Document QXybJ3x07zyjkxGwxazDmDjrv

Bed Laboratories 600 Ueuntan Avcnu* Murray Hd. Nmr itrmy 07974 S82-M00 August 4, 1978 E. R. Sullivan ASTM 1916 Race Street Philadelphia, PA 19103 Dear Mr. Sullivan: In reviewing the method of testing for asbestos fibers in work place atmosphere, there seems to be a conflicting statement In Item 11.2.2.1. We appear to be recommending both a 3 to 1 length/width ratio and a ratio between 10 to 1 and 20 to 1. This point should be clarified In the final practices. Section 12: the units on Items C, ? and B are not clear. It is assumed that you cean micrometers rather than meters. Sincerely, LLA 000898