Occupational Hygiene Exposure Assessment Fundamentals Training Course

Course overview

Occupational hygiene decisions are only as reliable as the exposure information behind them. Safety professionals, HSE advisers and operational managers are often asked to determine whether workers are exposed to hazardous substances, noise, heat, dusts, vapours or other agents at levels requiring action. This requires more than arranging air monitoring: practitioners must identify exposure groups, select defensible sampling methods, interpret results against occupational exposure limits, and communicate findings that lead to proportionate controls.

This five-day Occupational Hygiene Exposure Assessment Fundamentals Training Course builds the practical assessment capability needed to plan, conduct and report workplace exposure assessments. Participants learn the anticipate-recognise-evaluate-control approach; hazardous-agent and task profiling; similar exposure group (SEG) development; personal and area sampling strategies; calibration and chain-of-custody requirements; time-weighted average and short-term exposure calculations; and basic statistical interpretation of monitoring data. The course applies EN 689 principles, NIOSH methods and exposure-limit comparison techniques to realistic workplace scenarios.

Instructor-led technical sessions are reinforced through sampling-plan workshops, calculation exercises, case-based interpretation of laboratory results and peer review of assessment decisions. Participants work with exposure registers, task observations, sampling records and reporting templates rather than abstract examples. By the end of the week, each participant produces a workplace-ready exposure assessment pack containing a hazard profile, SEG rationale, monitoring plan, results interpretation, control recommendations and review schedule that can be adapted for use in their own organisation.

The course is designed for professionals who already work with workplace hazards or health and safety management systems and now need a structured method for assessing employee exposure. It is especially valuable where organisations need stronger evidence for COSHH-style assessments, industrial hygiene programmes, contractor controls or occupational health surveillance decisions.

Course objectives

By the end of this course, participants will be able to:

• Construct a hazardous-agent inventory using process, task, material and worker-population information
• Define similar exposure groups using task observations, exposure determinants and work-pattern evidence
• Develop a personal and area sampling plan that specifies agents, workers, durations, locations and frequencies
• Select appropriate direct-reading instruments and laboratory analytical methods for common workplace contaminants
• Calculate time-weighted average, short-term and ceiling exposure values from sampling records
• Apply EN 689-style exposure comparison principles to determine the confidence and limitations of monitoring decisions
• Interpret laboratory reports, detection limits, uncertainty statements and occupational exposure limit comparisons
• Produce a documented exposure assessment report with control recommendations, monitoring priorities and review dates

Benefits of attending

Target competencies

Who should attend

• HSE Officers and Advisers — who need to plan and defend workplace exposure assessments
• Occupational Hygiene Technicians — who collect monitoring data and require a consistent interpretation method
• Safety Managers — who oversee chemical, dust, noise or physical-agent risk control programmes
• Occupational Health Practitioners — who need exposure evidence to inform health surveillance decisions
• Facilities and Operations Managers — who must prioritise controls for exposure-generating tasks and processes
• Environmental, Health and Safety Engineers — who design monitoring programmes for new processes, plant changes and contractors

Requirements and prerequisites

Participants should have practical familiarity with workplace risk assessment, common control measures and the basic language of health and safety management, such as hazards, likelihood, controls and occupational exposure limits. Experience of a manufacturing, construction, laboratory, maintenance, healthcare or process environment is useful because exercises use real task-based scenarios. Participants should be comfortable reading simple tables and performing basic arithmetic, including averages and unit conversions. No previous occupational hygiene qualification, laboratory experience, statistical software or air-sampling equipment ownership is required. Complete beginners should expect a technically focused foundation rather than an advanced analytical chemistry or occupational hygiene certification course.

Training methodology

The course combines instructor-led explanation with worked occupational hygiene cases drawn from maintenance, manufacturing, laboratory and process settings. Participants examine task descriptions, safety data sheets, process information and mock monitoring results to build exposure profiles and similar exposure groups. Hands-on sessions cover sampling-plan design, time-weighted average calculations, calibration-record checks and interpretation of laboratory reports. Small groups challenge each other's sampling rationale and control recommendations against EN 689 principles. The final day includes individual application planning, enabling each participant to translate the course templates into a priority assessment for their own workplace.

Course outline

Day 1: Occupational hygiene assessment principles

• The anticipate-recognise-evaluate-control occupational hygiene cycle
• Exposure routes and health effects of chemical and physical agents
• Occupational exposure limits, action levels and biological monitoring context
• Hazardous-agent inventories and exposure register structure
• Process mapping for exposure-generating activities
• Exposure determinants: source, pathway, worker behaviour and duration
• Control hierarchy and the role of monitoring in control verification

Workshop: Participants map a workshop process and produce an initial hazardous-agent inventory with priority exposure concerns.

Day 2: Exposure profiling and sampling strategy

• Task-based exposure profiles and worker activity observation
• Similar exposure group development and documentation
• Worst-case, representative and random sampling approaches
• Personal sampling versus area and source monitoring
• Sampling objectives for baseline, verification and change management
• Sample size, sampling frequency and work-shift coverage
• EN 689 exposure assessment decision framework

Workshop: Participants create a SEG register and monitoring strategy for a multi-task production department.

Day 3: Monitoring methods and field data quality

• Active air sampling pumps, filters, sorbent tubes and sampling trains
• Direct-reading instruments for gases, vapours, dust and noise
• NIOSH Manual of Analytical Methods selection principles
• Flow-rate calibration before and after sampling
• Sampling duration, flow rate and sampled-air-volume calculations
• Field blanks, chain of custody and laboratory submission records
• Instrument limitations, interferences and quality assurance checks

Workshop: Participants complete a sampling-record pack, including pump calibration, media selection and chain-of-custody documentation.

Day 4: Exposure data interpretation and decisions

• Time-weighted average exposure calculations
• Short-term exposure limit and ceiling-limit evaluations
• Unit conversion for ppm, mg/m3 and fibre concentrations
• Laboratory reporting limits, non-detects and result qualifiers
• Basic descriptive statistics for exposure datasets
• Exposure variability, uncertainty and outlier investigation
• Documenting compliance, uncertainty and further-monitoring decisions

Workshop: Participants analyse a set of laboratory results and produce an exposure-limit comparison table with justified conclusions.

Day 5: Controls, reporting and programme implementation

• Translating exposure findings into control recommendations
• Source control, local exhaust ventilation and enclosure options
• Respiratory protective equipment as an interim or supplementary control
• Control verification and post-control monitoring plans
• Exposure assessment report structure and evidence trail
• Review triggers: process change, incidents, workforce changes and new substances
• Integrating exposure assessments into ISO 45001 management systems

Workshop: Participants assemble and present a complete exposure assessment pack with recommendations, owners, review dates and monitoring priorities.

Tools & standards covered

EN 689:2018+AC:2019, ISO 45001:2018, NIOSH Manual of Analytical Methods (NMAM), Microsoft Excel

A typical training day

Live online deliveries follow the same structure in the East Africa Time zone, with shorter screen blocks and longer breaks.

What the fee includes

How you can take this course

Certification

Participants who complete the full five days receive the Skillset Development Certificate of Completion, stating the course title, course code, dates and delivery format — suitable for professional-development records and employer reimbursement.

Frequently asked questions