Document bygmb172y2vDvXLGy4gNkpBwD

TO: Interoffice Communication FROM: DATE: SUBJ: Dave Penney-Austin TGG: JCL ERT: MJH: AJO: RF T. G. Grumbles April 24, 1990 XF: NIOSH REQUEST FOR MINERAL FIBER INFORMATION I spoke with Clayton Doak at NIOSH today regarding the Federal Register announcement. NIOSH is doing a preliminary evaluation of the need for a criteria document on this issue. NIOSH realizes it is a complex subject and is trying to find out what unpublished data is available and what format a document should take. The "definition of a fiber" question is a big one, which leads to further concern that all mineral fibers could be "lumped" into one category unless information is available that they shouldn't. Mr. Doak urged us to submit a letter of information regarding our work, even if final results or conclusions are not available. I believe we should do this if Vaughn is agreeable. Content of the letter can be discussed if we decide to do it. The comment period has been extended until May 29. T. G. Grumbles dlj cc: VPSAG LIST A. M. Nielsen, J. R. Roheim, Diana Fenton, Lee Matheson, Curt ElsikAustin W. L. McClain vvv 000012925