Document zQQ9rmLpo2g00v74nBRzRVO73

Mr. Wait Morrison is ad rift Plant April 3, 1944 Messrs. D. E. Dmm Tom Klara y w ait Dadehe AJEE3T06 Dear Mr. Morrlaoa: Tha question of tha health haaard associated with aahaatoa la currontly up for ree valuation la medical circlaa. Wa kaow oaa thing tor cartala: It caa cause fibrosis of tha lungs. Tha debate now cantart about tha severity of thia fibrosis, tha axpoaura required to produce harmlul effects, had tha relationship between asbestos and caacar of tha lung and/or long lining (plaura), Tha racommandad maximum laval of aabaatoa la air whara employee expoaurat occur ia 9 million purtlclaa par cu. ft. Juat coacaatratioaa caa ba maaturad with an alactrottatlc praclpitator or through othar ataadard dual counting techniques, versons chronically axpoaad to aabaatoa duat ahould ba followed by par iodic cheat x-rays and physical examinations at a frequency of one to two years. Adequate personal protection la provided by tha MSA Oustfoe respirator provided tha fit of tha respirator ia satisfactory. 1 attach a copy of our standard toxicity write up oa asbestos. I trust thia will aaawar your questions. Now, I have oaa: Are you quite sure that tha material la tha Poly T unit la true asbestos? I was unaware of Its use. I do recall queries concerning othar products such as superflo**, diatomacsous earth, etc., which might have harmful aflacta but use of true asbestos has navsr bean brought to my attention. How la It used sad do you have any preliminary assess manta of tha severity of tha duet problem? Yours vary truly. R. E. Joyner, M. 0. REJ/eb :j.S. Jo not hire aay female operators. UCCTXC 0721/