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'.: , ';?V-, fry- `W$& Chapter XVII--Occupational Safety ai's) Health Administration/ Dep iilment of Labor PACT 1910--OCCUPATIONAL SAFETY AND HEALTH STANDARDS Emergency Standard for Exposure to Asbestos Dust Title 29--LABOR Chapter XIII--Bureau of Labor Standards, Department of Labor PART 1518--SAFETY AND HEALTH REGULATIONS FOR CONSTRUCTION Standard for Exposure to Asbestos Dust Pursuant to section 4(b) (2) of the Wilfiams-Steiger Occupational Safety and Health Act of 1070 (84 Stat. 1592, 20 U.S.C.853). f 1518.66 of Title 29, Code of Federal Regulations; is hereby amended in the manner indicated be low in order to prescribe a,new stand ard limiting the exposure of workers to asbestos dust The new standard limit ing the exposure of employees to asbes tos dust is that adopted under section 6(c) of the Wllliams-Stelger Occupa tional Safety and Health Act of 1970 and published in the Federal Register on this date. The standard *is hereby de termined to be more effective than that presently provided under 51518.55 to the extent that it prescribes minimum levels of exposure to asbestos dust. Therefore, by operation of section 4(b) (2) of the Act the new standard Issued under .section 8(c) supersedes the con struction safety standard relating to ex posure to asbestos dust. Section 1518.55 is hereby amended by adding a new paragraph (c) thereto. As amended f 161(1.55 reads as follows: 1518.55 Crises, vapors, fumes, duals, and mists, **** (c) Paragmplis (a) and (b) of this sec tion do not apply to the exposure of em ployees to airborne asbestos dust. When ever any employee is exposed to airborne asbestos dust, the requirements of 8 1910.03a of this title shall apply. Effective date. This amendment shall become effective upon publication In the Federal Register (13-7-71). (HOO. 4(b)(3), M Stat. 1883, 30 TT.S.O. 063; 8eoMtry* Ortor NO. 13-71, SO Fit. 0704) Pursuant to section 6(c) of the Wil liam >;-Steiger Occupational Safety and Health Act of 1970 (84 Stat. 1596, 29 U.S.C. 055), Part 1910 of Title 29, Code of Federal Regulations (88 F.R. 10466, May 29, 1971) Is hereby amended in the maimer Indicated below in order to pro vide sin emergency standard dealing with the exposure of employees to asbestos dust. In light of increasing 'information on the results of exposure of employees to airborne asbestos dust, including recent studies by the National Institute for Oc cupational Safety and Health and others, and recommendations by the American Conference of Governmental Industrial Hygienists (ACGIH), It is hereby deter mined that (1) exposure under the pres ent standard for asbestos dust in Table G-'!, 8 1910.93, of 12 fibers per milliliter greater than 5 microns in length or 2 mil iion particles per cubic foot of air, whii.li is derived from an established Fed eral standard promulgated under the Wnlsh-Healey Public Contracts Act on May 20,1969, constitutes a grave danger to employees exposed, to this 8-hour tinic-weighted average concentration; anti that (2) an emergency standard is necessary to protect employees from this excessive exposure. The National Insti tute .for Occupational Safety and Health concurs that the proposed change in the asbestos dust standard recommended by the American Conference of Governmen tal Industrial Hygienists should be the substantial base for the emergency standard. Action concerning the standard will be commenced under section 0(b) in the immediate future. Any notice of pro posed rulemaking under section 6<b) will give notice of the emergency standard as a proposed rule and also of any ap propriate subsidiary proposals which may be required under subparagraphs (5) and (7> of section 6(b) relating to the ex posure of employees to toxic substances. Part 1910 Is amended as follows: 1 Table 0-3 following 81910.93 (36 F.R. 15104, Aug. 13, 1971) is hereby amended by deleting the following: AMientoB--13 fibers per milliliter greater than fi microns la length or.---------- 3 Mppcf. Trei noilfee ___ - -- 0 MjJpcf. SOrng./LP . A(. - % 810, tp.-f nOERAl MOllTU/ VOt aA. NQ,, 4U4--7TU8IOAY, ,DSC*ttm 7, 1W1 :'t(: . Aa :U:, I., HWBUI0004872 'i0';,v 3;:.-33 V v . 3,,3 i, ^ AMfD It^OULATfONS , """" v` v .... : >tf NifKfty .. ,s:;:v; ; 'tyy.-&w. Imp -'w; , As arhended.TableG-3 reads as be used to meet the' exposure li&tfts pre * follows: .; ' :` : [\ T^toja G-^-MlNBRAL ijVBTS ' scribed in paragraph (a) of this section, subparagraphs relating to the pperf Where such engineering methods are not Involved. The requirements of this para feasible, or do not otherwise reduce the . graph are in addition to those presferibea. Mpp6f Mg/M concentrations below those prescribed in in paragraph (b) of this section. '-i> , paragraph (a) of this section, respira (2) All hand- or power-operated tools*- Silloa: Crystalline: . . tory protective devices shall be provided which produce asbestos dust such as, but,,?' and used In accordance with paragraph not limited to, saws, scorers, abrasive' Quartz (respirable). 260 * 10mg/M* m (c) of this section. wheels, and drills shall be provided with ' %8iOH-5 %fliOH-2 (0(1) <t) when the limits of ex-. local exhaust ventilation and dust col Quartz (total dust)..........................--- 30miM Posure to asbestos dust prescribed in lectors in accordance with the American Cristobalite: Use H the value calculated from the count or mass fonnulao for quartz. Tndymito: XJso H the value calculated from tho for mulae for quartz. Amorphous, Including natural diatomaccous earth................. 20 Silicates (less than 1% crys talline silica): Mica.............20 ' Soapstone............................ 20 Talc............................. 20 Portland cement___-______ 50 Graphite (natural)............. 16 Coal dust (respirablo fraction loss than 6% SiO*)i.._....................... Pormoro than 6% ....... .. %S3Os-i-2 80ing/M8 %8lOa 2.4mg/Ma or 10mg/M* paragraph (a) of this section are ex ceeded and when engineering controls required by paragraph <b) of this section arc not feasible or do not otherwise re duce the concentration of asbestos dust below those prescribed in paragraph (a) of this section, the employer shall re quire the use of respiratory protective de vices. The selection of respiratory protective devices shall be limited to those specified in the remaining subparagraphs of this paragraph (c). (ii) The employer shall require that: each employee test his respiratory Pro tective device before each use in order to insure a proper fit according to the manufacturer's instructions. The em ployer shall further provide for effective National Standard Fundamentals Gov- ' eming the Design and Operation of Local Exhaust Systems; ANSI Z9.2--1971. , (3) Employees exposed to the spraying of asbestos or the demolition of pipes,1 structures, or equipment covered or in sulated with asbestos shall be provided with respiratory protective devices in accordance with paragraph (c) (4) of this section. .; (e) Asbestos cement, mortar, coatings, grout, and plaster shall be mixed in ; closed bags or other containers. (f) Asbestos waste and scrap shall be, collected and disposed of In sealed bags or other containers. :' * ' i (g) All cleanup of asbestos dust and Inert or Nuisance Dust: Respirablo fraotion___ Total dust___ ......... %SiOj-J-2 training or supervision of employees in blowing shall be performed by vacuum 15 5mg/M8 the testing of respiratory protective de- cleaners. No dry sweeping shall be per 50 16mg/M8 vlces for fit before their use. formed. (2) For an atmosphere containing not 3. Section 1910.12 is amended by Note: Conversion factors-^ mppcfX35.3=miUion partiolos per cublo meter *=parfcioles per c.c. Millions of particles per cubic foot of air, based on lmpinger samples counted by light-field technics. f The percentage of crystalline silica in tho formula Is the amount determined from air-borno samples, ex cept in those instances in which other methods have boon shown to be applioable. i As determined by the membrane filter method at ,430Xphase contrast magnification. \ n Both concentration and percent quartz for tho appli cation of this limit are to he determined from the fraction more than 25 fibers per milliliter greater than 5 microns in length over an 8-hour average, or more than 50 fibers per milli liter over any period of 15 minutes, a reusable or single-use filter type respira tor, operating with negative pressure during the inhalation phase of breathing, approved by the U.S. Bureau of Mines under the provisions of 30 CFR Part 14 (Bureau of Mines Schedule 21B), or a changing paragraph (a) in order to apply the emergency standard prescribed in the new 1910.93a, which is published in this document, to construction work which is subject to the Aot. The amendment is necessary in light of the rule pf regula tory construction set forth In g 1910.5(c). As amended, $ 1910.12 reads as follows: 1910.12 Construction work. passing a size-selector with the following characteristics: valveless respirator providing equivalent (a) (1) Adoption and extension of es protection, shall be used. . tablished safety and health standards Aerodynamic diameter (unit density sphere) Percent passing , selector (3) For an atmosphere containing not for construction. The standards pre more than 250 fibers per millilter greater scribed by Part 1518 of this title and in than 5 microns in length over an 8-hour effect on April 28, 1971, are adopted as 2 2.5 00 ; 76 average, or more than 500 fibers per occupational safety or health standards milliliter over any period of 15 minutes, under section 6(a) of the Act and shall 3.5 . 5.0 10 60 26 0 a powered filter positive pressure res apply, according to the provisions pirator approved by the TJ.S. Bureau of thereof, to every employment and place Mines under the provisions of 30 CFR of employment of every employee en Tho moasuremonts under this note refer to the uso of an ARC instrument. If tho respirable fraotion of coal dust is determined with a MRB tho figure corresponding to that of 2.4 Mg/M? in the tablo lor coal dust is 4.5 Mg/M3 2. A new 1910.93a Is added to Part 1910. The new 1910.93a reads as follows: 1910.93a Asbestos dust. (a) The 8-hour time-weighted aver age airborne concentration of asbestos dust to which employees are exposed shall not exceed 5 fibers per milliliter greater than 5 microns in length, as de termined by the membrance filter Part 14 (Bureau of Mines Schedule 21B) shall be used. (4) For an atmosphere containing mpre than 250 fibers per milliliter greater than 5 microns in length over an 8-hour average a type C positive pres sure supplied-air respirator approved by the U.S. Bureau of Mines under the. pro visions of 30 CFR Part 12 (Bureau of Mines Schedule 19B) shall be used. (5) The employer shall establish a respirator program in accordance with the requirements of American National Standard Practice for Respiratory Protention Z88.2--1969. gaged in construction work. Each em ployer shall protect the employment and places of employment of each of 'his employees engaged in construction work by complying with the appropriate standards prescribed by this paragraph. (2) The standards prescribed in g 1518.55(c) of this title shall apply in the case of the exposure of any em ployee in construction work to airborne asbestos dust. Effective date. These amendments shall become effective immediately upon % 3 method at 400-450 X magnification (4 (6) The respirators provided each em millimeter objective) phase contrast ployee shall be properly inspected, illumination. Concentrations above 5 cleaned, repaired and stored. fibers per milliliter but, not to exceed 10 fibers per milliliter, may be permitted up to a total of 15 minutes in an hour for up to 5 hours in an 8-hour day. (d) (1) When an employer has era ployees who are exposed to asbestos dust exceeding the limits prescribed in para graph (a) of this section and the ex (b) Engineering.methods, such as but posure results from the operations de not limited to, enclosure, vacuum, sweep-. scribed in the remaining subparagraphs publication in the Federal Register (12-7-71). (Sec. 6(0), 84 Stat, 1696, 29 U.S.O. 666; Sec retary's Order No. 12-71, 36 F.R. 8764) Signed at Washington, D.C., this 2d day of December 1971. G. G. Guenther, Assistant Secretary of Labor. , ng, add' IbdaJ exhaust ventilation, shall of this paragraph (d), the employer shall :! tFRDoo.71-17833 Filed ia-6-71;6:47 aul FEDERAL REQlfrlR, ....... 3-: 34, NO.. 234--^TUE9DAY, DECEMBER 7, im .'tf-'V: ( 3: HWBUI0004873