Workplace Exposure Monitoring

Workplace exposure monitoring is the process of measuring employee exposure to hazardous substances within a working environment. It is a key component of occupational hygiene and enables organisations to determine whether workers are exposed to harmful levels of dust, fumes, vapours, gases or other airborne contaminants.

During workplace exposure monitoring, occupational hygienists collect air samples during normal working activities to measure contaminant concentrations. These results are then compared with Workplace Exposure Limits (WELs) to determine whether exposure levels are adequately controlled.

Monitoring supports compliance with workplace health and safety legislation and helps organisations implement effective measures to protect employee health.

Employers may need workplace exposure monitoring when they must verify exposure levels or demonstrate that control measures are effective.

Monitoring is typically required when:

• A COSHH Assessment identifies potential exposure risks
• hazardous substances have defined Workplace Exposure Limits
• new processes, chemicals or materials are introduced
• existing exposure control measures require verification
• employees report symptoms linked to workplace exposure
• organisations must demonstrate compliance with occupational hygiene regulations

Where monitoring identifies ventilation or environmental issues, further investigations such as a Local Exhaust Ventilation (LEV) Assessment or Indoor Air Quality Assessment may also be recommended.

AEC delivers structured industrial hygiene monitoring programmes designed to evaluate exposure risks and support workplace compliance.

Our workplace exposure monitoring services include:

• on-site workplace exposure assessments carried out by experienced occupational hygienists
• personal and area air monitoring to measure airborne contaminants
• monitoring of dust, fumes, vapours, gases and hazardous substances
• laboratory analysis of collected samples
• comparison of monitoring results with Workplace Exposure Limits
• detailed technical reports explaining exposure levels and potential risks
• practical recommendations to help organisations control workplace exposure

Where required, AEC can also deliver additional occupational hygiene services, including:

• COSHH Assessment
• Local Exhaust Ventilation (LEV) Assessment
• Indoor Air Quality Assessment
• Noise Monitoring
• Hand Arm Vibration (HAV) Assessment
• Lead in Paint Surveys
• Other Fibres

These integrated services enable organisations to manage workplace hazards effectively and maintain safe working environments.

AEC follows a structured occupational hygiene process to ensure accurate and reliable monitoring results.

• Initial Workplace Risk Assessment

Our occupational hygienists review workplace activities, materials and processes to identify potential exposure hazards.

• Monitoring Strategy Development

A monitoring strategy is designed to evaluate employee exposure during typical working conditions.

• Workplace Air Monitoring

Specialist equipment is used to collect air samples and measure airborne contaminants, including dust, fumes, vapours and gases.

• Laboratory Analysis

Collected samples are analysed using recognised analytical techniques to determine contaminant concentrations.

• Exposure Evaluation

Monitoring results are compared with Workplace Exposure Limits to determine whether exposure levels are adequately controlled.

• Reporting and Recommendations

AEC provides a comprehensive report outlining monitoring results and practical recommendations for improving workplace exposure control measures.

AEC carries out workplace exposure monitoring for a wide range of hazardous substances commonly present in industrial and commercial environments.

These include:

• respirable crystalline silica
• welding fumes
• wood dust
• isocyanates
• chromium VI
• volatile organic compounds (VOCs)
• solvent vapours and industrial gases
• oil mists and airborne particulates

Exposure to these contaminants can contribute to serious occupational illnesses, including respiratory disease, occupational asthma and cancer.

Where specialist contaminants are present, AEC also provides monitoring for Other Fibres.

AEC provides workplace exposure monitoring services across a wide range of industries where hazardous substances may be present.

Industries supported include:

• construction and demolition
• manufacturing and engineering
• automotive and aerospace
• oil and gas
• waste management and recycling
• laboratories and research environments
• food processing facilities
• education and training environments

Our occupational hygienists tailor monitoring programmes to suit each workplace environment and operational process.

The law requires employers to adequately control exposure to substances in the workplace that cause ill health. This is the Control of Substances Hazardous to Health Regulations 2002 (COSHH). In addition,  organisations need to work within the legal limits for the amount of substances that can be present in the workplace air.  There are also regulations for the control of: Noise , Vibration and Local Exhaust Ventilation. You can view a range of HSE guidance relating to Occupational Hygiene at   https://www.hse.gov.uk/pubns/books/index-legal-ref.htm

BOHS  is a membership organisation that promotes  Occupational Hygiene as the science-based discipline for identifying, assessing and controlling exposure to harmful substances in the workplace.  It is the only Occupational Hygiene organisation to be awarded a Royal Charter in recognition of its ‘ unique and pre-eminent role as the leading authority in occupational disease prevention’.  BOHS is also a UK based examining board for occupational hygiene qualifications