Document RJZXQywV049mGpwpavxpenq88

S Occupational Safety and Hoaith Admiru, Labor { 1910.1000 f 1910.1900 Air conumiMfiti. An employee's exposure to any ma terial listed in table Z-l, Z-2. or Z-3 of this section shall be limited in accord ance with the requirements of the fol lowing paragraphs of this section. (a) Table Z-l; (1) Jfolerial* trifA names preceded by "C"--Ceiling Values. An employee's exposure to any material In table Zi, the name of which is preceded by a *`C" (e.g,, c Boron trifluoride), shall at no time exceed the ceiling value given for that material In the table. (2) Other material*--8-hour time weighted averages. An employee's ex posure to any material in table Z-l, the name of which is not preceded by "C". in any 8-hour work shift of a 40hour work week, shall not exceed the 8-hour time weighted average given for that material in the table. (b) Table Z-2: (1) 2-hour time weighted averages. An employee's ex posure to any material listed in table Z-2. in any 8-hour work shift of a 40hour warir week, shall not exceed the 8-hour time weighted average limit given for that material in the table. <2) Acceptable ceiling concentra tions. An employee's exposure to a material listed in. table Z-2 shall not exceed at any time during an 8-hour shift the acceptable ceiling concentra tion limit given for the.material in .the table, except for a time period, and up to a concentration not exceeding the maximum duration and concentration allowed is the eolunurunder **accepta ble peak, above the accepta ble ceiling concentration lor in 8-hour shift". (3) Example. During an 8-hour work shift, an employee may be exposed to a concentration of Benzene above 25 p.pjn. (but never above 50 p.pjn.) only for a mavimttyn period of 10 minutes. Such exposure must be compensated by exposures to concentrations leas than 10 p/m so that the cumulative exposure for the entire 8-hour work shift does not exceed a weighted aver age of 10 p/m (c) Table Z-3: An employee's expo sure to any material listed in table Z3. in any 8-hour work shift* of a 40hour work week, shall not exceed the B-hour time weighted average limit given for that material in the table. <d) Computation formulae: (1) (i) The cumulative exposure for an 8-hour work shift shall be comput ed as follows: <s-ar.-eC,r.+ ... s Where: U the equivalent exposure for the work- ins shift. C ta the concentration durine an; period of time T where the concentration remains constant. T is the duration in hours of the exposure at the concentration C- The value of E shall not exceed the 8hour time weighted average limit in table Z-l. Z-2, or Z-3 for the material involved. <li) To illustrate the formula pre scribed in paragraph tdXlXl) of this section, note that isoamyl acetate has an 8-hour time weighted average limit of 100 p.pjn. (table Z-l). Assume that an employee is subject to the follow ing exposure: Two hours exposure at 150 p/m Two hours exposure at T5 p/m Pour hours exposure at 50 p/m Substituting this information In the formula, we have (2xl50*2x75-r4x50> * t-81.29 p/m Since 81-25 p.pjn. is less than 100 p p m-, the 8-^our time weighted aver age limit, the exposure Is acceptable. (2) (1) In case-of a mixture of air con taminant*,on* employer shall compute the equivalent exposure as follows: E.-<G*L.+C.-rU>-+ - . (C.-U) Where: Em is the equivalent exposure far the mixture. C is the concentration of a particular con taminant. L is the exposure limit for that contami nant, from table Z-L. Z-2. or Z-3. The value of Em shall not exeeed unity (1). (ill To illustrate the formula pre scribed. in paragraph (d)(2)(l) of this section, consider the. following, expo sures: 705 8 CO o $ 1910.1000 29 CF* Ch. XYH <7-14* Etftiae) MtWflM Aaw MnM*. 10MI lM ** WM M* Mm Tasle 2-1--Conwxjad IfltMMI'BI MM M'V* ****** amm 2 a-aimm am* Town aMM 2.JI -- ____ JODf/m *0 p/m____ JBO p/m ****1* (Wii fMi>nr IMim__ atm wp<m |M (a Substituting in the formula we have: u OS Em * MO+1.000*45* 300+40+300 'TnlMTMW -- Em-.0.500*. 0.325+0.300 Em-.0.5 Since Em U less then unity (1), the ex Omwmi MllfMy emMOaM Oiimi posure combination U within accepta i ble limit*. .. t-pr-rr, It) To achieve compliance with para *-------- in atrr nMfWii 1*00 uoo graph* <%) through <d) of this section, administrative or engineering controls must first be determined end imple mented whenever feasible. When such controls ere not feesible to schieve full i*tfMtwtf SWamWW (M Cw W* MMM lltMM --r p 1 Mfcil MMH IM 200 200 no compliance, protective equipment or any other protective measures shall be uo 440 100 soo used to keep the exposure of employ* ees to air contaminants within the limits prescribed in this section. Any equipment and/or technical measures used for this purpose must be ap- proved for each particular use by a competent industrial hygienist or other technically Qualified person. C tan**! iiraiM m C04-- Am kfr-MtuMAMp*OMOafi i*w <*GQ_____ ***** BWlll CwnM. <"wm.ii CammSm^) Cam him CM.MM. , 10 zro as Whenever respirators are used, their Cm****.* use shall comply with f 1910.134. TaSIE Z-1 flWWI MW SMI CTMrifi Mm--m , ,, COMMA.. os OS tWWM> I T TTMtowwiwh IM _ MAfaMiMQuMaIlM ... I A.A4mMhWRmMMMM M0 P*nanm> 3D A**M*mCMWWaMnMt.WMftmWffmiWMma,,M, M* 1. a. M***MfXMl MiMCBIWMhOili . *. fcM os Ac wVtrnyinnjuiMyi M.<*sn_ 16 > fMMetmm MM TuriM *1 OS 0.1 6.4 1a m .... AMI-- _ "NAcAMAHWMffM.itntMm-Mimll i.Mii {MnM *l-- 0, pmhm.^.^1 *M"onr mw cenetM<a ibs SO) - u 6H If 0.& 706 22069002 Octtyfimrt Safety end Mewfth 5/ 1910.1000 Tau 2-1--Contwx*^J 29 CM. Ou XVI MMm) 1al Zi--Contnuad Occupational Wf#ty and t Tamc Z-1--'Contone i. tmm. +1m*mm. -i: Ou nnodwo. uw turn am mu. IhM. <1M JMdni f .'*"' I- Mmm____ fcM menocMano*. Wkir pamalMfMaSuMuf 2.4JT__ tmiw*. TCO^--SMi. Yatomm. "f-- TI*-Ca*i_ CUlUtW-TNwni>M.Mit2 - MNtn UA2-T U- 1.JA2-T* Wt C*5Wn 4wi, Tmwv woe las T Tammcm* ae tat Sam. TThmwwmiu>i iuwoon. Tawyi *. wwnwii warn*- TtiMuti itsuM ounaounqiHSUnsT1------------------------------ 708 watanai ar< * Z37 4CMBM. MM (Z37^ft>1T0l < CMIWHWM <2JT.Vi*TCI___> C BFG18593 Occupation*! Safety and Health Table Z-t--Continued 709 BFG18594 > Th* mm w Muwy ilium min minmi mv twams ft *" STH * iww M*MTmMMMft fMtlOM.IOOMM. T10MMIrMMUMM<Wv MWOMl |t 1l01a0n.1yAM4fwt ooMy lyoWr M*MM* ft IMtio.iMnalaOMNOoaM a MM not in Mb Taais 2-3 mmctal Ousts Taal* Z-3--Minimal Bum .Continued 710 Owiprtftwt St <i MM M| 2 a3to.s6 10 l 111 |M> * Il7iT iTn <**' MAE. *w i> 2.4 Mg/M * r> * IMZ9 to* 4041 C3 PR 23502. June S' and Amended At *0 FR Edxtoual Hors: Per t*Uons affeettn* I 191' Ins Aids oecuoo of ttus 11919.1001 AxbeMoo, phyllite, i' ' rctini (s) Scope and apj section Applies to al posures to asbestos, pftyllite. end ft'^inc tries covered <~>y Safety And Be*)lh j vided in paragraph tion. (2) This section c construction work . cm 1910.13(b). t: toe, tremolite. Lnth tinolite in conduct! by 29 GFR 1926.5a.) (b) Definition*, "A mn Airborne concent: tremolite, Anthophy: a combinetion of the fiber per cubic cent!: cAlculAted as sn eig weighted average. "Asbestos" include site, crocidollte, tr enthophyUlte asbe* bestos. mnd Any of t) have been chemical altered. - "Assistant Secrete sistant Secretary of tional Safety and H* meat of Labor, or de "Authorized pen person authorized and required by present in regulated '`Director" means the National Instltu O BFG18595 ifton) OccwpctwMl Swtety mn4 HW> Admin* UUr $ 1910.1001 wrtf 4 aryl t*f3 v*f2 *r 3 r IMd t(/W< O' .SO.-2 Sm/W> *1 BHmMt It M al Safety and Health. UJS. Depart ment ol Health and Human Services, or designee. "Employee exposure" means that OmiMMeWMHi faM --% MU i ]\ exposure to airborne asbestos, treraoUte. anthophyUite. actinollte. or a 2 U u u 10 1 i~ 0 7* combination of these minerals that would occur if the employee were not 80 using respiratory protective equip 2S 0 ment. "Fiber" means a particulate form of asbestos, tremolite. anthophyUite. or t* UvM'n * UflC. * Mm nMM M MM IV CM M <i WM1, M) MM t sctinoUte, 5 micrometer* or longer, with a iengtb-to-dlameter ratio of at CJ9 FR 23502, Jam 27, 1574. RiMinticd and u&enmo at 40 FR 23072. Mar 23.1075) Eorroaut More: For ftscaa tamn dtations affoetln* 11010.1000. wt the Find ing Aids section at this volume. least 3 to 1. "High-efficiency particulate air <HEFA> filter" means a filter capable of trapping and retaining at least 99.97 percent of 0.3 micrometer diameter mono-disperae particles. 119)3.1001 Asbesloe, tranollU. antho. pfcytiiu. and aetinoiiu. (a) Scope and application. (1) This section applies to all occupational ex posures to asbestos, tremolite, antho- phyUlte, and actinollte, in all indus tries covered by the Occupational Safety and Health Act, except as pro vided in paragraph (eK2) of this sec tion. (2) This section does not apply to construction work as defined in 29 CFR 1910.12(b). [Exposure to asbes tos. tremolite, anthophyUite. and ac- tinoUte in construction work is covered by 29 CFR 1926.58.] (b) Definitions. "Action level" means an airborne concentration of asbestos, tremolite. anthophyUite, actinollte, or a combination of these of 0.1 fiber per cubic centimeter (f/cc) of air calculated as an eight (8)--hour time- weighted average. "Asbestos" includes chryaotUe. amo- site. crocidoUte, tremolite asbestos. anthophyUite asbestos, actinollte as bestos. and any of these minerals that have been chemically treated and/or altered. - "Regulated area" means an area es tablished by the employer to demar cate areas where airborne concentra tions of asbestos, tremolite. antho- phyUlte, actinollte. or a combination of these exceed, or can rea sonably be expected to exceed, the permissible exposure limit. "Tremolite, anthophyUite. or aetino- Ute" means the non-asbestos form of these minerals, and any of these min erals that have been chemically treat ed and/or altered. (e) Permissible exposure limit (PEL). The employer ensure that no em ployee is exposed to an airborne con centration of asbestos, tremolite. anth ophyUite, actinollte, or a combination of these minerals in excess of 0.2 fiber per cubic centimeter of air as an eight (8>-hour time-weighted average (TWA) as determined by the method pre scribed In Appendix A of this section, or by an equivalent method. (d) Exposure monitoring.--<1) Gen eral (i) Determinations of employee exposure shall be made from breath ing zone air samples that are repre sentative of the 8-hour TWA of each "Assistant Secretary" the As sistant Secretary of labor for Occupa tional Safety and Health. V. Depart ment of labor, or designee. "Authorized person" means any employee. (li) Representative 8-hour TWA em ployee exposures shall be determined on the basis of one or more samples representing full-shift exposures lor person authorised by the employer each shift for each employee in each and required by work duties to be job classification in each work area. present in regulated areas. (2) initial monitoring, (i) Each em "Director" means the Director of ployer who has a workplace or work the National Institute for Occupation operation covered by this standard.