Document 0XZY2wQQ2OgzMR9MapRDdyLd

MATERIALS STANDARDS IKS' As. October 22, 1976 TO: Asbestos Study Committee SUBJECT: Recommended procedures for reducing asbestos dust during brake servicing On September 27, 1976 I forwarded a write-up to Asbestos Study Committee members relative to procedures that night be followed in brake service areas to minimize the problems with asbestos dust. This write-up was made about two years ago and had been reviewed by Mr. leaver, of Raybestos Manhattan, Inc. and the writer in order to up-date it. However, in the last review Mr. Paul Lee of Raybestos suggested "Recommended Procedures for Reducing Asbestos Dust during Brake Servicing." A copy is enclosed. Mr. Lee, and Mr. Weaver concurs, that this "Recommended Procedures for Reducing Asbestos Dust during Brake Servicing" is more concise and to the point as concerns procedures to be used in brake service areas. It is also more in harmony with the NIOSR recommendations. It is suggested that the Institute endorse such a write-up, or review the existing draft procedures that might be recommended`to brake service"shops when working with asbestos`containing brake linings. I suggest that you review this one page write-up and compare it with the earlier write-up and perhaps review it along side of the N10SH recommendations. The Institute would like to prepare a final write-up in this area that could be used for distribution when questions are received from the news media and others interested in the asbestos problem. E. V. Drislane Executive Director P-CMSI* 0C37 U,IC7I0N MATERIALS STANDARDS INSTITUTE, INC., -210 ROUTE 4, PARAtfJS, 4. C7 BULLETIN NO. 5 6 "I October 12, 1976 COIOTROL OF AIR30RNE AS3EST0S CONCENTRATIONS - IN THE WORKPLACE -- INDUSTRIAL TYPE VACUUM CLEANERS Over the past many months, without de-emphasis on problems in the Factory area, those in favor of stringent regulations on the use of asbestos have targeted friction materials servicing--particularly brake lining service-- as a potentially hazardous area. Technical papers in this area have not based observations on the QSHA standard's 8 hour time weighted average for fibers greater than 5 microns in length. Most papers have emphasized peak concentrations (as blowing brake lining dust from a used brake awaiting reline) and the fibers shorter than 5 microns in length. Based on discussions at the Asbestos Information Association meeting in September, efficient vacuum cleaning systems should be of help not only in the factory but in the brake service area. I have, therefore, enclosed sales literature from two manufacturers, along with the NIOSH (National Institute of Occupational Safety and Health) recommended procedures for asbestos brake and clutch servicing. Before distributing this information, I reviewed this data with Mr. 1. H. Weaver, acting Chairman of our Asbestos Study Committee, to be sure this information was worthwhile. He concurred that the following information was worthy of distribution to the membership: 1. N!OSH'Recommended (Interim) Procedures for Asbestos Brake and Clutch Servicing . 2. NiLFISK literature 2.1 NILFISK absolute filter 2.2 NILFISK manometer 2.3 Dust free disoosal 3. TEMPO Brake and Clutch Service Vacuum This literature is being enclosed (one copy to each member) with the mailing to: BVD/erc E. W. Drislane Executive Director cc-Active Members Regional Members (Active Dues Level) Asbestos Study Committee recommitted (imterim) procedures tor ASBESTOS BRAKE A'T> CLUTCH SERVICING Tne National Institute for Occupational Safety and Health (NIOSH) has research underlay concerning dust exposures during brake and clutch servicing. Due to preliminary data demonstrating significant asbestos exposures during presently used brake and clutch servicing techniques, KIOSK has reviewed alternate techniques whereby asbestos exposures are reduced. The following are interim procedures recommended by KIOSK to minimi to dust exposures. 1. If possible, an area shall be designated for all brake and clutch repairs. Entrances into this area shall be posted with as asbestos exposure warning sign as follows: Asbestos Dust Hazard Avoid Breathing Dus: Wear Assigned Protective Equipment Do- Hot Remain in Area Unless Your Work Requires It Breathing Asbestos Dust Hay Cause Asbestosis and Cancer 2. During brake servicing, an air purifying respirator, either single use er with replaceable particulate filter(s), a6 approved by the Mining Enforccmen; and Safety Administration (formerly Bureau of Mines) or KIOSK, shall be worn during all procedures starting with -the removal of the wheels and including Reassembly. During manual clutch servicing, such a respirator shall be worn during removal and cleaning of the clutch, pressure place and housing assembly and during instal lation of the new clutch assembly. B. Dust shall first be cleaned from brake drums, brake backing plates, brake assemblies and clutch assemblies using an industrial type vacuus cleaner equipped with a high efficiency filter system (>992 efficiency for 0.3 ya diameter aerosols). After vacuum cleaning, any remaining dust shall be removed using a rag soaked in water and wrung until nearly dry. Dnocr no circumstances shall compressed air or dry brushing be used for cleaning. 4. During arcing end riveting operations, n approved respirator, as described in (2) above, shall be worn. Grinding (arcing) machines shall be provided with local exhaust ventilation such that worker exposures are maintained at least below the 1976 OSHA asbestos standard (2$ CFR 1910.1001).* At a minimus, the dust bag of the arcing machine shall be removed and replaced with the hose of the high efficiency industrial vacuta described In (3) above. -2- 5. Industrial vacuum dcsncr bags containing asbestos dust and cloths used for viping brake and clutch assemblies shall be sealed in plastic bogs and labeled with Che following warning label printed in letters of sufficient size and contrast to be readily visible and legible; Caution Contains Asbestos Fibers Avoid breathing Dust Breathing Asbestos Dust Kay Cause Asbescosis and Cancer All asbestos waste shall be disposed of in accordance with the CSKA asbestos regulation, 29 CFR 1910.1001(h). During removal of \*acuic bags, an approved respirator, as described In (2) above, shall be vom. 6. All floor cleaning in areas where brake* and clutches are repaired shall be done with the high-efficiency industrial vacuum cleaner as described in (3) above. Grinding (arcing) machines shall also he cleaned with such a vacuum cleaner and.eny remaining dust wiped with a damp cloth. An approved respirator, as described in (2) above, shall be used during this cleaning. 7. Although adherence to the above procedures should minimize any contamination of work clothing, it is required that the appropriate portions of the 05HA regulations on asbestos (29 CTR 1910.1001(d), (3 and 4)) concerning special clothing, change rooms, etc. be followed. K07E: Strict adherence to the above procedures should minimize exposures to mechanics during brake and clutch servicing. These are interim recom mendations and are subject to revision pending results of ongoing KIOSK research. * Section 1910.1001 of the Code of Federal Regulations was formerly Section 1910.93a. This change was noted in the Federal Register, May 28, 1975. Prepared By Division of Field Studies and Clinical Investigations National Institute for Occupational Safety and Health Cincinnati, Ohio