Washington State University
Environmental Health & Safety General Asbestos Awareness: Online Training

Asbestos-Containing Building Materials (ACM) Continued

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Vermiculite, used for insulation and soil additives, may be contaminated with asbestos fibers

Blown in vermiculite attic insulation Vermiculite used as a soil additive to hold moisture Variations in vermiculite

Other products such as ironing boards or asbestos yarn
Asbestos ironing board surface Asbestos and wire yarn Concrete blocks containing asbestos

Many older (pre-WWII) asbestos-containing products were very dusty and crumbled easily under hand pressure. These products often contained the amphibole type of asbestos fibers and were used in low-density insulation materials.

Today, products commonly contain chrysotile, a less dusty form of asbestos, but one that can still be dangerous. A large number of manufacturers in other countries use chrysotile in the manufacture of a variety of products such as panels, pipes, shingles, tarred roofing materials, brake pads and gaskets.

The most serious health danger lies with any asbestos-containing product that is not being adequately controlled or safely “managed in place.”

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