Document daVK9QbbbObLZoQRbZm737Oz6

CELANESE CHEMICAL COMPANY Chemcel Plant Bishop, Texas To: R. L. Bunkley From: Ann Retherford 6>l' AER-l-76 January 7, 1976 Hazards Review Attached are the updated lists of materials which OSHA has found or suspected to be hazardous. Table I contains materials already under present OSHA stand ards. The remaining attachments are taken from the Federal Register, Vol. 39, No. 125, pp 23540-23543 and include substances which OSHA considers potentially hazardous but not yet under OSHA standards. These lists are provided as re quested in RLB-33-75. AER/dh Attachments cc: Messrs. *G. D. Boyd - Chemical W. H. Meyer J. M. Sawyer P. J. Volpe C. A. Amond - Plastics A. J. Draper E. Munoz **W. T. McNair - CCCTC Central Files With Attachments '-Without Attachments Ann Reth.erford : Uniterms: OSHA Pigments 003980 File: 259.0 Attachment to AER-1-76 January 7, 1976 Table I Materials Currently Under OSHA Standards Asbestos Coal Tar Pitch Volatiles . 4-Nitrobiphenyl A lpha- Napthylamine 4, 4 '-Methylenebis (2-Chloroaniline) Methyl Chloromethyl Ether 3, 3 '-Dichlorobenzidine (and its salts) Bis Chloromethyl Ether Beta - Naphthylamine Benzidine 4-Aminodiphenyl Ethylene imine Beta-Propiolactone 2 -A cetylaminofluor ene 4 - Dime thylaminoaz obe nz e ne N-Nitrosodimethylamine Vinyl Chloride 003981 003982 Page 1 (a) Table G-l: {1) Materials with names preceded by "C"--ceiling values. An employee's exposure to any material in table G-l, the name of which is preceded by a "C" (e.g., (J Boron tri fluoride), shall at no time exceed the ceiling value given for that material in the table. (2) Other materials--8-hour time weighted averages. An employee's exposure to any material in.table G-l, the name of which is not preceded by "C", in any 8-hour work shift of a 40-hour work week, shall not ex ceed the 8-hour time weighted average given for that material in the table. Table G-l Substance p.p.m. mg./M* Acetaldehyde........................... 200 Acetic acid................................. 10 Acetic anhydride.......... ............ 5 Acetone...................................... 1,000 Acetonitrile.............. ......... ........ 40 Aoetylene dichlorlde, see l, 2- Dichloroethylene....... ............. Acetylene tetrabromlde__ ____ Acrolein................ .................... 1 0.1 Acrylamide--Skin....................... Acrylonitrile--Skin.................... 20 Aldrin--Skin.......... .................... Ally) alcohol--Skin-.......... ........ 2 Allyl chloride.... ........................ 1 *C Allyl clycldyl ether (AGE). 10 Allyl propyl disulfide................ 2 2-Aminoethanol, see Ethanol- amine........................................ 2-Aminopyridine...................... 0.5 Ammonia. SO Ammonium suUamate (Ani mate)..................................... n-Amyl acetate..... ....... 100 sec-Amyl acetate________ ____ 125 Aniline--Skin........................... 5 Anlsldlne (o. p-lsomers)--Skin- Antimony and compounds (ns St>)........................... .......... ANTTJ (alpha naphthyl thlourpa)............. ...... Arsenic and compounds (as As).. Afsins > 0.05 A tin phos-methyl--Skin.____ __ Barium (soluble compounds).... p-Benzociuinone, see'Quinone-- Benzoyl peroxide....................... Benzyl chloride Biphenyl, see Diphenyl_____;.. Bisphenol A, see Diglycldyl ether......................................... Boron oxide......................... ...... C Boron trifluoride.-.._______ 1 Bromine..................................... 0.1 Bromnform--Skin..................... 0.5 Butadiene (I. 3-hutadIene) 1,000 Butaneihial, see Butyl mer captan ...................................... 2-Biitanone.............................. 200 2-Dutnxy rthanol (Butyl Cel- losolve)--Skin......................... 50 Butvl acetate (n-butyl acetate). ISO sec-Butyl acetate 200 tert-Butyl acetate 200 Butyl alcohol............................ 100 sec-Butyl alcohol............... 150 tert-Butyl alcohol ICO C Butylamine--Skin................ 5 C tert-Butyl chromate (as CrOjl--Skin............................. n-Butyl glycldyl ether (BQE).. 0 Butyl mercaptan..................... 10 360 25 20 2.400 70 14 0.25 0.3 45 0.25 5 3 45 12 2 35 15 525 G50 10 0.5 0.5 0.3 0.5 0.2 0.2 ...0...5.. 5 15 3 0.7 5 2,200 SCO 240 710 950 950 300 450 300 15 0. 270 35 D-tert-Butvltnluene ___ 10 60 Calcium arsenate_______ _____ Calcium oxide..............._......... Camphor.................. ............ 2 1 5 Carbary! (Sevin) ................. Carbon black.......................... 5 3.5 Carbon dioxide................ ......... Carbon monoxide Chlordanc--Skin....................... Chlorinated camphene--Skin__ Chlorinated diphenyl oxide....... Chlorine Chlorine dioxide........................ C Chlorine trifluoride C Chloroacetaldehyde 5,000 50 1 0.1 0.1 1 9,000 55 0.5 0.5 as 3 0.3 0.4 3 a-Chloroacetophenone (phenacylchloride)........... ...... 0.05 0.3 Chlorobenzene (monochloro benzene).......... ..................... 75 350 o-Chlorobenzylldene malononjtrile (OCBM) Chlorobromomeihane 0.05 200 0.4 1.050 2-Chloro-l,3-butadiene, see Chloroprene.......................... Chlorodiphenyl (42 percent Chlorine)--Skin............... ........... .-- ----Chlorodiphenyl (54 percent Chlorine)--Skin......................................... 0.5 1-Cblom,2,3-p.poxypropone, see Kpichlorhydrin......................................... ................ 2-ChIoroethanol, see gthylene chlorohydrin..________ Chloroethylene, see Vinyl chloride......................... C Chloroform (trichlorometh&ne)_____ _____ 1-C hloro-l-nitropropane... Chloropicrin..................... 50 20 0.1 2& -. 180' :0.7 Chloroprene (2-chloro-l,3- butadlene)--Skin.......... 25 90' Chromium, sol. chromic, chromous salts as Cr........ . 0)5 Metal and insol. salts............. 1 Coal tar pitch volatiles (ben zene soluble fraction) anthra cene, BaP. phenanthrone, acridine, chrysene, pyrene.... 0.2 Cobalt, metal fume and dust... 0.1 Copper fume. 0.1 1 Cotton dust (raw)................................... 1 Crag herbicide------------ ------------------- 15 Cresol (all Isomers)--Skin------- 5 22 Crotonaldehyde.................. Cumene--Skin......................... 2 50 6 245 Cyanide (as CN)--Skin........................ 5 Cyclohexane..................... 300 1,050 Cyclohexanol................. -........... 60 200 Cyclohexanone..--....... ..........-- 50 Cyclohexene.............. ............ - 300 . 200 1,015 Cyclcpentadlene................... -- 75 200 2,4-D..................................... ................ 10 DDT--Skin............................................ 1 DDVP, see Dichlorvos..................------- -------------- - Decahorane--Skin...--------------- 0.05 0.3 Demeton--Skin.....................-.................... a1 Diacetone alcohol (4-hydroxy- 4-methy!-2-pentanone)---------- 50 240 1.2- diaminoethane, see Ethylenedlamine........................ --- Diazomethane............................ - Diborane..................................... 0>1 Dlbutylphthalate................................. --- C o-Dichlorobenzene.................. 50 0.4 0.1 5 300 p-DIchlorobenzene.................. -- 75 450 Dichlorodifluoromethane--------- 1,000 4,950 1.3- D lchloro-6,5-dlmethyl hydantoln............................................... 1.1- Dichloroethane................. 1.2- Dlchloroethylene............. 200 C Dichloroethyl ether--Skin... 15 0.2 400 7S0 90 Dichloromethans. see Methylenechlorlde.............................. -- Dichlorornonofluoromethane-- 1,000 4,2CO C 1,1-Dlchloro-l-nitroethane----- 10 00 1.2- Dlchloropropane, see ` Propylenedichlorlde................................... ............ I 003983 Table G-l--Continued Substance p.p.m.* mg-Al' ` Diehlorotetrafluoroethane......... 1,CC0 Dichlorvos (DDVP)--Skin------ Dleidrln--Skin.......................... Plethylamine............................. 25 Plethylamlno ethanol--Skin-- 10 Dlethylether, see Ethyl ether.. Dlfluorodibromomethane....... 100 C Diglycidyl ether (DGE)....... 0.5 Dihydroxybenzene, see Hydroqulnone......................... Dilsobutyl ketone......... ."......... 50 Diisopropylamine--Skin.. 5 Dimcthoxymethane, see Methylal.................................. . Dimethyl acetamide--Skin..... 10 Dtmethylamlne______________ 10 Dlmethylaminobenzene, see Xylidene................................... Dimethyl3niIlne(N-dimethyl- anlllne)--Skin......................... 5 Dimethylbenzene, see Xylene... Dimethyl l,2-dibromo-2,2-dl- chloroethyl phosphate, (Dibrom)................................. ........... Dlmethylformamide--Skin____ 10 2,6-Dimethylheptanone, see Diisobutyl ketone....... ............ 1.1- Dimethylhydrazine--Skin-- 0.5 Dlmethylphthalate.......... .......... ............ Dimethylsulfate--Skin. -........... 1 Dinitrobenzene (all isomers)-- Skin.......................................... Dinitro-o-cresol--Skin.. ............. Diuitrotoluene--Skin..... ............ ............ ............. ............ Dioxane (Diethylene dioxide)-- Skin............. .......................... 100 Diphenyl.................... -.............. 0.2 Diphenylmethane diisocyanate (see Methylene bisphenyl isocyanate (MDI)..................... Dipropylene glycol methyl ether--Skin.............................. 100 Dl-sec. octyl phthalate (Di-2ethylhexylphthalate)............... Entirin--Skin............ ....... ......... ............ ............ Epichlorhydrin--Skin............... 5 EPN-Skin.................................. ............ 1.2- Epoxypropane, see Propyleneoxide......................... 2.3- Epoxy-l-propanol, see Glycidol.................................... 7,000 1 0.25 75 60 860 2.8 290 20 35 IS 25 3 30 1 5 5 1 0.2 1.6 360 1 600 5 0.1 19 0.5 Etchaapnteatnhl.o..l.,.s.e.e..E..t.h..y.l.m..e..r.-..... . Ethanolamine............................. 3 6 2-Ethoxyethanol--Skin 200 740 2-Ethoxyethylacetate (Cello- EEttshhoyylvlleaaacccereyttlaaattteee)--.--..S.S...kk..ii.nn......................... 100 400 25 540 1,400 100 Ethyl alcohol (ethanol)........... 1,070 1,900 Ethylamlne............................... 10 18 EEEtttmhhhcyyytlllhsbbyeerl-ocn3-zma-ehmincdyepel.t..ak..en....to.o..n.n..ce..).....(.5-...-..................... 25 ICO 200 130 435 890 Ethyl butyl ketone (3- V EEttHhheyypll cetathhnleoorrn.i.ed..)e................................................................. 50 1,000 403 230 21,,020000 Ethyl formate............................. ICO 300 C Ethyl mercaptan............ 10 25 Ethyl silicate... ................. 100 850 Ethylene chlorohydrin--Skin.. 5 10 Ethylcncdiamine............ .... 10 25 Ethylene dlbromide, see 1,2- Dlbromoethane........................ Efhylene dichlorlde, see 1,2- Dichloroethane---------------- ------------------------------- C Ethylene glycol dinltrate and/or Nitroglycerin--Skin... <* 0.2 1 See footnotes at end of table. Page 2 Ethylene glycol mcnomethyl ether acetate, see Methyl cellosolve acetate......... ........ Ethylene lmlne--Skin....... ....... Ethylene oxide....................... . 0.5 50 1 90 Ethylldine chloride, see 1,1- Dichloroethane............... ....... N-Ethylmorpholine--Skin____ 20 94 Ferbam..____ _______________ ............................. 15 Ferrovanadlum dust__________ ............... 1 Fluoride (as F)........................... ................. 2. 5 Fluorine................................. . 0.1 0.2 Fluorotrichloromethane............ 1,000 Formic acid..................... ........ 5 6,600 9 Furfural--Skin........................... Furfuryl alcohol......................... 5 50 20 200 Glycidol (2,3-Epoxy-l* propanol).............................. . 50 150 Glycol monoethyl ether, see 2-Ethoxyethanol............. ........ Guthion , see Azlnphos- methyl....... .............. .............. Hafnium__ ____ _____________ 0.5 Heptachlor--Skin...................... Heptane (n-heptane)................ Ifexachloroothane--Skin Hexachloronaphthalene--Skin.. Hexane (n-hexane).......... ........... 2-Hexanone........ ........................ 600 1 500 100 0.5 2,000 10 0.2 1,800 410 Hexone f Methyl isobutyl ketone)...____________ _____ 100 410 sec-IIexyl acetate........................ 50 300 H ydra2ine--Skin.... Hydrogen bromide. 1 1.3 3 10 C Hydrogen chloride Hydrogen cyanide--Skin.......... 5 10 7 11 Hydrogen peroxide (90%)_____ 1 1.4 Hydrogen splenide____________ 0.05 fe2 Hydroquinone............................ RTv C Iodine___ ............ ............ Iron oxide fume____ __________ 0.1 ' i ft Isoamyl acetate________ ____ -- 100 525-- Isoamyl alcohol........................... 100 360 Isobutyl acetate.......................... 150 700 Isobutyl alcohol......................... 100 300 Isophorone________ __________ Isopropyl acetate........................ Isopropyl alcohol........................ Isopropylamine....... .................... Isopropylether............................. 25 250 400 5 600 140 950 930 12 2,100 Isopropyl glycidyl ether (IGE). Ketene_______________ 50 0.5 240 0.9 Lead arsenate_________________ Lindane--Skin._______________ ................. Lithium hydride_________..... ................. 0.15 0.5 0.025 L.P.G. (liquified petroleum gas)............................... ........... 1,000 1,800 Magnesium oxide fume.......... ------------------------- 15 Malathion--Skin_________ _____ ............................. 15 Maleic anhydride.......... 0.25 1 C Manganese................__ ............................. 5 Mesityl oxide................. ............. 25 100 Methanethlol, see Methyl mercaptan.......................... Methoxychlor...... ..................... . , 2-Methoxyethanol, see Methyl 15 cellosolve.......... ................. ...... Methyl acetate_______________ 200 610 Methyl acetylene (propyne)__ _ 1,000 1,650 Methyl acetylene-propadiene mixture (MAPP)..................... 1,000 Methyl acrylate--Skin............... 10 1.800 35 Methylal (dimethoxyir.sthane).. 1,000 3, ICO Methyl alcohol (methanol) 200 200 Methylamlne 10 12 Methyl amyl alcohol, see Methyl isobutyl carblnol_____ Methyl (n-amyl) ketone (2Heptanone) C Methyl bromide--Skin Methyl butyl ketone, see 2- Hexanone____ _____ _________ Methyl cellosolve--Skin Methyl cellosolve acetate--Skin Methyl chloroform..... ................ Methylcyclohexane Methylcyclohex3nol............... ..... 100 20 25 25 350 SCO ICO 455 SQ so 120 1,900 2,030 170 003984 Table G-l--Continued Substance p.p.m.* ttig./M1 * o-Math ylcyclohexanone--Skin.." Methyl ethyl ketone (MEX), Methyl formate........................... Methyl Iodide--Skin...... ........... Methyl isobutyl carblnol--Skin. Methyl isobutyl ketone, see ' 100'' ico 6 25 Methyl isocyanate--Skin-------- C Methyl mercaptan--------------Methyl methacrylate....'--------Methyl propyl ketone, see 2- 6.02 10 100 C a Methyl styrene.................... C Methylene bisphenyl Isocyanate (MDI)..------------Molybdenum: 100 0.02 Insoluble compounds---------- -- Monomethyl aniline--Skin.----- C Monomethyl hydrazine-- Skin ........................... Tirr.vethrtHnfl--RVIn ______.... Naphtha (coaltar)...................... Naphthalene........................ ...... Nickel carbonyl................... ...... Nickel, metal and soluble 2 0.2 20 100 10 0.001 Nitric acid............................ ---- Nitric oxide............................ --b-Nitroanillne--Skin.................. Nitrobenzene--Skin...... .......... -- 2 25 1 1 TCU.MAthftnA ........ .................... Nitrogen dioxide. ...................... Nitrogen trifluoride.................... Nitroglycerin--Skin................. Nlfmmpt.hftnft._________ ___ ... 1-Nltropropane........................... 2-Nltropropane........................... Nltrotoluene^-Skln....... ............. Nitrotrichloromethane, see 100 5 10 0.2 100 25 25 5 Octachloronaphthalene--Skin.... 500 Oxygen difluoride----- ...--------- 6.05 0.1 Pentaborane---------------- ....... 0.005 Pentachloronaphthalene--Skin____ ____ Pentachlorophenol--Skin.................... Pentane.-............... . 1,000 2-Pontanone............ .................- 209 Perchloromethyl mercaptan___ 0.1 Perchloryl fluoride................ 3 Petroleum distillates (naphtha). SCO Phenol--Skin.............................. 5 p-Phsnylene diamine--Skin._____ _____ _ Phenyl ether (vapor)_________ 1 Phenyl ether-biphenyl mixture (vapor)__________ _ 1 1 Phenylethylene, see Styrene..... .............. . Phenyl glyridyl ether (PGE) 10 Phenylhydraxine--Skin______ 5 Phosdrin (Mevtnphos )-- Skin......................................................... Phosgene (carbonyl chloride)... 0.1 Phosphine......... 0.3 Phosphoric acid............... ........................ Phosphorus pentachloride..______ _____ _ Phosphorus pentasulflde_______________ Phosphorus trichloride________ 0.5 Phthallc anhydride______ ____ 2 Picric acid--Skin____ _____ ______ _____ _ Pival (H-PIvalyl-1,3- indandlone)_____________ w 250 23 100 20 410 4S0 0.2 5 15 9 0.35 70 400 50 0.007 1 0.5 5 30 6 5 1 310 9 29 2 250 90 90 30 O.l 2,350 5 0.002 1 0.1 0.2 0.6 0.1 1 0.01 0.5 0.5 2,950 700 0.8 13.5 2,000 19 0.1 7 7 00 22 0.1 0.4 0.4 1 0.1 1 1 3 12 0.1 0.1 Page 3 Platinum (Soluble Salts) as Pt................................................ Propargyi alcohol--Skin-------- Propane n-Propyl acetate....................... Propyl alcohol_______ ______ n-Propyl nitrate..................-- Propylene dichlorlde............... Propylene imlne--Skin--------Propylene oxide...................... .......... 0.002 1 ................... 1,000 l.SOO 2CO 840 200 too 25 110 75 350 25 100 240 Propyne, see Methylacetylene. Pyrethrum____ ____ ______ -- ................. 5 Pyridine....... ........................ 5 15 Qulnone_________ RDX--Skin--........................ 0.1 ......... 0.4 1.6 Rhodium, Metal fume and dusts, as Rh....................... -- 0.1 Soluble salts.............................................. 0.001 Ronnel.............. -- Rotenone (cominerclal)......................-....... Seienlum compounds (asSe)....................... Selenium hexafluoride................ 0.05 10 5 0.2 0.4 Silver, metal and soluble com pounds............................................... ....... 0.01 Sodium fluoroacetate (1080)-- Skin............................................................ Sodium hydroxide______________-........... - Btlbine......................... 0.1 Stoddard solvent...... ...............- 600 Strychnine__________ _______ ___________ Sulfur dioxide--.............. .......... 5 Sulfur hexafluoride...... ............ . 1,000 Sulfuric acid............... .............................-- Sulfur monochloride................... 1 0.05 2 0.5 2,950 0.15 13 6,000 1 6 Sulfur pentafluoride__________ 0.025 0.25 Sulfuryl fluoride........................ 5 Systox, see Demeton . 2.4.5T............................. Tantalum____________ ;'5' TEDP-Skin................ 0.2 Tellurium...-_________________________________y*-0. 1 Tellurium hexafluoride________ 0.02 . 0.2 TEPP-Skin.................................................. 0.05 C Tcrphenyls-- .................... 1.1.1.2- Tetrachloro-2,2-difluoro- ethane................................... . 1 500 9 4.170 1.1.2.2- Tetrachloro-l,2-difluorocthane____ ____ _____ _____ _ 1.1.2.2- Tetiachloroethane--Skin Tetracnloroethylene, see Per- 600 6 4.170 35 chloroethylene_______ ____ ___ Tetrachloromethane, see Carbon tetrachloride..... ........................ Tetrachloronaphthalene--Skin__ Tetraethyl lead (as Pb)--Skin... Tetrahydrofuran........................ 200 2 0.075 590 Tetramethyl lead (as Pb)-- Skin............................................................. 0.07 Tetramethyl succlnonltrile-- Skin.......................................... 0.6 3 Tetranltromethane..................... 1 8 Tetryl (2,4.6-trinltrophenylmethylnltramine)--Skin--..................... 1.5 Thallium (soluble com pounds)--Skin as T1................................. Thlram......................................... ............ -- 0.1 5 Tin (inorganic cmpd3, except oxides......................................................... Tin (organic empds)..................................... C Toluene-2,4-dlisocyanate____ 0.02 2 0.1 0.14 o-Totuldine--Skin...................... Toxaphene, see Chlorinated 5 22 camphene___________ ______ __________ Tributyl phosphate--.................................. 1,1,1-Trlchloroethane see Methyl chloroform. 1.1,2-Trichloroethane--Skin___ Titaniumdioxide_______________ 10 45 15 Trlchloromethane, see Chloro- form ............................................ Trlchloronaphthalene--Skin____ 1,2,3-Trichloropropane.............. . 50 6 300 1,1,2-Trichloro 1,2,2-trifluoroethane...................................... Triethylamine.......... ...............-- Trifluoromonobromomethane__ 1,000 25 1,000 7,000 100 0,100 2,4,6-Trinitrophenol, see Picric acid_________________________ Table G-l--Continued Substance p.p.m. mg./M** 2,4,6-TrInitrophenylmethyl- nitramine, see Tetryl........ ......................... ......... .-- Trinitrotoluene--Skin............ 1.5 Triorthocresyl phosphate.............................. 0.1 Trip'nenyl phosphate....... ............................. 3 Turpentine.................................. 100 Uranium (soluble compounds)....................- 660 0.05 Uranium (insoluble compounds)................... 0.25 C Vanadium: VjOsdust..................................................... 0.5 VjOjfumo............... 1............ --.................. 0.1 Vinyl benzone, see Styrene......................................... ... *C Vinyl chloride...................... 600 ' 1,300 Vlnylcyanide, see Acrylonitrile............. ........................ Vinyl toluene_______________ 100 480 Warfarin......................... _________-.............. 0.1 Xylene (xylol)............... 100 435 Xylidlne--Skin........................... 5 25 Yttrium____................................................... 1- Zinc chloride fume..... ............................ ...... 1 Zinc oxide fume__ ______________________ 6 Zirconium compounds (as Zr)------------- ----- --------- 5 1970 Addition. Parts of vapor or gas per million parts of contami nated air by volume at 25 C. and 760 mm. Hg pressure. 1 Approximate milligrams of particulate per cubic meter of air. (No footnote "c" is used to avoid confusion 'with celling value notations.) '4 An atmospheric concentration of not more than 0.02 p.p.m., or personal protection may be necessary to avoid headache. * As sampled by method that does not collect vapor. / For control of general room air, biologic monitoring is essential for personnel control. (b) Table G-2: Page 4 (1) 8-hour time weighted averages. An employee's exposure to any material listed in table G-2, in any 8-hour work shift of a 40-hour work week, shall not exceed the 8hour time weighted average limit given for that material in the table. (2) Acceptable ceiling concentrations. An employee's exposure to a materiafTisted in table G-2 shall not exceed at any time dur ing an 8-hour shift the acceptable 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 ceiling 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.p.m.) only for a maximum period of 10 minutes. Such exposure must be compen sated by exposures to concentrations les3~ than 10 p.p.m. so that the cumg^ative exposure for the entire 8-hour ,,wofe. shift does not exceed a weighted average of 10 p.p.m. Material Table 0-2 8-hour time weighted average Acceptable celling concentration Acceptable maximum peak above the acceptable ceiling concentra tion for an 8-hour shift. Concentration Maximum duration Benzene (Z37.4-1969)..................................... 10 p.p.m___________25p.p.m______60 p.p.m--.... 10 minutes. Beryllium and beryllium compounds 2 pg./M1Spg./M*25 ^g./M*_____________________ __ 30 minutes. (Z37.29-1970). Cadmium fume (Z37.5-1970)........... 0.1 mg./M>-------- 3 mg./M*---------------- .............. Cadmium dust (Z37.5-1970)0.2 mg./M*--------------------------------O.Omg./M*...................................... Carbon disulfide (Z37.3-1968)...................... 20 p.p.m....................30p.p.m---------100 p.pm-------- Do. Carbon tetrachloride (Z37.17-1967)10 p.pm----------------------- 25 p.pm------------ 200p.p.m------- 5 minutes in any 4 hours. Ethylene dibromide (Z37.31-1970)........... . 20 p.pm.............CO p.pm----------- CO p.pm----------- 5 minutes. Ethylene dichloride (Z37.21-1889)50 p.pm............................... ICO p.p.m----------- 200 p.p.m--------- 6 minutes la any 3 hours. Formaldehyde (Z37.18-1967)--------------------- 3 p.p.m..---------5 p.pm-------------- 10 p.pm------------ 30 minutes. Hydrogen fluoride (Z37.2S-1989)...........................do............................................................................ Fluoride as-dust (Z37.28-1969)...................... 2.5 mg./M*.---------------------------------------------------------- Lead and Its Inorganic compounds (Z37.ll- 0.2 mg./M1------------- -------------------------- - 1C49). Methyl chloride (Z37.18-1969)..................... 100 p.pm........ 200 p.p.m------------ 300 p.pm........... 5 minutes in any 3 hours. Methylene Chloride (Z37.3-1969).................. 500 p.pm........l,CC0p.pm.............. 2,000 p.p.m........ 5 minutes in any 2 hours. Organa (alkyl) mercury (Z37.30-1959) Styrane (Z37.15-1969).......................... 0.01 mg./M 0.C4 mg./M *________________ 100 p.p.m........2CO p.pm_________ 600 p.pm. 5 minutes In any 3 hours. Trichloroethylene (Z37.19-1967)......... .....do..................... do....... .............3CO p.pm. 6 minutes in any 2 hours. Tetrachloroethylene (Z37.22-1067)___ ___ do......................do....... .....................do.... 6 minutes in any 3 hours. Toluene (Z37.12-1967)......................... Hydrogen sulftde (Z37.2-19W)............ 200 p.pm____ 300 p.pm________SCO p.pm 10 minutes. 20 p.pm________________________ 50 1p0.pm.minu. tes once only if no other measur able exposure occurs. Mercury (7,37.8-1971)...............................................................lmg./10M, Chromic acid and chromates (Z37.7-1971)_________ __________ do __ 003985 Page 5 (c) Table G-3: An employee's exposure to any material listed in table G-3, in any 8-hour work shift of a 40-hour wo'rk week, shall not exceed the 8-hour time weighted average limit given for that material in the table. Table 0-3--Mineral Dusts Substance Mppcf Mg/M3 Silica: Crystalline: Quartz (respirable)____ 250 * 10mg/M3 Quartz (total dust)..... %SiOj+5 %SiO*+2 30mg/M Cristobalite: Use H the value calculated from the count or mass formulae for quartz. Tridymite: Use M the value calculated from the for mulae for quartz. Amorphous, including natural diatomaceous earth................ %SjOH-2. 20 80mg/M3 %S10i Ideates (less than -1% crys talline silica): Mica...........______________ Soapstone________ ________ 20 Talc (non-asbestos-form)... 20 Talc (fibrous). Use asbestos limit.................................. Tremollte (see talc, fibrous) Portland cement........... . 60 Graphite (natural)............. . 15 Coal dust (respirable fraction less than 5% SiOj)......... i........................ For more than 8% SlOi.............................. 20 , 2.4mg/M3 or 10mg/M3 Inert or Nuisance Dust: Respirable fraction Total dust_______________ %SiOi+2 16 5mg/M3 60 15mg/M3 Note: Conversion factors-- mppcfX36.3million particles per cubic meter = particles per c.c. ^.Millions of particles per cubic foot of air, based on lmpinger samples counted by light-field technics. (. The percentage of crystalline silica in the formula is. the amount determined from air-borne samples, ex cept in those instances in which other methods have been shown to be applicable. As determined by the membrane filter method at 430X Phase contrast magnification. m Both concentration and percent quartz for the appli cation of this limit are to be determined from the fraction passing n size-selector with the following characteristics: "Containing < 1% quartz; it > 1% quartz, use quartz limit. (d) Computation formulae: (1) (i) The cumulative exposure for an 8-hour work shift shall be computed as follows: -f- ... c.r. E ------------------------------------------ 8 where: E is the equivalent exposure for the working shift. C is the concentration during any period of time T where the concentration remains constant. T is the duration in hours of the exposure at the concentration C. The value ofE shall not exceed the 8-hour time weighted average limit in table G-l, G-2, or G-3 for the material involved. (i) To illustrate the formula prescribed in subdivision (i) of this subparagraph, note that isoamyl acetate has an 8-hour time, weighted average limit of 100 p.p.m. (table G-l). Assume that an employee ispubject to the following exposure: -- ^ Two hours exposure at 150 p.p.m. . Two hours exposure at 75 p.p.m. Four hours exposure at 50 p.p.m. Substituting this information in the for mula, we have 2 X 150 + 2 X 75 + 4 x 50 8 = 81.25 p.p.m. Since 81.25 p.p.m. is less than 100 p.p.m., the 8-hour time weighted average limit, the exposure is acceptable. (2) (i) In case ofa mixture ofair contaminants an employer shall compute the equ lvalent exposure as follows: Ci Ci Ci where: Em is the equivalent exposure for the mixture. C is the concentration of a particular contaminant. /, is the exposure limit for that contaminant, from table G-l, G-2, or G-3. 003986 Page 6 The value of Em shall not exceed unity (1). 9 (ii) To illustrate the formula prescribed in subdivision (i) of this subparagraph, con sider the following exposures: Material Actual con centration of 8-hour exposure 8-hour time weiphted avernpe exposure limit Acetone (Table G-l) ... 500 p.p.m. 1,000 p.p.m. 2-Butanone (Table G-l) 45 p.p.m. 200 p.p.m. Toluene (Table G-2)__ 40 p.p.m. 200 p.p.m. Substituting in the formula, we have: 500 Em -- ---- 1,000 Em = 0.500 Em = 0.925 45 40 -f--------f- ------ 200 200 + 0.225 + 0.200 Since ETO i3 less than unity (1), the expoure combination is within acceptable limits. (e) To achieve compliance with paragraph (a) through (d) of this section, administrative or engineering controls must first be determined and implemented 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 contami nants within the limits prescribed in this sec tion. Any equipment and/or technical measures used for this purpose must be approved for each particular use by a compe tent industrial hygienist or other technically qualified person. Whenever respirators are used, their use shall comply with 1910.134. 003987