Contamination & Geotech Expo 2021 Programme

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black gold oil slick contamination expo

Demystifying the Four Hour Time-Weighted Average

23 Sep 2021
Hazardous materials
The HSE's latest push to improve asbestos personal monitoring is centred around the often dreaded Four Hour Time-Weighted Average. One of the biggest factors behind the 4hr TWA's unfavourable reputation is a widespread lack of understanding of why it's used and how it's calculated. In his talk, Nick Garland explains what the 4hr TWA test is for, demystifies the calculations, and shows how Assure360 can help.
Nick Garland, Founder - Assure 360
Assure 360