Document RaRGxjRwDo0KpM6vR6G93xo3a

F.. bePi or LAffoA- ASPVSroJ Title 41--PUBLIC CONTRACTS AND PROPERTY MANAGEMENT Chapter 50--Public Contracts, . Department of Labor PART $0-204--SAFETY AND HEALTH STANDARDS FOR FEDERAL SUPPLY CONTRACTS Standard for Exposure to Asbestos Dust Pursuant to section 4(b)(2) of the Wllliams-Stelger Occupational Safety and Health Act of 1970 (84 Stat. 1592. 29 U.S.C. 653), 5 50-204.50 of Title 41, Code of Federal Regulations. Is hereby amended in the manner indicated below in order to prescribe a new standard limiting the exposure of workers to as bestos dust. The new standard limiting tlie exposure of employees to asbestos dust is that adopted under section 6(0 of the WUltams-StclRcr Occupa tional Safety and Health Act of 1970 and published in the Federal Register on this date. The standard is hereby determined to be more effective than that presently provided under f 50-204.50 to the extent that It prescribes minimum levels or exposure to asbestos dust. There fore. by operation of section 4(b) (2) of the Act the new standard issued under section 6(c) supersedes the construction safety standard relating to exposure to asbestos dust. - Section 50-204.50 is amended to read as follows in order to apply the new standard limiting the exposure of work ers to asbestos dust: 50-204.50 Cases, vapors, fumes, dusls, and mists. (a) (1) Exposures by inhalation, in gestion, skin absorption, or contact to any material or substance (1) at a con centration above those specified In the "Threshold Limit Values of Airborne Contaminants for 1968" of the American Conference of Governmental Industrial Hygienists, except for the ANSI Stand ards listed In Table I of this section apd except for the values ol mineral dusts listed in Table D of this section, and <u> concentrations above those speolfied'tn Tables I and H of this section, shall be avoided, or protective equipment shall be provided and used. ; . (2) The requirements of this section do not apply to exposures to 'airborne asbestos dust. Exposures of employees to airborne asbestos dust shall be subject to the requirements'of 29 CFR 1910.93a. (b) To achieve compliance with para graph (a) of this 'section, feasible ad ministrative or engineering controls must first be determined and Implemented is all cases. In esses where protective equip ment In addition to other measures Is used as the method of protecting the em ployee, such protection must be approved for each specific application by a com petent Industrial hygienist or other tech nically qualified source. Taplb II--Min nal Dosw Bubetnnee enic*: OmtiUliki: . ` Quart* (neplreble) Ifppcf Mg/M* MtM lOmgfrP* Quarts (totaldust) Crtotobalite: Us* H the value onlenlated from the count or mass formulae for quart*. Trldymlta: Cm M the value calculated from the for mulae for quart*. . Amorphous, Including natural diatomaoeous earth......... ....... flnicatae (less than 1% eras* taU!ue*UJ#Q: ` WIWI. Soapstone., Tale.......... traotfon' For more than 5%. 8tOf. Inert or Nulsanoe Duse Respirable fraction.. ,,. Total dust........ . ' %8JO,+3 80 flOmgftft , ' . %m<h 99 29 . 20 *0 u 2.4mg/lP lOomr tfhP %S40rt-2 IS tofi/M* lSag/W . Non: Oonvenioa faefora-- . mppefXSSJ~mtlttoo parttelee per cubic meter -partioleepercA , . . Millions ot par(lolei per coble footof air, baaed on tmplnger samplce oountarby UghMleld technics, < Hie pevoontage of crystalline itUoa to the formula .-far the amount determined. from air-borne mraplse, eacept In thorn Instances In which other methods save been shown to be euDUcahle. I A* determined uy the membrane filter method at 410 x phase contrast magnification. Both concentration and, percent Quart* far the application of tbit limit era to bo determined from the fraction rising a size-eelactor with tb* following . characteristics; * .,, . ' Aerodynamic diameter. 1 ' (unit density sphere) Percent paarihr selector '' . IS AS A0 10 . ' ' 70 so ' 38 .0 ' . . -----------Ihe i an AJBO taatmmenu-t.n-Idfetrh-tehirseenpof.atea.br.elaf.efrrateot-ftotue(|n^aMe2f .' Effective date. This amendment Become effective upon publication in the FxomaL Rxoister (12-7-71): (Sec- 4(b) (9). M Stat. 1S99, as D.BXJ. CBS; . 8oreta*y` Order No. 13-71.'86 FJL 8764) Signed at Washington, D.C., thl 3d day of December 1971. ' ' G. C. Gdentheb, ^Assistant Secretary ofLabor. |FR Doo.71-17834 Filed 12-6-71:8:47 uni FMSI--0102 Vl (>_ FMSI 02880 T