Document aJ08Dp43aB8Q16yB6vENO3pX9

October 24* 1*974 Hr. E. h. Pcnner, Director Technical Eclatlone Environmental Affairs Dept. .JoftpS'-fcanviXle Cory. P. 0. Box. 51C6 Denver, Colo. 80217 Deer Ed; Attached is copy of revised draft of the Asbestos Friction fiaterials Horfc fractiees and e sex*** up copy of the original to indicate changes, all of etoiefc X consider siaar. Best regards* 1. H. Heaver v attach. cc-Heecrs. J. Harsh E. Drlslene ^ C. Clarice M PFMSf- 0C35 i WV-06035 .levtsec Keccsmcndcd *crk Practices for bscrs anc Fabricators of Asbestos friction liatorials +/ * This reeorrwndation of "Work Practices" is prepared by the Standards and Technical Ccsnittee of the Asbestos Information Association/fcorth America. The intent is to advise manufacturers and fabricators, who use asbestos friction materials, of Work Practices best suited to maintaining a working environment within the levels required by 1910.93a of the OSitt Standards (copy attached). 1. Asbestos Friction Material Products covered by this work practice recommendation: 1.1 Clutch Facings 1.2 Brake lining Segments 1.3 Brake Flocks l.L Disc rake Pads 1.5 Brake land F-aterials 1.6 Automatic Transmission Discs 2. Operations to which the recommended work practices may apply: 2.1 Clutch Assembly and Rebuilding Operations 2.2 Brake Assembly and Relining Operations 2.3 Automatic Transmission Assembly and Rebuilding Operations 3. Requirements of OSilA 1910.93a. 3.1 Tne Asbestos Standard (1910.93a) applies to ar.y manufacturingr fabrication or handling process or operations involving articles or materials composed wholly or in part cf asbestos fibre. 3.2 It is the employer`s responsibility to maintain "Exposure to airborne concen tration of asbestos fibresat or below the levels described in 191C.93&. Exposure levels say be controlled by isolation, enclosure, exhaust ventilation and dust collection. Standard 1910.93a does not limit the means used to maintain compliance. 3.3 Particular tools - All hand or power operated tools which may cause the release of asbestos fibre to become airborne at levels in excess of the standard, shall be .provided with exhaust ventilation. 3 .L Viet Methods - When practicable asbestos products shall be processed-wetted sufficiently to prevent emission of dust to the atmosphere. {Limited or not required where wetting would reduce end efficiency of the product.) 3.5 Protective Equipment and Clothing - Whenever it is necessary for employees to perform their normal work in an environment where airborne concentration of asbestos fibre exceeds the allowable level of Standard 1910.93a, the employer must provide respiratory protection and clothing in compliance with the standard. The employer must also provide change rooms and separate lockers for work clothes and street clothes. 3.6 Air Sampling and Monitoring - The employer is responsible as described in 1910,93a. 5 Storage end Handling -It is rtccmer.ofei tna asbestos-t be stores sn stale- containers. land!Ac; f aabestps-cy shall be cone m a manner to ftinisure genera Ctf aSOtOJ USA* 3.E Caution Signs and labels - The employer snail use caution signs and labels in accordance with provision of Standard 1910.9>a. L. Ixhaust and Dust Collection 5ysteas 1.1 Wherever exhaust and dust collection systems are used to attain concentrations ef airborne asbestos fibre belev: the levels allowed in Standard 1910.93a, the systems shall be inspected and cleaned at least weekly. 1.2 bssigr,, installation end maintenance of otnaust and dust collection systems shall be in accorcancc with American National Standard Fundamentals Govern ing esign and Operation cf local exhaust Systems (ATSI 29.2) or equivalent standard. oustkeeping in riar.ufaeturing and Fabrication Areas: .1 All surfaces, machinery, equipment, ate. shall be kept free of accumulation of asbestos dust, preferably* by vacuum clearing a- other method that vill prevent asbestos dust or fibre from becoming airborne. Vacuum cleaners should be equipped vdth a disposable collection bag and a microfilter. 3.2 Waste and scrap material, such as dust, chips, off-cuts, edge trinnings and broken pieces shall be placed in sealed containers in preparation for disposal Containers used to store or dispose of asbestos-containing materials shall be laoeiec in a manner to : r.plv with Standard 1910.93a. t. Ttecomcnded Procedures for lianu 'acturing and Fabrication Operations Involving ' Asbestos Friction :;aterials: C.l Wherever feasible, friction materials that are specially treated to reduce dust erission shbuld be used. 6.2 Materials should be removed from containers gently and handled with care to avoid unnecessary generation of airborne dust. Care should be taken not to disturb dust remaining in containers and packaging materials, Such dust aoould be removed by vacuum cleaning wherever feasible. to Wherever feasible, materials should be obtained from the manufacturer cut, machined and/or drilled to suit final requirements to avoid necessity for additional fabrication operations. i.L On large volume operations with fixed working points or machines, local exhaust systems should be installed in accordance with. American Kaiion&l Standard Awl 29.2 or equivalent standard, 6.5 When cutting, drilling, grinding or machining operations are of short duration portable dust eximust. units may be suitable. Vacuum cleaning equipment, ooiwtines may be adapted for this purpose, provided the filler system is of adequalc effieiency. t.B VTnsre st control oy naans of ideal esdh&ust is net feasible, fioadirg the w?ri; and the tooling with water or other liquid aay be effective i; suppres: ing dust emission* 6.7 Praipents and dust should be removed regularly, preferably by vacuus sethods, and jsust be disused of in accordance with paragraphs 5-2 and 5*3. 6,8 If surface dust is present on materials, it nay be necessary to remove it by wiping with a daap cloth or mop or by .vacuus cleaning with a brush head . attachment prior to performing secondary operations such as riveting, bonding, branding, inspection, etc. 4.9 Vfncre it is impractical to eort rol airborne dust by means of an exhaust system or 'ey vet processing, workers rust be protected by approved respirators and protective clothing. ,r*ercanal Protection 7.1 Develop good personal hygiene practices. Washing thoroughly before eating will prevent ingestion of foreign natter. Food should not be stored or eaten in the work area. 7.2 It is well documented that snoking is injurious tc your health. The ill effects of sacking ray be accentuated for those working where airborne asbestos dust ray be encountered. Smoking should be avoided). 7.? Use of approved respirators shall be mandatory.when required by CSKA Standard 1910,93a. Protective clothing shall be provided and worn wherever employees are exposed to ceiling levels exceeding those prescribed in Standard 1910.93a. Employee* must be given thorough instruction in proper use, care and maintenance of personal protection equipsaent. 7.1 Do person shall be assigned to perform any work for which respiratory protect ive equipoent is heeded unless he has been medically examined and determined 7.5 Care should be taken to mininise dust generation and transfer of dust to the person or his clothing. Clothing not worn during working hours must be stored avey from contamination, and contaminated work clothing shall be specially handled to prevent exposure to asbestos dust, as prescribed "in Standard 1910.93&. Ur T keecswneed Work Practices for users and "kwaesrcrrs ei Asbestos Fristson Zlaterials 4ntroduflt'&nn This recoanendation of "Work Practices" is prepared by the Standards and Technical Ceszdttee of the Asbestos Information Association/North America, worr-tag-Tith the Qaeupet In"tP cfifftty-ai^^ai^h^partinent> - - r * ",rs"'- ^inV-^rr The inte'nt is to advise manufacturers and fabricators, vho use asbestos friction.ms^erials, in manners of v:orfc Practice best suited to two naintainin/^o working environmental &emaa*=sfisc within the levels required by 1910.93* of the OSHA Stanaards 1. Asbestos Friction material Products covered by this work practice recommendation; 1.1 Clutch Facings 1.2 Brake Lining Segments 1.4- Sise Brake Pads l.a Brake* Band Materials Automatic Transmission Lises appiy j WtfKK Operations vinoresn the reconnended work practices say 2.1 Clutch Assembly and Rebuilding Operations 2.2 Brake Assembly and Reliniiig Operations 2.3 Automatic Trar.sja.ss ion Assembly and Rebuilding Operations 2tk--rfreLd-^sBCrtly- sf Industrial and/or rrurtnrrtwr^qai-pggnt *3 Requirements of 05KA Standard 1910.<&& Tf-A**' 3.1 The Asbestos Standard (191C.93a}^fplies^to*,^35y<'manusturing, fabrication or handling process aifTv wholly or in part of asbestos' fibre i "* 3.2 It is the employer's responsibility to maintain "Exposure to airborne concentration of asbestos fibres" at or oelov the levels '^escribed ir. 1910.93a, Exposure levels jsay lie .controlled byy isolation, enclosure, exhaust ventilation and dust collection. Standard 1910.93a does not limit the means used to maintain compliance. 3.3 Particular tools - All hand or power operated tools which nay cause the release of asbestos fibre to become airborne at levels xin excess of the standard shall be provided with exhaust ventilati )iJ 3.A Wet Methods - When practicable asbestos frig* ion-mt t^^r:products^rH. shall be processec^iWettod sufficiently to prevent emission'to ^working atmosphere, (Limited or not required where wetting of the product would reduce end efficiency of t*at product.*) umck 3.5 Protective Equipment and Clothing - Afr-awfc-frirrr that it is necessary for employees to perform their normal work in an environ ment wherein the airborne concentration of asbestos fibre exceeds the allowable level of Standard 1910.93*, the employer cast provide s: \\<- respiratory protection and clothier in compliance with the standard. Tne employer suit also provide change rooms and separate lockers for work clothes and street clothes. 3.6 Air Sampling and Monitoring - The employer is responsible as Gescribed in 1910.93* . eF- 3.7 Storage and Handling - It is recopSended that asbestos-containing products be stored in sealed containers, s^c, Purlrffi r>cr te^e-af --iff products* <s hsm&isg shall be done in -a manner to wcatn, *^ir 1 oaM; artvnt of air borne asbestos dust. M (sJ^^x.c-lUkLrlt' X^/JUW\ /-Pi/' UMUOv*Vt*JLM W/tfau Exhaust ana' Dust Collection System*. ws& ww4?iw n? dftu. U **ti.l b'acnoaa exhaust and oust collection systems are used to attain concentrations of airborne asbestos fibre below the levels allowed in standard 1910.93&, the systems atooulrf be insoected and cleaned /*/o.9 3a. veKjy. ;*.;TirwcTi^ **j* **Ajwre*A* i.,2 *SiEe desigrv of exhaust and dust collection systems ftast^iatjUus ,>.*...-.^*1-1**-) nr^fl be in accordance with American National 5canbard jl t* y QtMy*n. O^ . Housekeeping, in1 Ilanutaeturing and Fabrication areas 5.1 All surfaces, machinery, equipment etc. shall be kept free of is? aceuailatior of asbestos dust, Unv ewatfas^a, preferable by vacuum cleaning Athens or other method that will prevent escestos dust or iibre from becoming airborne. Vacuum cleaners should be equippedVyith a disposable collection bag and a microfilter. 5.2 Waste and scrap material, such as dust, chips, off-cuts, edge iTimings and broken pieces shall be placed in sealed eontaiaer* in .preparation for disposal. *2? 5.3 Containers used to store or dispose of asbestos-containing materials shall be labeled in a banner to comply with standard 1910.93a. 6. Procedure recommendations for manufacturing and fabrication operations involving asbestos friction materials. 6.1 Wherever possible, friction materials that are specially treated to reduce dust e&issior, should be used. 6.2 Materials should be removed from containers gently and hsndled with care to avoid unnecessary generation of airborne dust. Care should be taken not to disturb dust remaining in containers and packaging materials. Such dust should be removed by vacuum cleaning wherever possible. 6.3 Whenever possible, materials should be obtained from the manufacturer eat, machined and/or drilled to salt final require ments to avoid necessity for additional fabrics!ionoperations, 6.i On large volume operations with fixed working point* or machines, local exhaust systems should be installed to accordance with American National Standard AKSI Z9.2 or equivalent. 6.5 Vnen cutting, drilling, grinding or machining operations are of short duration, portable dust exhaust units may be suitable. Vacuum cleaning equipment sometimes nay be adapted for this purpose, provided the filr system is of adequate efficiency. 6.6 Where dust control by naans of local exhaust is not feasible, flooding of the work end the tooling with water or other liquid may be effective in suppressing dust emission. 6.? ^Swarf^and dust should be removed regularly, preferably by vacuum methods, and disposed of in accordance with paragraphs 5.2 and 5.3 '- 6.S If surface dust is present on materials, it may be necessary to remove it by wiping with a damp cloth or mop or by vacuum cleaning with a brush head attashrent prior to performing secondary operations such as riveting, bonding, branding, inspection, etc. 6.9 where it .is impracticable1 to control air borne dust by means of an exhaust system or by wet processing, workers must be .protected by approved respirators and protective clothing. A i-C 7. Personal Protection. 7.1 Develop good persend, hygiene practices, hashing thoroughly before eating will prevent ingestion of foreign matter. Pood should not be stored or eaten in the work area. v'*7.2 It is well documented taat smoking is injurious to your "health. . * \ *vivherreevpled ^fitb-agboetos dust ^^aotetog should be avoidedi \ . 7,3 Dse of approved respirators should be gnsoureged ifhesever measurable a&rborne-sabcstos-duat-concentrations-exiat, -and-u&e-of / such""recpirascixs shall be mandator? vbanewr airborne fibre-Sigits A OVev exoeed. thoue'^csoii&b&d-to Standard 1910.93*. Protective clothing shall be provided and worn wherever employees are exposed to ceiling levels exceeding those prescribed to Standard 1910.93a. Employees aist be given thorough instruction to proper use, care and maintenance of personal protection equipoent. 7.t No person shall be assigned to perform any work for which respiratory protective equipment is needed unless he has been medically examined and determined fit. 7.5 Care sftoulc oe take* to isLise rest *=* transfrr of dust to the person or his clothing. Clet&vs net wwv. during workinc hours oust be stored away from eontaxination, and contaminated vork clothing shall be specially handled to prevent exposure to asbestos dust*