Workplace Exposure Limits (WELs) & EH40 Explained

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About Course

Workplace exposure limits (WELs) are the legal airborne limits for hazardous substances in Great Britain, published by HSE in EH40/2005. This course explains what WELs are, how 8-hour and 15-minute limits work, how to calculate a time-weighted average, and what the Sk, Sen and Carc notations mean in practice.

Tutwoo is an independent learning provider. This course is general awareness training written from published official guidance. It does not replace training required for your specific job, and it is not an accredited qualification.

What Will You Learn?

  • Explain what a WEL is and where the legal list is published Tell the difference between long-term (8-hour) and short-term (15-minute) limits Calculate a simple 8-hour time-weighted average Avoid the common mistake of treating a WEL as a "safe" line

Course Content

Course Lessons

  • What workplace exposure limits are
  • Long-term and short-term limits
  • Notations and extra duties
  • Using WELs in practice

Sources & Further Reading
The official guidance this course is based on.

Final Assessment

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