-
Some
roofing and siding shingles are made of asbestos cement.
-
Houses
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.
-
Artificial
ashes and embers sold for use in gas-fired fireplaces
may contain asbestos.
-
Older
products such as stove-top pads may have some asbestos
compounds.
-
Walls
and floors around woodburning 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 houses 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.
[Top of Page]
Asbestos
is the name we use to describe a group of natural mineral
fibers that are known for their strength and fire-resistant
properties. Asbestos has been used in thermal insulation and
fire proofing for the construction industry, and in brake
and clutch linings for the automotive industry. Although
asbestos fibers come in blue, brown, and green colors, most
asbestos used in the United States is white asbestos, and is
called chrysotile.
Some
asbestos fibers are so small that a microscope is necessary
to see them. These small fibers can be floating in the air,
and we can breath them deeply into our lungs, where they can
become lodged. Inhaling asbestos fibers increases the
chances of developing lung cancer, mesothelioma (a cancer of
the lining of the body cavities), and asbestos, which cause
shortness of breath and coughing.
In
sum, asbestos is a group of mineral fibers that can be
dangerous to human health when microscopic fibers are
inhaled into the deep recesses of the lungs.
[Top of Page]
Asbestos
fibers can have serious effects on your health if inhaled.
There is no known safe exposure to
asbestos. The greater the exposure, the greater the risk of
developing an asbestos-related disease.
The amount of time between exposure to asbestos and the
first signs of disease can be as much as 30 years. It is
known that smokers exposed to asbestos have a much greater
chance of developing lung cancer than just from smoking
alone.
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:
-
lung
cancer and it may be linked to cancer of the stomach,
intestines, and rectum, as well.
-
mesothelioma,
a cancer of the lining of the chest and the abdominal
cavity; and
-
asbestosis,
scarring of the lungs that leads to breathing problems
and heart failure. Workers who manufacture or use
asbestos products and have high exposures to asbestos
are often affected with asbestosis.
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. [Top
of Page]
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:
-
ASBESTOS
CEMENT ROOFING, SHINGLES, and SIDING. These products are
not likely to release asbestos fibers unless sawed,
dilled, or cut. Want more information if you have
asbestos shingles that need to be replaces?
-
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 woodburning 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.
-
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 [Top of
Page]
If
you think asbestos may be in your home, don't panic! 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. Discard
damaged or worn asbestos gloves, stove-top pads, or ironing
board covers. 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 in your home that might disturb it,
repair or removal by a professional is needed. Before you have
your house remodeled, find out whether asbestos materials are
present. [Top of
Page]
|
You
can't tell whether a material contains asbestos simply
by looking at it, unless it is labeled. If in doubt,
treat the material as if it contains asbestos or have
it sampled and analyzed by a qualified professional. A
professional should take samples for analysis, since a
professional knows what to look for, and because there
may be an increased health risk if fibers are
released. In fact, if done incorrectly, sampling can
be more hazardous than leaving the material alone.
Taking samples yourself is not recommended. If you
nevertheless choose to take the samples yourself, take
care not to release asbestos fibers into the air or
onto yourself. Material that is in good condition and
will not be disturbed (by remodeling, for example)
should be left alone. Only material that is damaged or
will be disturbed should be sampled. Anyone who
samples asbestos-containing materials should have as
much information as possible on the handling of
asbestos before sampling, and at a minimum, should
observe the following procedures:
-
Make
sure no one else is in the room when sampling is
done.
-
Wear
disposable gloves or wash hands after sampling.
-
Shut
down any heating or cooling systems to minimize
the spread of any released fibers.
-
Do
not disturb the material any more than is needed
to take a small sample.
-
Place
a plastic sheet on the floor below the area to be
sampled.
-
Wet
the material using a fine mist of water containing
a few drops of detergent before taking the sample.
The water/detergent mist will reduce the release
of asbestos fibers.
-
Carefully
cut a piece from the entire depth of the material
using, for example, a small knife, corer, or other
sharp object. Place the small piece into a clean
container (for example, a 35 mm film canister,
small glass or plastic vial, or high quality
resealable plastic bag).
-
Tightly
seal the container after the sample is in it.
-
Carefully
dispose of the plastic sheet. Use a damp paper
towel to clean up any material on the outside of
the container or around the area sampled. Dispose
of asbestos materials according to state and local
procedures.
-
Label
the container with an identification number and
clearly state when and where the sample was taken.
-
Patch
the sampled area with the smallest possible piece
of duct tape to prevent fiber release.
-
Send
the sample to an EPA-approved laboratory for
analysis. The National Institute for Standards and
Technology (NIST) has a list of these
laboratories. You can get this list from the
Laboratory Accreditation Administration, NIST,
Gaithersburg, MD 20899 (telephone 301-975-4016).
Your state or local health department may also be
able to help. [Top of Page]
|
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. [Top
of Page]
-
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 floorcovering over it, if possible.
-
Don't
track material that could contain asbestos through
the house. 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. [Top
of Page]
|
Major
repairs must be done only by a professional trained in methods
for safely handling asbestos.
Minor
repairs should also be done by professionals since there is
always a risk of exposure to fibers when asbestos is
disturbed.
Doing
minor repairs yourself is not recommended since improper
handling of asbestos materials can create a hazard where none
existed. If you nevertheless choose to do minor repairs, you
should have as much information as possible on the handling of
asbestos before doing anything. Contact your state or local
health department or regional EPA office for information about
asbestos training programs in your area. Your local school
district may also have information about asbestos
professionals and training programs for school buildings. Even
if you have completed a training program, do not try anything
more than minor repairs. Before undertaking minor repairs,
carefully examine the area around the damage to make sure it
is stable. As a general matter, any damaged area which is
bigger than the size of your hand is not a minor repair.
If
a renovation project requires fairly extensive work, it may be
wise to call in a contractor. In this case, check into his
experience in handling asbestos-containing materials, and
discuss the preventive measures he plans to take.
Before
undertaking minor repairs, be sure to follow all the
precautions described earlier for sampling asbestos material.
Always wet the asbestos material using a fine mist of water
containing a few drops of detergent. Commercial products
designed to fill holes and seal damaged areas are available.
Small areas of material such as pipe insulation can be covered
by wrapping a special fabric, such as rewettable glass cloth,
around it. These products are available from stores (listed in
the telephone directory under Safety Equipment and
Clothing") which specialize in asbestos materials and
safety items.
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 to your home
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 your
family. [Top of Page]
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
correction or abatement contractors repair or remove asbestos
materials.
Some
firms offer combinations of testing, assessment, and
correction. A professional hired to assess the need for
corrective action should not be connected with an
asbestos-correction 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 in your home should provide proof of training
and licensing in asbestos work, such as completion of
EPA-approved 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.
Though
private homes are usually not covered by the asbestos
regulations that apply to schools and public buildings,
professionals should still use procedures described during
federal or state-approved training. Homeowners should be alert
to the chance of misleading claims by asbestos consultants and
contractors. There have been reports of firms incorrectly
claiming that asbestos materials in homes must be replaced. In
other cases, firms have encouraged unnecessary removals or
performed them improperly. Unnecessary removals are a waste of
money. Improper removals may actually increase the health
risks to you and your family. To guard against this, know what
services are available and what procedures and precautions are
needed to do the job properly.
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-correction work. BUT
if they do remove asbestos they WILL be subject to the
requirements! Call 1-800-USA-ROOF for names of qualified
roofing contractors in your area. (Illinois residents call
708-318-6722.) 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-containing
automobile brake pads and linings, clutch facings, and gaskets
should be repaired and replaced only by a professional using
special protective equipment. Many of these products are now
available without asbestos. For more information, read
"Guidance for Preventing Asbestos Disease Among Auto
Mechanics," available from regional EPA offices.
[Top
of Page]
-
Make
sure that the inspection will include a complete visual
examination and the careful collection and lab analysis of
samples. If asbestos is present, the inspector should
provide a written evaluation describing its location and
extent of damage, and give recommendations for correction
or prevention.
-
Make
sure an inspecting firm makes frequent site visits if it
is hired to assure that a contractor follows proper
procedures and requirements. The inspector may recommend
and perform checks after the correction to assure the area
has been properly cleaned.
-
Check
with your local air pollution control board, the local
agency responsible for worker safety, and the Better
Business Bureau. Ask if the firm has had any safety
violations. Find out if there are legal actions filed
against it.
-
Insist
that the contractor use the proper equipment to do the
job. The workers must wear approved respirators, gloves,
and other protective clothing.
-
Before
work begins, get a written contract specifying the work
plan, cleanup, and the applicable federal, state, and
local regulations which the contractor must follow (such
as notification requirements and asbestos disposal
procedures). Contact your state and local health
departments, EPA's regional office, and the Occupational
Safety and Health Administration's regional office to find
out what the regulations are. Be sure the contractor
follows local asbestos removal and disposal laws. At the
end of the job, get written assurance from the contractor
that all procedures have been followed.
-
Assure
that the contractor avoids spreading or tracking asbestos
dust into other areas of your home. They should seal the
work area from the rest of the house using plastic
sheeting and duct tape, and also turn off the heating and
air conditioning system. For some repairs, such as pipe
insulation removal, plastic glove bags may be adequate.
They must be sealed with tape and properly disposed of
when the job is complete.
-
Make
sure the work site is clearly marked as a hazard area. Do
not allow household members and pets into the area until
work is completed.
-
Insist
that the contractor apply a wetting agent to the asbestos
material with a hand sprayer that creates a fine mist
before removal. Wet fibers do not float in the air as
easily as dry fibers and will be easier to clean up.
-
Make
sure the contractor does not break removed material into
small pieces. This could release asbestos fibers into the
air. Pipe insulation was usually installed in preformed
blocks and should be removed in complete pieces.
-
Upon
completion, assure that the contractor cleans the area
well with wet mops, wet rags, sponges, or HEPA (high
efficiency particulate air) vacuum cleaners. A regular
vacuum cleaner must never be used. Wetting helps reduce
the chance of spreading asbestos fibers in the air. All
asbestos materials and disposable equipment and clothing
used in the job must be placed in sealed, leakproof, and
labeled plastic bags. The work site should be visually
free of dust and debris. Air monitoring (to make sure
there is no increase of asbestos fibers in the air) may be
necessary to assure that the contractor's job is done
properly. This should be done by someone not connected
with the contractor.