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CMC Asbestos Surveys: Asbestos Glossary - T

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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Thermal System Insulation
Material applied to pipes, fittings, boilers, breeching, tanks, ducts, or other interior structural components to prevent heat loss or gain, or water condensation, or for other purposes.

Thermal System Insulation ACM
Thermal system insulation that is an Asbestos Containing Material.

Transmission Electron Microscopy (TEM)
A method of microscopic analysis which utilizes an electron beam that is focused onto a thin sample. As the beam penetrates (transmits) through the sample, the difference in densities produces an image on a fluorescent screen from which samples can be identified and counted.

A swelling or growth of cells and tissues in the body.

Time Weighted Average, as in asbestos air sampling.

Type 1 Asbestos Survey ( Location and assessment survey)
A presumptive (walkaround) survey carried out without disturbing asbestos or any part of the fabric, components or finishes.

Type 2 Asbestos Survey ( Standard sampling, identification and assessment survey)
A non intrusive survey as above but also entering into accessible ducts, suspended ceilings and other accessible voids, where possible. Required for the asbestos register. Will not detect asbestos concealed or 'hidden' within a building.

Type 3 Survey (Full access sampling and identification survey)
Pre-demolition & Refurbishment) - A survey as above but with an invasive element e.g. taking core samples from partitions, lifting floorboards and investigating back to the structure where possible. Should detect hidden and concealed materials. Required for projects, major works and maintenance work of an invasive nature.

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