Document jgdqd3rqpy81oMLKOvmEVrkw9

FILE NAME Corning OC DATE 1966 Aug 8 DOC OC416 DOCUMENT DESCRIPTION Memo RE Kaylo Dust - Bath Iron Works with Handwritten Notes Kaylo is principally a calcium silicate matrix with a range of 12 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 The threshold limit value set by the A.C.G.I.H. is 5 million _ symptoms cubic foot However Dr. Selikoff has stated that only particles per fiber in the body can cause cancer In the past few years medical one have examined the lung tissue of citizens of Johannesburg S.A teams and found that Miami Florida and Pittsburgh Pennsylvania at autopsy 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 ventilation 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 Reward The correspondence does not indicate what readings the or Public Health has obtained from their air samplings what of School ventilation and T.L.V. they approved We should recommend good respirators "-- s- *oe = It is impossible to guess the amount of dust created by the wes cutting sawing etc. of Kaylo There are too many local factors in- Ln tee me nnn PLAINTIFF'S EXHIBIT PS er ' Mr. J. M. Briley -2- ? August 8 1966 volved Bath Iron Works is attacking the problem correctly by consulting with Harvard whose recommendations must be accepted products etc. Again I suggest that we consider the labeling of our Kaylo in the same general way that M labels their Thermobestos , situation I will be after you glad have to write approved letter to A. S. Kevlin about this approach to the matter this FHE JSC F. H. Edwards