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Home , Chemical hazard, Occupational hygiene, Risk assessment

Occupational : Evaluation of

Chemical - Part 1 Frances Wright

Module OSH10020 Learning Outcomes – Evaluation Having completed all of the learning activities associated with this lecture, you should be able to: of Chemical Health Risks – Part 1  Explain the categories of health , and describe the types of work activity associated with common chemical hazards  Describe the routes of entry for chemicals to the body  Describe how hygienists monitor the work Frances Wright environment for dusts, gases and vapours Occupational Hygienist  Define occupational exposure limits and discuss the Wright Environmental Services implications for human health.

Occupational Hygiene: Evaluation of Chemical Health Risks What is Occupational Hygiene? The International Occupational Hygiene Part 1 Association (IOHA) defines Occupational Chemical – Assessment Hygiene as: 'The discipline of anticipating , recognising , Part 2 evaluating and controlling health hazards in Physical Forms and Processes the working environment with the objective of protecting worker health and well-being..'

What is Occupational Hygiene? Health Hazards

Gases, vapours, solids, fibres, liquids, dusts, Chemical agents mists, fumes, etc. Noise and vibration Physical agents Heat and cold Electromagnetic fields, lighting, etc.

Biological agents Bacteria, fungi, etc.

Ergonomic factors Lifting, stretching, and repetitive motion

1 Occupational Hygiene: Evaluation of

Chemical Health Risks - Part 1 Frances Wright

Chemical Agents Vs Risk  Hazard is the Chemical  Risk is the potential to do harm

Identify the  Identify chemicals Identify the – Talk to procurement, managers, employees Chemical Hazards – Examine processes – Chemicals Produced during process Document, CHEMICAL Identify Processes • (e.g fume) Communicate & RISK & Workers ASSESSMENT Review

Control the Risk Evaluate the Risk

Identify the Chemical Hazard Identify Processes and Workers  Gather hazard information  Examine production process – Material Data Sheet  Who might be exposed – Chemical label  Non-production handling – (eg. waste, quality, maintenance, spillages)

2 Occupational Hygiene: Evaluation of

Chemical Health Risks - Part 1 Frances Wright

Evaluate the Risk Evaluate the Risk  of chemical  Measure worker exposure  Quantity used  zone  Frequency of exposure  Methods – MDHS (UK), NIOSH, OSHA  Number of people exposed

Personal Sampling Pump Measurement tools

Measurement tools Filter holders for

3 Occupational Hygiene: Evaluation of

Chemical Health Risks - Part 1 Frances Wright

Solid Sorbent Tubes for Draegar pump for stain indicator tubes Measuring Gases and Vapours

Direct Reading - Continuous Long Term Sampling Dust Monitor

Short Term Sampling Grab Sampling

4 Occupational Hygiene: Evaluation of

Chemical Health Risks - Part 1 Frances Wright

Continuous Monitoring Evaluate the Risk  Occupational Exposure Limit Values – Occupational Exposure Limit Values (8 Hours) – Short Term Exposure Limits (15 minute)

Evaluate the Risk Hierarchy of Control  Elimination EXAMPLE: Total Inhalable Dust 8 Hour OELV = 10 mg/m 3  Substitution

CONCENTRATION = ANALYTICAL RESULT ÷ VOLUME  Process Changes

Analytical results (dust on filter) 0.05 mg  Airvolume sampled 0.48 m 3  Automation 3 in air 0.05/0.48 = 0.1mg/m  Containment Sampling time 4 Hours  Local Exhaust Ventilation Concentration over 8 Hours 0.1*(4/8) = 0.05 mg/m 3  General Area Ventilation Compare the concentration (over 8 hours) to the 8 Hour OELV  0.05 mg/m 3 is well below 10mg/m 3  Respiratory Protective Equipment

Document, Communicate and Review Summary Occupational Hygiene

Identify the Chemical Hazards

Document, Identify Processes Communicate & CHEMICAL & Workers Review

Control the Risk Evaluate the Risk

5 Occupational Hygiene: Evaluation of

Chemical Health Risks - Part 1 Frances Wright

Occupational Hygiene: Evaluation of Chemical Health Risks

Part 1 Chemical – Risk Assessment

Part 2 Physical Forms and Processes

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