BOHS P403: Air Sampling and Fibre Counting (PCM) – South West England


The industry requirement for an asbestos analyst.

Make course enquiry>
SKU: N/A Categories: ,


The BOHS P403 course will provide you with the theoretical knowledge and practical ability to undertake air sampling in relation to asbestos and fibre counting to quantify respirable fibres using phase contrast microscopy (PCM).

Course Content

The course gives analysts the knowledge and skills required to safely take air samples, prepare fibre counting slides, and accurately analyse these slides under a microscope to identify airborne fibre levels within the building or site. 

Course Requirements

Candidates are expected to have an awareness of the contents of HSG 248 Asbestos: The Analysts’ Guide (2nd Edition, July 2021) for sampling, analysis and clearance procedures, and in particular Appendix 1 Fibres in air: sampling and evaluation of fibres by phase contrast microscopy. Prior experience of analysing fibre count samples is also required, and it may be beneficial to be participating in a quality control scheme.

Furthermore, candidates are also required to have previous training which covers the core competences outlined within the foundation materials detailed within Table A9.1 of HSG 248 Asbestos: The Analysts’ Guide (2nd Edition, July 2021). This can be achieved by in-house learning or through completing the P400 foundation module.

The syllabus comprises of five sections:

  • Air sampling equipment, sampling strategies and collection of samples
  • Sample preparation and setting up of microscope
  • Fibre counting and calculation of results
  • Certificates and reporting results
  • Quality control

Who is the course for?

  • Anyone who is required to undertake air sampling and fibre counting as part of their work
  • Those considering a career in asbestos analysis
  • Those responsible for managing asbestos analysts

How long is the course?

The course comprises of at least 18 hours of study time – 14 of which will be taught (teaching and practical assessments). The further 4 hours are to be completed as independent study in your own time. There are two practical assessments and one written examination which lasts 120 minutes.


A successful completion of parts A, B and C within 12 months will mean you are presented with a Proficiency Certificate in Air Sampling and Fibre Counting (PCM).


£500.00 per person (2 day course) + vat (exclusive of £235 BOHS Exam Fee)

BOHS logo

Additional information
Additional Information

Lunch and onsite parking are provided within the cost of this course

BOHS Exams

All BOHS exams are now online, so a laptop is required. If you do not have your own, please contact us in advance so that we can provide one for you.

Course Enquiry

Make an enquiry about this course