“…Because of the limitations of the health and environmental data, of which the analyst was aware, and of other matters that were not taken into consideration, as well as the inability to factor in bronchial carcinoma and malignant mesothelioma, a more conservative figure, well below the lower confidence limit calculated could have been considered. The industry employees on the committee were instructed by its Trade Association not only to stand out for the 2 fiber standard, as distinct from the 1 fiber standard initially suggested, but to amend the recommendation for masks to be worn when 5 fibers/ml were exceeded, to when 10 fibers/ml were exceeded [Greenberg, 1997]. BOHS considered that it would have been unthinkable to insist on the more conservative standard originally proposed, as its industry members would have withdrawn (personal communication, Dr. S. Roach).…”