Document 65p11oJpN07KvyxEKjVQbOgR3

Preliminary Dost Survey for Asbestos Textile Institute June, i$k7 > 21 Ul - HT 8.I C A L gccangxciwcB of post codhts Correlation "between development of asbestosla and some pertinent measure of dustiness, e.g, dnat counts, can be developed by periodically ob serving RTv^ recording data on both aspects -- periodic radical exnalnations of exposed workers together with the periodically measured dust exposure of finch. However, to be useful for preventive purposes, tbeseproeedurea have to be extdn&*ed into the.past wherever data la available This vas the proced- \ ure employed In the studies of-the IT.3.Public Health Service In Harth Carolina plants (Public Health Bulletin Ho. 2hl, 1938). The main value of dost counts In asbestos plants Is to obtain data on dust concentrations, that can be ccopaxedwlth that study, and thus lead to conclusions as to probability of development of asbestosla in the particular plant being Btudleft. In that study, dustiness of different occupations vas measured In the usual manner, and also the incidence of asbestosis by medical and X-rey * estaminaticns of the "men employed, A statistical comparison of the two sets of data lad the investigators to the conclusion that new cases of asbestosla ' would probably not occur If dust control measures were undertakento ensure tint no dust exposures exceeded five mlIlian particles per cubic foot (measured In the same manner)*