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asbestos abatement : ウィキペディア英語版
asbestos abatement


Many buildings contain asbestos, which was used in spray-applied flame retardant, thermal system insulation, and in a variety of other materials. Asbestos was sometimes "flocked" above false ceilings, inside technical ducts, and in many other small spaces where firefighters would have difficulty gaining access. Structural components like asbestos panels were also used. In residences, asbestos was often a component of a type of flocked acoustic ceiling called popcorn ceiling or "cottage cheese ceiling", until its production was banned in the US in 1978. However, the ban allowed installers to use up remaining stocks, so houses built as late as 1986 could still have asbestos in their acoustic ceilings. The only way to be sure is to remove a sample and have it tested by a competent laboratory.
==Rationale==
Depending on how and where asbestos was applied, it might not pose any risk to most users of the building. If the fibers cannot become dislodged, they cannot be inhaled, and thus the asbestos poses no risk. However, some methods of applying asbestos, particularly flocking, allow asbestos fibers to gradually drop off into the air. Asbestos poses hazards to maintenance personnel who have to drill holes in walls for installation of cables or pipes. Even if the workers are protected, such maintenance operation may release fibers into the air, which may be inhaled by others. Interventions in areas where asbestos is present often have to follow stringent procedures.
When asbestos fibers can easily be made into airborne dust, the material is known as "friable". For example, a popcorn ceiling is extremely friable, whereas asbestos floor tile is considered non-friable.
Different countries have different regulations and methods of enforcement, when it comes to asbestos removal. It is extremely important to remember that prior to any asbestos removal procedures taking place; the client has a duty of care and must verify that the specialist removal contractor can provide proof of the following:
*license if licensing is required within the jurisdiction
*specific asbestos public and employer liability insurance
*worker training to include supervisor and contract manager training within the past 12 months
*worker fit-testing and medical surveillance within 12 months
*specialist equipment testing within 6 months - DOP and PAT within the EU
Optionally, the specialist contractor should be able to provide accreditation from ARCA or other such trade organization.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「asbestos abatement」の詳細全文を読む



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