Document 5Kb8nb7EpndomgqMYGvvYOeD

between smoking habit* and the incidence of mesothelioma; thla dlaeaae te equally prevalent In cooker* and non-cookers alike. Of the studies Hated In Table 4, only Study no. 13 of chrysotlle factory workers ^howa > lung cancor nortallty that would ba expected fron the looking habits alone. Asbestos fritters and millers. Ken working In the elnlng and Billing it asbestos or* ara generally expoaed to only ona fora of fiber. A few exceptions occur in tho nlnlng regions of South Africa, where sone worker* have been employed in croddollta, aaoslte, and chrysotlle nines. Vnthophylllto and trenollte asbestos nlners nay have been expoaed to one chrysotlle asbestos, because theso minerals can coexist In meta morphosed ultranaflc rocks, for exanplo those of Paakklla, Finland, and Kenlah, Idaho. Epidemiological studies of asbestos miners and nlllera who were exposed to only one form of asbostos are useful for understanding how the different eabcatoa minerals affect human health. In Table S are given the mortality data for the five major epidemiological studies of acbestos miners and millers. In addition, three studies are given of miners exposed to cuoraingtonlte and gmnerlta emphlbole dusts and ona study of tunnel workers expoaed to hornblende emphlbole dust. Some classify these amphlboles as asbestos, oven though they do not possess the physical properties requisite to ho valuable cotnerclally. Such a classification has been made In the case of taconlte mining by the courts (United States District Court for Minnesota, 3S0 F, Supp. 11) and by the t.S. Environmental Protection Agency (Reserve Mining vs EPA, U.S. Court of Appeals Eighth Circuit, March 14, 1973), which ha* sued to prevent the Reserve Mining Company from dumping taconlta talllnga Into Lake Superior because of the perception that theso talllnga contain "amoslte asbestos" and thus constitute a threat to public health. For a complete review of tho case, see 314 Federal Reporter, 2d Series, 492-342, 1973; 236 Forth Western Reporter, 2nd Series, 808-852, 1977. Of Interest re garding this suit are the health studies accomplished on the Reserve Iron ere miners exposed to cuoilngtonlt* and grunsrlte In the taconlte rock (Table 5, Study II) and on the Homestaka gold miners exposed to MS 8005 0065 f 55 s: 5 25 H I ** ^5 25 * fill ll fc t 5 * is! I!! fi s:5 ss:f ;s I > Ml is s: i .=::! e: * i- IS 1 ^ *25- == ^ I ! il jii l! i ii iy HiMi =55 "55 =5 *555 * 1 h s Si pin * *2 h If! ! '!* s552 ii zi~ 5* :.|5 if H ii ii *::i li is i F: c *2S3 =25* *: `335 if s? Ii III 44 n $ ); ii jilt lii S!i!liftIi ii 5 ii 111 h >kr A liiu !U: ' !ru in* ~ =:?( i : -: i rr Ziri i-:- Pii Ii ir m 15.* Is! Is i y p ui: U iifii! s !f I 1i ii* I Ir - ii ; fiSi in ilUfi ililliii s szz 309 PRODUCED BY FORD