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CMC Asbestos Surveys: Asbestos Glossary - C

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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A cellular tumor which normally leads to premature death of its host unless controlled.

the Control of Asbestos Regulations, enacted in 2006

A substance that can cause cancer or help it grow.

Certificate of Re-Occupation
A certificate that can be only issued by an UKAS company following asbestos works - it deems the work area satisfactory to return to 'normal occupation'.

Category I Nonfriable Asbestos-Containing Material (ACM)
Asbestos-containing packing, gaskets, resilient floor covering, and asphalt roofing products containing more than 1 percent asbestos as determined using the method specified in appendix A, subpart F, 40 CFR part 763, section 1, Polarized Light Microscopy.

Category II Nonfriable ACM
Any material, excluding Category I nonfriable ACM, containing more than 1 percent asbestos as determined by using the methods specified in appendix A, subpart F, 40 CFR part 763, section 1, Polarized Light Microscopy that when dry, cannot be crumbled, pulverized, or reduced to powder by hand pressure.

Asbestos-containing materials that are densely packed, granular and are friable.

Certified Supervisor
An individual who is capable of identifying asbestos hazards in the workplace and who has sufficient experience and authority to take prompt corrective measures to eliminate them.

Cubic feet per minute

The technical name for white asbestos.

The technical name for blue asbestos.

Tiny hair-like structures in the windpipe and bronchi of the lung passages that help force undesirable particles and liquids up and out of the lungs.

Clean Area
The first stage of the decontamination enclosure system in which workers prepare to enter the work area.

Contaminated Items
Any objects that have been exposed to airborne asbestos fibres without being sealed off or isolated.

Curtained Doorway
A device to allow ingress or egress from one room to another while permitting minimal air movement between the rooms, typically constructed by placing two overlapping sheets of plastic over an existing or temporarily framed doorway, securing each along the top of the doorway, securing the vertical edge of one sheet along one vertical side of the doorway and securing the vertical edge of the other sheet along the opposite side of the doorway.

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