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Asbestos is a
natural fibrous material mined from serpentine rock. The
rock is crushed and fibrous strands of asbestos are extracted
from the rock. The strands are then used as ingredients
in insulation, ceiling tiles and other materials. Three
major types of asbestos used commercially are:
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Chrysotile,
or white asbestos, has curly fibers and is known as serpentine
because it is found in serpentine rocks. This form of
asbestos is used predominantly used in products manufactured
in the United States. This asbestos is mined mostly in
Canada and then shipped to the United States.
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Crocidolite,
or blue asbestos, has rod like fibers. This form is the
least used in the United States.
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Amosite
has brown rod like fibers belonging to the amphibole group,
and contains iron and magnesium.
Items
Containing Asbestos
Most
insulation materials before the mid-1970s contained asbestos.
More than 5,000 products have contained asbestos. A few
of the products containing asbestos are:
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Cement
sheets and pipe products used for roofing and siding,
electrical casings, fireproofing spray and materials,
building materials and piping.
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Asbestos
paper products such as table pads, industrial filters,
wire insulation and heat protective mats
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Friction
products such as brakes and clutches
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Textile
products such as roofing materials, fire-resistant
materials
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Also included
are plastics, artificial ashes and embers, paints,
caulking
Shipyards
With Asbestos Exposure
US Navy
Portsmouth
Puget Sound
Pearl Harbor
Norfolk
Commercial
American Shipyard Corp.
AMFELS, Inc.
Atlantic Marine Shipyards
Avondale Industries, Inc.
Bender
Bollinger Shipyards, Inc.
Colonna's Shipyard, Inc.
Cascade General
Eastern Shipbuilding Group
Ingalls Shipbuilding
Halter Marine Group, Inc.
Honolulu Marine, Inc.
McDermott Shipbuilding Inc.
Metro Machine Corporation
National Steel and Shipbuilding Company
Norfolk Shipbuilding & Drydock Corporation
Ocean Technical Services, Inc
Portland Ship Yard
San Francisco Shipyards
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