P603 – Control of Hazardous Substances
BOHS Level 4 Qualification
P603 is an advanced programme focused on the principles and practical application of Controlling Hazardous Substances in the Workplace.
The qualification develops the knowledge required to assess exposure risks and determine appropriate control strategies, with particular reference to Local Exhaust Ventilation (LEV) as a primary engineering control.
Who Should Attend
This course is suitable for:
- LEV practitioners seeking a deeper understanding of exposure control principles
- Engineers and technicians progressing through the BOHS Level 4 LEV pathway
- Health & Safety professionals responsible for CoSHH compliance
- Those involved in specifying or evaluating control measures for hazardous substances
Course Overview
The programme provides structured coverage of:
- The health effects of hazardous substances
- Routes of exposure and risk factors
- Workplace Exposure Limits (WELs) and regulatory context
- The Hierarchy of Control measures
- The role of LEV within an integrated control strategy
P603 forms part of the BOHS Level 4 Certificate pathway in Local Exhaust Ventilation and strengthens the theoretical foundation underpinning effective system design and performance evaluation.
What You Will Learn
By the end of the course, delegates will understand:
- How hazardous substances cause harm and the factors influencing risk
- The principles of exposure assessment
- The importance of inhalation, dermal and ingestion pathways
- The legal duties under CoSHH Regulations
- How to determine appropriate control strategies based on risk
- How LEV integrates with other engineering and administrative controls
Application to LEV Practice
P603 provides critical context for those working with LEV systems by reinforcing why effective control is necessary, not merely how it is achieved.
The qualification supports informed decision-making when designing, testing or evaluating LEV systems in real workplace environments.
Important Note on Competency
P603 develops theoretical understanding of hazardous substance control principles.
Competence in workplace exposure assessment or control implementation requires appropriate practical experience in addition to formal qualification.
Assessment
The qualification assessment consists of a BOHS-set written examination.
- Structured technical questions
- Applied understanding of risk and control
- Regulatory interpretation and practical reasoning
Successful candidates are awarded the BOHS P603 Certificate.
Delivery Formats
- Live interactive webinar (Zoom)
- Face-to-face training (typically Hilton East Midlands, J24 M1)
- Available for in-house delivery by arrangement
Fees
£1265 + VAT
BOHS examination fee: £195 + VAT (reviewed annually by BOHS)
Invoices are issued approximately 5–6 weeks prior to the course start date.
Progression
P603 forms part of the BOHS Level 4 LEV qualification framework.
Delegates typically progress to:
P604 – Performance Evaluation of LEV Systems
Completion of P601–P604 contributes toward the BOHS Level 4 Certificate pathway in LEV.
Professional Recognition
The P603 qualification supports progression toward professional membership of BOHS and the Society of Operations Engineers (SOE). It strengthens the practitioner’s ability to apply control principles within regulatory and industrial contexts.
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