Air Sampling of Asbestos and MMMF and Requirements for a Certificate of Reoccupation Following Clearance of Asbestos P404

For asbestos removal and remediation projects, an independent asbestos analyst should be employed to conduct a thorough clearance inspection of the site. This is to check that control measures are effective, asbestos materials have been managed accordingly (removed / encapsulated / repaired), and method statements have been followed. There is also a legal requirement for asbestos analysts to undertake formal training in their role, as outlined in CAR 2012 Regulation 10, and HSG248: Asbestos: The Analysts’ Guide for Surveying, Sampling and Analysis. 

The P404 qualification is the industry standard for asbestos site analysts. It gives you the skills and knowledge required to thoroughly and safely undertake air monitoring and the four stages of the clearance process. It also teaches you how to identify any outstanding asbestos risk on the site, and how to issue a certificate for reoccupation when you are satisfied the site is safe to re-occupy.  

Who is it for?

The qualification is suitable for anyone who: 

  • Undertakes clearance inspections and air monitoring of asbestos as part of their work (e.g. asbestos site analyst) 
  • Issues clearance certificates following asbestos clearance procedures 
  • Undertakes asbestos fibre counting and requires an understanding of the external processes used in air sampling 
  • Manages asbestos site analysts 


The level of a qualification indicates the relative complexity and depth of knowledge and skills required to attain the qualification.  

This is a level 4 qualification in the BOHS qualifications framework, equivalent to NVQ Level 4 and HNC. 

How is it delivered?

The P404 course will generally run over two consecutive days and include 11 hours of study time. This includes nine hours taught (teaching and formative practical assessment) and two hours of independent study (in your own time).  

The course can be delivered more flexibly, such as on one day per week for two weeks, but should still include 11 hours of study time 

Modules / Learning objectives

Overall Objective

To provide you with all the necessary theoretical and practical knowledge in the techniques of air sampling and clearance testing, and the provisions for issuing certificates for reoccupation following removal or remediation works involving asbestos products. 


  1. Health effects and regulations 
  2. Method Statement/Plan of Work 
  3. Air sampling for asbestos 
  4. Enclosures, clearance air monitoring and reporting 
  5. Practical work 


You must pass three parts within 12 months: 

  • Formative practical assessment 
  • Written theory examination
  • Written practical examination 


BOHS provides: 

  • A comprehensive Student Manual, which covers the full range of subject areas included in the qualification 
  • A support pack for tutors which provides sample examination questions and guidance on the written examinations 

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