7.3 Occupational Exposure Limits

Question 1

The maximum concentration of an airborne substance averaged over a reference period (referred to as a time-weighted average - TWA) to which employees may be exposed by inhalation is known as what under COSHH?

Answer 1

Workplace Exposure Limit (WEL)

Question 2

How long are the short-term exposure limits (STELs) or long-term exposure limits (LTELs) reference periods?

Answer 2

STEL - 15 minsLTEL - 8 hours