Document gRGKzMdDdqeyqRLbrO6y8JQ3

FILE NAME: Ford (FD) DATE: 1976 Mar 19 DOC#: FD133 DOCUMENT DESCRIPTION: Minutes of CDC & NIOSH Meeting on Occupational Exposure to Asbestos During Brake and Clutch Servicing DEPARTM ENT OF H EALTH. EDUCATION, AND WELFA PUBLIC H EALTH SE R V IC E 0 CENTER POP DISEASE CONTROL L.L. May 13, 197S A, tJ NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY ANO HEALTH U S . POST OFFICE ANO COURTHOUSE CINCINNATI, OHIO 45202 ' Boom 532 Boger Wabeke Ford Motor Company Central Medical Services Bldg. r- ^1 \ ' 3001 Miller Bead Dearborn, Michigan 48121 Dear Sir: Please find attached the minutes to^the March 19, 1976 meeting on "Occupational Exposure to- Asbestos yDust During Brake and Clutch Servicing". Xf you have comments ^corrections, please contact me at (513) 684-3191. ----^ Sincerely yours, * 717 - John M. Dement Assistant Chief Industrial Hygiene Section attachment 008182 PRODUCED BY FORD D e p a r t m e n t of Health, Education, and Welfare CDC, NIOSH Minutes of Meeting on Occupational Exposure to Asbestos Dust During Brake and Clutch Servicing Cincinnati, Ohio March 19, 1976 ' Minutes Prepared By John Dement Attendees . See Attachment Proceedings C. lobby cr.lt. ionceruing asbestos fiber L f r further epidemiological studies 21 to explore the research potential r studies with respect to isbestos disease etiology ( 3 ) " OSH should take to assu" ae then asked Dr. asbestos exposures tu gar-g- - ^asbestos exposures to garage workers. ,, sunBttari2e current knowledge concerni .g - d ^ * d heaUh ^ .... ff briefly summarized environmental and " ^ ^ ^ y o r k Auto Dr. Selikoff brierly s w TM " ,,nit:ed Auto Workers and the New ducted with Local 259 of the tudies demonstrated peak asbesto mobile Dealers Association T h . TM determined by the fiber ejrposures of 0.5 to 35 Us electron microscopic tech- ^ OSHA phase contrast count ng m * f he flbers ,,ere shorter t an niques, it was shown that 80 to repair uorkers with 10 *<> in length. Medical examinations * tlal nuber with x-ray and pul- years of exposure demonstrate Dr Selikof estimated that more than monary function abnormality . 0 exposed to friction product e-r one million workers are ^ that in 1920 there *ppr** * "e -- . - u *i. 008183 PRODUCED BY FORD had increased to approximately 130 million. Dr. George Wright, industrial medical consultant, pointed out that many garage mechanics perform grinding operations in addition to cleaning of the brake wear dusts. These workers would be exposed to longer fibers and thus would be expected to demonstrate the full spectrum of asbestos related diseases. Dr. Wright suggested the following points be consi dered with respect to future studies of brake mechanics: 1) A cohort should be established exposed solely to the dust released from "used" brakes by blowing or brushing. These dusts contain broken down fibers, resins, etc. Fibers present in these dusts are largely shorter than 5 pm with some proportion altered to an amorphous fiber. Such a study, if properly conducted, could answer questions concerning the significance of exposures to brake wear dusts and the biological significance of short versus long asbestos fibers. 2) Since only chrysotile has been used for asbestos brake linings, a study of brake mechanics would provide an opportunity to study industrial (as opposed to mining and milling) chrysotile exposures with respect to the development of mesothelioma. Dr. Wright suggested that low priority be given to anything other than a mesothelioma survey. 3) A careful, sophisticated study of brake cleaning methods and work practices should be conducted to determine the optimum work practices for reducing exposures. ' Dr. Wright stated that in his opinion the chances of 'designing a study to determine does--response relationships is minimal. Dr. Craft asked the group to consider the possibility of defining a suitable cohort exposed solely to brake lining wear dust (short fibers) for purposes of health studies. Mr. John Marsh, Raybestos-Manhattan Incorporated, presented data showing the number of workers in various types of garages. These data were as follows: Garage Type Service Stations Independent Garages New Car Shops Fleet Shops Approx. V Facilities 195,000 108,000 39,000 21,000 A v . if necnauLcsPer Shop 2.5 2.7 5.7 7.6 jm Oi A x - ir>.c Work Performed 50Z 30Z 18Z 1-2Z -2- 008184 produced by ford _ k n-esented data concerning asbestos fiber expo- Kr. Lou Reff i J -c- Penney, P*. - - p enney. Mr. Reff indicated sure, 1 360 .=11161 " f " . *.ro flb.r exposure (phase that, using a 2 V'Y,. obtained. Snail exposaxes could be detected contrast counts) " "" b H; indicated that sampling of the ambient S f o S r . of^the*garage Lclllty - 1=== "bteln b.chground levels. 0ohn Benent of HIOSH average asbestos to ga S weighted-average exposure contrast counts) eve However, exposures up to grinding new generally below 0.2 fibers/cc (.phase ^ b air blowlng techniques. fibers/cc were observed in one facility d ,, take these exposures R a t i o n for an epidemiologic study from'attendees concerning present i^t reu lining rlmdi - a " , ,, .... Delco-ltoraine, indicated thac radius gtlnd- Hessts. Jacoby and TbacUt > 1 co_ o t practice. Host rul ing 1 tha garage Sb0"" .." c ^ grinding" lining thus eliminating facturers are presently ^ this practice in garages. Dr. Selihoff addressed t h e " s f l b i u l f o f =h" s i ^ ` short fibers. He suggested the^posslb^ Large shop employees, unlclpal approximately six_large could provide a large and stable wor employees and taxj fleet w* studies of garage employees, Dr. Sel o force. 1 addition to^medical " V J dults, studies of other 2 3 S - l Inhalation ~perlmuca. John Harsh indicated that i`" " " associated it* W oaur" - " a_ ,, otous problem. Kaybestos-iunhactan to inlmine these lirj,,g bones in addition publishing ^ ^ r . r . l d 5r i o u s information pamphlets. . Chat the HIOSH Alert, issued on August 8, S i s f ^ S not^eached^more uss - a - --E S te"-` Dt. Selihoff closed his remarhs suggesting four areas of ccnsl by N10SH. lf H i- p rtr, fr-irtion product use including formulations fro. industry. -3- 008185 PRODUCED BY FORD 2) NIOSH should continue studies of exposures to asbestos fibers during brake rebuilding including determinations of peak and time-weightedaverage exposures. 3) A prevalance study including x-ray, pulmonary function and sputum ---- cytology should be conducted among a cohort 1000 garage workers. NIOSH should also conduct a six month feasibility study to determine^ an annrouriate cohort for" a r^^stectlv^jaaixallty Study ESuITFe defined. Tissue asbestos fiber burden studies should be considered. --- A) NIOSH should continue developing approaches to educate exposed workers. Dr Craft thanked the attendees for their participation in the meeting, and indicated that NIOSH would consider further research in this area' with respect to ongoing research, current study priorities and availa bility of resources. cc: All Attendees Dr. Finklea Ed Baier Dr. Wagoner Dr. T. Mancuso Angelo Ceflo -A- 008186 produced b y ford NAME D r . Craf t Denny Dobbin Paul Johnson J ohn Dement ' Richard Lemen Phil Bierbaum R. T. Bughes David Groch Clancy Wuellner Glen Jacoby Lon Thacker John E. Harsh Roger Wabeke George W. Wright Lou Raff Irving Selikoff William H. Krebbs ATTENDEES AFFILIATION Director, DSHEFS - NIOSB DSHEFS - NIOSH DSHEFS - NIOSH DSHEFS - NIOSH DSHEFS - NIOSH DSHEFS - NIOSH DPSE - NIOSH DBBS - NIOSH Delco Moraine Div., GMC Delco Moraine Div., GMC Delco Moraine Div., GMC 5 Raybestos-Manhattan, Inc. Ford Motor Co. Independent Consultant (a large part of JM) J. C. Penney Mount Sinai General Motors Corp. PHONE NUM3ER 513-684-3541 513-684-3255 513-684-3255 513-684-3191 513-684-2761 513-684-2325 513-684-2591 513-684-2622 513-445-4244 513-445-4413 513-445-415 203-371-0101 313-322-2630 303-733-6313 212-957-7625 212-876-1178 313-575-2791 008187 PRODUCED BY FORD