Document MJrwG2ZqOdknBwb2pEqr26vKL

FILE NAME Brakes BRK DATE 1976 Apr 6 DOC BRK173 DOCUMENT DESCRIPTION Memo with Asbestos Sampling Results TE LY ' fl -' Mr. J. F. Ballew Building70-108A INSTITUTE PLANT Jr. Ms. B. J. Mitchell Mr. J. G. Perkins Mr. F. Williams April 6 1976 I.B A Industrial Hygiene Hygiene You have asked that measurements be made of personnel exposure co airborne asbestos fibers while weighing dishes are being prepared for residue analyses Our records show that a similar measurement was made in Specifications Laboratory Room 205 March 10 1975 and was reported to de slightly above threshold limit value TLV Three determinations have recently been made by fiber filter samplers worn by employees while preparing sample dishes Analytical Laboratory Room 108. follows The results of these samplings count on in the are as Date 12/22/75 1/12/76 3/1/76 Employee C. W. Devers D. DeLuca J. O. Good Fiber Count Air 4.9 47.6 7.7 and We airborne observed dust was samplings each of these samplings not visible in either to De similax similax in inscance The LV technique technique for asbes- greater tos dust exposure is currently 5 fibers micrometers per cc of air as a time weighted average TWA exceed 10 fibers greater than 5 micrometers in will July the TLV be reduced to 2 fibers as an OSHA than 5 and a ceiling value value length As of allowable limit in length not to to 1 1976 1976 1976 1976 1976 This job task is only infrequently performed and it is unlikely that that the the TLV as TWA would ever be exceeded Our measurements however, ceiling level can be excessive We therefore recommend that show work involving preparation of samplesample dishes with asbestos fibers fibers be performed within an exhaustexhaust ventilated ; i i on a IN\,ft - ^' an? OO Fra yi Fra Fra Fra Fra Fra Fra jesie jesie Fra jesie Fra H. H. H. H. jesie Frazier Frazier Frazier UCC 008858 Renee ene