Silica Dust: You Are More At Risk Than You May Think Its only dust - PowerPoint PPT Presentation

Jan 26, 2024 •145 likes •384 views

Health and Safety Health and Safety Executive Executive Silica Dust: You Are More At Risk Than You May Think Its only dust you know! What is the Problem? Why is it a Problem? Particles need to be respirable to cause harm

Health and Safety Health and Safety Executive Executive Silica Dust: You Are More At Risk Than You May Think
“It’s only dust you know!”
What is the Problem?
Why is it a Problem? • Particles need to be “respirable” to cause harm • Issue is Respirable Crystalline Silica or RCS • RCS particles can penetrate to deep lung
Why is it a Problem? • A micron is one millionth of a meter. • Human hair varies between 40 to 100 µ m thick. • Respirable dust = 10 µ m or less
Small size means often invisible under Why is it a Problem? normal conditions
Why is it a Problem? Repeated Exposure to Silica cause serious health effects: • Lung disease & reduced lung function • Disease continues to develop when exposure has stopped • Silicosis • Can also cause lung cancer and COPD • Can cause death
Why is it a Problem? Statistics are imprecise: • 10 – 20 % of construction workers exposed ??? • Over 500 silica related deaths in 2004 – – Over 10 a week • Research suggests silica is the second most important cause of occupational lung cancer after asbestos
How Much is a Problem? COSHH sets WEL for dust: General Dust • 10 mg.m -3 (inhalable) • 4 mg.m -3 (respirable) Respirable Silica • 0.1 mg.m -3 (8-hour TWA)
How Much is a Problem?
How Much is a Problem? 15 min SLAB CUTTING (40% silica) in open air, no control • Diamond blade = RCS exposure of 1.6 mg/m 3 • Resin blade = RCS exposure of 4.8 mg/m 3
• Can exposure be reduced? Control Solutions
Control Solutions Water Suppression
Control Solutions Water Sources
Control Solutions Water Suppression has other advantages: • Extends the life of expensive diamond blades • H elps prevent build up of dust in the machine workings
Control Solutions Issues associated with water suppression use: • Marking the cut line • Slurry generation • Wet legs
Control Solutions On-Tool LEV is also an option.
What about RPE Disposable (FFP3) Orinasal Half Mask PF = 20
Be worn correctly What about RPE Must fit correctly
PF = 20 What about RPE Power Assisted
Significant Risks to your health No or Ineffective Controls = Enforcement
Any Questions? Thank You

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