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What Everyone Should Know About Asbestos
Asbestos material that is disturbed by handling, hitting, rubbing, or exposed to airflow or extreme vibration can be hazardous. It is important to limit access to any area where there is damaged asbestos. Also, do not touch or disturb the material any further. If damaged asbestos is suspected people are educated to contact their local environmental or public health officials for the proper testing and removal procedure.
It is important for people to test for asbestos before remodeling. Unless there is specific labeling, they should know that they cannot identify asbestos by looking at it. It is recommended to have a professional test for asbestos. If sampling is not done correctly it can create a larger hazard by releasing asbestos fibers into the air. Only material that is actually going to be disturbed needs to be tested.
As you can see the most important fact stated about asbestos is to leave it alone. Precautions need to be made to avoid disturbing asbestos containing materials, and testing and removal needs to be done by professionals.
Where Would You Find Asbestos?
Acoustical Plaster
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Adhesives |
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Attic Insulation (Vermiculate)
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Base Flashing
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block etc)
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Blown-in Insulation
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Boiler Insulation
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Breeching Insulation
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Carpet, ceiling tile, etc.
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Caulking/Putties
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Ceiling Tiles and Lay-in Panels
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Cement Pipes
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Cement Siding
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Cement Wallboard
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Chalkboards
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Construction Mastics (floor tile)
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Cooling Towers
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Decorative Plaster
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Ductwork Flexible Fabric connections
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Electric Wiring Insulation
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Electrical Cloth
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Electrical Panel Partitions
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Elevator Brake Shoes
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Elevator Equipment Panels
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Fire Blankets
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Fire Curtains
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Fire Doors
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Fireproofing Materials Taping Compounds (Thermal)
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Flooring Backing
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Heating & Electrical Ducts
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High Temperature Gaskets
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HVAC Duct Insulation
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Joint Compounds
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Laboratory Gloves
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Laboratory Hoods/Table Tops
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Packing Materials (for wall/floor penetrations)
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Pipe Insulation (corrugated, air-cell)
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Roofing Felt
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Roofing Shingles
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Spackling Compounds
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Spray-Applied Insulation
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Textured Paints/Coatings
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Thermal Paper Products
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Vinyl Floor tile
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Vinyl Sheet Flooring
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Vinyl Wall Coverings
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Wallboard |
What To Do About Asbestos In Buildings?
There are basically four options:
- Label It
Leave the asbestos intact (but labelled) if it is in good condition, unlikely to be disturbed and unable to feed fibres into workers' breathing zones.
- Enclose It
Enclose the asbestos so that disturbance of the asbestos material and entry into the enclosure is not possible.
- Seal It
Encapsulate (or deep seal) the asbestos, if it is in good condition and unlikely to be disturbed.
- Remove It
Remove the asbestos if its surface is damaged or crumbling, or it is likely to be disturbed for example by maintenance work.
Removal of asbestos obviously eliminates the hazard forever - provided it is done with the best control procedures, with competent removal experts, good supervision and a well informed workforce. But often this is not the case in practice.
Asbestos Removal and Sealing
Reducing exposure to asbestos by repairing damaged material will involve covering the material or sealing it. Sealing is commonly used for pipe, furnace, and boiler insulation. The sealing process either coats the material, reducing fiber release, or binds the fibers together. A covering can be used instead of sealant, also preventing the release of fibers. Both these methods are relatively cheap when compared with removal, but future removal may still be necessary. Another technology used in reducing exposure to asbestos is personal protective equipment. Respirators with HEPA filters should be worn when working with asbestos, in addition to other controls.
Removal is the most expensive method of dealing with asbestos, and it also has the greatest risk involved, due to the large number of fibers that may possibly released in removing it. The most common way to reduce asbestos emissions during renovation, demolition, cutting or stripping of asbestos material is to use a wetting agent throughout to keep asbestos from becoming airborne. It is important that the material is adequately wet to prevent release. There are different wetting techniques for different types of material. The material should be sealed in containers after removal. A HEPA filter vacuum is essential for cleaning. It is important to never use a vacuum without HEPA filter; it will just spread the asbestos. Portable air ventilation systems can be used to protect workers from asbestos. Enclosure equipment is often used when working on brakes, to separate the worker from
asbestos; the wet method is also used for brakes.
Today's technology makes it possible to monitor for asbestos, keep asbestos exposure below permissible limits, and remove the hazard. It protects the health of many people who would otherwise be exposed.
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