Document LKZN9ezM7aVr3Qb43koy5kk9X

1 are larger, they are really fiber bundles. Page 2626 2 In the electron microscope we divide it into 3 the various components of individual fibers, clusters 4 of fibers, matrix pieces, and we call all of those 5 asbestos structures. So we give a number in terms of 6 asbestos structures per amount of air that we collect, 7 or the amount of air that someone might be breathing. 8 Q Are asbestos fibers categorized by shape or 9 size? 10 A Well, they would be -- there are different 11 types of asbestos fibers. Different types of 12 asbestos. 13 Generally the fibers are characterized in 14 terms of bundles or clusters in terms of shape. 15 Q Back to another point you discussed 16 briefly. 17 You mentioned that there was different 18 approaches for -- different standards used by the EPA 19 and OSHA for fiber size. 20 What are the different fiber sizes that EPA 21 and OSHA looked at?