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Environmental Asbestos Control

ENVIRONMENTAL ASBESTOS CONTROL

1.

What is asbestos?

Asbestos is the generic name given to a group of naturally occurring fibrous silicate minerals. The three most common types are chrysotile (white asbestos), amosite (brown asbestos) and crocidolite (blue asbestos).

   
2.

Why is asbestos hazardous to health?

Asbestos can split into very fine fibres which can remain airborne for long periods of time after release. When inhaled, asbestos fibres can remain in the body for many years. The following diseases may be caused by exposure to asbestos fibres:

  • lung cancer
  • mesothelioma, a cancer of the lining of the chest or of the abdominal wall
  • asbestosis, scarring of the lung with fibrous tissue

The symptoms of asbestos related diseases may not appear until about 10 to 40 years after first exposure to asbestos.

   
3.

Where can I find asbestos?

Most products made today do not contain asbestos. However, you can find suspected asbestos containing materials in buildings built before the mid 1980s. Some common examples are:

thermal insulation : lagging materials for steam and hot water pipe, heater, boiler, furnace, chimney, flue duct
   
electrical insulation : switch box arc chutes, cable tray
   
sound absorption : acoustic plaster sprayed on ceiling and wall
   
fireproofing : filling material in wall and floor penetration, laboratory bench top, fire blanket, fire curtain
   
building materials : corrugated cement sheet for roofing, wall board, cement roof tile, asphalt roofing felt, vinyl floor covering, cement soil stack, cement pipe, refuse chute, ceiling tile
   
friction products : brake lining, clutch facing
   
building services : air duct flexible joint, cable trough and conduit, cistern
   
sealing and jointing : gasket, gland packing materials for pump and valve, putty, adhesive

You cannot tell with certainty whether a material contains asbestos by its appearance or colour. Therefore, it is safer to take a precautionary attitude and treat all suspect materials as asbestos containing unless proved otherwise by a registered asbestos consultant.


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Last revision date: 28 April 2006