Document DMgw8yKv6NYYpJ4XYeGbYG5Ln

1 in 1933 after Merewether's report. Page 3386 2 And he predicted that with the regulations 3 in place, which it was thought would eliminate 4 asbestosis, that that would also eliminate lung 5 cancer. 6 Q Doctor, the jury has heard about this term 7 ACGIH, and I don't want to spend a lot of time on it, 8 but did they, in the '40s and '50s, based on these 9 things, adopt what is known as the TLV, the threshold 10 limit value? 11 A Yes. The ACGIH in 1946 they for many, many 12 years published a whole list of substances that 13 workers would encounter in the workplace as to a safe 14 level of exposure, and these included toxic things 15 like arsenic, lead, as well as mineral dust, which 16 silica was the major. 17 In 1946 they added asbestos to the category 18 of mineral dust, and established a level of five 19 million particles per cubic foot as the level to which 20 dust control measures should be aimed in order to 21 prevent disease. The number obviously came from