Liberty Mutual had a study conducted in 1929 at a factory that manufactured brake linings and clutch facings. A consultant's report states that the study "deals with the health hazard arising in the manipulation of asbestos fibre in the manufacture of clutch facings and brake linings." The study included observations of the manufacturing process and a review of some of the workers' medical information.
Air sampling was conducted in workrooms. The report said, "that the workrooms may be divided into two groups, based on their dust content. In one group, that of high dust exposure (about 19 million particles), are processes of carding and crushing. In the second group, that of less dust exposure (7.5 millions of particles and less), are the processes of spinning, picking, yarn finishing and weaving."
As for the health of some of the workers, a consultant reported that, "In [the weaving workroom] employing some 50 workers, six have been found to be suffering from asbestosis in some form, in 2 cases complicated by tuberculosis. The occupational exposure was in all cases over seven years and in two of the cases 10 years and over."
Comments