M501 – Measurement of Hazardous Substances
BOHS Advanced Module – Occupational Hygiene
M501 develops the advanced knowledge and practical competence required to design, undertake, interpret, and present occupational exposure measurements.
This intensive module focuses on atmospheric monitoring as a core component of health risk assessment under COSHH. It equips delegates with the technical understanding needed to apply sound sampling strategy, select appropriate equipment, interpret analytical results, and present defensible conclusions.
M501 is a key progression module for those developing professional competence in Occupational Hygiene and exposure assessment.
Who Should Attend
- Occupational hygienists in training
- Professionals progressing toward the Certificate in Occupational Hygiene (CertOH)
- LEV specialists as part of a patghway for expanding into exposure monitoring
- Health & Safety professionals with responsibility for air sampling programmes
- Specialists seeking deeper competence in atmospheric measurement strategy
Course Duration
5 Days (including examination)
Delivered via Live Interactive Webinar or Face-to-Face training.
Course Overview
The programme provides in-depth coverage of:
- Structured COSHH risk assessment principles
- Sampling strategy design and statistical considerations
- Air sampling theory and methodology
- Selection and use of sampling equipment
- Analytical techniques and laboratory considerations
- Hygiene standards and exposure limits
- Biological monitoring principles
- Calculation, interpretation and presentation of results
Numerical exercises are integrated throughout the course to ensure delegates understand the scientific principles underpinning exposure assessment.
Learning Outcomes
By the end of the course, delegates will be able to:
- Develop and justify appropriate exposure monitoring strategies
- Select suitable sampling techniques for specific contaminants
- Interpret analytical data in relation to Workplace Exposure Limits
- Present exposure data clearly and defensibly for management decision-making
- Apply occupational hygiene principles of Anticipation, Recognition, Evaluation and Control
Assessment
The assessment comprises:
- Practical assessment conducted during the course
- Written examination (Open Book)
- 40 Short Answer Questions
- Duration: 2 hours
- Pass mark: 50%
The module requires structured evening self-study and revision to consolidate learning.
Professional Progression
M501 is one of the core modules within the BOHS M500 series and forms part of the most common pathway toward the:
Certificate in Occupational Hygiene (CertOH)
Successful candidates progressing through the CertOH pathway may use the post-nominal letters CertOH.
M501 is also highly relevant for LEV professionals seeking to broaden their competence beyond system testing into exposure monitoring and risk-based evaluation.
Pre-Requisites
There are no formal academic pre-requisites. However, delegates are expected to have a working knowledge of COSHH requirements and basic occupational hygiene principles.
Fees
£1895 + VAT
BOHS examination fee: £165 + VAT (reviewed annually by BOHS)
Invoices are issued approximately 5–6 weeks prior to the course start date.
Success with OXYL8
OXYL8 delivers BOHS Occupational Hygiene modules with a clear focus on professional competence — not simply examination preparation.
Our programmes are led by experienced practitioners with extensive industry, regulatory and technical expertise. We combine structured academic delivery with practical interpretation, ensuring delegates understand how to apply knowledge confidently within real workplace environments.
Delegates receive comprehensive course materials, structured revision guidance, and ongoing tutor support throughout the programme.
Optional one-to-one mentoring sessions are available following the course, providing additional support for revision, professional development planning, and progression toward CertOH or CoC pathways.
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