Document ym2kXRQ4aMdDRrO8QZkNQbwm6

1 the same shipyards earlier appraised by Fleischer. Page 2273 j 2 He is reporting in 1968 after doing studies, 3 the same thing Dr. Selikoff reported in '65, that : 4 insulators' exposures to asbestos were within the five 5 million particle per cubic foot TLV? 6 A Generally, but the page before this he talks 7 about how impossible it is to actually calculate a 8 time-weighted average for an insulator given this 9 varied nature of work. 10 It points out the data in the literature, j 11 but some were impossible to calculate the exposure 12 with these types of workers. 13 Q They wrote another paper that estimated the 14 average exposure with the limitations you have talked 15 about is really about five million particles. 16 Do you agree with that? 17 A I have seen various estimates. The EPA in ! 18 its risk assessment update in 1986 estimated that 19 historical exposure of insulation workers were likely 20 around 12 to 15 fibers per cc and tried to express it j 21 in fibers per cc. j