Control of Substances Hazardous to Health Regulations (Northern Ireland) 2003

PART II containment measures for health and veterinary care facilities, laboratories and animal rooms

Containment measures	Containment levels
	2	3	4
1.  The workplace is to be separated from any other activities in the same building.	No.	Yes.	Yes.
2.  Input air and extract air to the workplace are to be filtered using HEPA or equivalent.	No.	Yes, on extract air.	Yes, on input and double on extract air.
3.  Access is to be restricted to authorised persons only.	Yes.	Yes.	Yes, via air-lock key procedure.
4.  The workplace is to be sealable to permit disinfection.	No.	Yes.	Yes.
5.  Specified disinfection procedures.	Yes.	Yes.	Yes.
6.  The workplace is to be maintained at an air pressure negative to atmosphere.	No.	Yes.	Yes.
7.  Efficient vector control e.g. rodents and insects.	Yes, for animal containment.	Yes, for animal containment.	Yes.
8.  Surfaces impervious to water and easy to clean.	Yes, for bench.	Yes, for bench and floor (and walls for animal containment).	Yes for bench, floor, walls and ceiling.
9.  Surfaces resistant to acids, alkalis, solvents, disinfectants.	Yes, for bench.	Yes, for bench and floor (and walls for animal containment).	Yes, for bench, floor, walls and ceiling.
10.  Safe storage of biological agents.	Yes.	Yes.	Yes, secure storage.
11.  An observation window, or alternative, is to be present, so that occupants can be seen.	No.	Yes.	Yes.
12.  A laboratory is to contain its own equipment.	No.	Yes, so far as is reasonably practicable.	Yes.
13.  Infected material, including any animal, is to be handled in a safety cabinet or isolator or other suitable containment.	Yes, where aerosol produced.	Yes, where aerosol produced.	Yes.
14.  Incinerator for disposal of animal carcases.	Accessible.	Accessible.	Yes, on site.