Occupational Hygiene & Exposure Monitoring Services

A risk assessment is a qualitative process used to identify workplace hazards, evaluate exposure potential and determine where controls or further investigation may be required. Exposure monitoring is a quantitative process where occupational hygiene measurements are conducted to determine actual employee exposure levels and compare results to occupational exposure limits or applicable standards.

Occupational hygiene monitoring is required where workplace health hazards may expose employees to physical, chemical, biological or ergonomic risks. In terms of South African occupational health legislation, employers are required to conduct occupational hygiene assessments and exposure monitoring to evaluate workplace exposure risk and demonstrate compliance with applicable occupational exposure limits and health regulations.

Monitoring is commonly conducted as part of baseline risk assessments, following process or plant changes, after employee health complaints, or as part of legally required periodic exposure monitoring programmes. Occupational hygiene assessments are generally required to be reviewed and repeated at intervals not exceeding two years, unless otherwise indicated by the findings of the assessment or specific regulatory requirements.

Occupational hygiene assessments may evaluate physical, chemical, biological and ergonomic workplace hazards. These may include noise, illumination, thermal stress, airborne contaminants, hazardous chemical agents, indoor air quality concerns, microbiological hazards and ergonomic risk factors.

Quantitative exposure monitoring involves the measurement and analysis of workplace exposure levels using specialised occupational hygiene methodologies and calibrated instrumentation. Monitoring results are used to determine employee exposure risk, assess compliance with occupational exposure limits and support workplace health risk management.

A Similar Exposure Group (SEG) is a group of employees who are expected to have similar exposure profiles due to the nature of their work tasks, processes, materials used and workplace conditions. Occupational hygiene monitoring is often conducted based on SEGs to ensure representative exposure assessment and effective exposure management.

In terms of South African occupational health legislation, occupational hygiene assessments and exposure monitoring programmes are generally required to be reviewed and repeated at intervals not exceeding two years, unless otherwise indicated by the findings of the assessment, changes in workplace processes, employee health concerns or specific regulatory requirements.

More frequent monitoring may be required where occupational exposure limits are exceeded, where significant workplace changes occur, or where existing control measures are found to be ineffective.

Where occupational exposure limits are exceeded, further investigation is typically required to identify contributing exposure sources and evaluate existing controls. Recommendations may include engineering controls, ventilation improvements, administrative controls, process modifications, respiratory protection programmes, medical surveillance and follow-up exposure monitoring.

No. Occupational hygiene assessments may also be required in offices, healthcare facilities, laboratories, warehouses, commercial buildings and other workplaces where employees may be exposed to workplace health hazards such as indoor air quality concerns, ergonomics risks, biological hazards or chemical exposures.