Document m2r7gw8nq2L2RBO38gkwNo1b

PLAINTIFF'S EXHIBIT Manheim, Pa. OIVISION tnt LOCATION TO: Mr. Paul Lee date.- September 20, 1976 SUBJECT: Dear Paul: Attached is a marked up copy of a work practice write-up originally prepared by Ron Moalli several years ago for Dust Control in Brake Service Centers. This has been worked over several times to incorporate up-to-date input and the ideas of others and represents at this time what I consider to be the best procedure to recommend to anyone requesting information on airborne asbestos dust control in brake service work. Please reviev; this promptly and call me to discuss any ideas you may have for improvement or to advise that it is ok as far as you are concerned to circulate this as is. Thanks for your cooperation. -.t-' I. H. Weaver grb att. cc: Messrs. E. W. Drislane, FMSI J. H. Marsh MAR 000470 ASBESTOS DUST CONTROL IN DRAKE SERVICE CENTERS INTRODUCTION Host friction materials in use today contain about DOS to 60% asbestos fiber. Uany cuburf,ii<Ijliln>i iniUn.H 11o1 have-Hbu .bufrsaoo auVnrtilute- has been frnimi-cveTT,,lhoug h Lh .v a j-caase .rPr*r?`P" rw7 rninyyn mn. Today, a groat deal of publicity has been given to the fact that when inhaled f?{~iiha v r r 'i r 'i" '"r i asbes to.s^ ma.y be injurious to your health. When incorporated into brake linings, the asbestos fiber is "locked" into a matrix of other materials and presents little hazard. Furthermore, studies have shown that as brake linings wear, tbe/product of that wear is no longer recognizable, physically or chemically, as asbestos dust. ThaiT--ifinrn, ~ha <*sSy problems that arise .in fejje brake service areas of garages * ore tho/o of precaution and good housekeeping. HiL Jj^ji+dsAi PRECAUTIONS TO BE FOLLOWED BY BRAKE SERVICE SHOPS If it is assumed that there is free asbestos dust brake service shops capable of being made airborne, and ^precautionary measures arc taken on this basis, problemjof asbestos ausc should be essentially eliminated. r. V* PERSONAL X. Use coveralls %s protective outer clothing. This is done quite.frequently by mechanics to save wear and tear on , their personal clothing, but if this suggestion is considered as related to asbestos fibers, it would tend to eliminate the transport of any fiber-to a mechanic's home or outside of the brake service shop. The coveralls should be laundered frequently, a*<L -t&XL cLnJU aJ&JI AAA1 i 2^ Develop*good personal hygiene practices. Washing thoroughly before eating will prevent the ingestatfion of any foreign matter. Food should not be stored or eaten in the work area. 3. It is u well-published fact that smoking is injurious to your health. Whan coupled with asbestos dust, problems are accentuated.. Do not smoke. MAR 000471 THE BRAKE SERVICE SHOP X. Keep the entire area dust free by utilizing a vacuum cleaner and^criodic floor v/ashings. Particular attention should be paid to window lodges/ frames, overhead lights, girders, rafters or any inaccessible place that will collect dust. This should improve working conditions and mechanics' morale. NEVER use an air hose or any other method that would ^tend- to cause the. dust to become airborne. This included sweeping with a broom. If it is'deemed necessary' to sweep the floors, make sure ktewt- a sweeping compound /'is used to minimize the dust. . kiuzu 2 Vacuum cldaner^should be in good condition, without leaks, andvcapable of screening out the smallest of dust particles. BRAKE SERVICE WORK 1. When removing the drums or disc brake rotors, place each down carefully so that as much of the dust as possible is contained. For drums, the open end should be placed upward 2* Remove all parts necessary, including the shoe and lining assembly and place carefully alongside of each drum/rotor. Again, handle carefully so as not to cause any airborne dust. 2* Vacuum each backing plate and drum/rotor with an attachment that will provide the greatest amount of suction (such as the radiator cleaner attachment as used in the home). Repeat the procedure with an attachment that is used for dusting. This usually has bristles or a brush that will . loosen the dust partiqles and draw them into the vacuum. Repeat the procedure for each wheel followed by a general vacuuming of the floor in the general work area. NEVER ' blow dust away with an air hose. The vacuuming procedure should not take long fej--ic and.eliminate most airborne dust, creating better working/conditions. Make sure that the drum/rotor is vacuumed along with the ancillary parts. KaU 4* Recondition, repair or replace parts of the hydraulic system.. 5# Lightly sand the bosses on the backing plates or the .appropriate matal-to-metal contact points of the disc brake* Lubricate those points* * ' * . .* MAR 000472 TJ' $t Remove the newly relincd brake shoes from their box and return the used shoes into the same box, being careful not to disturb Wfee dust created by fetae- wear of the brako Jn<i' ^ 7. brake shoe and lining assemblies received ^g7air-t4sg- rxij.'jjjrirj for passbngcr cars and light trucks need not bo ground or "arced," flwm areftfi*iBd tmeker cam or contour ground /at' tho=-faCTbogy, * (a) for drum brakes up to .030" oversize in diameter, use the standard thickness lined brake shoe without further grinding. (b) for brake drums .030" and over, tifcfe oversize thickness lined, brake shoe will fit properly without further grinding. ,,^ ' /V' If grinding is necessary (as may^be the case of heavier truck shoes), use only a grinding apparatus which is adequately equipped to collect^ dust tha-fe--may--be generated. This is very important and, if a doubt exists, the equip ment manufacturer should be consulted concerning the dust collection system^n. 8. If the drum is turned, do not use dn air hose to blow out the metal chips. Carefully remove the drum from the lathe, turn over to empty the loose chips and wipe the surface with a clean cloth moistened with denatured alcohol. 9. Reline the vehicle in the normal manner. You will find that this procedure will not increase the time' j required to reline a'vehicle* if the operations are organized S properly. Working conditions for all concerned will bc/'pleasant G'T - as well as--surrounding's. <n the brake service areas. Ic should enhance the feeling in the mechanic that should make * him better organized with respect to his tools and procedures to be followed. Remember, the air hose should never be used around brake service work. Even though studies have shown that only 2-31 of the by-products of brake lining\rcay be in the form of asbestos fiber and the fibers in the brake linings are icked in", good.practiced eliminate all}.dust problems. <rjxht*n*\~ dlV--- MAR 000473