Effectiveness check

The effectiveness of the protective measures taken is to be checked, if necessary to be rectified and
the result to be documented.

1. Measurement of the concentration of hazardous substances in air at the workplace

• Welding work stations: Alveolar dust fraction relevant
• Mixed work stations: Respirable dust fraction relevant
• Cancer-causing compounds require separate calculation

2. Exposure data to be compared with occupational exposure limit values (local regulations)

• If exceeded: take further or appropriate protective measures and carry out hazard assessment again

3. Document the results

General dust limit value (ASGW), Germany

New occupational exposure limit for dust since 2014

• 1.25 mg/m³ Alveolar dust fraction relevant
• 10 mg/m³ Respirable dust fraction relevant

Occupational exposure limit values

The occupational exposure limit values that apply depend on the materials used

• Iron, aluminum, magnesium, titanium oxide
  - General dust limit value  as per local regulations
• Substances with particularly toxic properties
  - Substance-specific limit values as per local regulations
• Carcinogenic substances such as chromium-IV compounds or nickel oxides
  - Excluded or minimum use

This means:
When the occupational exposure limits are exceeded, at least one protective measure is ALWAYS required!

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