Document By354dY4eDng8LKVZpqNnqomX

FILE NAME: Wagner (WAG) DATE: 1971 DOC#: WAG016 DOCUMENT DESCRIPTION: State Regulation - Threshold Limits & Federal Register Entry - Standard for Exposure to Asbestos Dust APPENDI. C 11 TITLE 25. RULES AND REGULATIONS PART ]. DEPARTMENT OF ENVIRONMENTAL RESOURCES Subpart D. ENVIRONMENTAL HEALTH AND SAFETY ARTICLE IV. OCCUPATIONAL HEALTH AND SAFETY CHAPTER 201. PLACES OF EMPLOYMENT Subchapter A. THRESHOLD LIMITS Authority The provisions of this Subchapter A issued under AC S 19!"-A and 1920-A i~) P.S. 5 10-17 and 510-20). Source The prouvions of this Subchapier A adopted September 28. 1?"1, effective November I. 19"!. 1 Pa. B. 1985 GENERAL PROVISIONS 201.1. Definitions. .ores ard t-rm s when ined m this Subchapier'he!: hr.-.-c the foliov-mg meanings unless the context J,rally mciicates othc-wv :$e: (!) cnm.iinmant - A harmful substance or materia! m ..r usual!', occurring in the form of a dust. fume. gas. vapor or mist. (2) Confined space - Am tank, vessel or area so enclosed that adequate d.lution dation si'.all not be obtainicd by natural air m eua re ni (?) Department mcr.v, cal th. Tire Deparimer. i of Eu vire r.men (4 ) Dus! - Finely divided solid par tirles dis persed in :cd bv r.tchame cl means. sudi as grinding. ertisi:mg.' H.astine '(5) Fume - Solid panicles dispersed m anr resuit;me ir physical process that involved a change of state. (o') Gas - A formless Hind occupying the space cf enclosure. (7) Gencul or dilution tenttlauon - \-ruination provided io dilu.e Lie concentration of dusts, fumes, casea. vapors or mists in the atmosphere of all or part of the piece of employ ment. (S') Local exhaust rentihnon - That type of ventilation m which suction is applied at the point of generation of dusts, fumes, gases vapors and nist.s. (9) Mist - Liquid droplets suspended m air. (.10) Place o f employment - A location or site where an individual is employed in a trade, occupation or profession. ( ]\ ) Rock drilling machinery - Any machinery mounted or a-vehicle which is usedto excavate rock by means of drilling, cutting, chipping, channeling, broaching or crushing. (12) Siiori-'crm limn - The maximum atmospheric concentration of a contaminant to which a workman may be exposed for a specified short-time period. The concentration represents an upper limit of exposure for the specified time and assumes that there are sufficient recovery periods between episodes for recuperation. The daily average exposure to the contaminant, including these episodes, shall be such that the threshold limit value set forth in 201.72 of this Title (relating to threshold limit values) shall not be exceeded. Short-term limit values shall be those set forth in 201.73 of this Title (relating to short-term limit values). (13) Threshold limit mine - The maximum average atmospheric concentration of contaminants to which workers may be exposed for an eight hour w o t % day. These 201.1 A- 2 9 values are set forth in 201.72 of this Title (relating to threshold limit values). (14) Vapor - Any liquid, except water, which when held in suspension in air will revert to its orgmal liquid state after release from heat, chemical action or pressure conditions. 201.2. Purpose. The purpose of the provisions of this Subchapter shall be to prescribe minimum requirements and standards for the maintenance of occupational health and safer;, in places of employment in this Commonwealth, 201.3. Scope. The provisions of this Subchapter shall apply to all places of employment in this .Commonwealth. DUTIES OF EMPLOYER AND EMPLOYEE 201.11. Control measure and protective equipment. (a) Each employer shall install and provide those control measures and protective equipment which are required to provide for the health, comfort, safety and well-being oi the employee. Atmospheric contaminants shall be controlled at the point of origin. Even' employer shall submit at the request of the Department detailed plans and compliance schedules for correcting violations. Persona! protective equipment or administrative control shall be acceptable only for the time period specified by the Department and until engineering control is installed. Yv'here administrative or personal control measures must be used, medical tests may be required ir, accoruerme with the provisions of 201.14 of this Title (relating to physical examination for employees). (b) When the limits of exposure to asbestos dust exceed those prescribed ir. Table IS of 201.72 of this Title (relating to threshold limit values) and until engineering control is installed or proved not to be feasible, the following respiratory protection program shall be established- (1) For an atmosphere containing asbestos not more than 25 fibe's per milliliter greater than 5 microns in length over an S-hour average or mere than 50 fibers per milliLier greater tiian 5 microns in length over any period of 15 minutes, a reusable or single-use filter type respirator, operating with negative pressure during the inhalation phase of breathing, approved by the LLS. Bureau of Mines under -the provision of 30 CFR Part 14 (Bureau of Mines Schedule 21B). or a valveless re^pi.-ato: providing equivalent protection shall be used. (2) For an atmosphere containing asbestos not more than 250 fibers per milliliter greater than 5 microns m length over an S-hour average, or more than 5GQ fibers per milliliter greater than 5 microns in length over any period of 15 minutes, a powered filter positive pressure respirator approved by the U.S. Bureau of Mines under the provisions of 30 CFR Pen 1- (Bureau of Mines Schedule 21B) shall be used. (3) For an atmosphere containing asbestos more than 250 fibers per milliliter greater than 5 microns m length over an S-hour average, a type C positive pressure supplied-air respirator approved by the U.S. Bureau of Mines under the provisions of 30 CFR Part 12 (Bureau o f Mines Schedule 19B) shall be used. fc) Each employee shall properly utilize protective measures and equipment supplied by the employer to provide for the employee's health, comfort, safety and well-being. 201.12. Instruction of employes. Each employer shall inform and periodically instruct Eds employes regarding known hazards and proper methods for utilizing industrial hygiene control measures which are provided. 201.13. Cleaning of protective equipment. (a) When it is necessary for an employer to pmvrJc- protective equipment, the A-3 0 (3) It shall be ascertained by a trained person that no harmful contam inant arc present and mechanically induced dilution \entilation is used before entry and during occupancy to insure that an adequate quantity ol -oxygen is supplied to the confuted space. 201.32. Maintenance of desices and equipment. All atmospheric testing devices and respirators' protective equipment shall be maintained at all times to ensure that they are in satisfactory wonting condition. 201.33. Posting of entry procedures. Written confined spaces entry procedures shall be posted adjacent to tanks, vessels or areas which mav be entered. 201.34. Records to be maintained. Records o f atmospheric sampling in confined spaces along with procedures med shall be kept and made available to the Department on request. MAINTENANCE OF PLACE OF EMPLOYMENT 201.41. Protection from hazardous materials. The interiors, exteriors and environs of bui'dingx where ha stored or handled shall be cleaned and maintained m such a rna e\?v 'tire to hazardous materials w .tv materia am lived. er ti preit 201.42. Protective equipment. fa) Employes encaged in cleaning operations as set forth in the rmwsio 201.-I of this Title (relating to protection from haznreoi". matericL' and ail oil: ere exposed to such cleaning operations shall wear reqnreu protector .q.nrm (b) Cleaning operations shall b,, done with ruction apparatus. S 201,43. Wei processes. \ ere wet processes exist, reasonable drainage shall be maintained plaf.orms. im.ts or other means of safe footing shall be provided False :.oon. IDENTIFICATION OF HAZARDOUS CHEMICALS 201.51. Labeling. Adequate identification, warning and caution labels shall be applied to all containers of hazardous chemicals. ROCK DRILLING MACHINERY 201.61. Dust suppression 'device. No person shall engage in rock drilling operations by means of rock drilling m2chinen unless the machinery is equipped with either an integral water or exhaust ventilation Gust suppression device. The suppression device shall be operated and maintained In proper v.orkir.g condition. THRESHOLD LIMIT VALUES AND SHORT-TERM LIMITS 201.71. Permissible levels. fa) No employe shall be exposed to atmospheric conccntratjOr.S of rortiti'-trani which may give nse to occupational disease. A-31 TABLE I Substance 1. 2. 3-TrichIoropropane 1. 1, 2-Trichloro 1, 2. 2-trifluoroethane Trieihvlamine Trifluoromonobromomethane Tnmethy] benzene Trinitrotoluene - Skin Triorthocresy] phosphate Tripheny! phosphate Tungsten and compounds, (as W) soluble insoluble Turpentine Uranium (natural) soluble and insoluble compounds (as U) Vanadium (V -,05 dust) (V -,05 fume) Vio.yI acetate Vim. I chloride (chloroethylene) Vinyl toluene Warfarin (3-[ jaccionylbenzyl) -4hydroxycounvarin) Xylene (xylol) Xyiidine - Skin Yttrium Zinc chloride fume Zinc ox tee fume Zirconium compounds (as Zr) ppm 50 1,000 25 1,000 25 100 10 500 100 100 mc'.M: J U. _gL5 - ~ Tk 0.1 U; ;5 nl 0.2 0.5 0.1 12) The v.ord "skin" following a substance's name in Table 1 shall indicate that the substance penetrate the skin of an employe to cause systematic effects. (3) Ti.e term "ppm " in Table I shall indicate the parts of vapor or gas pe; million parts of air by volume at 253 C. and 260 mm. He. pressure. (4) The term "mg'M 3 " m Table 1 shall indicate the milligrams of particulate matter per cubic meter of air. (5) The term "CC" in Table 1 shall indicate that the threshold limit value dependw on the chemical components. id ) (1) Threshold limit values for certain mineral dusts shown in the following Table 11 shall be obvened in all pieces of employment: 'ABLE II Substance Silica Crystalline Quartz (threshold limit calculated from the formula) Cristobalite (same) Amorphous, including natural diatomaceous earth Grapliite (natural) Silicates (less than 122 crystalline silica) Mica M.P.P.C.F. 250 %SiO: -r5 20 15 20 201.13 i A-32 TABLE 11 Substance Perlite Soapstone Talc (non-asbesti form) Talc (fibrous) use asbestos limit Tremolitc (See Talc, fibrous) Portland cement Miscellaneous (less than \% crystalline silica) Asbestos (All Types) Coal dust (bituminous) (Respirable mass) Cnstobalite 'Inert' or Nuisance Particulates Quartz Silica, fused Trie., mite M.P.P.C.F. 30 20 20 " _ 30 30 5 fibers'ml >5n 2 mc/M3 -S f\ v *; ^ V''V'K *. v - **-L Q'h , ' ,V ' v -, ^ ,*` ^ A ' XJ in length (A) 1> One-half the value calculated from the count or mass formula for quartz 10 mguM3 o ' 30 mppcf (whichever is the smaller) of total dust )`r Si0: TLV in mppcf: 300_____ quarte. - 1C TLY for respirable dust in n a M` _________10 rmT.M3____ Respirable quartz - 2 TLY for ''total dust", respirMnc auci non respirable 30 me'M- quartz -r 3 l.sc quartz foiumiae Ci'v-hul.' the value calculated from formula for cuartc (2) The term "M.P.P.C.F " i" Tabic 11 shJ! indicate m;liions of parti .. foot of air based on impmuer samples counted b\ heht-fie id technique- (31 The term (A) in Table 1! shall indicate a dtermint irti h\ the ni T.br m : r ettiuci at 400-450 X nuumficat'on (- mm obuectite) phase cer, tract ilium nailon 201.23. Short-term limits. (a) (1) Short-term Jin *:s for certain substances shown i't :e L uo wing T dole ill i be cbscra ec in all places of employment: Substance Acetic acid A. e to ne Acrolein Acre lonitrilc Aldrin TABLE III Maximum averace exposure for rhe tint e period specified Time in ppm mc:'MJ minutes 0 ,, 1.000 0.5 , 40 1 *s ' 30 5 SO 30 ) 201.14 A-33 Title 29-- L&BOR .. .m . i_wuy, qte percent column requisite to providing for Its certification S tc n ed n t V.-n-s),:--*c D C,, ti ftvery should be id? 2 percent . have been complied with and sir.ee not dnyof December 1071. 1C) Identity. Procecii as directed in { delaying In so providing Is In the public :|$41-S2l of i this chapter, using- a. C.5 Interest, notice and public procedure anl G C .O i'r v " n irSi Jfcen t rutaxsium bromide disc prepared delayed effective date arc not prerequi A.vsijicn! S c c r d a r y o/ Lcbjr, ^described in par&gnoh (b)(1) of that sites to this promulgation. [ r n D . c v i - n o i r , n i r u i h t p. i 3 n ,,, ] ion, : * | Effective dale This order shall be ef "i CrvslallirMv. Pyxccd as directed fective upon publication In the Vintfal Chcpier XVII-- Occupational Sofcly <1,5040.) ot thlxjchaptcr. j . P.ECISTf.R (12-7-71). and Hcalih Adminitlcotion, Dc- lS4ic.ll K in o ry rl nr hy(r<K-liltvrMft (S ec. M 7, SO Stai <60. as m rn rird ; 21 VS C. parlment of Labor ;ulev j, 11 i n ) j PART 191G-- OCCUPATIONAL EAFEIY '(*.) /le<rtii^ccrtij Jre 'certification--!i Dated:: fiovcmlrer 21. 1971. AND HEALTH STANDARDS i) Star.dahu of U'rnttlv. ttrength.1, gj:Uli'. and purity. Minocycline hydro-, H. E . S i m m o n s , Emergency Slondord for Evposii'rc lo Upride capsules ere c imposed of tnlno-l JXrerior. B ureau o f D ru g }. Aibcvios Dutt # !n e hydrochloride bid one or more it ( F h D o c .ii -11773 n i e d 1 2 -0 -7 1 :6 -4 5 a m i jiabie and harmless 1rbricants and dll- 1 Pursuant to section 6!c) cf the Y.'il- tfc$ls enclosed In a gelatin capsule. Each liams-tteigcr Occupr.UontJ Safety r.-.-l Health' Act of 1S70 <64 Btat. 15C.C, 20 Lth-ule cantata* mlipcycltae hydror;ride equivalent totJOO milligrams oi U 8.C. 655), Part 1910 of Title 29, Code glocycllni. IU potency Is satisfactory of Federal Regulations (2C F.P. 10-GG. May 29. 1971) Is hereby amended In the $. is not less than PC percent and not than 115 percentJpi the number of Chapter XUt-- Bureau of Labor Siandordi, Deportment of tabor manner Indicated below in order to pro L'grams of miaocycXhe thablt Is rep vide an emergency stnndarri dealing v.lih en ted to contain. Itejnolatuie content . PART 1518-- SAFETY AND HEALTH Uie" rx|{O.M!ic uT r t n p l n y e t s l o a sh e v io . dust. 3Lot more than 12 percent. The mtno- ( REGULATIONS FOR CONSTRUCTION | a t hydrochloride U,sed ecu forms to In light of Increasing lurcrmntlon cn ffil-istandards prescribed by I J.50g.l(&) Sfondcrd for Exposure lo Asbestos Dost the results of exposure of employees to airborne asbestos dust, Lncludmc :o:cr.t ^.J) Labeling. It chall.be labeled in &c- studies by the National Instituto for O c Pursuant to eectlon 4 (b )(2 ) of the cupational Safety and HcsJth cr.d other-, with the requirerr.tntspf 5 145.3 ! Yr'iHir.ms-Stclger O ccupational Safety and recommendations by the American dvthis, chapter. .) lA/J.-.niLLdL JHtlCeaillt.*h! JA-+Uc.t. %o,-Jf. +19o7t\0> <'w8*4 B^**t-s**t'*. 15S: Conference of Governments! Industrial R cutsU far s a m - -fcg U.S.C. C53>, t 1518.55 or TIUe 19. Code K In addition to complying with the ;bf Federal Regulations, is h ereb y Hygienists (ACGIH), it Is hereby deter mined that (1) exposure under the pres Sglremcnts of f 14S.2 of thin chapter, rrmended In the manner Indicated be- ent standard for asbestos dust in Tabic such requtit shall cental: : t ow in order to prescribe a new Etand- G-3, { 1910.93. of 12 fibers per milliliter F-eculte of tests and asxa 6 on: Ihrd limiting the exposure of workers to greater than 5 microns In length or 2 u ) Tire minocycline hydr chloride 'asbestos dust. The new standard llmit- million particles per cubic foot of n!r, $ in mating the ba^ch for potency, 'ing the exposure of employees to asbes- which is derived from an established Fed .ijcy. moisture, pH, minocycline cem- :tos dust 1s that adopted under section eral standard promulgated under the identlty, and crystallinity,1 F6(c) of the tYliliams-Stelger Occupa V.'aish-Hesley Public Contracts Act on Tl-.e *e. batch fof potency V ar.d tional Safety and Health Act of 1970 fend published in the F n t w i Register May 2D, 19C9, constitutes a grave danger to employees exposed to this E-hcur Samples required 1 pr. this date. The standard is hereby de- time-weighted average cor.centraticn' 5. The mtareyclini hydrochloride termined to be more effective than that and that (2) an emergency rtr.ndard Is 'In m titag the balph: 10 packages, presently provided under { 1516.55 to necessary to protect employees from th is containing EPp^XiTT ately 300 the extent that It prescribes minimum excessive exposure. The National Ins',:- fib grams. levels of exposure to asbestos dust. Pute for Occupational Safety and Hcr-'t;: b) The batch: X minimum ot Therefore, by operation of section 4(b) concurs that the proposed change in U,e (2) of the Act the new standard issued f_shcstos dust rtand-prd recommended b- psules. `j rb) Tests end mriheyi*. of csscy--(1) under section 6(c! supersedes the confetructlon miety standard relating to ex the American Conference of Govcrrmentnl Industrial Hygienisty shculd be th.e 'tim er. Proceed as directed In f H I.ill posure to asbestos dust, `f this chapter, prep ing the cample substantial base for the emergency h- assay as follows: PI je a representa- j Section 1518 55 Is hereby amended by jedding a new paragraph (c) thereto. As standard. Action concerning the standard will be ip; number of capsules ito t high-speed fos blender Jar wit rufhclent 0.1A' amended 5 151E.55 reads as follows: commenced under section 6(b) In the 'Krochloric add to glveji stoctfsolution ; 1518.55 Cum-*, vupcrri, fum m , diiMn, Immediate future. Any notice of pro posed rulemaking unacr seclicn 6tb) w:'.l srenlent concentr^ion ctfcuining a n d tm*U- give notice of the emergency standard lees than 150 mlCTcfcTams m mino as a proposed rule and also of any ap rine per milliliter (estimated!. Blend | (c> Paragraphs <a) and (b) of this sec propriate subsidiary proposals which may 3 to E minutes. Eepjove an aliquot tion do not apply to the exposure of em-, be required under subparagraphs (5) ar.d ^further dilute with ,1M potassium f loyees to airborne asbestos dust. When- (7) of section 6(b) relating to the ex jphate bufler, pH <i (solution <), to rer any employee Is exposed to airborne posure of employees to toxic substances -hR' reference concent: Uoq of 0.100 frogrtm of minocycl . per milliliter Lvbosto6 {lust, the requirements' of Part 1910 is amended as follows: S imated). } 1910.93a of this title shah apply. 1. Table G-3 following { 1910 93 (30 PR. 15104, Aug. 13. 1971) Is hereby ; M o U i u r e . Proci directed In ! Effective date. This amendment Ehall amended by deleting the following: '"LJW2 of th is ch ap te r1} e rne eSectlve upon publication In the A sbestos-- 13 fibers p er m lllU tliT g r rs te r tb s a ivta. supplied by th si manufacturer rap R ccisrex (1 2 -7 -7 1 ). E m ic ro o s Ja le n g th o r __________ 2 Vippct. reining the subject E-atibiotlc hare T rem o ilte _____________t Nippon 20mg .'JP 7 evaluated. Stare th tcondltlfcns pre- 4(b)(2), W BUt 1EM, 73 t/6C, E53; ' -3 SSO, _ k crrUvry' O rd er h'o. 13-71, JO T i t . 8764) 1 1 \ Mr KD,r35----t 1 f|seDctllAAtt IKA3TIA VOL 3 4 , NO. 534-- TUESOAT, DECEME.EE 7, I H *. \ :; T / \ \ L A- 34 0J-- Ul/iU-v^ fr ' (,`r^lAiKv (, ' LfcTi t ,, Q'.L' (ioi*J rtiuO. Vppcf Mt'M < Wrr.t'W1* ^(Oh- rrc^M-i ............... Via.'Mi OMN<J/lAl t**>* H C>* `'fckl'l^ from IK mim w mt** brroul** ior 7 t r*K f* rvlnii*-*! frorr. th tor* TTCi-V fef QU4TU. Arv~ ,ic'i., tarlVtlx NHur*l c* it*/*.*<<j*t*rlh .... . . . . . . '-aitn; rr>v MW...... ......................... fV*jmot>r......................... T ........................ . i'^rikAlj coirmi.... . . . . . . *i r^r^'DInjttuTftJ'i ...... . .. . ( r>U4o-*t fraction l~**Uv*.t1% ............ \-rpvt iK*Jr%I^ t*W'> ., 2C f^ rrtV * ;S}0, 20 20 `n if ltt us^c to neel the icxpocure lim it: preatritied la paragTBpij ta> 0. tw i tcXJoQ. \Vntrrt. rush engiaecrtr.r methods are not feasible, or do not otherrtae reduce Uie conccKtraaoos below thoee prescribed in paragr&ph. la) ol this section, roepira ter? protective devices ahah be provided and used la tecordaxicc with paracrRpb com ply w ith th* r e q u i r e m d ^ C' t h ^ e rubr-crorrapbi reiattcg to Ui( o-- j, Involved. T h e re q u irrm e r.'^ 4 thL- p ^ . graph t r i In tdditior. to th o 4 prejeribed in parag rap h (b) of this sectifa. (2) All h if ill- e r p ew er-opi rated tools w hich produce a b erlo 'dust fuch t-i t u t n o t lim ited to, saws, oort|-,, t h r i v e (c) ol Ihi! section, j v h e d s , and driils'shall be p rf rided vnth (C X I) U) ViTier.i the lim its o f e x local e x h a u st venU leU oa t.r<- duxt ccl- posure to asbestos [dust prescribed in P4TET8ph (ft) o i tills sectio n a re ex ceeded and when engineering controls k-ctor* in accordance with u l A m erican R ational S tfta d trd FUndamiv.Udc G ov erning the Design and O peration of Local re q u ire d by p a ra g ra p h (b) ol th is sectio a E x h a u s t Bys1n! : fJv'S l ZF J t-i i gq i, are n o t leaslble or do not otherw ise re (3) Em ployees exposed tc- l t d sprcylr.g duce th e c o n c e n tra tio n of asb esto s dU it ot asbe.<to6 o r th e d tro o lltio n of pipe*, below thoGe p rescrib ed In p a ra c r a p h ( t ) ttru c tu re s . o r e r r i pm m l co v erei c r Ln- o f th is freedcm, th e em ployer c h ill r e eulate-d w ith usbestoo a h tll be provided quire the use ol respiratory protective d t- w ith respiratory protective e ric in Mces. T h e selectio n of reap d raio ry a c c o rd a r . w ith p e r a g i t p h , <c) (<) cf protect! ve d e u c e s shx.ll be lim ite d to th is sectio n . , [I those epectiled la th e rem aining rub- (e) Asbestos cement, raortm-, coe.tir.es. paragraphs of this jrkragraph fc), grout, and plaster thall be* tclxed In enctihl) emThpeloyeemeptleosyterh, itsh&rclfltprleraqbuoirrey pthroa-t . closed bags or other container^ tectlve device biTore eweh use In order (f) Axbeeto w aste and e c 4 P rhs.il be to Insure a proper fit according to the co*.lted an d d is p o itd of tn f r U td t ; s manufacturer' Instruction*. The t r n- o r o th e r con ta ln e re . plojxr ahsi) further provide for eCectire (g) A ll cler-r.up of cst-esto d u s t an d Irrri p \*ul<A)r* Dlit. F^tVvUr ?***Uaft............ Tfi-U- tRt........................ s'oTt- (V*'T**T<'r. (vUir*'-- s Irrt;U on - pc-'tfcl** <.f. U e-j'M ( tc U R I 1 cubi'* n.fU r training cr eupcrrltion of employees In the tectmg of respiratory protective de vices for fit before their use. ( 2 ) For an atmeephero containing r.ot more than 25 fibers per mil'.Illter grec-ter than i microns in length erver tn g-hour avert-ge, or more than 50 fibers per mllil- blowing shall be perfcrrr.ei dear.ere. Ko dry sweeping ijp.'J tc per formed. 2. Section JF10.12 k c n ir .d e d by c!ic.r.itr,c p a r o r r a p h (ft) In c r i c r to ft ' th e em ergency r - e n in r d prL.ro/ br-c lr. th e , r.cw t 191C.936, w h ich k p u b lk | s c in. t-V.s '. * Mi'MftM.'oi '*r**4rftYHMw;nt*(1vifyculiMhel*ff>tc;ldoU' v*-lhH\ l&Vtl ot * 7 i r prcv^n't^ o r rj**lxiinf rJ.^ 4 In Ih* tt.u; `. v* 0 * <in*rnilM Imm *iM*vUf* Mwupw *i- -*,< ir. *.v*r b^lin<*rr 1 })|rh, riliff in*tlir*W hftfA |uv*n a.'. **r. lot*- J A* (Utw'.'t'J ty ih* riirnibrfrrt Hltrr method 4 <' >vr*w- -c-.tnjl c.4^VffcV>n. - r fwnrfntrttlon ind t*rc*n; <juirli lor lb**ppM- V-,-. rrftMllr/l *xt tol* Itf.m Ih frJwHJo'i *! f iir-v'jocior will U.* foilv^ioc clmr ic'crWUca liter ever any period of 15 minute?, a reusable or Ingle-use filter type res pi re- tor. operating with ' negative pressure' during the Inhalation phase of breathing, approved by the U J5. Burt^u of liin e s under the provtsior.s of SO Part l< (E'urean ol Mints Schedult- 21B ) , or a valveless respirator providixg equivalent doc undent, to c o n stru c tio n w e t : w hich Is tu b jc c i to th e A ct, T h e a m e n d m e n t is necrssr.ry In lig h t o f the r u l e ^ f r c r u 's - lory ccm structicn ect fo rth In i 1i 10.5(c!. As &fiicniied, l 1S10.12 reads Is follow s. f 1916.12 Coeurts-ucUoft worvd (8 )(f) Adoption end erifr.it on c-f es- protection, thail be used, j tc b llih jt i tc .lttv end LeclfA f'icndcrds f --.-Iv intu- Utn.rtrr . - if *,} *\'',rp ) Prfi**ftl fVn*h [ **Wloi 13) Pot an atmoephert cdntrJLnine not more than 250 fibers per n i l liter greater Than 5 rrjerons in length cstir an E-hour j e r construction. The jtm cl rds prefcrifce-i by Part 363E of this tlUe ar.d in effect pn AprB- 28, 1971, ftrt adcpled u average, o: more than 5(t) fibers per cccupstlor.iil safety cr health rtm d a -is milliliter over any period ol 15 minutes, under section 6 (a) of the A c -'m d ahf.'.i r, powered filter poidlivr resiure res apply, Recording to Lhc r.-ovirlons pirator approved by the U .. Burecn d! thereof, to every employment and p'r.ce Mlr.es under the provision^ of 30 CB R of cmplojtr.cAt of every trr.fi cyec en *! 1r r *.j-.*t !. iiM'Irr U\i< l'.<* rrrt U> lt>r \i.w ^f Part M (Bure?.u of Mines Schedule 21B) t *. Y\ ii II th* !tfc**vlon ol coii rhsll be used. `11! 1.`-till'.! *rlk MJlr liir fc-'*CtUr`\]\>P.`*4'>C (4 > For an atmosphere containing \ ihil ol J I In !>, lor ^>5*icl Ui 6 Mjl more Uian 250 fiber* ferr m illiliter gaged In construction w o rt .'sich em ployer shall protect the craploj-ncnt end ple-ces of employment of ee. `h of his employees engaged In eor-struopion work 2 i. w a - t 1910 93ft Is added to P f.rt greater than 5 mlcrocis la length over by compiling with the appropriate J910 T h e new 1910.93ft re a d s ft-s an 8-hour average a tv-pe C pxltivv: pres ttandsTils prescribed by this piragraph lo liow s: K I ' l l 0 .^3ii A .lie.tm d iu l. ' a > Tlie 8-hottr tim e-w eigh tod aserAgc airborne concerrVrftllon o asbesto diLst, u w hich em ployeen a rc expoeod sure rupplied-eJr respirator approved by the U . Bureau of Mines under the pro visions of 30 C F R Part 12( (Bureau of Mines Pehe-d(he ifiB) xhall be uj-sd. (5 ) The employer shall |establish ft respirator program In accordance with (2i Tlie rta n d a rd s p resirib ed In { 161E.55(c) Of th is title ih ejfi apply in th e case of th e exposure of I,any em ployee In construction work ttf airborne asbestos dust. | >-hUl not exceed 5 fib ers p er m illilite r rreaurr than 5 m icrons in Icnctb. as detrrm ined by the m em brance filter ineU uvl a t 00-450 X UlRgnlficaUon (4 I'Milnnrber objroilvc) phase c o n tra st tlie requlrernents of American iiatianal Standard Practice for Respiratory Pro tection ZE8-2-- 3069. (61 The respirators provided each em ployee shall be properly inspected, F ie rtlv e dofe. These amendments fthfdl become effective ImmediEtely upon pubilcsUoa in the FkrriuL Krcrrurv. (13- 7- 7 1 ). : i.im nlntllon. Concentra,tinas above 6 lM-pi jr>r m illiliter b u t. n o t to exceed 10 clcRned. repaired and stored... <d> (1 ) When tn cuploytr has em (Sec. 6 (e ). M 9-Jit. 1S9. 5 D E C . -5: ^vrvtftrr' O rd er Ko. 12-71, SC P J l . B7M) f.heis per mllSilitej. m ay be perm itted np to n to tal o l 15 rm o u te s In an h o u r io r to 5 hours In an 8 -h o u r day. 'b> EnfdnecrinK m eth o d :, such as b u t it iim '.ed lo. en clocare, v acuum sw eep- ,:. and local e x h a u st v en tila tio n , sh a ll ployees who arcVxposed to aibe^tos dust exceeding the U.-klt* prescribed in. para graph (ft) of t h i frctUm nd the ex posure results fre^n the operetloa* deecrlbed In the realainlng tubparagrwphs of this poragrapb/d), the employer ahall S ig n ed n l 'W ashington, D.C:. Lhls 2d day of December 1971. O. C. Otnorrerr., / . 'fistar.t Secretary o/^ficbcr'. ( r p . r : 7 1 - i T t s s r u e d ia -s-7 1 ;i6f|ft7< 1 ! ftocnAi o i j r t r . vol sc. fio. 251-- rotsoxY, p tc ie -.m r, i n i ! A- 35