Out of hours working

In general

Access to the building is available only to authorised personnel.

Members of the Centre entering at night or at weekends must sign the out-of-hours book on entering the building. These books are located at the main and rear (car park) entrances. The reason for this is in case of fire. The fire brigade should not risk their lives "rescuing" people who are not in the building. Similarly, those remaining after the end of the normal working day should also make an entry when there are no more than two people remaining in the building, or in any case, after 18.00 hours. Members of the Centre working outside normal hours may be contacted by family or friends via the intercom system situated at the main and rear (car park) entrances.

Category O - Insignificant hazard

Such work may be carried out at any time on the grounds that the risk is no different from that to which a person living alone is subject to when carrying out similar operations at home:

  • Microscopy
  • scoring
  • computing
  • reading
  • scintillation counting
  • writing
  • typing
  • etc.

Category 1 - Low hazard

This includes normal experimental work with which the individual is familiar. To carry out this work outside of normal working hours, individuals must have signed approval from their immediate supervisor. Persons working alone may notify Security when they arrive, giving the proposed time of departure with a request that Security make a check if they have not subsequently informed Security of their imminent departure from the building. An alternative is to notify someone who will raise the alarm if the member of staff does not return at a set time.

  • Removal of ampoules from liquid nitrogen
  • Use of mutagens and highly toxic chemicals
  • Bacteriology
  • Use of ultracentrifuges
  • Lymphocyte separation
  • Electrophoresis
  • Use of Gamma source
  • Standard biomedical procedures
  • General genetic modification
  • Work with oncogenes
  • Use of UV sources
  • Work in dark room
  • Cell culture
  • Work with other radioisotopes
  • Sequencing Gels
  • Use of Gamma source
  • Standard biomedical procedures
  • General genetic modification
  • Work with oncogenes
  • Use of UV sources
  • Work in dark room
  • Cell culture
  • 32P work

Category 2 - Medium hazard

Operations designated as Category 2, also require signed approval and must not be carried out without the presence of another person within earshot (i.e. no radios or personal stereos). The following are currently classified as Category 2:

  • Liquid Nitrogen dispensing
  • Work involving substantial quantities of solvents
  • Large scale DNA preps (involving the use of phenol/chloroform)

Category 3 - High hazard

Such operations must NOT be carried out outside the hours when the University Rescue Team is in attendance (currently 09.00-17.30 Monday - Thursday, 09.00-17.00 Friday). The following are currently classified as Category 3:

  • Distillation of flammable liquids
  • Use of solvents in bulk quantities (greater than 3 litres)