Document emrQyX2XZNKNjbnjpVz24wym9

ijjr APR. 15'2002 14:39 2148210977 i Mr*. Marie Girsieiuj KAE5KE REEVES #51.12 P.003/003 Tr'jt/fa Dr, Joseph wagoner, Acting; Director Division of Field Studies 4 clinical investigation national Institute tor Occupational Safety sod Health BOO train St roe t Federal Building, Room T033 Cincinnati, Ohio 4520:2 la obtaining information oo tbe question, advantage may be taken of another set of circumstances, Aaoslte and eroeldollte, the oth er two sojor fibers used In commerce, are not' (Mined la Worth America, end cunt be imported, Records of these Imports have been kept bp tilt Deparoent of Conaserce, W find that nly trivial qunotltj.es oX these fiber* were imported until the lS40's and of these smell gnsounte, crocldolite *u not used In any insulation materials, although ssosite v*s, Therefore, experience of esbe*to insulation workers during tbe 1940'a ood 1950'9 (especially, tbe former) cannot be ascribed t other than the ooe asbestos fiber that was inn regular use lo insulation materials during tbe 1930'a - chrysotlle. Since lung caneer re*es, as well the occurrence of me sot bell coma and deaths of asbestoi*, were demonstrably Increased amqqg theses men during the 1840's and 19 30's, we asp tafer the cbrysottlw-asaocleted risk among tbe{3-5). Since the problem Is en important one, J expect that mere information will become available within tbe next several years* 5inc9raZy yours. US: Jlr 1. McDonald, J.C., McDonald, A.D., Gibb, G.W., Slcmiatyeki, J. sad Rosslfier, C.X, Mortality io tbe ohxysotlle asbestos mines amid mills * of Quebec. Arch. BTC iron. Health. 22(6)j0w7*7-686, June 1971. e * 2. Mancuso, T.F. and 0>lter, E.J. Methodology in industrial hiltb studies. The cohort approach, wntta special reference to an asbestos company. Arch. Envijou, Health 5(2>i210-226 (Feb.) 1963. 3. Sellkoff, X.J., Churg, J, and Hnmmorid, E.C. Asbestos Exposure and Neoplasia. J.A.M.A, 168:22*26, 1964, 4. Selikoff, r.J., Churg, J, and Kommorsil, E.C. The occurrence of . , osbastoais among insulation workers la the United states, Anns, H.r. Ad. 5cs. I3;.(l): 139-155, De<u 31, 1968, 5. Joltkoff; X.J., Hr.amond, E.C. and CTsurg, J, Asbestos enposune, smoking and neoplnsle. J.A.M.A 204( I) : 100-112, April 'i09B