1 Occupational Hygiene – Control of Chemical Health Risks – Part 2 Frances Wright Occupational Hygiene – Control of Chemical Health Risks – Part 2 Frances Wright Occupational Hygienist Wright Environmental Services Module OSH10020 Part 1 Hierarchy of Control Part 2 Ventilation and Respiratory Protective Equipment Occupational Hygiene – Control of Chemical Health Risks Identify Processes & Workers Evaluate the Risk Control the Risk Document, Communicate & Review Identify the Chemical Hazards CHEMICAL RISK ASSESSMENT Hierarchy of Control Elimination Substitution Process changes Engineering controls Automation Containment Local Exhaust Ventilation General Area Ventilation Administrative controls Respiratory Protective Equipment Least Preferred Most preferred Dilution ventilation Local exhaust ventilation Dilution Ventilation • Dilutes concentration in the general area • USES: • Operator is removed from source • Low toxicity substances • Low level concentrations • Odours • Improve indoor air quality
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Occupational Hygiene Control Part2...3 Occupational Hygiene – Control of Chemical Health Risks – Part 2 Frances Wright A Typical LEV System Enclosing Capturing Receiving Source:
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Occupational Hygiene – Control of Chemical Health Risks – Part 2Frances Wright