ABSTRACT

The sizes of the asbestos fibers in a dust sample as determined by a microscopic examination of the material will provide some information about the fibers' probable source. The type of asbestos in the dust may give strong evidence of its source. Some of the individual particles in the settled dust in which asbestos fibers are found can provide information about the original source of the asbestos. The sizes of the asbestos fibers in a dust sample as determined by a microscopic examination of the material will provide some information about the fibers' probable source. Generally, large asbestos fibers do not travel great distances from a source which is losing asbestos fibers by aging or deterioration; therefore, the discovery of large asbestos fibers in a dust sample suggests a local source of the fibers. Arizona Road Dust is a reference material used in a variety of tests as a standard representative outdoor dust.