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CMC Asbestos Surveys: Asbestos Glossary - F

Latest Asbestos News

HSL investigation refutes asbestos claims over safe cement

The Health and Safety Laboratory (HSL) have investigated claims that chrysotile in asbestos cement changes into a non-asbestos fibrous material called Casitile. The claims also suggested that this process is 100% efficient and no chrysotile asbestos remains in the matrix and no release of airborne chrysotile fibres can occur.

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Any processing (e.g. cutting, sawing, drilling) of a manufactured product that contains commercial asbestos, with the exception of processing at temporary sites (field fabricating) for the construction or restoration of facilities. In the case of friction products, fabricating includes bonding, debonding, grinding, sawing, drilling, or other similar operations performed as part of fabricating. 

The portion of a respirator which covers the wearer's nose, mouth , and eyes in a full facepiece.

The intermittent release of fibres which occurs as a result of weakened bonds in the material, or because of deterioration.

fibres per cubic centimeters of air.

Fibre or Fiber
A particulate form of asbestos, 5 micrometers or longer, with a length-to-diameter ratio of at least 3 to 1.

Fiber Releasability
The potential for generation of airborne fibres from an asbestos-containing source.

Fiber Release Episode
Any uncontrolled or unintentional disturbance of ACBM resulting in visible emission.

The development of excessive scar-like fibrous tissue. Punctures caused by asbestos fibres can lead to fibrous scar tissue build-up in the lungs.

Composed almost entirely of fibres.

Fibrous Aerosol Monitor (FAM)
A portable survey instrument with the capability of providing instantaneous asbestos concentration readings.

Spray-on trowel-applied fire resistant materials.

Any material that, when dry, may be crumbled, pulverized, or reduced to powder by hand pressure, and includes previously nonfriable material after such previously nonfriable material becomes damaged to the extent that when dry it may be crumbled, pulverized, or reduced to powder by hand pressure.

Friable Asbestos
Any material containing more that 1 percent asbestos as determined using Polarized Light Microscopy, that, when dry, can be crumbled, pulverized, or reduced to powder by hand pressure. If the asbestos content is less than 10 percent as determined by a method other than point counting by polarized light microscopy (PLM), verify the asbestos content by point counting using PLM.

Fugitive Source
Any source of asbestos emissions not controlled by an air pollution control device.

Full Facepiece Respirator
A respirator which covers the wearer's entire face from the hairline to below the chin.

Functional Space
A room, group of rooms, or homogeneous area (including crawl spaces or the space between a dropped ceiling and the floor or roof deck above) designated by a person accredited to prepare management plans, design asbestos abatement projects, or conduct asbestos response actions.

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