Document Dd0RgQbKoagXeG8ynNL7w0eNd

PART 1910--OCCUPATIONAL SAFE TY AND HEALTH STANDARDS (Continued) Subpart Z--Toxic and Hazardous Substances Sec. 1910.1000 Air contaminants. 1910.1001 Asbestos. 1910.1002 Coal tar pitch volatiles; interpre tation of term. 1910.1003 13 Carcinogens (4-Nitroblphenyl, etc.). 1910.1004 alpha-Naphthylam ine. 1910.1005 [Reserved] 1910.1006 Methyl chloromethyl ether. 1910.1007 3,'--Dichlorobenzidine (and its salts). 1910.1008 bls-Chloromethyl ether. 1910.1009 beta^N aphthylam ine. 1910.1010 Benzidine. 1910.1011 1910.1012 1910.1013 1910.1014 1910.1015 4-Aminodiphenyl. Ethyleneimine. beta-Propiolactone. 2-Acetylaminofluorene. 4-Dimethylaminoazobenzene. 1910.1016 N-Nitrosodimethylamine. 1910.1017 Vinyl chloride. 1910.1018 Inorganic arsenic. 1910.1020 Access to employee exposure and medical records. 1910.1025 Lead. 1910.1027 Cadmium. 1910.1028 Benzene. 1910.1029 Coke oven emissions. 1910.1030 Bloodbome pathogens. 1910.1043 Cotton dust. 1910.1044 l,2-dihromo-3-chloropropane. 1910.1045 Acrylonitrile. 1910.1047 Ethylene oxide. 1910.1048 Formaldehyde. 1910.1050 Methylenedlaniline. 1910.1051 1,3-Butadiene. 1910.1052 Methylene Chloride. 1910.1096 Ionizing radiation. 1910.1200 Hazard communication. 1910.1201 Retention of DOT markings, plac ards and labels. 1910.1450 Occupational exposure to haz ardous chemicals in laboratories. Subject Index for 29 CFR Part 1910--Occu pational Safety and Health Stand ards Subpart Z--Toxic and Hazardous Substances Authority: Sections 4, 6, and 8 of the Occu pational Safety and Health Act of 1970 (29 U.S.C. 653, 655, 657); Secretary of Labor's Order No. 12-71 (36 FR 8754), 8-76 (41 FR 25059), 9-83 (48 FR 35736), 1-90 (55 FR 9033), 696 (62 FR 111), or 3-2000 (65 FR 50017), as ap plicable; and 29 CFR part 1911. All of subpart Z issued under Sec. 6(b) of the Occupational Safety and Health Act, ex cept those substances that have exposure limits listed in Tables Z-l, Z-2, and Z-3 of 29 CFR 1910.1000. The latter were issued under Sec. 6(a) (29 U.S.C. 655(a)). Section 1910.1000, Tables Z-l, Z-2 and Z-3 also issued under 5 U.S.C. 553, Section 1910.1000 Tables Z-l, Z-2, and Z-3 not issued under 29 CFR part 1911 except for the arsenic (organic compounds), benzene, and cotton dust listings. Section 1910.1001 also issued under section 107 of the Contract Work Hours and Safety Standards Act (40 U.S.C. 333) and 5 U.S.C. 553. Section 1910.1002 not issued under 29 U.S.C. 655 or 29 CFR part 1911; also issued under 5 U.S.C. 553. Sections 1910.1018, 1910.1029 and 1910.1200 are also issued under 29 U.S.C. 653. Section 1910.1030 is also issued under Pub. L. 106-430, 114 Stat. 1901. Source: 39 FR 23502, June 27, 1974, unless otherwise noted. Redesignated at 40 FR 23072, May 28,1975. 1910.1000 Air contaminants. An employee's exposure to any sub stance listed in Tables Z-l, Z-2, or Z-3 of this section shall be limited in ac cordance with the requirements of the following paragraphs of this section. (a) Table Z-l--(1) Substances with lim its preceded by "C"--Ceiling Values. An employee's exposure to any substance In Table Z-l, the exposure limit of which Is preceded by a "C", shall at no time exceed the exposure limit given for that substance. If instantaneous monitoring is not feasible, then the ceiling shall be assessed as a 15-minute time weighted average exposure which shall not be exceeded at any time dur ing the working day. (2) Other substances--8-hour Time Weighted Averages. An employee's expo sure to any substance In Table Z-l, the exposure limit of which is not preceded by a "C", shall not exceed the 8-hour Time Weighted Average given for that substance in any 8-hour work shift of a 40-hour work week. (b) Table Z-2. An employee's exposure to any substance listed in Table Z-2 shall not exceed the exposure limits specified as follows: (1) 8-hour time weighted averages. An employee's exposure to any substance listed in Table Z-2, In any 8-hour work shift of a 40-hour work week, shall not 7 k HWBUI0008661  1910.1000 29 CFR Ch. XVII (7-1-01 Edition) exceed the 8-hour time weighted aver age limit given for that substance in Table Z-2. (2) Acceptable ceiling concentrations. An employee's exposure to a substance 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 substance in the table, ex cept for a time period, and up to a con centration not exceeding the maximum duration and concentration allowed in the column under "acceptable max imum peak above the acceptable ceil ing concentration for an 8-hour shift." (3) Example. During an 8-hour work shift, an employee may be exposed to a concentration of Substance A (with a 10 ppm TWA, 25 ppm ceiling and 50 ppm peak) above 25 ppm (but never above 50 ppm) only for a maximum period of 10 minutes. Such exposure must be com pensated by exposures to concentra tions less than 10 ppm so that the cu mulative exposure for the entire 8-hour work shift does not exceed a weighted average of 10 ppm. (c) Table Z~3. An employee's exposure to any substance listed in Table Z-3, in any 8-hour work shift of a 40-hour work week, shall not exceed the 8-hour time weighted average limit given for that substance in the table. (d) Computation formulae. The com putation formula which shall apply to employee exposure to more than one substance for which 8-hour time weighted averages are listed in subpart Z of 29 CFR part 1910 in order to deter mine whether an employee is exposed over the regulatory limit is as follows: (l)(i) The cumulative exposure for an 8-hour work shift shall be computed as follows: E = (C, Ta+Cb Tb+. . .Cn Tn)+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 of E shall not exceed the 8-hour time weighted average specified in subpart Z of 29 CFR part 1910 for the substance in volved. (ii) To illustrate the formula pre scribed in paragraph (d)(l)(i) of this section, assume that Substance A has an 8-hour time weighted average limit of 100 ppm noted in Table Z-l. Assume that an employee is subject to the fol lowing exposure: Two hours exposure at 150 ppm Two hours exposure at 75 ppm Four hours exposure at 50 ppm Substituting this information in the for mula, we have (2x150+2x75+4x50)^8=81.25 ppm Since 81.25 ppm is less than 100 ppm, the 8hour time weighted average limit, the expo sure is acceptable. (2)(i) In case of a mixture of air con taminants an employer shall compute the equivalent exposure as follows: Em=(C,+L,+C2+L2)+. . .(Cn+Ln) Where: E,,, is the equivalent exposure for the mix ture. C is the concentration of a particular con taminant. L is the exposure limit for that substance specified in subpart Z of 29 CFR part 1910. The value of Em shall not exceed unity (1). (ii) To illustrate the formula pre scribed in paragraph (d)(2)(i) of this section, consider the following expo sures: Substance Actual con centration of 8-hour ex posure (ppm) 8-hour TWA PEL (ppm) B .............................................. C .............................................. D .............................................. 500 1,000 45 200 40 200 Substituting in the formula, we have: Em=500*l ,000+45*200+40+200 Em=0.500+0.225+0.200 Em=0.925 Since Em is less than unity (1), the exposure combination is within acceptable limits. (e) To achieve compliance with para graphs (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 prescribed in this section. Any equip ment and/or technical measures used for this purpose must be approved for 8 HWBUI0008662 Occupational Safety and Health Admin., Labor 1910.1000 each particular use by a competent in dustrial hygienist or other technically qualified person. Whenever respirators are used, their use shall comply with 1910.134. (f) Effective dates. The exposure limits specified have been in effect with the method of compliance specified in paragraph (e) of this section since May 29, 1971. Table Z-l--Limits for Air Contaminants Substance CAS No. (c) ppm (a) ' mg/m3 (b) * Skin designation Acetaldehyde....................................................................... Acetic acid ........................................................................... Acetic anhydride.................................................................. Acetone ............................................................................... Acetonitrile........................................................................... 2-Acetylaminofluorine; see 1910.1014................................. Acetylene dichloride; see 1,2-Dtchk>roethy!ene. Acetylene tetrabromide ....................................................... Acrolein................................................................................ Acrylamide........................................................................... Acrylonitrile; see 1910.1045 ................................................. Aldrin ................................................................................... Allyl alcohol ......................................................................... Allyl chloride ........................................................................ Allyl glycidyl ether {AGE) .................................................... Allyl propyl disulfide............................................................. alpha-Afumina...................................................................... Total dust ..................................................................... Respirable fraction ....................................................... Aluminum, metal (as Al)....................................................... Total dust .............. Respirable fraction ........................................................ 4-Aminodiphenyl; see 1910.1011......................................... 2-Aminoethanol; see Ethanolamine. 2-Aminopyridine................................................................... Ammonia ............................................................................. Ammonium sulfamate.......................................................... Total dust ........ Respirable fraction n-Amyl acetate ....... sec-Amyl acetate................................................................. Aniline and homologs.................. Anisidine (o-, p-isomers) ............. Antimony and compounds (as Sb) ANTU (alpha Naphthylthiourea) .... Arsenic, inorganic compounds (as As); see 1910.1018 ....... Arsenic, organic compounds (as As) ................................... Arsine .................................................................................. Asbestos; see 1910.1001 .................................................... Azinphos-methyi..... Barium, soluble compounds (as Ba).................................... Barium sulfate ........ Total dust ........ Respirable fraction ....................................................... Benomyi.................. Total dust ........ Respirable fraction ....................................................... Benzene; see 1910.1028 .................................................... See Table Z-2 for the limits applicable in the oper ations or sectors excluded in 1910.1028<* Benzidine; see 1910.1010.................................................... p-Benzoquinone; see Quinone. Benzo(a)pyrene; see Coal tar pitch volatiles.. Benzoyl peroxide................................................................. Benzyl chloride .................................................................... Beryllium and beryllium compounds (as Be) ....................... Biphenyl; see Diphenyl. Bismuth telluride, Undoped .................................................. Total dust ..................................................................... Respirable fraction ....................................................... Boron oxide ......................................................................... Total dust ..................................................................... Boron trifluoride ................................................................... Bromine ............................................................................... 75-07-0 64-19-7 108-24-7 67-64-1 75-05-6 53-96-3 79-27-6 107-02-6 79-06-1 107-13-1 309-00-2 107-18-6 107-05-1 106-92-3 2179-59-1 1344-28-1 7429-90-5 92-67-1 504-29-0 7664-41-7 7773-06-0 628-63-7 626-38-0 62-53-3 29191-52-4 7440-36-0 86-68-4 7440-38-2 7440-38-2 7784-42-1 C) 86-50-0 7440-39-3 7727-43-7 17804-35-2 71-43-2 92-67-5 94-36-0 100-44-7 7440-41-7 1304-62-1 1303-86-2 7637-07-2 7726-95-6 200 10 5 1000 40 1 0.1 2 1 (C)10 2 0.5 50 100 125 5 0.05 1 (C)1 0.1 360 25 20 2400 70 14 0.25 0.3 0.25 5 3 (C)45 12 15 5 15 5 2 35 15 5 525 650 19 0.5 0.5 0.3 0.5 0.2 0.2 0.5 15 5 15 5 5 5 p) 15 5 15 (C)3 0.7 X X X X X X 9 HWBUI0008663 1910.1000 29 CFR Ch. XVII <7-1-01 Edition) Table Z-1--Limits for Air Contaminants--Continued Substance Bromoform ........................................................................... Butadiene (1.3-Butadiene); See 29 CFR 1910.1051, 29 CFR 1910 19(1). Butanethiol; see Butyl mercaptan. 2-Butanone (Methyl ethyl ketone) ........................................ 2-Butoxyethanol .................................................................. n-ButyFacetate .................................................................. sec-Butyl acetate ................................................................. tert-Butyf acetate ................................................................ n-Butyl alcohol..................................................................... sec-Butyl alcohol ................................................................. tert-Butyl alcohol.................................................................. Butylarmne ........................................................................... n-Butyl glycidyl ether (BGE) ................................................. Butyl mercaptan .................................................................. p-tert-Butyltoluene ............................................................... Cadmium (as Cd); see 1910.1027 ....................................... Calcium carbonate .............................................................. Total dust .................................................................... Calcium hydroxide ............................................................... Calcium silicate .................................................................. Total dust ..................................................................... Calcium sulfate .................................................................. Carbon dioxide .................................................................... Carbon disulfide .................................................................. Carbon monoxide ................................................................ Carbon tetrachloride ............................................................ Cellulose ............................................................................. Total dust ..................................................................... Respirable fraction ........................................................ Chlorinated diphenyl oxide .................................................. Chlorine ............................................................................... Chlorine dioxide................................... .................. Chlorine trifluoride ............................................................. Chloroacetaldehyde............................................................. a-Chloroacetophenone (Phenacyl chloride) ........................ Chlorobenzene .................................................................. o-Chlorobenzylidene malononitrile ....................................... Chlorobromomethane .......................................................... 2-Chloro-1.3-butadiene; see beta-Chloroprene. l-Chloro-2,3-epoxypropane; see Epichiorohydrin. 2-Chloroethanol; see Ethylene chlorohydrin. Chloroethylene; see Vinyl chloride Chloroform (Trichloromethane) ............................................ bis(Chloromelhyi) ether: see 1910.1008 ............................. Chioromethyl methyl ether see 1910.1006 ......................... 1-Chloro-l-nitropropane ....................................................... Chloropicrin ......................................... .................... beta-Chloroprene................................................................. 2-Ch!oro-6-(trichloromethyl) pyridine .................................... Chromic acid and chromates (as CtOa)............................... Chromium (II) compounds Chromium (III) compounds. (as Or) .......................................................................... CAS No. (c) ppm (a) ' 75-25-2 0.5 106-99-0 1 ppm/5 Dpm STEL 78-93-3 111-76-2 123-86-4 105-46-4 540-88-5 71-36-3 78-92-2 75-65-0 109-73-9 1189-85-1 2426-08-6 109-79-5 98-51-1 7440-43-9 1317-65-3 200 50 150 200 200 100 150 100 (C)5 50 10 10 1305-62-0 1305-78-8 1344-95-2 7778-18-9 76-22-2 63-25 2 1333-86-4 124-38-9 75-15-0 630-08-0 56-23-5 9004-34-6 57_74_9 8001-35-2 55720-99-5 7782-50-6 10049-04-4 7790-91-2 107-20-0 532-27-4 108-90-7 2698-41-1 74-97-5 53469 21-9 11097-69 1 5000 50 (C)1 0.1 (C)0.1 (C)1 0.05 75 0.05 200 67-66-3 542-88-1 107-30-2 600-25-9 76-06-2 126-99-8 1929-82-4 (C)50 20 0.1 25 n 7440-47-3 7440-47-3 mg/m3 (b)1 5 590 240 710 950 950 300 450 300 (C)15 (C)0 1 270 35 60 15 5 15 5 5 15 5 15 5 2 5 35 9000 55 <2) 15 5 05 05 0.5 (C)3 03 (C)0.4 (03 03 350 0.4 1050 1 05 (C)240 100 0.7 90 15 5 (2> 05 05 Skin designation X X X x x x x x X 10 HWBUI0008664 Occupational Safety and Health Admin., Labor 1910.1000 Table Z-l--Limits for Air contaminants--Continued Substance CAS No. (c) ppm (a)1 mg/m3 (b)1 Chromium metal and insol. salts (as CO ............................. Chrysene; see Coal tar pitch volatiles. Clopidol................................................................................ Total dust ..................................................................... Respirable fraction ....................................................... Coal dust (less than 5% SiOa), respirable fraction ............... Coal dust (greater than or equal to 5% Si02>, respirable fraction. Coal tar pitch volatiles (benzene soluble fraction), anthra cene, BaP. phenanthrene, acridine, chrysene, pyrene. Cobalt metal, dust, and fume (as Co).................................. Coke oven emissions; see 1910.1029. Copper................................................................................. Fume (as Cu) ............................................................... Dusts and mists (as Cu) .............................................. Cotton dust; see 1910.1043 ............................................... Crag herbicide (Sesone) ..................................................... Total dust ........ Respirable fraction ....................................................... Cresol, all isomers ... Crotonaldehyde ................................................................... Cumene ............................................................................... Cyanides (as CN)................................................................ Cyclohexane........................................................................ Cyclohexanot Cyclohexanone Cyclohexene . Cyclopentadiene.................................................................. 2,4-D (Dichlorophenoxyacetic acid) ..................................... Decaborane .. Demeton (Systox)................................................................ Diacetone alcohol (4-Hydroxy-4-methyl-2-pentanone).......... 1.2- Diaminoethane; see Ethyienediamine. Diazomethane ..................................................................... Diborane .............................................................................. 1.2- Dibromo-3-chloropropane (DBCP); see 1910.1044 .... 1.2- Dibromoethane; see Ethylene dibromide. Dibutyl phosphate................................................................ Dibutyl phthalate..... o-Dichlorobenzene . p-Dichlorobenzene . 3.'-Dichlorobenzidine; see 1910.1007 .................................. Dichlorodifluoromethane...................................................... 1.3- Dichk>ro5,5*dimethyl hydantoin.................................. Dichlorodiphenyltrichloroethane (DDT) ................................ 1.1- Dichloroethane ........................................................... 1.2- Dichloroethane; see Ethylene dichloride. 1.2- Dichloroethylene......................................................... Dichloroethyl ether .............................................................. Dichloromethane; see Methylene chloride. Dichloromonofiuoromethane ................................................ 1.1- Dichloro-1-nitroethane ................................................ 1.2- Dichloropropane; see Propylene dichloride. DichSorotetrafluoroethane .................................................... Dichlorvos (DDVP) .............................................................. Dicyclopentadienyl iron ....................................................... Total dust ..................................................................... Respirable fraction ....................................................... Dieldrin ................................................................................ Diethylamine........................................................................ 2-Diethylaminoethanol......................................................... Diethyl ether, see Ethyl ether. Difiuorodibromomethane ..................................................... Diglycidyl ether (DGE)......................................................... Dihydroxybenzene; see Hydroquinone. Diisobutyl ketone................................................................. Diisopropylamine ................................................................. 4-Dimethylaminoazobenzene; see 1910.1015...................... Dimethoxymeihane; see Methylal. Dimethyl acetamide............................................................. Dimethylamine ..................................................................... 7440-47-3 2971-90-6 65966-93-2 7440-48-4 7440-50--8 136-78-7 1319-77-3 123-73-9; 4170-30-3 98-82-8 <4) 110-82-7 108-93-0 108-94-1 110-83-8 542-92-7 94-75-7 17702-41-9 8065-48-3 123-42-2 334-88-3 19287-45-7 96-12-8 107-66-4 84-74-2 95-50-1 106-46-7 91-94-1 75-71-8 118-52-5 50-29-3 75_34_3 540-59-0 111-44-4 75-43--4 594-72-9 76-14-2 62-73-7 102-54-5 60-57-1 109-89-7 100-37-8 75-81-6 2238-07-5 108-83-8 108-18-9 60-11-7 127-19-5 124-40-3 1 15 5 p) p> 0.2 0.1 0.1 1 5 2 50 300 50 50 300 75 0.05 50 0.2 0.1 15 5 22 6 245 5 1050 200 200 1015 200 10 0.3 0.1 240 0.4 0.1 1 (C)50 75 1000 100 200 (C)15 1000 <C)10 1000 25 10 100 (C)0.5 50 5 5 5 (C)300 450 4950 0.2 1 400 790 (C)90 4200 (C)60 7000 1 15 5 0.25 75 50 860 (C)2.8 290 20 10 35 10 18 Skin designation X X X X X X X X X X X X ii HWBUI0008665  1910.1000 29 CFR Ch. XVII (7-1-01 Edition) Table Z-1--Limits for Air Contaminants--Continued Substance CAS No. (c) ppm (a) < mg/m3 (b)1 Dimethylaminobenzene; see Xylidine. DimethytaniJine (N,N-Dimethylani)ine) .................................. Dimethylbenzene; see Xylene. Dimethyl-1,2'dibromo-2.2*dichloroethyl phosphate............... Dimethylformamide.............................................................. 2,6-Dimethyl-4-heptanone; see Diisobutyi ketone. 1.1- Dimethylhydrazine..................................................... Dimethyiphthaiate ................................................................ Dimethyl sulfate................................................................... Dinitrobenzene (all isomers) ............................................... (ortho) ........................................................................... (meta) ........................................................................... (para)............................................................................ Dinitro-o-cresol .................................................................... Dinitrotoluene ...................................................................... Dioxane (Diethylene dioxide) .............................................. Diphenyl (Biphenyl) ............................................................. Diphenytmethane diisocyanate; see Methylene bisphenyl isocyanate. Dipropylene glycol methyl ether.......................................... Di-sec octyl phthalate (Di-(2-ethylhexyl) phthalate) .............. Emery .................................................................................. Total dust ..................................................................... Respirable fraction ....................................................... Endrin .................................................................................. Epichlorohydrin.................................................................... EPN ..................................................................................... 1.2- Epoxypropane; see Propylene oxide. 2.3- Epoxy-l -propanol; see Glycidol. Ethanethiol; see Ethyl mercaptan. Ethanolamine....................................................................... 2-Ethoxyethano! (Cellosolve) .............................................. 2-Ethoxyethyl acetate (Cellosolve acetate).......................... Ethyl acetate........................................................................ Ethyl acrylate....................................................................... Ethyl alcohoi (Ethanol) ........................................................ Ethytamine ........................................................................... Ethyl amyl ketone (5-Methyl-5-heptanone) .......................... Ethyl benzene...................................................................... Ethyl bromide ...................................................................... Ethyl butyl ketone (3-Heptanone) ........................................ Ethyl chloride....................................................................... Ethyl ether ........................................................................... Ethyl formate ....................................................................... Ethyl mercaptan .................................................................. Ethyl silicate ........................................................................ Ethylene chlorohydrin.......................................................... Ethylenediamine .................................................................. Ethylene dibromide.............................................................. Ethylene dichloride (1,2-Dichloroethane) ............................. Ethylene glycol dinitrate ...................................................... Ethylene glycol methyl acetate; see Methyl cellosolve ace tate. Ethyleneimine; see 1910.1012 ............................................ Ethylene oxide; see 1910.1047 ........................................... Ethylidene chloride; see 1,1-Dichloroethane. N-Ethylmorphoiine ............................................................... Ferbam ................. Total dust ...... Ferrovanadium dust Fluorides (as F) ................................................................... Fluorine................................................................................ Fluorotrichloromethane (Trichlorofluoromethane) ................. Formaldehyde; see 1910.1048 ........................................... Formic acid.......................................................................... Furfural ................................................................................ Furfury! alcohol..... Grain dust (oat, wheat, barley) ........................................... Glycerin (mist) ...... Total dust ..................................................................... Respirable fraction ....................................................... Glycidol................. 121-69-7 300-76-5 68-12-2 57-14-7 131-11-3 77-78-1 528-29-0 99-65-0 100-25-4 534-52-1 25321-14-6 123-01-1 92-52-4 34590-94-8 117-81-7 12415-34-8 72-20-8 108-89-8 2104-64-5 141-43-5 110-80-5 111-15-0 141-78-6 140-88-5 64-17-5 75-04-7 541-85-5 100-41-4 74-96-4 106-35-4 75-00-3 60-29-7 109-94-4 75-08-1 78-10-4 107-07-3 107-15-3 106-03-4 107-06-2 628-06-8 151-56-4 75-21-8 100-74-3 14484-64-1 12604-58-0 c) 7782-41-4 75-69-4 50-00-0 64-18-6 98-01-1 98-00-0 56-81-5 556-52-5 5 10 0.5 1 100 0.2 100 5 3 200 100 400 25 1000 10 25 100 200 50 1000 400 100 (C)10 100 5 10 (C)0.2 20 0.1 1000 5 5 50 50 25 3 30 1 5 5 1 0.2 1.5 360 1 600 5 15 5 0.1 19 0.5 6 740 540 1400 100 1900 18 130 435 890 230 2600 1200 300 (C)25 850 1$ 25 F) P> (C)1 94 15 1 2.5 0.2 5600 9 20 200 10 15 5 150 Skin designation X X X X X X X X X X X X X X X X X X X 12 HWBUI0008666 Occupational Safety and Health Admin., Labor Table Z-1--Limits for Air Contaminants--Continued Substance CAS No. (c) ppm (a)' mg/m3 ( Glycol monoethyf ether, see 2-Ethoxyethanol. Graphite, natural, respirable dust........................... Graphite, synthetic ................................................ Total dust ....................................................... Respirable fraction ......................................... Guthion; see Azinphos methyl. Gypsum ................................................................ Total dust ...................................................... Respirable fraction ......................................... Hafnium ................................................................ Heptachlor............. Heptane (n-Heplane) Hexachloroethane .. Hexachloronaphthalene......................................... n-Hexane ............... 2-Hexanone (Methyl n-butyl ketone)..................... Hexone (Methyl isobutyl ketone)........................... sec-Hexyl acetate.................................................. Hydrazine .............. Hydrogen bromide .. Hydrogen chloride .. Hydrogen cyanide .. Hydrogen fluoride (as F) ....................................... Hydrogen peroxide ................................................ Hydrogen selenide (as Se) ................................... Hydrogen sulfide .................................................. Hydroquinone Iodine .................................................................... Iron oxide fume Isoamyl acetate .................................................... Isoamy! alcohol (primary and secondary) .............. Isobutyl acetate .................................................... Isobutyl alcohol..................................................... Isophorone............................................................ Isopropyl acetate ................................................... Isopropyl alcohol ................................................... Isopropylamine ..................................................... Isopropyl ether...................................................... isopropyl glycidyl ether (IGE)................................ Kaolin.................................................................... Total dust ....................................................... Respirable fraction ......................................... Ketene .................................................................. Lead, inorganic (as Pb); see 1910.1025 ................ Limestone............................................................. Total dust ..................................................... Respirable fraction ......................................... Lindane ................................................................. Lithium hydride ..................................................... L.P.G. (Liquefied petroleum gas).......................... Magnesite ............................................................. Total dust ....................................................... Respirable fraction ......................................... Magnesium oxide fume ......................................... Total particulate Matathion .............. Total dust ....... Maleic anhydride .... Manganese compounds (as Mn) .......................... Manganese fume (as Mn) ..................................... Marble................................................................... Total dust ....................................................... Respirable fraction ......................................... Mercury (aryl and inorganic) (as Hg) ..................... Mercury (organo) alkyl compounds (as Hg) .......... Mercury (vapor) (as Hg)........................................ Mesityl oxide.......................................................... Methanethiol; see Methyl mercaptan. Methoxychlor ......................................................... Total dust ....................................................... 2-Methoxyethanol (Methyl cellosolve).................... 2-Methoxyethyl acetate (Methyl cellosolve acetate) 7782-42-5 13397-24-5 7440-58-6 76-44-8 142-82-5 67-72-1 1335-87-1 110-54-3 591-78-6 108-10-1 108-84-9 302-01-2 10035-10-6 7647-01-0 74-90-8 7664-39-3 7722-84-1 7783-07-5 7783-06-4 123-31-9 7553-56-2 1309-37-1 123-92-2 123-51-3 110-19-0 78-83-1 78-59-1 108-21-4 67-63-0 75-31-0 108-20-3 4016-14-2 1332-58-7 463-61-4 7439-92-1 1317-65-3 58-89-9 7580-67-8 68476-85-7 546-93-0 1309-48-4 121-75-5 108-31-6 7439-96-5 7439-96-5 1317-65-3 7439-97-6 7439-97-6 7439-97-6 141-79-7 72-43-5 109-86-4 110-49-6 500 1 500 100 100 50 1 3 (C)5 10 1 0.05 (C)0,1 100 100 150 100 25 250 400 5 500 50 0,5 1000 0.25 25 25 25 p> 15 5 15 5 0. 0. 2000 10 0. 1800 410 410 300 1. 10 (C)7 11 <2) 1. 0. <2> 2 (C)1 10 525 360 700 300 140 950 980 12 2100 240 15 5 0. 15 5 0. 0. 1800 15 5 15 15 1 (C>5 (C>5 15 5 (2> i2) i2) 100 15 80 120 13 1910.1000 Skin designation X X X X X X X X X HWBUI0008667 1910.1000 29 CFR Ch. XVII (7-1-01 Edition) Table Z-l--Limits for Air Contaminants--Continued Substance CAS No. (c) ppm (a) ' mg/m3 (b)1 Skin designation Methyl acetate ..................................................................... Methyl acetylene (Propyne) ................................................. Methyl acetyfene-propadiene mixture (MAPP)..................... Methyl acrylate .................................................................... Methylal (Dimethoxy-methane) ............................................ Methyl alcohol ..................................................................... Methylamine ........................................................................ Methyl amyl alcohol; see Methyl isobutyl carbinol. Methyl n-amyl ketone .......................................................... Methyl bromide .................................................................... Methyl butyl ketone; see 2-Hexanone. Methyl celtosolve; see 2-Methoxyethanol. Methyl celiosolve acetate; see 2-Methoxyethyl acetate. Methyl chloride .................................................................... Methyl chloroform (1,1,1-Trichloroethane) ........................... Methylcyclohexane .............................................................. Methylcyclohexanol ............................................................. o-Methylcyclohexanone........................................................ Methylene chloride .............................................................. Methyl ethyl ketone (MEK); see 2-Butanone. Methyl formate..................................................................... Methyl hydrazine (Monomethyl hydrazine) .......................... Methyl iodide ....................................................................... Methyl isoamyl ketone.......................................................... Methyl isobutyl carbinol........................................................ Methyl isobutyl ketone; see Hexone. Methyl isocyanate................................................................ Methyl mercaptan................................................................ Methyl methacrylate ............................................................. Methyl propyl ketone; see 2-Pentanone. alpha-Methy! styrene ............................................................ Methylene bispheny! isocyanate (MO!) ................................ Mica; see Silicates. Molybdenum (as Mo) .......................................................... Insoluble compounds. Monomethyl aniline ............................................................. Monomethyl hydrazine; see Methyl hydrazine. Morpholine........................................................................... Naphtha (Coal tar)............................................................... Naphthalene ........................................................................ alpha-Naphthylamine; see 1910.1004 ................................. beta*Naphthy!amine; see 1910.1009 ................................... Nickel carbonyl (as Ni) ......................................................... Nickel, soluble compounds (as Ni) ...................................... Nitric acid............................................................................. Nitric oxide........................................................................... p-Nitroaniline ....................................................................... Nitrobenzene ....................................................................... 4-Nitrodiphenyl; see 1910.1003 ........................................... Nitroethane .......................................................................... Nitrogen dioxide .................................................................. Nitrogen trifluoride ............................................................... Nitroglycerin......................................................................... Nitromethane ....................................................................... 1-Nitropropane..................................................................... 2-Nitropropane..................................................................... N-Nitrosodimethylamine; see 1910.1016. Nitrotoiuene (all isomers) ..................................................... o-isomer ....................................................................... m-isomer...................................................................... p-isomer ....................................................................... Nilrotrichloromethane; see Chloropicrin. Octane................................................................................. Oxalic acid........................................................................... 79-20-9 74-99--7 96-33-3 109-67-5 67-56-1 74-89-5 110-43-0 74-83-9 74-87-3 71-55-6 108-87-2 25639-42-3 583-60-3 75-09-2 107-31-3 60-34-4 74-88-4 110-12-3 108-11-2 $24-83-9 74-93-1 80-62-6 98-83-9 101-68-6 7439-98-7 100-61-8 110-91-8 8030-30-6 91-20-3 134-32-7 91-59-6 13463-39-3 7440-02-0 7440-02-0 54-11-5 7697-37-2 10102-43-9 100-01-6 98-95-3 100-00-5 92-93-3 79-24-3 10102-44-0 7783-54-2 55-63-0 75-52-5 108-03-2 79-46-9 88-72-2 99-08-1 99-99-0 2234-13-1 111-65-9 8012-95-1 20816-12-0 144-62-7 200 1000 1000 10 1000 200 10 100 (C)20 610 1650 1800 35 3100 260 12 465 (C)80 350 500 100 100 100 (C)0.2 5 100 25 0.02 (C)10 100 (C)100 (C)0.02 P) 1900 2000 470 460 p> 250 (C)0.35 28 475 100 0.05 (C)20 410 (C)480 (C)0.2 5 15 29 20 70 100 400 10 50 0.001 2 25 1 1 100 <C)5 10 (Q0.2 100 25 25 5 0.007 1 1 0.5 5 30 6 5 1 310 (C)9 29 (C)2 250 90 90 30 0.1 500 2350 5 0.002 1 X X X X X X X X X X X X X X X X 14 HWBUI0008668 Occupational Safety and Health Admin., Labor 1910.1000 Table Z-l---Limits for Air contaminants--Continued Substance CAS No. (c) ppm (a) ' mg/m3 (b)1 Skin designation Oxygen difluoride .......... Ozone ........................... Paraquat, respirable dust Parathion ....................................................................... Particulates not otherwise regulated (PNOR)f. Total dust ............................................................... Respirable fraction ................................................. PCB; see Chlorodiphenyl (42% and 54% chlorine). Pentaborane .................................................................. Pentachloronaphthalene................................................. Pentachlorophenol......................................................... Pentaerythritol ............................................................... Total dust ............................................................... Respirable fraction ................................................. Pentane ......................................................................... 2-Pentanone (Methyl propyl ketone).............................. Perchloroethylene (Tetrachloroethylene) ....................... Perchloromethyi mercaptan ........................................... Perchloryl fluoride.......................................................... Petroleum distillates (Naphtha) (Rubber Solvent) .......... Phenol ........................................................................... p-Phenytene diamine..................................................... Phenyl ether, vapor....................................................... Phenyl ether-biphenyl mixture, vapor ............................ Phenylethylene; see Styrene. Phenyl glycidyl ether (PGE) .......................................... Phenylhydrazine ............................................................ Phosdrin (Mevinphos) ................................................... Phosgene (Carbonyl chloride)....................................... Phosphine...................................................................... Phosphoric acid............................................................. Phosphorus (yellow)...................................................... Phosphorus pentachloride.............................................. Phosphorus pentasulfide................................................ Phosphorus trichloride................................................... Phthalic anhydride......................................................... Pick) ram......................................................................... Total dust ............................................................... Respirable fraction ................................................. Picric acid ...................................................................... Pindone (2-Pivalyl-1,3-indandione) ................................ Plaster of Paris .............................................................. Total dust Respirable fraction ................................................. Platinum (as Pt)............................................................. Metal....... Soluble salts........................................................... Portland cement ............................................................ Total dust ............................................................... Respirable fraction ................ Propane ........................................ beta-Propriolactone; see 1910.1013 n-Propyl acetate ........................... n-Propyl alcohol............................................................. n-Propyl nitrate ........ Propylene dichloride . Propylene imine....... Propylene oxide....... Propyne; see Methyl acetylene. Pyrethrum ...................................................................... Pyridine.......................................................................... Quinone ......................................................................... RDX; see Cyclonite. Rhodium (as Rh), metal fume and insoluble compounds Rhodium (as Rh), soluble compounds........................... Ronnel ........................................................................... Rotenone ....................................................................... Rouge ............................................................................ Total dust ............................................................... Respirable fraction ................................................. 7783-41-7 10028-15-6 4685-14-7; 1910-42-5; 2074-50-2 56-38-2 19624-22-7 1321-64-8 87-86-5 115-77-5 109-66-0 107-87-9 127-18-4 594-42-3 7616-94-6 108-95-2 106-50-3 101-84-8 122-60-1 100-63-0 7786-34-7 75--44--5 7803-51-2 7664-38-2 7723-14-0 10026-13-8 1314-80-3 7719-12-2 85-44-9 1918-02-1 88-89-1 83-26-1 26499-65-0 7440-06-4 65997-15-1 74-98-6 57_57_8 109-60-4 71-23-8 627-13-4 78-67-5 75-55-8 75-66-9 8003-34-7 110-86-1 106-51-4 7440-16-6 7440-16-6 299-84-3 83-79-4 0.05 0.1 0.1 0.2 0.5 0.005 1000 200 0.1 3 500 5 1 1 10 5 0.1 0.3 0.5 2 0.1 15 5 0.01 0.5 0.5 15 5 2950 700 p> 0.8 13.5 2000 19 0.1 7 7 60 22 0.1 0.4 0.4 1 0.1 1 1 3 12 15 5 0.1 0.1 15 5 1000 200 200 25 75 2 100 5 0.1 0.002 15 5 1800 840 500 110 350 5 240 5 15 0.4 0.1 0.001 15 5 15 5 X X X X X X X X X X 15 HWBUI0008669  1910.1000 29 CFR Ch. XVII (7-1-01 Edition) Table Z-1--Limits for Air Contaminants--Continued Substance CAS No. (c) ppm (a)' mg/m3 (b)1 Skin designation Selenium compounds (as Se).............................................. Selenium hexafluoride (as Se) ............................................. Silica, amorphous, precipitated and gel............................... Silica, amorphous, diatomaceous earth, containing less than 1% crystalline silica. Silica, crystalline cristobalite, respirable dust ....................... Silica, crystalline quartz, respirable dust.............................. Silica, crystalline tripoli (as quartz), respirable dust ............. Silica, crystalline tridymite, respirable dust .......................... Silica, fused, respirable dust ................................................ Silicates (less than 1% crystalline silica) ............................. Mica (respirable dust) ................................................... Soapstone, total dust .................................................... Soapstone, respirable dust ........................................... Talc (containing asbestos); use asbestos limit; see 29 CFR 1910.1001. Talc (containing no asbestos), respirable dust.............. Tremolite. asbestiform; see 1910.1001. Silicon.................................................................................. Total dust ......... Respirable fraction ....................................................... Silicon carbide ......... Total dust ......... Respirable fraction ....................................................... Silver, metal and soluble compounds (as Ag) ..................... Soapstone; see Silicates. Sodium fluoroacetate .......................................................... Sodium hydroxide................................................................ Starch ..................... Total dust ..................................................................... Respirable fraction ....................................................... Stibine..................... Stoddard solvent ................................................................. Strychnine............................................................................ Styrene Sucrose Total dust ..................................................................... Respirable fraction ....................................................... Sulfur dioxide....................................................................... Sulfur hexafluoride .............................................................. Sulfuric acid ......................................................................... Sulfur monochloride ............................................................ Sulfur pentafluoride .. Sulfuryl fluoride........ Systox; see Demeton. 2,4,5-T (2.4,5-trichlorophenoxyacetic acid) .......................... Talc; see Silicates. Tantalum, metal and oxide dust........................................... TEDP (Sulfotep) .................................................................. Tellurium and compounds (as Te)....................................... Tellurium hexafluoride (as Te) ............................................. Temephos................ Total dust ......... Respirable fraction ....................................................... TEPP (Tetraethyl pyrophosphate)........................................ Terphenyls............... 1,1,1,2TetrachlorO'2,2-difluoroethane ................................. 1.1.2.2- Tetrachloro-l ,2-difluoroetbane ............................. 1.1.2.2- Tetrachloroethane ................................................ Tetrachloroethylene; see Perchloroethylene. Tetrachloromethane; see Carbon tetrachloride. Tetrachloronaphthalene....................................................... Tetraethyl lead (as Pb)........................................................ Tetrahydrofuran ................................................................... Tetramethyl lead (as Pb)..................................................... Tetramethyl succinonitrile.................................................... Tetranitromethane ............................................................... Tetryl (2,4,6-Trinitrophenylmethylnitramine)......................... Thallium, soluble compounds (asTI) ................................... 4,4'-Thiobis (6-tert, Butyl-m*cresol) Total dust .............................. Respirable fraction ................ 7782-49-2 7783-79-1 112926-00-8 61790-53-2 14464-46-1 14808-60-7 1317-95-9 15468-32-3 60676-86-0 12001-26-2 14807-96-6 7440-21-3 409-21-2 7440-22-4 62-74-8 1310-73-2 9005-25-6 7803-52-3 8052-41-3 57-24-9 100-42-5 57-50-1 7446-09-5 2551-62-4 7664-93-9 10025-67-9 5714-22-7 2699-79-6 93-76-5 7440-25-7 3689-24-5 13494-80-9 7783-60-4 3383-96-6 107-49-3 26140-60-3 76-11-9 76-12-0 79-34-5 1335-68-2 78-00-2 109-99-9 75-74-1 3333-52-6 509-14-8 479-45-6 7440-28-0 96-69-5 0.2 0.05 0.4 p> p> pi pi p) pi p> p> p> p> p> p> 0.1 500 5 1000 1 0.025 5 0.02 (C)1 500 500 5 15 5 15 5 0.01 0.05 2 15 5 0.5 2900 0.15 n 15 5 13 6000 1 6 0.25 20 10 5 0.2 0.1 0.2 15 5 0.05 (C)9 4170 4170 35 200 0.5 1 2 0.075 590 0.075 3 8 1.5 0.1 15 5 X X X X X X X X X X 16 HWBUI0008670 Occupational Safety and Health Admin., Labor 1910.1000 Table Z-1--Limits for Air Contaminants--Continued Substance CAS No. (c) ppm (a)' mg/m3 (b)1 Skin designation Thiram ................................................................. Tin, inorganic compounds (except oxides) (as Sn) Tin, organic compounds (as Sn).......................... Titanium dioxide .................................................. Total dust ..................................................... Toluene................................................................ Toluene-2,4-diisocyanate (TO!) ............................ o-Toluidine........................................................... Toxaphene; see Chlorinated camphene. Tremolite; see Silicates. Tributyl phosphate............................................... 1.1.1- Trichloroethane; see Methyl chloroform. 1.1.2- Trichioroethane ...................................... Trichloroethylene ................................................. Trichloromethane; see Chloroform. Trichloronaphthalene.................................. ......... 1.2.3- Trichloropropane ..................................... 1.1,2-Trichloro-1,2,2-trifluoroethane ..................... Triethylamine ....................................................... Trifluorobromomethane ....................................... 2.4.6- Trinitrophenoi; see Picric acid. 2.4.6- Trinitrophenylmethylnitramine; see Tetryl. 2.4.6- Trinitrotoluene (TNT) .............................. Triorthocresyl phosphate..................................... Triphenyl phosphate............................................ Turpentine ........................................................... Uranium (as U) .................................................... Soluble compounds...................................... Insoluble compounds .................................... Vanadium ............................................................ Respirable dust (as V2 O5) ............................. Fume (as V2 Os) .............................................. Vegetable oil mist................................................ Total dust ..................................................... Respirable fraction ....................................... Vinyl benzene; see Styrene. Vinyl chloride; see 1910.1017.............................. Vinyl cyanide; see Acrylonitrile. Vinyl toluene ........................................................ Warfarin ............................................................... Xylenes (o-, m-, p-isomers)................................. Xytidine ................................................................ Yttrium ................................................................. Zinc chloride fume............................................... Zinc oxide fume................................................... Zinc oxide ........................................................... Total dust .................................................... Respirable fraction ....................................... Zinc stearate....................................................... Total dust .................................................... Respirable fraction ....................................... Zirconium compounds (as Zr) ............................. 137-26-6 7440-31-5 7440-31-6 13463-67-7 108-88-3 584-84-9 95-63--4 126-73-8 79-00-6 79-01-6 1321-65-9 96-18-4 76-13-1 121-44-6 75-63-8 118-96-7 78-30-6 115-66-6 8006-64-2 7440-61-1 1314-62-1 75-01-4 25013-15-4 81-81-2 1330-20-7 1300-73-8 7440-65-5 7646-65-7 1314--13--2 1314-13-2 557-05-1 7440-67-7 (C)0,02 5 10 50 1000 25 1000 100 100 100 5 5 2 0.1 15 0 (C)0.14 22 5 45 pi 5 300 7600 100 6100 1.5 0.1 3 560 0.05 0.25 (C)0.5 (Q0.1 15 5 480 0.1 435 25 1 1 5 15 5 15 5 5 X X X X X 1 The PELs are 8-hour TWAs unless otherwise noted; a (C) designation denotes a ceiling limit. They are to be determined from breathing-zone air samples. (a) Parts of vapor or gas per million parts of contaminated air by volume at 25 C and 760 torr. (b) Milligrams of substance per cubic meter of air. When entry is in this column only, the value is exact; when listed with a ppm entry, it is approximate. (c)The CAS number is for information only. Enforcement is based on the substance name. For an entry covering more than one metal compound, measured as the metal, the CAS number for the metal is given--not CAS numbers for the individual com pounds. (d)The final benzene standard in 1910.1028 applies to all occupational exposures to benzene except in some circumstances the distribution and sale of fuels, sealed containers and pipelines, coke production, oil and gas drilling and production, natural gas processing, and the percentage exclusion for liquid mixtures; for the excepted subsegments, the benzene limits in Table Z-2 apply. See 1910.1028 for specific circumstances. (e)This 8-hour TWA applies to respirable dust as measured by a vertical elutriator cotton dust sampler or equivalent instru ment. The time-weighted average applies to the cottom waste processing operations of waste recycling (sorting, blending, clean ing and willowing) and gametting. See also 1910.1043 for cotton dust limits applicable to other sectors. (f) All inert or nuisance dusts, whether mineral, inorganic, or organic, not listed specifically by substance name are covered by the Particulates Not Otherwise Regulated (PNOR) limit which is the same as the inert or nuisance dust limit of Table Z-3. 2 See Table Z-2. 3 See Table Z-3. 4 Varies with compound. 17 HWBUI0008671 1910.1000 29 CFR Ch. XVII (7-1-01 Edition) Table Z-2 Substance 8-hour time weighted av erage Acceptable ceiling con centration Acceptable maximum peak above the acceptable ceiling con centration for an 8-hr shift Concentration Maximum dura tion Benzene* (Z37.40-1969) ........... ........................... Beryllium and beryllium compounds (Z37.29-1970) Cadmium fumeb (Z37.5--1970)..... Cadmium dust* (Z37.5-1970)...... Carbon disulfide (Z37.3-1968) .... Carbon tetrachloride (Z37.17-1967) ...................... Chromic acid and chromates (Z37.7-1971) Ethylene dibromide (Z37.31-1970)............ Ethylene dichloride (Z37.21-1969) ............ Fluoride as dust (Z37.28-1969) .. Formaldehyde; see 1910.1048 ... Hydrogen fluoride (Z37.28-1969) Hydrogen sulfide (Z37.2-1966) .. Mercury (Z37.8-1971)............ Methyl chloride (Z37.18-1969) Methylene Chloride: See 1919.52.. Organo (alkyl) mercury (Z37.30-1969) Styrene (Z37.15-1969) ..................... Tetrachloroethylene (Z37.22-1967) .... Toluene (Z37.12-1967)............. Trichloroethylene (Z37.19-1967) 10 ppm ... 2 jj.g/m3 ... 0.1 mg/m3 0.2 mg/m3 20 ppm ... 10 ppm ... 20 ppm 50 ppm 2.5 mg/m3 3 ppm .... 25 ppm .... 5 jjig/m3 .... 0.3 mg/m3 0.6 mg/m3. 30 ppm .... 25 ppm .... 1 mg/10m3. 30 ppm .... 100 ppm ... 50 ppm . 25 ng/m3 100 ppm 200 ppm 50 ppm . 200 ppm 20 ppm 50 ppm 100 ppm 1 mg/10m3 .... 200 ppm ...... 300 ppm 0.01 mg/m3 ... 0.04 mg/m3 ... 100 ppm ...... 200 ppm ...... 600 ppm 100 ppm 200 ppm 300 ppm 200 ppm 100 ppm 300 ppm 200 ppm 500 ppm 300 ppm 10 minutes. 30 minutes. 30 minutes. 5 min. in any 4 hrs. 5 minutes. 5 min. in any 3 hrs. 10 mins. once, only if no other meas. exp. occurs. 5 mins, in any 3 hrs. 5 mins, in any 3 hrs. 5 mins, in any 3 hrs. 10 minutes. 5 mins, in any 2 hrs. * This standard applies to the industry segments exempt from the 1 ppm 8-hour TWA and 5 ppm STEL of the benzene stand ard at 1910.1028. *> This standard applies to any operations or sectors for which the Cadmium standard, 1910.1027, is stayed or otherwise not in effect Table Z-3--Mineral Dusts Substance Silica: Crystalline Quartz (Respirable).............................................................................................................. mppcf* 250 * %Si02+5 mg/m3 10 mg/m3c % Si02 + 2 30 mg/m3 % Si02 + 2 Cristobaiite: Use Vfc the value calculated from the count or mass formulae for quartz Tridymite: Use V5 the value calculated from the formulae for quartz Amorphous, including natural diatomaceous earth............................................................................. 80 mg/m3 20 %Si02 Silicates (less than 1% crystalline silica): Mica............................................................................................................................................ Soapstone .................................................................................................................................. Talc (not containing asbestos) .................................................................................................... Talc (containing asbestos) Use asbestos limit Tremolite, asbestiform (see 29 CFR 1910.1001). Portland cement......................................................................................................................... Graphite (Natural).............................................................................................................................. Coal Dust: 20 20 20* 50 15 Respirable fraction less than 5% Si02 ....................................................................................... 2.4 mg/m3* 18 HWBUI0008672 Occupational Safety and Health Admin., Labor Table 2-3--Mineral Dusts--Continued Substance 1910.1001 mppcf* mg/m3 10 mg/m3* %Si02+2 Inert or Nuisance Dust:d Respirable fraction ..................................................................................................................... Total dust ................................................................................................................................... 15 5 mg/m3 50 15 mg/m3 Note--Conversion factors - mppcf x 35.3 = million particles per cubic meter = particles per c.c. Millions of particles per cubic foot of air, based on impinger samples counted by iight-fieid techniques. bThe percentage of crystalline silica in the formula is the amount determined from airborne samples, except in those instances in which other methods have been shown to be applicable. Containing less than 1% quartz; if 1% quartz or more, use quartz limit. All inert or nuisance dusts, whether mineral, inorganic, or organic, not listed specifically by substance name are covered by this limit, which is the same as the Particulates Not Otherwise Regulated (PNOR) limit in Table Z-1. Both concentration and percent quartz for the application of this limit are to be determined from the fraction passing a sizeselector with the following characteristics; Aerodynamic diameter (unit density sphere) Percent passing selector 2...................................................................................................................................................................... 2.5 3.5 5.0 10 90 75 50 25 0 The measurements under this note refer to the use of an AEC (now NRC) instrument. The respirable fraction of coa! dust is determined with an MRE; the figure corresponding to that of 2.4 mg/m3 in the table for coal dust is 4.5 mg/m3K- [58 FR 35340, June 30. 1993; 58 FR 40191, July 27, 1993, as amended at 61 FR 56831, Nov. 4, 1996; 62 FR 1600, Jan. 10,1997; 62 FR 42018, Aug. 4, 1997] 11910.1001 Asbestos. (a) Scope and application. (1) This sec tion applies to all occupational expo sures to asbestos in all industries cov ered by the Occupational Safety and Health Act, except as provided in para graph (a)(2) and (3) of this section. (2) This section does not apply to construction work as defined in 29 CFR 1910.12(b). (Exposure to asbestos in con struction work is covered by 29 CFR 1926.1101). (3) This section does not apply to ship repairing, shipbuilding and shipbreaking employments and related employments as defined in 29 CFR 1915.4. (Exposure to asbestos in these employments is covered by 29 CFR 1915.1001). (b) Definitions. Asbestos includes chrysotile, amosite, crocidolite, tremolite asbestos, anthophyllite asbestos, actinolite as bestos, and any of these minerals that have been chemically treated and/or al tered. Asbestos-containing material (ACM) means any material containing more than 1% asbestos. Assistant Secretary means the Assist ant Secretary of Labor for Occupa tional Safety and Health, U.S. Depart ment of Labor, or designee. Authorized person means any person authorized by the employer and re quired by work duties to be present in regulated areas. Building/facility owner is the legal en tity, including a lessee, which exercises control over management and record keeping functions relating to a build ing and/or facility in which activities covered by this standard take place. Certified industrial hygienist (CIH) means one certified in the practice of industrial hygiene by the American Board of Industrial Hygiene. Director means the Director of the National Institute for Occupational Safety and Health, U.S. Department of Health and Human Services, or des ignee. Employee exposure means that expo sure to airborne asbestos that would occur if the employee were not using respiratory protective equipment. Fiber means a particulate form of as bestos 5 micrometers or longer,with a 19 HWBUI0008673