Document bNOEQq6vyE444r1JQrQL4DM3

Page 2622 1 OSHA, also, to use the electron microscope. And there 2 are some of their groups -- for instance, their Salt 3 Lake City Research Lab uses the electron microscope in 4 a lot of their studies, but they have not made that a 5 requirement for monitoring of occupational settings. 6 Q Why hasn't OSHA used the more advanced TEM, 7 transmission electron microscopy, in their 8 regulations? 9 A My understanding is that a part of it deals 10 with the fact that they have a lot of data on the 11 light microscope system, and they don't have as much 12 on the electron microscope system. 13 Until they can get a lot more information, 14 they don't want to shift over and deal with better 15 technology. 16 They do admit they are only counting a 17 portion of the fibers, that there are a lot of them 18 they don't see. 19 Q A term that we have heard here, Dr. 20 Millette, is encapsulation as it relates to asbestos. 21 Can you define and describe for us what that