Document O1qMw13YEjzOdqx7ee24ox0ZX

OC-42-2 f OWE NS - CORNING Fiberglas LTINfRA-COMPANY CORRESPONDENCE To Mr. J. M^Briley - Toledo From F. H. Edwards - Toledo Sobiec - , KAYLO DUST - BATH IRON WORKS Date August 8, 1966 v'1 CX / 'p\/ V Kaylo is principally a calcium silicate matrix with a range of 127o to 18% asbestos intermix. Calcium silicate is not considered a health hazard but does create dust when cut or sawed. Asbestos is recognized as a health hazard causing asbestosis. Asbestosis requires 12 years or more of exposure to cause objective symptoms. The threshold limit value set by the A.C.G.I.H. is 5 million particles per cubic foot. However, Dr. Selikoff has stated that only one fiber in the body can cause cancer. In the past few years, medical teams have examined the lung tissue of citizens of Johannesburg, S.A.; Miami, Florida; and Pittsburgh, Pennsylvania at autopsy and found that 30% to 47% had asbestos bodies in the lungs. None of these people were known to have worked in the asbestos industry or mines. Dr. Selikoff claims that the urban atmosphere is full of asbestos fibers emanating from asbestos floor tiles and shingles, auto brake drums, etc. The asbestos industry cannot believe that such a wide asbestos fiber dis tribution is possible and they are pointing the finger at other fibers as the more probable cause of asbestos bodies. Asbestos bodies sometimes develop into mesotheliomas, a tumor with considerable carcinogenic potential. Because of asbestosis (if for no other reason), asbestos fibers should be removed from the atmosphere by adequate ventilation. If ven tilation is impossible, suitable respirators should be worn by workmen. At this point, I believe there is reason to question the A.C.G.I.H. threshold limit. The correspondence does not indicate what readings the Hi*ard School of Public Health has obtained from their air samplings or what T.L.V. they approved. We should recommend good ventilation and/or respirators. It is impossible to guess the amount of dust created by the cutting, sawing, etc. of Kaylo. There are too many local factors in- 01 039 1475 Mr. J. M. Briley -2- August 8, 1966 volved. Bath Iron Works is attacking the problem correctly by consult ing with Harvard whose recommendations must be accepted. Again, I suggest that we consider the labeling of our Kaylo products in the same general way that J-M labels their Thermobestos, etc. I will be glad to write a letter to A. S. Kevlin about this situation after you have approved this approach to the matter. FHE:JSC F. H. Edwards PLAINTIFF'S EXHIBIT sfft.n fy2- 01 039 1476