Document ID: chunk:federal_register_of_legislation:F2016L00412:body:0:p17
Version: federal_register_of_legislation:F2016L00412
Segment Type: other
Provision Reference: 
Character Range: 45543–48518

areas and paint mixing rooms – Design, construction and testing and AS/NZS 4114.2: Spray painting booths, designated spray painting areas and paint mixing rooms – Installation and maintenance
    * be fitted with an exhaust capture system and a ventilation system that includes a filter for removing airborne contaminants
    * have ventilation systems capable of producing a minimum air movement of;
          + 0.3 m/s for a full downdraft booth
          + 0.4 m/s for electrostatic spraying
          + 0.5 m/s for any other booth
    * be inspected at regular intervals and maintained according to manufacturer's specifications, and
    * have a sign indicating the time people should allow for chemicals to clear before entering the spray booth.

Spray booth ventilation control systems should operate a pre-purge cycle to remove any residue contaminants and also operate a minimum of a 5 minute post-purge period following spraying.
Whenever possible, the spray should be directed towards the exhaust air outlet of a booth.
For example, when spraying a tall object in a down-draught booth no spraying should be performed above shoulder height. Extension poles or lift platforms should be used so that
the operator can get above the object and spray towards the air exhaust outlet in the floor.
The spray painter should never be positioned between the spray gun and the exhaust air outlet. See Figures 1 to 8 below for further guidance.

Even with a ventilation system, there is still potential for flammable mists and vapours to accumulate inside the spray booth, which can increase the risk of fire and explosion. Further information to control these risks and ensure equipment and ventilation systems are suitable
for use in a potentially flammable atmosphere is available in AS 1482: Electrical equipment for explosive atmospheres – protection by ventilation, AS/NZS 60079.25: Explosive atmospheres - Intrinsically safe electrical systems and AS/NZS 60079.14: Electrical installations design, selection and erection.

3.2 Ventilation systems
Two common types of ventilation used in spray painting are:
    * Local exhaust ventilation captures the overspray and solvent vapour as close to the source
      of release as possible by drawing the contaminants into a capture hood. They should be fitted with a particulate filtration system to filter overspray. Wherever possible, local exhaust ventilation should be used when a spray booth cannot be used. It may be necessary to use
      it in combination with other control measures. Information on local exhaust ventilation designed for hazardous areas is available in AS 1482: Electrical equipment for explosive atmospheres – protection by ventilation.
    * Dilution ventilation dilutes and displaces contaminated air with fresh air which is supplied
      to the work area by mechanical supply fans or natural air currents through doors, windows
      or other openings in the building. It can be