What Is Asbestos?
Asbestos is a mineral fiber. It can be positively identified only with a special type of microscope. There are several types of asbestos fibers. In the past, asbestos was added to a variety of products to strengthen them and to provide heat insulation and fire resistance. Asbestos is the name given to a number of naturally occurring, fibrous silicate minerals mined for their useful properties such as thermal insulation, chemical and thermal stability, and high tensile strength. The current Federal definition of asbestos is the asbestiform varieties of: chrysotile (serpentine); crocidolite (riebeckite); amosite (cummingtonite/grunerite); anthophyllite; tremolite; and actinolite.
How Can Asbestos Affect My Health?
From studies of people who were exposed to asbestos in factories and shipyards, we know that breathing high levels of asbestos fibers can lead to an increased risk of:
- Asbestosis – Asbestosis is a serious,progressive, long-term non-cancer disease of the lungs. It is caused by inhaling asbestos fibers that irritate lung tissues and cause the tissues to scar. The scarring makes it hard for oxygen to get into the blood. Symptoms of asbestosis include shortness of breath and a dry, crackling sound in the lungs while inhaling. There is no effective treatment for asbestosis.
- Lung Cancer – Lung cancer causes the largest number of deaths related to asbestos exposure. People who work in the mining, milling, manufacturing of asbestos, and those who use asbestos and its products are more likely to develop lung cancer than the general population. The most common symptoms of lung cancer are coughing and a change in breathing. Other symptoms include shortness of breath, persistent chest pains, hoarseness, and anemia. People who have been exposed to asbestos and also are exposed to some other cancer-causing product, such as cigarette smoke, have a greater risk of developing lung cancer than people who have only been exposed to asbestos.
- Mesothelioma – Mesothelioma is a rare form of cancer that is found in the thin lining (membrane) of the lung, chest, abdomen, and heart and almost all cases are linked to exposure to asbestos. This disease may not show up until many years after asbestos exposure. This is why great efforts are being made to prevent school children from being exposed.
If you feel you may have been exposed to airborne asbestos fibers, you should consider consulting a physician with expertise in pulmonary abnormalities.
The risk of lung cancer and mesothelioma increases with the number of fibers inhaled. The risk of lung cancer from inhaling asbestos fibers is also greater if you smoke. People who get asbestosis have usually been exposed to high levels of asbestos for a long time. The symptoms of these diseases do not usually appear until about 20 to 30 years after the first exposure to asbestos.
Most people exposed to small amounts of asbestos, as we all are in our daily lives, do not develop these health problems. However, if disturbed, asbestos material may release asbestos fibers, which can be inhaled into the lungs. The fibers can remain there for a long time, increasing the risk of disease. Asbestos material that would crumble easily if handled, or that has been sawed, scraped, or sanded into a powder, is more likely to create a health hazard.
Where Can I Find Asbestos And When Can It Be A Problem?
Most products made today do not contain asbestos. Those few products made which still contain asbestos that could be inhaled are required to be labeled as such. However, until the 1970s, many types of building products and insulation materials used in homes contained asbestos. Common products that might have contained asbestos in the past, and conditions which may release fibers, include:
- STEAM PIPES, BOILERS, and FURNACE DUCTS insulated with an asbestos blanket or asbestos paper tape. These materials may release asbestos fibers if damaged, repaired, or removed improperly.
- RESILIENT FLOOR TILES (vinyl asbestos, asphalt, and rubber), the backing on VINYL SHEET FLOORING, and ADHESIVES used for installing floor tile. Sanding tiles can release fibers. So may scraping or sanding the backing of sheet flooring during removal.
- CEMENT SHEET, MILLBOARD, and PAPER used as insulation around furnaces and wood-burning stoves. Repairing or removing appliances may release asbestos fibers so may cutting, tearing, sanding, drilling, or sawing insulation.
- DOOR GASKETS in furnaces, wood stoves, and coal stoves. Worn seals can release asbestos fibers during use.
- SOUNDPROOFING OR DECORATIVE MATERIAL sprayed on walls and ceilings. Loose, crumbly, or water-damaged material may release fibers. So will sanding, drilling, or scraping the material.
- PATCHING AND JOINT COMPOUNDS for walls and ceilings, and TEXTURED PAINTS. Sanding, scraping, or drilling these surfaces may release asbestos.
- ASBESTOS CEMENT ROOFING, SHINGLES, and SIDING. These products are not likely to release asbestos fibers unless they are sawed, drilled, or cut.
- ARTIFICIAL ASHES AND EMBERS sold for use in gas-fired fireplaces. Also, other older household products such as FIREPROOF GLOVES, STOVE-TOP PADS, IRONING BOARD COVERS, and certain HAIRDRYERS.
- AUTOMOBILE BRAKE PADS AND LININGS, CLUTCH FACINGS, and GASKETS.
Where Asbestos Hazards May Be Found In Residential Construction
- Some roofing and siding shingles are made of asbestos cement.
- Residences built between 1930 and 1950 may have asbestos as insulation.
- Asbestos may be present in textured paint and in patching compounds used on wall and ceiling joints. Their use was banned in 1977.
- Walls and floors around wood-burning stoves may be protected with asbestos paper, millboard, or cement sheets.
- Asbestos is found in some vinyl floor tiles and the backing on vinyl sheet flooring and adhesives.
- Hot water and steam pipes in older residences may be coated with an asbestos material or covered with an asbestos blanket or tape.
- Oil and coal furnaces and door gaskets may have asbestos insulation.
Sample List of Suspect Asbestos – Containing Materials
Note: The following list does not include every product/material that may contain asbestos. It is intended as a general guide to show which types of materials may contain asbestos.
Asphalt Floor Tile
Vinyl Floor Tile
Vinyl Sheet Flooring
Construction Mastics (floor tile, carpet, ceiling tile, etc.)
Ceiling Tiles and Lay-in Panels
Taping Compounds (thermal)
Packing Materials (for wall/floor penetrations)
High Temperature Gaskets
Laboratory Hoods/Table Tops
Elevator Equipment Panels
Elevator Brake Shoes
HVAC Duct Insulation
Ductwork Flexible Fabric Connections
Pipe Insulation (corrugated air-cell, block, etc.)
Heating and Electrical Ducts
Electrical Panel Partitions
Electric Wiring Insulation
Thermal Paper Products
Vinyl Wall Coverings
What Should Be Done About Asbestos?
Usually the best thing is to LEAVE asbestos material that is in good condition ALONE.
Generally, material in good condition will not release asbestos fibers. THERE IS NO DANGER unless fibers are released and inhaled into the lungs.
Check material regularly if you suspect it may contain asbestos. Don’t touch it, but look for signs of wear or damage such as tears, abrasions, or water damage. Damaged material may release asbestos fibers. This is particularly true if you often disturb it by hitting, rubbing, or handling it, or if it is exposed to extreme vibration or air flow.
Sometimes, the best way to deal with slightly damaged material is to limit access to the area and not touch or disturb it. Check with local health, environmental, or other appropriate officials to find out proper handling and disposal procedures.
If asbestos material is more than slightly damaged, or if you are going to make changes that might disturb it, repair or removal by a professional is needed. Before any area of the residence is remodeled, find out whether asbestos materials are present.
Contact a professional asbestos consultant company if renovation or repair activities will impact suspect asbestos containing materials.
How To Manage An Asbestos Problem
If the asbestos material is in good shape and will not be disturbed, do nothing! If it is a problem, there are two types of corrections: repair and removal.
REPAIR usually involves either sealing or covering asbestos material.
Sealing (encapsulation) involves treating the material with a sealant that either binds the asbestos fibers together or coats the material so fibers are not released. Pipe, furnace, and boiler insulation can sometimes be repaired this way. This should be done only by a professional trained to handle asbestos safely.
Covering (enclosure) involves placing something over or around the material that contains asbestos to prevent release of fibers. Exposed insulated piping may be covered with a protective wrap or jacket.
With any type of repair, the asbestos remains in place. Repair is usually cheaper than removal, but it may make later removal of asbestos, if necessary, more difficult and costly. Repairs can either be major or minor.
Repairs must be done only by a professional trained in methods for safely handling asbestos.
REMOVAL is usually the most expensive method and, unless required by state or local regulations, should be the last option considered in most situations. This is because removal poses the greatest risk of fiber release. However, removal may be required when remodeling or making major changes that will disturb asbestos material. Also, removal may be called for if asbestos material is damaged extensively and cannot be otherwise repaired. Removal is complex and must be done only by a contractor with special training. Improper removal may actually increase the health risks to you and occupants.
Asbestos Do’s And Don’ts
- Do keep activities to a minimum in any areas having damaged material that may contain asbestos.
- Do take every precaution to avoid damaging asbestos material.
- Do have removal and major repair done by people trained and qualified in handling asbestos. It is highly recommended that sampling and minor repair also be done by asbestos professionals.
- Don’t dust, sweep, or vacuum debris that may contain asbestos.
- Don’t saw, sand, scrape, or drill holes in asbestos materials.
- Don’t use abrasive pads or brushes on power strippers to strip wax from asbestos flooring. Never use a power stripper on a dry floor.
- Don’t sand or try to level asbestos flooring or its backing. When asbestos flooring needs replacing, install new floor covering over it, if possible.
- Don’t track material that could contain asbestos through the residence. If you cannot avoid walking through the area, have it cleaned with a wet mop. If the material is from a damaged area, or if a large area must be cleaned, call an asbestos professional.
Asbestos Professionals: Who Are They And What Can They Do?
Asbestos professionals are trained in handling asbestos material. The type of professional will depend on the type of product and what needs to be done to correct the problem. You may hire a general asbestos contractor or, in some cases, a professional trained to handle specific products containing asbestos.
Asbestos professionals can conduct home inspections, take samples of suspected material, assess its condition, and advise about what corrections are needed and who is qualified to make these corrections. Once again, material in good condition need not be sampled unless it is likely to be disturbed. Professional abatement contractors repair or remove asbestos materials.
Some firms offer combinations of testing, assessment, and abatement. A professional hired to assess the need for corrective action should not be connected with an asbestos abatement firm. It is better to use two different firms so there is no conflict of interest. Services vary from one area to another around the country.
The federal government has training courses for asbestos professionals around the country. Some state and local governments also have or require training or certification courses. Ask asbestos professionals to document their completion of federal or state-approved training. Each person performing work should provide proof of training and licensing in asbestos work, such as completion of EPAapproved training. State and local health departments or EPA regional offices may have listings of licensed professionals in your area.
If you have a problem that requires the services of asbestos professionals, check their credentials carefully. Hire professionals who are trained, experienced, reputable, and accredited – especially if accreditation is required by state or local laws. Before hiring a professional, ask for references from previous clients. Find out if they were satisfied. Ask whether the professional has handled similar situations. Get cost estimates from several professionals, as the charges for these services can vary.
In addition to general asbestos contractors, you may select a roofing, flooring, or plumbing contractor trained to handle asbestos when it is necessary to remove and replace roofing, flooring, siding, or asbestos-cement pipe that is part of a water system. Normally, roofing and flooring contractors are exempt from state and local licensing requirements because they do not perform any other asbestos abatement work. Call 1-800-USA-ROOF for names of qualified roofing contractors in your area. For information on asbestos in floors, read “Recommended Work Procedures for Resilient Floor Covers.” You can write for a copy from the Resilient Floor Covering Institute, 966 Hungerford Drive, Suite 12- B, Rockville, MD 20850. Enclose a stamped, business-size, self-addressed envelope.
Asbestos in Buildings Publications
The following documents may be useful for addressing asbestos containing materials. The public may request copies of the following documents from the following sources:
TSCA Hotline – Sponsored by the Office of Pollution Prevention and Toxics, the TSCA Hotline provides technical assistance and information about asbestos programs implemented under TSCA, which include; the Asbestos School Hazard Abatement Act (ASHAA), the Asbestos Hazard Emergency Response Act (AHERA), and the Asbestos School Hazard Abatement Reauthorization Act (ASHARA). The Hotline provides copies of TSCA information, such as Federal Register notices and support documents, to requesters through its Clearinghouse function.
E-mail address: email@example.com
Hours of Service: 8:30 a.m. – 5:00 p.m. (EST) M – F
Telephone: 202-554-1404 TDD: 202-554-0551
Fax: 202-554-5603 (Fax available 24 hours a day)
Asbestos Ombudsman –
Hours of Service: 8:30 a.m. – 5:00 p.m. (EST) M – F
Telephone: 800-368-5888 (available 24 hours a day)
This document is a compilation of information obtained from the EPA website, and is intended to provide general information on asbestos and the handling of asbestos containing materials. This document is not to be construed as an asbestos operations and management plan for a specific property. Consult with a licensed asbestos consultant to develop specific operations and management plans.
For further information please visit the EPA website.