically a joint effort between the environmental/omgevingsdienst authority (commonly DCMR for the Rijnmond region, or the relevant regional environmental service elsewhere) and the Nederlandse Arbeidsinspectie, sometimes alongside the fire service (veiligheidsregio). These are statutory inspections carried out under the Seveso framework - in the Netherlands implemented through the Besluit risico's zware ongevallen (Brzo) - and they check whether your VBS exists, is followed, and actually controls the major-accident risks you've identified.

The two are connected but not the same thing. Internal inspections are how you find and fix problems before they matter. External inspections are how the regulator confirms your internal system is doing that job.

What Makes This Different from a General Workplace Inspection

A standard workplace EHS inspection looks for things like blocked walkways, missing PPE, unlabeled chemicals, or expired fire equipment. Those checks still happen at a Seveso site - but they sit underneath a bigger question: are the controls that prevent a major accident actually working?

A few things follow from that:

Scope is tied to hazard identification, not just housekeeping. Inspections at a Seveso site trace back to the hazards documented in your safety report - things like loss-of-containment scenarios, ignition sources near flammable storage, or failure modes in safety-critical instrumentation. An inspection checklist that doesn't map back to those identified major-accident hazards is missing the point of Seveso inspection.
Safety-critical equipment gets specific, recurring attention. Relief valves, gas detection, emergency shutdown systems, bunding and containment - this equipment needs inspection and testing on a defined schedule, not an ad hoc walk-through. Missing or overdue checks on safety-critical equipment is one of the most common findings in external Seveso inspections.
Procedures are checked, not just assumed. It's not enough that a procedure exists on paper. Inspectors - internal or external - will ask whether operators actually follow it, whether it matches how the work is really done, and whether deviations get reported and reviewed.
Findings have to close the loop back into the VBS. A finding that gets logged but never tracked to resolution is a gap regulators specifically look for. Your management system needs a visible trail: finding raised, action assigned, action closed, verified.
Documentation carries more weight. External inspectors will ask to see inspection records, not just hear that inspections happen. If you can't produce the history - who inspected what, when, and what came of it - that's treated as a finding in itself.

What External Inspectors Are Actually Checking

DCMR and the Nederlandse Arbeidsinspectie aren't there to check if your fire extinguishers are in date. Brzo inspections typically look at:

Whether your safety report and VBS accurately reflect current operations - not the plant as it was when the safety report was last submitted.
Whether major-accident scenarios have been identified and whether the controls you've named for them are actually in place and maintained.
Whether staff involved in safety-critical roles have the training and competence the VBS says they should have.
Whether internal audits and inspections are actually happening on schedule, and whether their findings are acted on.
Whether incidents, near-misses, and internal inspection findings are being used to update risk assessments and procedures - not just filed.

In short: external inspectors are checking whether your internal inspection process is real and effective, not just present in a policy document.

Basic Inspection-Readiness Practices

You don't need a special program to be ready for a Seveso inspection - you need your everyday practice to hold up under scrutiny. A few basics matter most:

Keep internal inspections tied to your hazard register. Build inspection checklists from the major-accident scenarios in your safety report, not a generic template. If a hazard is documented, there should be a traceable inspection or check that covers it.

Track safety-critical equipment on its own schedule. Don't let inspection of relief systems, detection equipment, or emergency shutdowns get folded into a general maintenance round where it can be deprioritized or missed.

Close the loop on findings, visibly. Every inspection finding should have an owner, a deadline, and a closure record. If you can't show that trail during an external inspection, expect it to become a finding of its own.

Keep records accessible, not just archived. When DCMR or the Nederlandse Arbeidsinspectie asks for inspection history on a specific installation, the goal is to produce it in minutes, not days.

Treat internal inspections as inputs to the VBS, not a separate compliance exercise. The value of an internal inspection isn't the walkthrough itself - it's what gets updated afterward: a procedure, a risk assessment, a training requirement, a piece of equipment on a repair list.

The Takeaway

At a Seveso site, EHS inspections aren't a generic safety ritual - they're the mechanism that keeps your VBS honest. Internal inspections are how you catch and correct gaps in major-hazard controls before they become incidents. External inspections from DCMR and the Nederlandse Arbeidsinspectie are how the regulator checks that your internal process is doing that job for real, not just on paper. Getting the basics right - hazard-linked checklists, dedicated attention to safety-critical equipment, and a visible trail from finding to fix - is what inspection readiness actually looks like.