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CMC Asbestos Surveys: Asbestos Glossary - A

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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Asbestos-containing building material. Means surfacing ACM, thermal system insulation ACM, or miscellaneous ACM that is found in or on interior structural members or other parts of a school building.

Asbestos Containing Material. This can be a product with anything from 99% asbestos concentration to less than 1% and is used to refer to the vastly different types of such material.

A type of cancer that begins in the cells that line certain internal organs such as the lungs.

When referring to ACM, the material is subject to disturbance by occupants or maintenance personnel in the course of their normal activities.

Adjuvant therapy
A supplemental treatment to the main medical procedure. This treatment usually comes in the form of radiation therapy or chemotherapy and is employed after surgery.

Advanced Cancer
The stages of cancer in which the disease has spread from its original location in the body.

Aggressive Sampling
Air sampling which takes place after final clean-up while the air is being physically agitated to produce an asbestos "worst case" scenario.

Asbestos Insulation Board. Used primarily for fire protection, thermal insulation, partitioning and ducts (plenums).

Airborne Asbestos Analysis
Determination of the amount of asbestos fibres suspended in a given amount of air.

Airborne Fibre Count Certificates
These are Certificates issued following airborne asbestos analysis for a variety of purposes such as reassurance testing, asbestos works leak testing and personal testing. See also Certificate of Re-Occupation

Air Diffuser
A device designed to disperse an air stream throughout a given area.

Air Erosion
The passage of air over friable ACBM which may result in the release of asbestos fibres.

Air Lock
A system of enclosures consisting of two polyethylene curtained doorways at least three feet apart that does not permit air movement between clean and contaminated areas.

Air Man
An industrial hygienist or other qualified individual who collects air samples and monitors the asbestos abatement worksite.

Air Monitoring
The process of measuring the airborne fiber concentration of a specific quantity of air over a given amount of time.

Air Plenum
Any space used to convey air in a building or structure. The space above a suspended ceiling is often used as an air plenum.

A universally accepted procedure developed for the purpose of solving a particular problem. algorithms developed for asbestos provide a numerical index for evaluating a degree of hazard in a particular area. The Sawyer Algorithm and the Ferris Index are two, but neither are widely used today.

Amphibole Asbestos
Asbestos characterized by straight fibres with a chain-like structure. Two common forms are amosite (brown) and crocidolite (blue).

Is the commercial name given to a naturally occurring fibrous silicate mineral commonly used in construction materials and other products because of its high heat resistance, strength and durability. Over time, exposure to asbestos may lead to asbestosis, mesothelioma and lung cancer.

This is a scarring of the lung tissue that can occur alongside pleural plaques and pleural thickening. There are different scales of asbestosis but in the worst cases, it will restrict breathing and often be degenerative. It takes between 15 and 30 years for the disease to manifest following exposure to asbestos.

Asbestos Abatement
The removal of asbestos containing materials from structures. Only a licensed, experienced contractor should perform asbestos removal.

Asbestos Cement
A hard product that contains approx. 15% asbestos fibres which can be any of the three main types. This is a relatively low risk material provided it remains intact. When used for roofing the risks to operatives can be greater from falls than asbestos exposure. This material does not normally require a licence to remove but must utilise trained and equipped operatives in accordance to CAR2006 and be transported and disposed of in accordance to the Hazardous Waste Regulations.

Asbestos Consultant
Any person who contracts to provide professional health and safety services relating to asbestos-containing construction material. The activities of an asbestos consultant include building inspection, abatement project design, contract administration, sample collection, preparation of asbestos management plans, clearance monitoring, and supervision of site surveillance technicians.

Asbestos-containing Construction Material (ACM)
Any manufactured construction material which contains more than one-tenth of 1 percent asbestos by weight.

Asbestos-containing Waste Materials
Asbestos Mill tailings or any other waste materials that may contain commercial asbestos. This term includes filters from control devices, friable asbestos waste material, and bags or other similar packaging contaminated with commercial asbestos. As applied to demolition and renovation operations, this term also includes regulated asbestos-containing material waste and materials contaminated with asbestos including disposable equipment and clothing.

Asbestos Control
Minimizing the generation of airborne asbestos fibres until a permanent solution is developed.

Asbestos Debris
Pieces of ACBM that can be identified by color, texture, or composition, or means dust, if the dust is determined by an accredited inspector to be ACM.

Asbestos Exposure Assessment System
A decision tool which can be used to determine the extent of the asbestos hazard that exists in a building, and which can also be used to develop corrective actions.

Asbestos Fibres
Fibres with their length being greater than five microns (length to width ratio of 3:1), generated from an asbestos-containing material.

Asbestos Mill
Any facility engaged in converting, or in any intermediate step in converting, asbestos ore into commercial asbestos. Outside storage of asbestos material is not considered a part of asbestos mill.

Asbestos Pleural Disease
A disease characterized specifically by scarring of the membranes lining the lungs and chest cavity.

Asbestos Regulations
Regulations made under the Health & Safety at Work Act 1974 which control management and work with ACMs, removal and disposal together with the responsibilities for employers, managers, employees, contractors, visitors and designers.

Asbestos-related Work
Any activity which by disturbing asbestos-containing construction materials may release asbestos fibres into the air and which is not related to its manufacture, the mining or excavation of asbestos-bearing ore or materials, or the installation or repair of automotive materials containing asbestos.

Asbestos Tailings
Any solid waste that contains asbestos and is a product of asbestos mining or milling operations.

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