Frequently Asked Questions

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LEVs are Local Exhaust Ventilation systems, pieces of equipment that take dusts, mists, gases, vapour or fumes (hazardous materials) out of the air so they can’t be breathed in and cause harm. Properly designed LEVs will: 

  • Collect the air that contains the hazardous material,
  • Make sure the hazardous materials in the air are contained and taken away from people,
  • Clean the air if necessary and get rid of any hazardous material safely.


A suite of documents which sit alongside the University Health and Safety Policy and provide detailed information on what you need to do to meet both legal and University requirements for different health and safety topics (e.g. fire safety, biological substances, fieldwork etc). 

Standard – specifies what the University expects to be in place for LEVs. Each bulletpoint is a ‘must happen’ and everyone needs to play their part in ensuring these requirements are met. Heads of School/ Service will set up systems and appoint staff into specific roles to make sure they happen; everyone else needs to carry out tasks and instructions to fulfil them.

Training Matrix – In order to support people and ensure that they are provided with the key training and health and safety competency to fulfils their roles, most Standards (including this one) list a connected Training Matrix which identifies the minimum training / level of competency required for that topic. As this matrix forms part of the Standard it must be achieved.

Head of School/Service Guidance – provides one way of implementing a system that will achieve the requirements of the Standard.  The HoSS (with your Health and Safety Manager) will decide if this (or another system) suits the needs of each school/ service most effectively.  So long as the Standard is achieved there is usually flexibility in the way that it can be achieved. However there are occasions where a more prescriptive approach is required and these are detailed in the Standard in the form of a Procedure or Tables; as they are listed in the Standard, they are also a ‘must happen’.  For this protocol on LEVs, the Table of responsibilities must be followed.

Table of responsibilities – this identifies who is responsible for key actions in the management of LEVs at the University. As it is listed in the Standard it must happen.

Definitions – as this is a complex protocol with some detailed terminology you can find more information on the definitions of these terms here.  

Head of School/ Service – discuss the protocol (particularly the Standard, HoSS Guidance, Table of responsibilities and Training matrix) with your Health and Safety Manager to make sure you have a system in place.  Appoint people to fulfil any identified roles and provide them with training in line with the Training matrix.

All other staff and students - make yourself aware of the arrangements/instructions/processes that have been put in place in your school/service  - ask your Health and Safety Manager or Coordinator, if you need more information or support. In particular you should remember to carry out pre-use visual checks before using any LEVs.