Document RJyNgBRGkDpaYJoQ9vJy1MLNB

i 1910.1000 Title 29--Labor Subpart Z--Toxic and Hazardous Substances Bounce: 39 FR 23302, June 27, 1974, unless otherwise noted. Redesignated at 40 FR 27073. May 28, 1975. 1910.1000 Air contaminants. An employee's exposure to any mate rial listed In table Zr-1, Z-2, or Z-3 of this section shall be limited In accord ance with the requirements of the follow ing paragraphs of this section. (a) Table z-1: (1) Materials with names preceded by "C"--Ceiling Values. An employee's ex posure to any material In table Z-1, the name of which is preceded by a "C" (e.g,, C Boron trifluoride), shall at no time exceed the celling value given for that material In the table. (2) Other materials--S-hour time weighted averages. An employee's expo sure to any material In table Z-1. the name of which Is not preceded by "C", in any 8-hour work shift of a 40-hour work week, shall not exceed the 8-hour time weighted average given for that material in the table. (b) Table Z-2: (1) 8-hour time weighted averages. An employee's exposure to any material listed In table Z-2, In any 8-hour work Bhlft of a 40-hour work week, shall pot exceed the 8-hour time weighted average limit given for that material in the table. (2) Acceptable ceiling concentrations. An employee's exposure to a material listed in table Z-2 shall not exceed at any time during an 8-hour shift the ac ceptable ceiling concentration 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 In the column under "acceptable maximum peak above the acceptable celling concentration for an 8-hour shift". (3) Example. During an 8-hour work shift, an employee may be exposed to a concentration of Benzene above 25 p.p.m, (but never above 50 p.pm.) only for a maximum period of 10 minutes. Such ex posure must be compensated by expo sures to concentrations less thnn lo p.pm. so that the cumulative exposure for the entire 8-hour work shift does not exceed a weighted average of 10 p.pm. (c) Table Z-3: An employee's expo sure to any material listed in table Z-3, In any 8-hour work shift of a 40-hour 504 Chapter XVII--Occupational Safety and Health Admin. $ 1910.1000 work week, shall not exceed the E-hour time weighted average limit given for that material In the table. (d) Computation formulae: (1) (1) The cumulative exposure for an 8-hour work shift shall be computed as fallows: r=c.r.+7r+ ... c.r. Where: r Is the equivalent expo*ore for the work ing shift. O Is the concentration during an; period of time T where the concentration remains constant. T is the duration In hours at the exposure at the concentration C. The value of E shall not exceed the 8- hour time weighted average limit In table Z-l, Z-2, or Z-3 for the material Involved. (U) To Illustrate the formula pre scribed In subdivision (1) of thin subpara graph. note that isoamyl acetate has an 8-hour time weighted average limit of 100 p.p-m. (table Z-l), Assume that an employee Is subject to the following exposure: Two hours exposure at 160 p.pm. Two hours exposure at 76 p.pxa. Four hours exposure at 60 p.p.m. Substituting this Information In the formula, we have 2X160-1-2X75+4X60 -----------------------------------=81.25 p.p.m. 8 Since 81.25 p.pm. Is less than 100 p.pxa., the 8-hour time weighted average limit, the exposure Is acceptable. (2) (1) In case of a mixture of air con taminants an employer shall compute the equivalent exposure as follows: c, c, c. L, L, L. Whera: E. Is the equivalent exposure for the mixture. O 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 E shall not exceed unity (1). (11) To Illustrate the formula pre scribed In subdivision (1) of thin sub- paragraph, consider the following exposures: Material Actual ecu- centmlon of g-hotir exposure 8-hour Urn* weighted average exposure limit Acetone (Table 2-1)........... 600 p.p.m*__ 1,000p.p.m. 2-fiutaaone (Tab!** Z*l)__ 43p.p-m.*._ 200 p.p.m. Toluene (Table Z-2)..........40 p.pjh,.*. 200p,pjn. Substituting In the formula, we have: 500 45 40 E- =-------- +----- +----- 1.009 200 200 E_=0.600 + 0.225 + 0.200 E=0.925 Since E,, is less than unity (1). the expo sure combination is within acceptable limits. (e) To achieve compliance with para graph (a) through (d) of this section, administrative or engineering controls must first be determined and Imple mented whenever feasible. When such controls are not feasible to achieve full compliance, protective equipment or any other protective measures shall be used to keep the exposure of employees to air contaminants within the limits pre scribed In this section. Any equipment and/or technical measures used for thi purpose must be approved for each par ticular use by a competent Industrial hygienist or other technically qualified person. Whenever respirators are used, their use shall comply with g 1910.134. Table Z-l Substance p.p.m.* Acetaldehyde........................... 200 360 Acetic odd................................... Acetic anhydride........................ 10 5 23 20 Acetone........................................ 1,000 2.400 Acetonitrile................................. 40 70 Acetvlene dichlortde, see 1, 2- Dlchloroethylrne.................. .. Acetylene tetribromlde........ Acrolein....................................... 1 <n 14 0.2S Acrylamide--Skin..*,,......... .... 0.3 Acrylonitrile-- Skin..................... 20 43 Aldrln--Skin................................. 0.26 Allyl elcohol--Skis...,............. 2 6 Allyl chloride........................ 1 3 "C Allyl clycldyl ether (A O E). 10 43 Allyl propvl disulfide................ 2 12 2*Amlnoethano). see Ethanol- alUmlliinllef,.,...,....................... ........................................................ J*Ainlnopyridlw........................ 0.6 2 `Ammonia................................ 60 36 Ammonium aulfamate (Ani mate).................. . n-Amyl acetate............................ 100 626 aee-Antyl acetate......................... 12S 630 Aniline--Skin............................. 6 19 Anlaldlne (o. p-Isomers)--Skin... ... a 6 Antimony and compound] (aa Sb)........................................ 8*b footnote* it end of tablo. R&S 100345 505 4 1910.1000 Title 29--Labor Table Z-l--Continued Table Z~\--Continued Sub;itn:e p.pjn.* mc./M* ` Substance p.pjn.* mg./M* S' ........I $ 0t- AS'TU (alpha naphthyl thiiur*!) - -. - -. .............. Arsenic and compcunds (as As). Ars.re........................... *............. Ai:r.rh-methyi--Skin........ B'tT.uw (soluble compounds)... p-berto'iutnon", see Qulnone*. B*moyl peroxide.,..................... chloride.,-,....... *-...*. Elt'.er.yl, see DiPhoyl........ Btsyhe.no! A, see Dlglyeidyl a as 03 Coal tar Pitch volatiles (benrenn soluble fraction) anthra 0.5 cene. BivP phenanthrene, 0a.22 acridine. chrysene, pyiene.... Cobalt, metal fume and dust-- as Copper fume......... ..--........ l>ustsand Mists..*.............. Cotton dust (raw)..*............... Craplp herbicide ....--.... CresoT (all Isomers)--Skin...**. 5 Crotonaldehyde................ .--* 2 Cumene--Skin..*...................... 60 as al ai i 18 22 6 245 Rcror. oxide.......... .*.,.................. C Bor^n trlOuorlde.*................. Bromine,.............................. Brcmoform--Skin............... .... Butadiene (1. O-tutsdlpne)..... Butane thiol, see butyl mer captan........... *.................... . l at as 1,000 15 3 0.7 5 2,200 Cyanfde (as CN)--Skin......... Cyclohexane........-----*....._ Cyclohexanol___ ....--........ Cyclohexanone***...-- Cyciohexene...... ............. . Cyclopentadiene............... 2. 4-D........................................... 300 to 60 300 76 5 1.050 200 200 1,015 200 10 2-Puianone...................... 200 690 DDT--Skin................................. 2-Putory ethanol (Butyl Celiwol**)--Skin, .***................... Butyl scutate (n-butyl acetate). so 150 DDVP. see Dlchlorvos......... 240 Decahomne--Skin.............. . 710 DemetonS' Skin........... a 05 a3 ai yec-Butyl acetate............ ............ * tert-Butyl acetate.......... 200 200 950 950 Diacetone alcohol (4-hydrory* 4-met hy l-2-pent anone)--..... 60 240 Bury! alcohol................... 100 300 1.2-diaminoethane, see ec*Buty) alcohol.......... tervBctyl alcohol.......... .. 150 100 450 300 Ethylenediamlne........... ....... Dlaxomcthane.................. a2 a4 C Butylarolne--St in........... C tert-Butyl chromate (as CrOt'--Skin................................ s 16 Diborane............ ai Dibutylphthalate.............. ai C o-Dlchlorobenine........... 60 ai s 300 n-Eutyl glycidyl ether (BQE).. Butyl mercaptan........... 50 10 270 p*Dlchlorohentene...................... 75 450 35 Dlchlorodffluoromethane-----... 1,000 8, SUO p^e:t*Butyltoluene,,................... 10 60 1,3*D tch 1oro-6.fi-dlmetby1 Calcium arsenate........................... 1 hydantoln.. .......................... a Calcium oxide............................... . 6 ^l.FDlehloroethane,............ 100 400 `Camphor..*.............. ............... Caroaryl (3evia )_................... . ........ Y"` 1.2*Dichloroethylene* -............ 200 C Dichloroethyl ether--Skin... 16 790 90 Carbon black............. ................... . 3.6 Dlchloromethane. see Carbon dioxide............................. A ooo Carbon monoxide__ ....---------- 60 C'Scrdane-- Skin....*.,............... Cr.lonnated camphene--Skin. Chlorinated diphenyl oxide.------ Chlorine......................... ............. Cnhrtn* dlnxlde.. 1 ai C Chlorine trifluoride.___ ..... M C Chioroacetaldehyde................. 1 *-Chioroacetophenone (phenacylchlcrjde)*.......... a os Chlorobenzene (monocbloro* benzene)..................... ......... 76 9,00606 as as as 3 0.3 a4 3 a3 350 Methylenrchiorlde...... Dlchloromonofluoromethane... C l.l*D!chlor(M*nitTOfthane.... 1.2-Dlchloroprnpane. see Propylencdlchloride.......... Dlchlorotetrafluoroethane...... Dlchlorvos (DDVP)--Skin..... DJ^drln--Skin.....*................ Dlethylamine....................... . Dlrthylamlno ethanol--Skin... Dlethylether, see Ethyl ether.. Difluorodibromomethane.......... C Dlclyddyl ether (DOE).*... 1,000 10 1.000 25 10 100 as 4,200 60 7,000 1 a 25 76 60 "mo" 2-ft O-Chlnrobenrylldeo malononltrtle (OCBM)....w CMorohromom*thane ......... 2-Ch'orM,.Vljuladiene. so-* Chloroprene........... Cblnrodjphenyi (42 percent Chlorine)--Sirin.......... a 06 200 0.4 1,0(0 1 Dfhydroxybenxene, ree 7i ydroqulnonc____________ ,... ,,, ___ Dllsobutvl ketone*.--.._*i... 60 Dhsopropylatnlne--Skin...----- 6 Dtmethoxymethane, see Mcthylal...................................... Dimethyl acetamide--Skin...., 10 . ... 290 20 36 -*c Chlorodlphenyl (54 percent Dlmcthylamlne............. . 10 19 Chlorine)--Skin................... . as Dimethylamlnobentene, see l^hlnro,?,3^poxypropaneT see Xylldene................................. . Epichlorhydrtn............. ........ 3-CbJoroethanol, see Ethylene chlorohydrin.................. Cbloroethylene, see Vinyl chloride............. ................ Dlmethylanlline(N-dlroetbyl- aniline)--Skin.* *......------ Dlmpthylbentene, see Xylene. Dimethyl i.2-dlh70mo-2,2-dlchloroetnyl phosphate. (Dlbrom). t 28 methane)___......__ ______ _ 80 240 Di".jethyl/ormamide--6kin._._ 10 30 1-Chloro-]*nitropropane........ 20 100 2,6-Dlmethylhfptanone. m Cbloropicrin___ ............... 0,1 a? Ullsobutyl ketone_____ ____ ___ Cbloroprene (2-chloro-l,3- 1.1-Dltnethylhydmino--Skim*. as 1 boUdl.ne)--Skin 28 90 Dlmethylphthalate. ______ ....... 6 Cbnmluo. u>l. chromic. Dime: hylsu Hate--Sktn......... . t > chromntw aalLs a.i Or____*___ as Dlnltrobemene (all isomers)-- Metal and irjol. salts..#............... Skin................................................... See footnote* at end of table. See footnotes at end of table. 506 4-1 *iS K 30 So CO o o CO CD Chapter XVII--Occupational Safety and Health Admin. 1910.1000 Tabli Z~l---Continued Table Z~1--Continued Substance p.p.m." mg./M1 * Substance p.p.m.* teg./M* * Dlr.itroo-crrssl--Skin*. *............ Din! ire-toluene--Skin............... Dicuuif (Dlnhylcue dioxide)-- Skm.......................................... IX Dic.-^r.yl.................. .................. 0.2 Diphepylmeihane diisocyaaste Ur? Methylene blsohcnyl isocyanate (MDI)....................... Dipropylen? glycol methyl *tier--Skin.............................. IX Dl*s*c. octyl phthftlate (DI-2- ethylh?tyiphthalftie).,. ....... Endrin--Skin..,....... ............... Eptshiorhydrln--Skin... ....... EPS--Skin................................... 1.2-EporrprtTpflne, see Propyleneoilde.___ _________ 2.3-Epoiy-l-propafiol. sm Glrcldol........................ ----. EtbinethloJ, sec Eihylmer* eaptan........................................ Etbvtolamlne........................... 3 2'EthoxyeihAnol*-8kln___..... 200 2-Etboxypthylacetate (Cello- soire acetate)--6fcln........... ... 100 Ethyl acetate._...................... . 4X Ethyl seriate--Skin........ 25 Ethyl alcohol (ethanol)........ 1.000 E thy '.am lne._. ...................... 10 Ethyl sec*emyl ketone (5- m?thyl-3-beptanone). 25 Ethyl beniene........................ IX Ethyl bromide...................... 200 Ethyl butyl ketone (3* Beptaoone).......------------ 1. X Ethyl chloride........................ 1,000 Ethyl ether...........................- 400 Ethyl formate*............. C Ethyl mercaptan.-.--..*..** Ethyl silicate............. .............. 100 10 IX Ethylene chlorohydrtn--Skin.. 5 Ethylenediamlne............. .... 10 Ethylen* dlbromlde. see 1.2- Dioromoethane..... ................. - Ethylen* dichloride, see 1,2- Dtchloroethane................... . C Etnylene plycol dlnltmte and/or Nitroglycerin-^Skin... *as Ethylene glycol monomethyl eth'r acetate, sec Methyl ceUoaolTe acetate............. Ethylene lmlne--Skin................ Ethylene oxide...-.,................. 0.6 x Ethylldine chloride, see 1,1* Dlchloroethane.................--. N*Eihylmorphollne--Skin.--.. Ferbam.......................... ....... Errroranadlum dust............ Fluoride (as F)_..*. Ficorine...... ................... 0.1 Fluoroirtchloromethane. ....... U000 Formic acid...............-- 6 Enriurml--Skin...*......... Enriuryl alcohol.................. X6 Glyridoj <2,3-Epoty-lpropanoll.......... . X Glycol monoethyl ether, see 2'EthnxyethanoI..... ................... Gnthlon see Ailnphoe- m*thyl............ ........................ . Hafnium....................... ......... Eeptachlor--Akin...-*-**. ..*.*--. Heptane (n heptane)............ . 500 Beiachlnroethane--Skin.......... i Herachloronaphthalene--fikln____ Beune (n-heiane)................. 5X J-Seranone........ IX Bet on** (Methyl bobmtyl ketone)__ .................. IX eo-Hfiyl acetate............... X fee* footnote at end of table. 0.2 1.5 300 1 000 6 0,1 19 as 0 740 540 X.4X IX 1,900 18 IX 435 890 230 2,600 1.2X 300 25 850 16 25 1 X 94 15 1 Za25 0,000 9 20 200 IX 0.5 2,000 10 0.2 1V8X 410 410 300 nydrmlne~9kln..................... .. \ Hydrogen bromide......... 3 C Hydrocen chloride................. 6 Hydrogen cyanide--Skin........... 10 Hydrogen peroxide (90%)......... 1 Hynrocen sclcnlde...................... a 05 Hydroqnlnone................... ......... C Iodine.................. .................... 0.1 Iron oxide Jume...... .................. Isoamyl acetate......................... IX Isoamyl alcohol....... .................... 100 Isobutyl acetate........... ............ IX Isobutyl alcohol................ IX Isophorooe........... ............. .......... 25 Isopropyl acetate...____ ______ 2X Isopropyl alcohol................ ........ 4X Isopropylamlne 6 Isopropylelher..... ....................... 6X Isopropyl glyddyl ether (IG). X Ketene............. ............................ as Lead arsenate..............___ Lindane--Bklrv . _________________ Lithium hydride......_________ __ .... L.P.G. (liquified petroleum Rfts)............................................ 1,000 Magnesium oxide fume,.,,--.......... Malathlon--Skin.................................. Maleic anhydride.................. 0.25 C Manganese.... ........ ............ . Mesityl oxide.... ........ .............. 25 Methanethlol, see Methyl mercaptan____ ............ Methoxychlor....... ............. 2-Methoiyethanol, see Methyl eeUosolTe..................... Methyl acetate................. . 2X Methyl acetylene (propyne),.... 11,,000X0 Methyl acetylene-propadlene mixture (MAPP)...................... 1,000 Methyl acrylate--Skin.......... 10 Methylal (dlmethoxyincthaoe) *.. 11*,O0X Methyl alcohol (methanol).__.. 2X Methylamine...,............ . 10 Methyl amyl alcohol, see Methyl Isobutyl carblnol.......... Methyl (n-arayl) ketone (2- Heptanone).................. IX C Methyl bromide--Skin....... 20 Methyl butyl ketone, see 2- Hexanone.................... ............ Methyl cellosoWe--Skin........ 25 Methyl cellosolve acetate--6kia 25 Methyl chloroform__........... 3X Methylcyclohexane........... . XO Methylcyclohexanol................ IX o*Methy1ryclohexanone--Skin-. 100 Methyl ethyl ketone (MEK), see 2-Hutanone............... Methyl formate.......**.,...... IX Methyl iodide--Skin. ................ 5 Methyl Isobutyl earblnol-- Skin. 25 Methyl isobutyl ketone, see Hex one. Methyl Isocyanete--Skin______ a 03 C Methyl mercaptan__________ 10 Methyl methacrylate__________ IX Methyl propyl ketono, aee 2- Ca Methylstyrene.................... C Methylene blsphenyl Isocyanate (MDI)... Molybdenum; Soluble compounds___________ Insoluble compounds.......... Monomethyl anlJIne--Skin____ C Monomeibyl hydrailne-- Skin.......................................... MorphoIlne^Skln....___ ....-- Naphtha (coeltar)....... ............ Naphthalone............. -.............. IX a 02 2 0.2 20 IX 10 See footnotes et end of table. L3 10 7 11 1,4 a: 2 l 10 525 360 700 300 IX OX 980 12 2.100 240 ao aa615 aC25 L8X 15 161 6 IX 15 110 1.150 1.MIQ 35 8,11*1 2X 12 465 X X IX 1,900 7, OX 470 460 250 28 IX a 20 410 480 a2 6 15 9 0. 70 4X X 507 R&S 100348 1910.1000 Tasli Z-l--Continued Title 29--Labor TiSLt Z-l--Continued SubitAnce p.p.tn.* jnc./M* * SubstAnce p.p.m.* tte./U* * Nickel carbonyl..................... a ooi Nickel, tnet&l and soluble cmpds, a; N!.............................. Nicotine--Skin............................. Nitric add........ .......................... 2 Nitric oxide...... ...............-.......... 2$ p-NItroanlllne--Skin.................. Nltrobenxene-- Skin................... p-.S'tlrochlorobeaxeae--6 kin-----Nltroethane. 1 1 100 Nitrogen dioxide......................... Nitrogen trlfluorlde,...... ............. N1troglyced n--Skin.................. Nltrometbans.............. .............. 1-NItropropane............................ 2-NItropropane........................ 6 10 0.2 100 23 25 Nltrotoluene-- Skin................. -- 5 NltrottichlorometbAtM, see Chloroplcrin--........................... Octarhloronapbthalene--Skin... Octane..................... -................ too Oil mist, tnlncnl...... .................. Osmium tetrodde........................ Oxalic add.................................... Oxygen difluorlde.------ ----- .... aot Oxone........................................... 0.1 Paraquat--Skin............ ............ Parathion--Stm--..................... PenUborane.............................. Penteen loronaphthalene--Skin.. aoot penlachloro phenol--Skin......................... Pentane...................................... 1.000 2-Penlanone................................ 200 perehloromethyl mercaptan-- 0.1 Perchloryl fluoride...................... 3 Petroleum distill ites (naphtha). WO Phenol--Skirt-............................ t p-Phenylene diamine--Skin...... ................ Phenyl ether (vabor)................. Phenyl ether-biphenyl 1 mixture (vapor)....................... 1 Phenylethylene, see Styrene--................. Phenylglycidylether (POE)... 10 Fhenylhydtaxlne--Sktn........--. t phosdnn (Mevinpbos <$i )-- Skin........................................................... Phosgene (carbonyl chloride).-. Phosphine............. ...... ............. Phosphoric add................... ....... 01 03 Phosphorus (yellow)............. ... Fhosphorus penlachlorlde-------- Phosphorus pentasulfide--....... PhosDhoros trichloride.............. 03 Phthallc enhydrlde.................. 2 Picric add--Skin........................ Fleal (2-Plvalyl-l,3Indandlone).............................. Platinum {Soluble salts) as Pt--....................................... Propargyl alcohol--Skin--..... Ptopane............................. n-Propyl acetate--............ . 1,000 200 propyl eleohol......................... n-Prnpyl nitrate...................... 200 25 Propylene dtchlodde............... 73 Propylene Imlne--Ektn.......... 2 Propylene oxide....................... Pmoyne, see Metbylaectylene Fyr*thrum......... ..................... 100 _________ Pyridine................................... 5 Qulnone................. ...................... (k 1 RDX-Bkln................................................... Rhodituu, Metal tame and dusts, as Rh..... .................................... ... Soluble salts..... ........... ......................... ... Ronnel........................................................... Rotenone (commercial)................................ Selenium compounds (as Be)......... -........... . Selenium hexafluoride................ 0.03 See footnote* at end of table. 0.007 1 0.6 5 30 6 5 1 310 0 29 2 250 00 90 30 0.1 2,330 0002 1 01 02 06 on OOl 0.6 06 2.930 70a0 s 13.6 2,000 19 01 7 60 22 01 04 04 1 01 1 1 3 12 01 ai 0002 1,800 840 600 110 330 5 240 6 16 04 L6 01 a ool 10 6 0.2 04 Silver, metal and soluble com pounds. Sodium fluoroacetate (10SO)-- OOl Skin............................................................... 0 03 Sodium hydroxide--....................................... Sllblne.......................................... 01 I 06 Stoddard solvent.................... 600 2,930 Strychnine...................................... ............. -- 0 IS SuKur dioxide--.......................... 3 13 Suliur hexafluoride.................... 1,000 0000 Bulimic acid.............................................. . Suliur monochloride................... 1 Eultur pentafluotlde................. 0.023 Bultury! fluoride--....................... 3 1 6 02S 20 Svsioi, see Demeton ..................................................... 2.4.5T..................................-............................ 10 Tantalum......................................................... 3 TEDP-Skin.................... ............................. bdlurlum......................................................... "ellurtum hexafluoride..--.... 002 02 01 02 TEPP-Skln................................................... 006 C Terphenyls............................. .,1.1.2-Tetrachloro-2,2dlflo oro- ethane.*....... ............. 1,1.2,2-Tetracliloro'l^-dlflooro- 1 600 9 4,370 ethanc....................................... 600 4,170 1,1,2,2'Tetrachloroethane--Skin 6 33 Tetrachloroethyleat. see Pet- chloroethylene........................................................... ...... Tetrsehloromelhaoe, a*e Carbon tetrachloride.................................................................. . Tetrachloronaphthalene--Skin................. 2 Tetraethyl lead (as Fb)--Skin____________ 0076 Tetrahydrofuran........................ 200 690 Tftrametbyl lead (as Pb)-- Skin............................................................... Tetrametbyl lucdnonltrlla-- Skin........................................... 06 Tetranltromethane...... ............... 1 Telryl (2.4.6-trtnttrophenyl- 0 07 1 8 methylnltramtne)--Skin..... ............................. Thallium (soluble com- pounds)--Skin as T1............ ....................... Thtrain............................................................ 1.8 0.1 8 Tin (Inorganic empda. except oxides.............................. Tin (organic cmpds)....................................... 2 01 C Toluen*-2,4dUsocyanate____ 0 02 0.14 o-Toluldlne--Skin.............. 6 22 Toxaphene. see Chlorinated enmphene........................................................... --........ .. Tributyl phosphate-..................................... 6 1.1.1-Trlchloroethane, e Methyl chloroform............................... ........................ 1.1.2-Trlchloroethane--Skin....... Tltanlumdloxlde............................ Ttlchloromethane, see Chloro 10 43 13 form_____ __--....-------- ---.....--........--...... Trichlorooaphlhalent-- Skin......................... 3 1A3-Trtchloropropane................ SO 300 1.1.2-Ttlehloro 1.2,2-trlfluoroethane........................................ 1,000 7.600 Triethylamln*..... ....................... 23 Trlfluoromonnhromomethane... 1.000 2,4.6-TtlnUrophenol, see Picric 100 6,100 acid............................ 2t4,6-Trinltrophenylrno;hyl* riltramlne, see TetryL................................................... Trinitrotoluene--Skin........ ............................ L8 Triorthn'resyl phosphate...______ _______ _ Triphonyl phosphate...................................... 0.1 3 Turpentine.................................. 100 Uranium (solublecompounds)____________ 660 0.06 Uranium (Insolublecompounds).--...... 0,26 C Vanadium: V,Oi dust............................................. 0,8 ViOifume.................................................... 0.1 Vinyl bentene, aee Styreoa............................ Vlnylcyanlde. see Acrylonitrile........................................ See footnotes at end of table. 508 Chapter XVII--Occupational Safety and Health Admin. 1910.1000 Table Z-l--Continued TAJBLt Z--1--Continued Substance p.p.m.- mg./M* * Substance p.p.m.* mg./M* * Vinyl toluene .............. XyUdlne--Stin_................ . ... B 480 0.1 438 28 Yttrium..... .................. ................................ Zinf oxide fame.*.................... ............ 4 Zirconium compounds (as Zr).._................ 1 1 6 8 1570 Addition. Parts ol vapor or gas per million parts of contami nated air by volnroe at 75' C. and 780 mm. Hg pressure. * Approximate milligrams of particulate per cubic meter ol air. (No footnote "e" Is wed to avoid contusion with celling value notations.) An atmospheric concentration ol not more then 0.02 p.p.m., or personal protection may be necessary to avoid headache As eempled by method thet does not collect vapor. /For control ol general room air, biologic monitoring Is essential for personnel control. Tabli Z-2 Material 8-hour time weighted average Acceptable < celling concentration Acceptable maximum peak abote the acceptable celling concentn. tlon lor an 8-hour shut. --------------------------------------------------- Concentration Maximum duration Bentene (2*7.4-1988).__ 10 p.pjn______ .. 28 p.pjn 80 p.pjn 10 mindtea. Beryllium and berylliumcompounds 2*g.Al>____ .__ .. 6JM'------------ 2SJM........... 30 minutes. (Z37.29-1970). Cadmium tume fZ3T.6-1270)...___________0,1 mg./M'_____ .. 3 mg.fM*............. Cadmium dost (237.6-1970).......................... 0.2mg.Al' .. 0.8mg.Al* ___ Carbon dlsulflde (2I7J-196S)...................... 20 p.pjn .. 30 p.p.m_______ 100 p.pjn______ Do. Carbon tetrachloride (237.17-1807)10 p.pjn_____ .. 28 p.pjn. 200 p.pjn--------- 6 minutes In any 4 hours. Ethylene dibromide (257,31-1970)______ _ 20 p.pjn_____ .. 80 p.pjn_______ 60 p.pjn_______ 6 minutes. Ethylene dleblortde (237.21-1969).. 80 p.pjn......... -- 100 p.pjn______ 200 p.pjn........... 6 minutes In any 3 boon. Formaldehyde (ZJ7.18-1987).........................8 p.pjn_______ .. 8 p.pjn 10 p.pjn SOmlnntea* Hydrogen fluoride (237.28-1989)...........................do________ Fluoride as dost (Z37.2S-1909).................. 2.8 mg.At* Lead and Ita Inorganlccompounds (Z37.ll- 0.2 mg.Al*____ 1989). Methyl chloride (237.18-1969)....................... 100 p.pjn........ 200 p.pjn......... ......... 5 minutes In any 3 hoars, Methylene chloride (Z37J-1989)................... 800 p.pjn........ 1,000 p.pjn___ ____ 8 minutes In any 2 boon. Organo (elhyl) mercury (237-30-1989)0.01 mg.Al *... 0.W tngJM * Styrene (Z37.1S-1989).................................... 100 p.p.m........ 200 p.pjn.......... 8 minutes In any 3 hours. Trichloroethylene (Z37.19-1987)............................do_............ 8 minutes In Tetrachloroetbylene (Z37-23-1967)_____________ do..... ......... _..dn . . any 2 boors. 8 minutes In any 3 hours. Tolnene (Z37.12-I987)............................... . 200 p.pjn........ 300 p.pjn........ 10 minutes. Hydrogen vulflde (237J-1988).................................................. 20 p.pjn______ 10 minutes once only 11 no other measur able exposun occurs. Mercury (737.8-1871).................................. 1 mgJlOM, Chrnmlo add and chromales (Z3T.7-1971) ___ do*.... 509 5 1910.1001 Title 29--Labor Table Z-3--Mineral Derrs Subsumes Mppcf Mg/M` Silks: Crystalline: Quartz (respirable). 250' lOmjrMi Quartz (total dust) TrSlOrfJ C-SlOt-2 30mg.ll' Cristohallte: Use H the value calculated from the count or mass formulae for quartc. Trldymiie: Use H the value calculated from the for mulae lor quart!. Amorphous. Including natural dlatoroaceous earth................. %S|OlT? 80me/Mi w-SlOr Silicates (less than 1% crys talline silica): Mica.............................................. Soapstone..................................... 20 Talc (non-i.'be'tos-form) .. 20* Talc (fibrous). Use asbestos limit ............................... Tremollte (see talc, fibrous) Portland cement........... 80 Graphite (natural)......... ..... 18 Coal dust (respirable fraction less than 8SJ 310*).................................... 2.tea'll' or For more than 87c SlOj................. . lOrac'M* Inert or Nuisance Dust: Respirable fraction.............. Total dust_____ __________ %SlOz+2 18 8mg'.M' 80 18mg/.M' Non: Conversion factors-- mppcfX38.3-mllllon particles per cubic meter -particles per c.c. Millions ol particles per cubic loot of air. based on tmplnger samples count'd by light-field technics. 1 The percentage ol crystalline silica In the formula is the amounl determined Irom air-borne samples, eicept In those Instances In which other methods have ben shown to be applicable. i As determined by the membrane filter method at (OOXPhase contrast magnification. - Both concentration and percent quartz for the appli cation of this limit are to be determined from the fraction passing a size-selector with the following characteristics: Containing < 1% quarit; If > 1% quartz, use quartz limit. Aerodynamic diameter (unit density sphere) 2 26 3.8 A0 10 Percent paasine selector 90 76 80 a 0 The measurements under this now refer to the use o an AEC Instrument.[' the respirable fraction of coal dust Is determined with a M R E the figure corresponding to that ot 2.< Mg/M< in the table for coal dust Is 4-8 MgfM*. [39 FR 23502, June 27, 1974. Redesignated and amended at 40 FR 23073, May 23. 1975] R&S 100350 510