Document YymLzN2DKnB4Xn91RNevKaKn

+ .if 11* S4T. pi SAFETY -- MEASUREMENT AND CONTROL OF ASBESTOS DUST EXPOSURE ISSUED THIS PAGE REVISED STANOARO REAFFIRMED ENGINEERING STANDARD APRIL 1S73 OCT 19SS NOV 1SS4 S4T Paga 1 of 8 Tbt* standard metudes requirements of the Occupational Safety and Haaltfi Act of 1970 (OSHA) aa published in the Federal Register OSHA information is pnntod m red. 1. SCOPE 1.1 This standard present* the permissible asbestos dust exposure limits, methods of controlling asbestos dust exposures, special OSHA requirements for removal of asbestos insulation, respiratory protective equipment, and method of sampling asbestos dust concentrations in the work areas, it provides sufficient information to comply with OSHA and EPA regulations but guidance from the Du Pont Legal Dept (via the Departmental OSH Coordinator) should be sought whenever an interpretive problem arises. 1.2 An Asbestos Compliance Package can be obtained from the Occupational Health and Water Treatment group of ESD. Ref (1) contains extensive additional information. 1.3 A comprehensive book on asbestos removal and control has been published. Ref (14). It contains useful and detailed information on asbestos removal tech niques, monitoring, and disposal. Also included are checklists for removal jobs and sample specifications for contractors. The removal technique detailed in the book is called "negative air filtration" and involves the use of a portable, HEPA equipped powered exhaust unit. That technique is also explained in an Environmental Protec tion Agency report that has been reprinted under the title "Controlling Asbestos Contamination with Negative Air Filtration Systems." Ref (IS). The report contain* a de tailed operating procedure for asbestos removal and an evaluation form that would be useful in auditing the re moval job. It also contains much of the same information in the more expensive book identified as Ref (14). 2. GENERAL 2.1 Asbestosia and cancer are associated with over exposure to asbestos. Historically, the incidence of these diseases has been significantly higher among asbestos workers than among the general population. Cigarette smoking greatly increases the incidence of respiratory cancers arising from exposure to asbestos. Asbestosexposed person* who smoke have a 53-fold increase in risk from lung cancer over nonsmokers. Ref (2). 2.2 Principal potential sources of exposure to airborne asbestos dust in Company operations are: a. Removing old asbestos-containing insulation from lines and vessels, including gaskets on hightemperature lines b. Removing, handling, and laundering of asbestos-contaminated clothing C. Cutting new or removing weathered asbestos cement (Transite) siding, roofing, pipe, etc. or Haveg pipe and equipment d. Maintenance and operation of machinery and vehicle brake linings . Opening boxes and removing new asbestos material* f. Handling asbestos materials used in production of Company products g. Repair of laboratory equipment with asbestos insulated heaters, e.g., gas chromatographs, lab ovens h. Cleaning and maintenance of vacuum systems for collection of asbestos fibers I. Asbestos welding blankets and cloths ]. Removing old asbestos floor tile end adhesive 2.3 Suitable nonasbestos substitutes should be used where practical and feasible whenever the use of asbestos-containing materials can release asbestos fibers. ESD can furnish information on asbestos substitutes. 2.4 Some materials containing bound asbestos fibers, e.g., Transite siding or roofing, are not hazardous dur ing normal use. Examples are: bonded compressed as bestos gaskets, asbestos roofing felt. Teflon* impregnated asbestos packing and fibrated asphalt cut back (mastic). These materials could become hazardous if asbestos fibers are released because of loss of binder or a physical action such as grinding. Supervision should inspect use of these materials to determine if respirators are needed. 2.5 A material which contains asbestos which might become airborne should be treated as asbestos unless it is determined that the asbestos present is not a potential health hazard. Tale, vermiculite, and other minerals are listed by Appendix 1 of Ref (1) as possibly containing asbestos. SUSCOMMir'EE VO 4C Vendors and merchandise designations are given to describe matenalt and may not include all acceptable products. Substitutions by suppliers are to be made only on approval of the local authority initiating the use of this standard mm rwS DOCUMENT $ rn PROPERTY OP 6__' OU PONT 0 NEMOURS ANO COMPANY 'HE 'EChNiCa*. NPORMATjON mat NOT BE uSEO NOR REPRODUCED WITHOUT Th PERMISSION OP Du *CnT DUP 1011058 DU 053100 S4T Fm 2 MEASUREMENT AND CONTROL OF ASSESTOS OUST EXPOSURE This Pafla Rev Qct IMS 3.1 Amosite, chrytotile, and tremolite aabeato* fiber* concentration* in air *ball not exceed an S-hour (and 12-hour) Acceptable Exposure Limit (AEL) of 8.5 fiber* longer than S micrometer* per cm3. 3.2 The type* of atbesto* occurring in Du Pont are amosite, chryaotile, and tremolite, a potential contami nant in talc. 3.3 Since crocidolite a*be*tos i* not known to be preaent in Du Pont, it* toxicity wa* not conaidered in setting the AEL. (Lice the ACGIH TLV 8-hour TWA of 0.2 fiber* longer than 5 micrometer* per cm3.) If encountered in Du Pont, Haskell Laboratory ahould be contacted. 3.4 At no time may exposure to airborne fiber* concentration exceed a ceiling of 10 fiber* longer than S micrometer* per cm3. 4.2.3 Caution sign* and label* (hall be used per aection 12. 4.2.4 No asbestos cement, mortar, etc, or similar material containing dry friable asbestos fiber* shall be removed from bags, cartons, or other container* in which they are shipped without being either wetted, en closed, or ventilated to effectively prevent the release of asbestos fibers in excess of the limits in section 3. 4.3 Tools Usod on Asbostos 4.3.1 Avoid sawing where possible; knife cutting is preferred. 4.3.2 All hand-operated and power-operated tools which may produce or release asbestos fibers in excess of exposure limits, i.e., saws, scores, abrasive wheels, and drills, shall be provided with a dust-collection system as specified in 4.1. 4. CONTROL OF ASBESTOS OUSTS 4.1 Engineering controls, auch a*, but not limited to. isolation, enclosure, exhaust ventilation, and dust collection shall be used to meet the exposure limits in section 3. 4.1.1 Local exhaust ventilation and dust collec tion systems shall be in accordance with ANSI Z9.2-1971, "Fundamentals Governing the Design and Operation of Local Exhaust Systems." 4.1.2 Additional information on the design of ventilation systems is contained in H1U, H3U, DH1L, DG20D, and Ref a) and (6). 4.2 Handling Asbestos 4.2.1 Insofar as practical, aabeato*-containing materials shall be handled, mixed, applied, removed, cut, scored, or otherwise worked in a wet stale sufficient to prevent the emission of airborne fibers in excess of the exposure limits in sectioaS^ 4.3.3 Ail asbestos-cutting operations should be isolated to minimise unauthorised access. This can be a temporary area for nonroutine operations with barri cade* and signs per section 12. Routine work should be isolated in a properly posted separate work area. 4.4 Removal of Aitsstoi Insulation 4.4.1 If the composition of the material is un known, it shall be treated as being asbestos. For use of labels to identify nonasbestos insulation, see SN218P. 4.4.2 Proper respirators (per section 5) and spe cial protective clothing (per section 9) shall be provided all employees engaged in removal or demolition of asbestos insulation or covering. Atmosphere supplying respirator* are required except where it has clearly been demonstrated that the wet method is effective and moni toring hat shown that airborne concentrations of as bestos on the job will not exceed the OSHA protection factor of the air purifying respirator. Respirator selec tion information is provided in section 5. 4.2.2 HoiMOhooping. All external surfaces shall be maintained free of asbestos fibers if, with their dis persion, there would be an excessive concentration. .0 All areas where asbestos is routinely handled shall have a vacuum cleanup system. This can be a system of hoses connected to a central vacuum system designed in accordance with 4.1.1. Vacuum hose* should be inspected periodically to ensure they are free of loose asbestos fibers. These hoses should be appropriately isolated, i.e., placed in a sealed, labeled bag. b. No dry sweeping shall be performed. Com pressed air is not to be used for cleanup. 4.4.2.1 At a minimum, air-purifying respira tors (5.3) and special clothing shall be worn during the removal of asbestos insulation. Many plants have found disposable dust masks ($3.1) (N10SH approved for asbestos) and disposable paper clothing satisfactory (5.3.2). . This requirement doe* not apply to removal of insulation, fabricated and protected to withstand re peated removal and reinstallation for equipment mainte nance or other reasons, providing the technique* employed have been demonstrated to maintain asbestos concentrations within exposure limits of section 3. Portions pnntsc in rad mast OSHA regulations. Section tStO tOOt (tormsrty 93*1 6govvov ana + 140 S4T, p2 ( DU 053101 + 14% S4T. p3 This Pass Rsv Oct 1968 MEASUREMENT AND CONTROL OF ASBESTOS OUST EXPOSURE S4T Pag* 3 b. The dothinf requirement doe* not apply to removal for maintenance or alteration* when the wet method i* u*ed and monitoring haa ihown the precau tion* maintain asbestos concentration* within the expo*ure limit of (ection 3. 4.4.3 The work area *hall be barricaded and cau tion sign* shall be posted a* described in section 12 at approaches to area* where asbestos materials are being handled. 4.4.4 Insofar as practical, all asbestos materials shall be thoroughly wetted and steps taken to ensure that they remain wet until placed in sealed impermeable bag* or other impermeable container* labeled per section 12. The most effective approach to wetting involves one em ployee applying a fine continuous mist of water and surfactant while another employee slowly expose* the asbestos. Contaminated run-off should be avoided and collected. Wetting may have to be suspended on outside operations, e.g., when temperatures are below 0C. If asbestos cannot be wetted due to freezing temperatures, or other conditions, it should, to the extent possible, be removed as unit sections. The use of a surfactant in spray water enhance* fibers control by approximately 15 per cent and should be considered for asbestos. Suitable sur factant supplier* include: Aquatrols Corporation of America 1400 Suckle Highway Pennsauken, >J 06110 (Product: Asbesto Wet) Occidental Chemical Company Institutional Division Box 196 Lathop, CA 9S330 Target Chemical Company 1266 N. 10th Street San Jose, CA 9S112 Vineland Chemical Company Box 74S ___ Vineland, PO 66344 Caution: Area work surface* (floors, etc) may be very slippery after surfactant use. 4.4.5 Support fasteners shall be removed with care. Handle asbestos-containing materials in such a manner to minimize generation of airborne asbesto* fiber*. Do not drop. 4.4.7 Maintain good housekeeping. Vacuum equipment with high efficiency filtration meeting re quirements of 4.1.1 shall be used to prevent loose accu mulations of fragments or fibers (or both). 8. RESPIRATORY EQUIPMENT 8.1 Respiratory protection shall be provided to all per sonnel in areas where exposure limits in section 3 may be exceeded or where asbestos is being removed (see 4.4.2.1). Respiratory protection can be used to meet ex posure limit* only under the following conditions: During the time necessary to install engineer ing control* per 4.1. Written plans for the installation of engineering controls or reasons why they are not feasible should be available for routine operations exceeding the limits. b. When engineering controls are not technically feasible or are insufficient to meet the limit* in section 3. C. In emergencies. 8.2 If respirator* are required, a written respirator program shall be prepared. 8.2.1 Refer to S2H for further guidance in estab lishing a respirator program. " 8.2.2 All respirator* should be MOSH/MSHA ap proved for use with asbestos. 8.3 Air-purifying (mechanical filter-type) respirators shall be used when the TWA or ceiling concentrations are reasonably expected to exceed no more than 10 times the limits in section 3. 8.3.1 Although OSHA permits use of both cellulosic and elastomeric half-mask air-purifying respirators for up to 16 time* the limits in section 3, the ceilulosic disposable type* should not be used within Du Pont for more than 5 time* the limits unless research has shown them to provide higher protection factor*. At this time, only the 3M brand models 8710,9906, and 9910 have been shown during asbesto* workplace protection factor studies to provide a good enough fit to be assigned a protection factor of 16, Ref (16). 8.4 Atmosphere supplying (Type "C" continuous flow or pressure-demand supplied-air respirators. Table IB of S2H) respirators shall be used when the TWA or ceil ing concentrations are reasonably expected to exceed 16 time* the limits in section 3. 4.4.6 Removed asbestos materials shall not be 8.6 Powered air-purifying respirator* are seldom used allowed to lie about the work area, but shall be immedi in Du Pont. Contact the Departmental OSH Coordinator ately sealed in bags. or Haskell Laboratory for guidance before such use. Portions pnntsd in rtd msst OSHA regulations. Ssction 1910 1001 (tormsrty 93a) tor *S sections sscspt S,2 wtHdt is dsscitwd by Ssction 1910 134 mm DUP 1011060 DU 053102 $4T Papa * MEASUREMENT AND CONTROL OF ASEESTOS OUST EXPOSURE Thl* Pogo Boy Qct 1666 6. IDENTIFICATION OF ASEESTOS IN MATERIALS SUSPECTED OF CONTAINING ASEESTOS #1 Flald Methods. Than U no reliable field method for confirming the absence of asbestos in materia)* im peded of containing a*be*to*. Vitual examination! alone is not sufficient to confirm the absence of asbestos. 5.1.1 A flarno tost Ref (9), using a propane torch can be used to screen samples. This test provide* reliable indications of the presence of asbestos, but does not provide * reliable indication of the absence of asbestos. with reasonable accuracy. Samples for determination of both t-hour time-weighted averagr and ceiling concen trations shall be taken. 7.3.1 Ceiling samples shall be taken for those short tasks for which highest exposure is expected. Ceil ing samples for OSHA compliance testing should be taken for IS minutes. Short-term samples may also be taken for shorter or longer periods (duration of a given task) for investigative purposes. 7.4 Procedure* S.2 Laboratory Mathods. Polarizing microscopic ex amination can be used to determine the presence or ab sence of asbestos in most cases. When results of the microscopic examination are inconclusive, x-ray diffrac tion. staining and scanning electron microscope will proside reliable results. 6.2.1 Samples (approximately 1 gram) can be sent to Haskell Lab (7.4.1) for microscopic examination. Haskell Lab will arrange for suitable analysis if the re sults of the microscopic examination are inconclusive. 6.2.2 Samples can be sent to the Analytical and Physical Measurement Group, PPD, Experimental Station-for x-ray diffraction analysis. 6.2.3 The K2 test developed by NIOSH for screen ing asbestos is not recommended because it is unreliable and uses corrosive HF, Ref (2). 7. MONITORING 7.1 Monitoring is required where employees may be exposed to asbestos dust from work-related activity to determine the employee's exposure. 7.1.1 In the case of bonded asbestos materials, if there is evidence of dust, area monitoring should be performed. 7.4.1 Method* of sampling asbestos fibers in air are given in Ref (3). Sampling procedures should be re viewed with the laboraory which will count the fibers prior to sampling to help ensure proper techniques are used. The sample should be taken at a rate of 1.5 to 2 liters per minute. The filter face should be positioned so that fibers will not settle on it. 7.4.2 When sampling atmosphere* containing as bestos fibers with low levels of other dusts: a. Where exposures are expected to be below 2 fibers per cm2, sample for 2 to 6 hours. .......... .b. Where exposures are expected to be above 2, but less than 5 fibers per cm2, sample for 45 minutes to 4 hours. C. Where exposure* are expected'to be higher than 5 fibers per cm2, sample for 30 minutes to 2 hours, depending upon experience and consultation with the laboratory which will count the fibers. 7.4.3 Where sampling atmospheres containing asbestos fibers with high levels of other dusts, sample times will vary depending upon the amount of other dusts present. The laboratory which will count the fibers should be consulted to obtain approximate sample times. 7.2 Typo* of Monitoring _ 7.2.1 Personal Monitoring. Sample* shall be taken from the breathing tone of employees. 7.2.2 Envtronmontal (Aroa) Monitoring. These samples are taken from a fixed location where asbestos fibers may be released. Such sampling may be useful in determining the need for local ventilation of asbestos releasing tools. The sampling filter is placed close to the area representative of the breathing zone of employees. 7.4.4 Equipment. All sampling must be done on membrane filters of 0.6 micrometers porosity mounted in an open-faced filter holder. The Millipore cellulose acetate 0.8 micrometer filter, catalog number MAWP 637A0, is recommended. Particulate sampling equip ment is described in S13T, section 10. 7.4.5 Analysis must be conducted by a qualified laboratory. Completed sample* are placed in a mailing tube, sealed, and sent to a qualified laboratory with 2 copies of the sampling record. 7.3 Sampling frequency and patterns shall be such that a. It is recommended that an unexposed filter samples represent the level of exposure of employees be included with each batch of sample* as a blank. Portion* printed in r#d moot OSHA regulations. Section 1910 1001 (formerly 93a) <janu> DUP 1011061 + 143 S4T, p4 ( + DU 053103 awiiwMiwaHlMiiaHiiiit WwwiffiiwwiiMiSiiw-aiwiiMPiiwBt'j ii iinwinnwi f MIC fBiwiifltiMiiMra^ + \T? 84T. pa TMs Rat* Rev Nov 1444 MIA4UMMINT AND CONTROL OR A4S89T09 OUST KXR04URI 44T Pape S All determinations ahall be made by tbe i filler method at 4M to 4MX (magnification) (4 aa objective) with pfcaae contrast illumination. All fibers meetingtbe proper aapeet ratio (3 to 1 length-todiameter) will be counted and reported aa aabesto*. C. A qualified laboratory: 4- All employees working in jobs which are exposed to airborne asbestos fiber concentrations of 4.1 fibers per cm1, or greater, of air 4-hour TWA. C. Those who during their Du Pont employ ment have previously worked in jobs with an exposure described in 4.1.1. E. I. du Pont de Nemours A Co Industrial Hygiene Section Haskell Laboratory CRAD Dept Newark, DE 19711 In addition to Haskell, other accredited laboratories are listed in tbe AIHA Journal. Employees should be notified of exposure monitoring results. Any employee exposed above tbe 4SHA limits [Ref (I)] shall be notified, in writing, within S days of tbe finding and of corrective action being taken. Notification is required even if employee was wearing protective equipment at tbe time of exposure. NV.f fcfrflMra fieri shall be maintained at least 34 years. Other record keeping requirements will gener ally require records be kept for longer periods. d. Those with a known off-plant asbestos exposure prior to or during employment at Du Pont. At time of employment and periodically thereafter, care should be taken to record any history of off-plant exposure to asbestos. . Those with an x-rmy showing changes of the type which are known to result from asbestos exposure. 4.9 "Guidelines for Physicians" [see Ref (S)[ contains additional information on interpretation and frequency of x-rays for asbestos-exposed employees. 9. CLOTHING AND CHANGC ROOMS 4.T Special clothing, such as disposable coveralls, heed covering, gloves, and foot covering, shall be required where exposures exceed the ceiling limit. Section 3, and during removal of asbestos insulation, see 4.4. All employees should be alert for potential heat stresa during work, based upon the special clothing selected and work area temperatures. 7.4.1 Employees and former employees shall have reasonable access to records which indicate the employee's own exposure to asbestos. 4.1.1 Contaminated clothing should be vacuumed or wiped with a wet rag before the clothing is removed. The respirator should be removed last. 7.7 Affected employees or their representatives shall be given reasonable opportunity to observe monitoring and review tbe results. 4. MUMCAL fiURVlILLANCfi 4.1 Msdcil KxnminntlOM. Preplacement, annual, and termination medical examinations shall be made available to smployees in aa occupation exposed to asbestos (as defined in 4.1.1 a through e). These exam inations shall include, as a minimum, a PA chest x-ray, medical history, and pulmonary function tests. 4.1.1 Each plant shall assure that all employees in the following categories receive the medical exam inations prescribed in 4.1; 4.2 Change rooms shall be provided for all employees working in jobs in which the exposure limits in section 3 are exceeded. 9.2.1 Separate etoshtug lockers or similar arrangements are required in those change rooms to pre vent contamination of street clothes from work clothing. 4.3 Laundering of asbestos-contaminated clothes must be done to prevent the release of asbestos fibers into the air. 9.3.1 Those Isauadering contaminated clothing shall be informed of the need to prevent release of asbes tos fibers. .9 3.2 Contaminated clothing shall be transported in sealed impermeable containers labeled per section 12. a. All employees working in jobs that require handling of asbestos which might become airborne (such as carpenters working with Transite, insulators, pipe fitters, and millwrights). 9.4 When maintenance is performed on changehouse air exhaust systems (fans, ducts, filters), personnel should be alert to the presence of airborne asbestos fibers and take appropriate precautions. Pontons prtntsd in rsd mass 06HA rsgUsStrs. Seaton 1110.1001 (tomurty Hal * semens amept M aMch is oomrad by Section liio.ns mm + DU 053104 DUP 1011062 S4T Pg 4 MEASUREMENT AND CONTROL OF ASBESTOS DUST EXPOSURE Thin Page Rev Nov 1114 10. IPA ASBESTOS EMISSION REGULATIONS 10.1 Application. Regulation! alio have been pro mulgated by the Environmental Protection Agency (EPA), Ref (7). These apply to friable aabeatoa material* which contain more than 1 percent aabeato* by weight and which can be crumbled, pulverized, or reduced to powder by hand pressure when dry. Du Pont operation* within Ihit criterion normally will be limited to reno vation or demolition involving aabeato* intulation. 10.1.1 Renovation involves removing or (trip ping away aabeato* from pipe*, duct*, boiler*, tank*, reactor*, furnace*, or other equipment or atructural member. Demolition involve* wrecking or removal of a load-supporting atructural member (beam* or loadsupporting wall*) and any related removing or stripping of friable asbesto* material*. During demolition, asbes tos shall be removed or stripped prior to the wrecking or taking out of load-supporting structural members. 10.1.2 When an individually scheduled reno vation or demolition job amounts to more than the quan tities listed below , a detailed report shall be filed with EPA (and in some case* a state or local agency) prior to removal. The removal operation shall follow the other requirement* of this standard, particularly 4.4. -a. 260 linear ft (SO m) of asbestos-containing pipe insulation b. 160 ft2 (IS m2) of asbestos-containing insu lation on ducts, boilers, tanks, or structural members For planned, but not individually scheduled, reno vations, a long-range estimate of the total amount of asbestos to be removed or stripped must be made. The period covered must be at least SO days but not more than a year. EPA must be given notice if the amounts esti mated exceeds 10.1.2 a or b. 10.1.3 When renovation amounts to lesa than 10.1.2 a or b, notice to EPA is not required. which may create airborne dust concentrations, shall be collected and disposed of in sealed, impermeable bags, or containers. Caution labels shall be attached conforming to section 12. 10.2.1 All disposal sites must have specific warn ing signs, fencing, and dust suppression methods as required by the EPA regulation (40 CFR 61.1S3). 10.3 For specific report and compliance requirements, refer to the EPA regulation* Section 61.146, Ref (7). Local or state regulations also should be reviewed since they may be more restrictive. 10.4 Wastes should be managed on-site whenever prac ticable. When it becomes necessary to send waste off-aite, other Du Pont cites with available burial facili ties should be the first choice. Ref (13). 11. TRAINING 11.1 In areas where people work with asbestos, employees should be trained with the goal of increasing knowledge of: I. Work practice* involving asbesto* and the potential for fiber emissions b. The physical characteristic* of asbesto* C. Diseases which may result from exposure to asbestos fibers including the role of smoking in lung cancer d. Reasons for, and methods of, exposure monitoring a. The purpose and nature of engineering and work practice eoetrol methods, personal protective equipment and clothing, and personal hygiene f. The elements of medical surveillance 12. CAUTION SIGNS AND LABELS 10.1.4 When demolition amounts to lets than 10.1.2 a or b, a simplified report shall be filed with the EPA prior to removal. The removal operation also ahall follow the other requirements of this standard, particu larly 4.4. 10.1.5 The requirements of this standard should more than meet the additional precautions specified by EPA regarding wetting, containerizing, disposal, and exhaust control. 10.2 Waste Disposal. All aabeato* waste, including items such as scrap, empty bags or clothing to be dis carded, vacuum system collection, and other wastes 12.1 Caution signs conforming to Figure 1 shall be posted at all approaches to areas where asbesto* concen trations may be above permissible exposure limits. They shall be placed at a sufficient distance to permit an employee to read the signs and take necessary precautions before entering the area. 12.2 Caution labels conforming to Figure 2 shall be used to identify containers of raw materials, scrap, waste, other products containing asbestos, and asbestoseontaminated clothing. 12.3 Identification label* are suggested for iden tification of asbestos-containing and asbestos-free Pontom printed m red mast OSH* fagutiston*. Section 1*10.1001 (tonneriy .(9a) lor a* sections saospt 42 *Mch Is oovored by leobon 1*10.1*4. <$m> DUP 1011063 + S4T, p6 + DU 053105 >44 TW'Pm Rav Oct IMS MEASUREMENT AND CONTROL OF ASUSTOS OUST EXPOSURE SAT Pago 7 insulation, see SN218P. It i recommended that storage locations of bonded asbestos gaskets be labeled. Use appropriate procedures when handling, cleaning up, and ultimate removal. 13. REFERENCES .8 Occupational Safety and Health Standards, Part 1910, Sections 1910.1001 and 1910.134 (20 CFR 1910). 9. Pabco Technical PTB -4B - 7A. "Asbestos Identi fication in Old Calsii Insulation" (February 15, 1979). 1. Asbestos: An Information Resource, National Can cer Institute, DHEW Publication No. (NTH) 71 1681 (May 1978). 2. Selikoff, L. J. and Hammond, E. C., "Asbestos and Smoking," JAMA 242:458 f1979). 3. NIOSH Method PACAM 239: "Asbestos Fibers in Air," NIOSH Manual of Analytical Methods, 2nd Ed, Vol 1, DHEW (NIOSH) Publication No. 77-157-A. 4. "USPHS/NIOSH Membrane Filter Method by Evaluating Asbestos Fibers," NIOSH Technical Report No. 79 - 127 (February 1979). 5. Du Pont Medical Division. "Guidelines for Physi cians," Section 4.1.F, Interpretation of X-rays (January 1982). 8. ' "Industrial Ventilation -- A Manual of Recom* mended Practice," American Conference of Gov ernmental Industrial Hygienists, latest edition. 7. National Emission Standard for Asbestos, Title 40, Code of Federal Regulations: Subpart M (40 CFR 61.140 - 61.156), published in Federal Register, Vol 49. No. 67 (April 5, 1984). 10. NIOSH/OSHA Respirator Decision Logic, OSHA Industrial Hygiene Manual, Chapter III. 11. Hyatt, E., "Respirator Protection Factors," Las Alamo* Scientific Laboratory Publication LA -6084 (January 1976). 12. Baldwin,C.A., Beaulien, H. J., and Buchan. R. M., "Application of the Asbestos Screening Test in Colorado Schools," A1HA J.43:602 (1982). 13. Environmental Quality Committee. "Corporate Policies and Guidelines," November 13, 1981 with periodic updates. 14. Natale, Anthony and Levins, Hoag, "Asbestos Re moval and Control," (Voorhees, NJ, Source Finders and Information Corp, 1984). Distributed by As bestos Control Technology, Inc, Box 183, Maple Shade, NJ 08054, phone (800) 221 -1911. (8280 each) 15. "Controlling Asbestos Contamination with Nega tive Air Filtration Systems," (Voorhees. NJ. Source Finders and Information Corp, 1984). Distributed by Asbestos Control Technology, Inc, Box 183. Maple Shade, NJ 08054, phone (W0) 221-1911. (814 each) 18. Dixon, S.W., "Respirator Workplace Protection Factors for Asbestos," Haskell Laboratory Report No. 462 - 84 (Oct 18, 1984). DU 053106 Py MEASUREMENT AND CONTROL OF ASBESTOS DUST EXPOSURE *+ThteFas* Issued Nov 1SS4 S4T,p8 r - aw i' - i>/i 1 Yellow letters on bloek background* CAUTION Block letters on yoilow background Letter sizes end stylet to be ot leost es visible es that listed below; 1 Sens Serif, Gothic, or Bloek Sons Serif, Gothic, or Bloek 1(,4 Gothic* Spacing to be ot leost oquol to the height of the upper of ony two lines ASBESTOS DUST HAZARD Avoid breathing duet Wear assigned protective equipment Do net remain in area unlees your work requires it ftreolhtrtg asbestos dust may be heterdeus te your health FIGURE 1 - CAUTION SIGN, ASBESTOS OUST CAUTION Contains asbestos fibers Avoid creofing dust Breathing asbestos dust may causa serious bodily harm Label size and printing to be readily visible and legible. FIGURE 2 - TYPICAL CAUTION LABEL* * Available from M & M Oispleys, 3301 Moidan Lana, Philadelphia, PA 19145 Figures 1 ond 2 meet OSHA requirements, Section 1910.1001 (formerly .93ol. / DUP 1011065 4- DU 053107