Number of EmployeesMinimum Number
of Facilities
20 or less1
20 or more1 toilet seat and 1 urinal per 40 workers
200 or more1 toilet seat and 1 urinal per 50 workers

(f) Washing facilities.

(f)(1) The employer shall provide adequate washing facilities for employees engaged in the application of paints, coating, herbicides, or insecticides, or in other operations where contaminants may be harmful to the employees. Such facilities shall be in near proximity to the worksite and shall be so equipped as to enable employees to remove such substances.

(f)(2) General. Washing facilities shall be maintained in a sanitary condition.

CFR# 1926.52 - Occupational noise exposure.

(a) Protection against the effects of noise exposure shall be provided when the sound levels exceed those shown in Table D-2 of this section when measured on the A-scale of a standard sound level meter at slow response.

(b) When employees are subjected to sound levels exceeding those listed in Table D-2 of this section, feasible administrative or engineering controls shall be utilized. If such controls fail to reduce sound levels within the levels of the table, personal protective equipment as required in Subpart E, shall be provided and used to reduce sound levels within the levels of the table.

TABLE D-2
Permissible Noise Exposures
Duration per Day, HoursSound Level
dBA Slow
Response
8

6

4

3

2

1 1/2

1

1/2

1/4 or less

90

92

95

97

100

102

105

110

115

(c) If the variations in noise level involve maxima at intervals of 1 second or less, it is to be considered continuous.

(d)(1) In all cases where the sound levels exceed the values shown herein, a continuing, effective hearing conservation program shall be administered.

(d)(2)(i) When the daily noise exposure is composed of two or more periods of noise exposure of different levels, their combined

effect should be considered, rather than the individual effect of each. Exposure to different levels for various periods of time shall be computed according to the formula set forth in paragraph (d)(2)(ii) of this section.

(d)(2)(ii) Fe = (T1 / L1) + (T2 / L2) + ... + (Tn / Ln) where:

Fe = The equivalent noise exposure factor.

T = The period of noise exposure at any essentially constant level.

L = The duration of the permissible noise exposure at the constant level (from Table D-2).

If the value of Fe exceeds unity (1) the exposure exceeds permissible levels.

(d)(2)(iii) A sample computation showing an application of the formula in paragraph (d)(2)(ii) of this section is as follows. An employee is exposed at these levels for these periods:

110 db A 1/4 hour.

100 db A 1/2 hour.

90 db A 1 1/2 hours.

Fe = (1/4/1/2) + (1/2/2) + (1 1/2/8)

Fe = 0.500 + 0.25 + 0.188

Fe = 0.938

Since the value of Fe does not exceed unity, the exposure is within permissible limits.

(e) Exposure to impulsive or impact noise should not exceed 140 dB peak sound pressure level.

CFR# 1926.54 - Nonionizing radiation.

(a) Only qualified and trained employees shall be assigned to install, adjust, and operate laser equipment.

(b) Proof of qualification of the laser equipment operator shall be available and in possession of the operator at all times.

(c) Employees, when working in areas in which a potential exposure to direct or reflected laser light greater than 0.005 watts (5 milliwatts) exists, shall be provided with antilaser eye protection devices as specified in Subpart E of this part.

(d) Areas in which lasers are used shall be posted with standard laser warning placards.

(e) Beam shutters or caps shall be utilized, or the laser turned off, when laser transmission is not actually required. When the laser is left unattended for a substantial period of time, such as during lunch hour, overnight, or at change of shifts, the laser shall be turned off.

(f) Only mechanical or electronic means shall be used as a detector for guiding the internal alignment of the laser.

(g) The laser beam shall not be directed at employees.

(h) When it is raining or snowing, or when there is dust or fog in the air, the operation of laser systems shall be prohibited where practicable; in any event, employees shall be kept out of range of the area of source and target during such weather conditions.

(i) Laser equipment shall bear a label to indicate maximum output.

(j) Employees shall not be exposed to light intensities above:

(j)(1) Direct staring: 1 micro-watt per square centimeter;

(j)(2) Incidental observing: 1 milliwatt per square centimeter;

(j)(3) Diffused reflected light: 2 1/2 watts per square centimeter.

(k) Laser unit in operation should be set up above the heads of the employees, when possible.

CFR# 1926.55 - Gases, vapors, fumes, dusts, and mists.

(a) Exposure of employees to inhalation, ingestion, skin absorption, or contact with any material or substance at a concentration above those specified in the "Threshold Limit Values of Airborne Contaminants for 1970" of the American Conference of Governmental Industrial Hygienists, shall be avoided. See Appendix A to this section.

(b) To achieve compliance with paragraph (a) of this section, administrative or engineering controls must first be implemented whenever feasible. When such controls are not feasible to achieve full compliance, protective equipment or other protective measures shall be used to keep the exposure of employees to air contaminants within the limits prescribed in this section. Any equipment and technical measures used for this purpose must first be approved for each particular use by a competent industrial hygienist or other technically qualified person. Whenever respirators are used, their use shall comply with 1926.103.

(c) Paragraphs (a) and (b) of this section do not apply to the exposure of employees to airborne asbestos, tremolite, anthophyllite, or actinolite dust. Whenever any employee is exposed to airborne asbestos, tremolite, anthophyllite, or actinolite dust, the requirements of 1910.1101 or 1926.58 of this title shall apply.

(d) Paragraphs (a) and (b) of this section do not apply to the exposure of employees to formaldehyde. Whenever any employee is exposed to formaldehyde, the requirements of 1910.1048 of this title shall apply.

CFR# 1926.55 - Appendix A - Gases, vapors, fumes, dusts, and mists.

NOTE: Because of the length of the table, explanatory Footnotes applicable to all substances are given below. Footnotes specific only to a limited number of substances are also shown within the table.

Footnotes for Appendix A
2See Mineral Dusts Table.
3Use Asbestos Limit 1926.58
4See 1926.58
*The PELs are 8-hour TWAs unless otherwise noted; a (C) designation denotes a ceiling limit.
**As determined from breathing-zone air samples.
aParts of vapor or gas per million parts of contaminated air by volume at 25 degrees C and 760 torr.
bMilligrams 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.
dThe 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 compounds.
gFor sectors excluded from 1926.1128 the limit is 10 ppm TWA.
jMillions of particles per cubic foot of air, based on impinger samples counted by light-field techniques.
kThe 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.
mCovers all organic and inorganic particulates not otherwise regulated. Same as Particulates Not Otherwise Regulated.

The 1970 TLV uses letter designations instead of a numerical value as follows:

A(2)Polytetrafluoroethylene decomposition products. Because these products decompose in part by hydrolysis in alkaline solution, they can be quantitatively determined in air as fluoride to provide an index of exposure. No TLV is recommended pending determination of the toxicity of the products, but air concentrations should be minimal.
A(3)Gasoline and/or Petroleum distillates. The composition of these materials varies gratly and thus a single TLV for all types of these materials is no longer applicable. The content of benzene, other aromatics and additives should be determined to arrive at the appropriate TLV.
ESimple asphyxiants. The limiting factor is the available oxygen which shall be at least 19.5 percent and be within the requirements addressing explosion in part 1926.

CONTAMINANTS FOR CONSTRUCTION

SubstanceCAS No.dppmamg/m3bSkin
Designation
Abate; see Temephos.
Acetaldehyde75-07-0200360
Acetic acid.64-19-71025
Acetic anhydride108-24-7520
Acetone67-64-110002400
Acetonitrile75-05-84070
2-Acetylaminofluorene; see 1926.111453-96-3
Acetylene74-86-2E
Acetylene dichloride; see 1, 2-Dichloroethylene
Acetylene tetrabromide79-27-6114
Acrolein107-02-80.10.25
Acrylamide79-06-1 0.3X
Acrylonitrile; see 1926.1145107-13-1
Aldrin309-00-2 0.25X
Allyl alcohol107-18-625X
Allyl chloride107-05-113
Allyl glycidyl ether (AGE)106-92-3(C)10(C)45
Allyl propyl disulfide2179-59-1212
alpha-Alumina1344-28-1
Total dust
Respirable fraction
Alundum; see alpha-Alumina
4-Aminodiphenyl; see 1926.111192-67-1
2-Aminoethanol; see Ethanolamine
2-Aminopyridine504-29-00.52
Ammonia7664-41-75035
Ammonium sulfamate7773-06-0
Total dust 15
Respirable fraction 5
n-Amyl acetate628-63-7100525
sec-Amyl acetate626-38-0125650
Aniline and homologs62-53-3519X
Anisidine (o-, p-isomers)29191-52-4 0.5X
Antimony and compounds (as Sb)7440-36-0 0.5
ANTU (alpha Naphthylthiourea)86-88-4 0.3
Argon7440-37-1E
Arsenic, inorganic compounds (as As); see 1926.11187440-38-2
Arsenic, organic compounds (as As)7440-38-2 0.5
Arsine7784-42-10.050.2
Asbestos; see 1926.58
Azinphos-methyl86-50-0 0.2X
Barium, soluble compounds (as Ba)7440-39-3 0.5
Benzene g; see 1926.112871-43-2
Benzidine; see 1926.111092-87-5
p-Benzoquinone; see Quinone
Benzo a pyrene; see Coaltarpitch volatiles
Benzoyl peroxide94-36-0 5
Benzyl chloride100-44-715
Beryllium and beryllium compounds (as Be)7440-41-7 0.002
Biphenyl; see Diphenyl
Bisphenol A; see Diglycidyl ether
Boron oxide1303-86-2
Total dust 15
Boron tribromide10294-33-4110
Boron trifluoride7637-07-2(C)1(C)3
Bromine7726-95-60.10.7
Bromine pentafluoride7789-30-20.10.7
Bromoform75-25-20.55X
*Butadiene (1, 3-Butadiene); See 29 CFR 1910.1051; 29 CFR 1910.19106-99-01 ppm/5 ppm STEL
Butanethiol; see Butyl mercaptan
2-Butanone (Methyl ethyl ketone)78-93-3200590
2-Butoxyethanol111-76-250240X
n-Butyl-acetate123-86-4150710
sec-Butyl acetate105-46-4200950
tert-Butyl-acetate540-88-5200950
n-Butyl alcohol71-36-3100300
sec-Butyl alcohol78-92-2150450
tert-Butyl alcohol75-65-0100300
Butylamine109-73-9(C)5(C)15X
tert-Butyl chromate (as CrO3)1189-85-1 (C)0.1X
n-Butyl glycidyl ether (BGE)2426-08-650270
Butyl mercaptan109-79-50.51.5
p-tert-Butyltoluene98-51-11060
Cadmium (as Cd); see 1910.10277440-43-9
Calcium Carbonate1317-65-3
Total dust
Respirable fraction
Calcium oxide1305-78-8 5
Calcium sulfate7778-18-9
Total dust 15
Respirable fraction 5
Camphor, synthetic76-22-2 2
Carbaryl (Sevin)63-25-2 5
Carbon black1333-86-4 3.5
Carbon dioxide124-38-950009000
Carbon disulfide75-15-02060X
Carbon monoxide630-08-05055
Carbon tetrachloride56-23-51065X
Cellulose9004-34-6
Total dust
Respirable fraction
Chlordane57-74-9 0.5X
Chlorinated camphene8001-35-2 0.5X
Chlorinated diphenyl oxide55720-99-5 0.5
Chlorine7782-50-513
Chlorine dioxide10049-04-40.10.3
Chlorine trifluoride7790-91-2(C)0.1(C)0.4
Chloroacetaldehyde107-20-0(C)1(C)3
a-Chloroacetophenone (Phenacyl chloride)532-27-40.050.3
Chlorobenzene108-90-775350
o-Chlorobenzylidene malononitrile2698-41-10.050.4
Chlorobromomethane74-97-52001050
2-Chloro-1, 3-butadiene; See beta-Chloroprene
Chlorodiphenyl (42 percent Chlorine) (PCB)53469-21-9 1X
Chlorodiphenyl (54 percent Chlorine) (PCB)11097-69-1 0.5X
1-Chloro-2, 3-epoxypropane; See Epichlorohydrin
2-Chloroethanol; See Ethylene chlorohydrin
Chloroethylene; See Vinylchloride
Chloroform (Trichloromethane)67-66-3(C)50(C)240
bis (Chloromethyl) ether; see 1926.1108542-88-1
Chloromethyl methyl ether; see 1926.1106107-30-2
1-Chloro-1-nitropropane600-25-920100
Chloropicrin76-06-20.10.7
beta-Chloroprene126-99-82590X
Chromic acid and chromates (as CrO3)Varies with compound 0.1
Chromium (II) compounds (as Cr)7440-47-3 0.5
Chromium (III) compounds (as Cr)7440-47-3 0.5
Chromium metal and insol. salts (as Cr)7440-47-3 1
Chrysene; see Coal tar pitch volatiles
Coal tar pitch volatiles (benzene soluble fraction), anthracene, BaP, phenanthrene, acridine, chrysene, pyrene65996-93-2 0.2
Cobalt metal, dust, and fume (as Co)7440-48-4 0.1
Coke oven emissions; see 1926.1129 0.15
Copper7440-50-8
Fume (as Cu) 0.1
Dusts and mists (as Cu) 1
Corundum; see Emery
Cottondust (raw) 1
Cragherbicide (Sesone)136-78-7
Total dust
Respirable fraction
Cresol, all isomers1319-77-3522X
Crotonaldehyde123-73-9
4170-30-3
26
Cumene98-82-850245X
Cyanides (as CN)Varies with Compound 5X
Cyanogen460-19-510
Cyclohexane110-82-73001050
Cyclohexanol108-93-050200
Cyclohexanone108-94-150200
Cyclohexene110-83-83001015
Cyclonite121-82-4 1.5X
Cyclopentadiene542-92-775200
DDT, see Dichlorodiphenyltrichloroethane
DDVP, see Dichlorvos
2, 4-D (Dichlorophenoxyacetic acid)94-75-7 10
Decaborane17702-41-90.050.3X
Demeton (Systox)8065-48-3 0.1X
Diacetone alcohol (4-Hydroxy-4-methyl-2-pentanone)123-42-250240
1, 2-Diaminoethane; see Ethylenediamine
Diazomethane334-88-30.20.4
Diborane19287-45-70.10.1
1, 2-Dibromo-3-chloropropane (DBCP); see 1926.114496-12-8
1, 2-Dibromoethane; see Ethylene dibromide
Dibutyl phosphate107-66-415
Dibutyl phthalate84-74-2 5
Dichloroacetylene7572-29-4(C)0.1(C)0.4
o-Dichlorobenzene95-50-1(C)50(C)300
p-Dichlorobenzene106-46-775450
3, 3'-Dichlorobenzidine; see 1926.110791-94-1
Dichlorodifluoromethane75-71-810004950
1, 3-Dichloro-5, 5-dimethyl hydantoin118-52-5 0.2
Dichlorodiphenyltrichloroethane (DDT)50-29-3 1X
1, 1-Dichloroethane75-34-3100400
1, 2-Dichloroethane; see Ethylene dichloride
1, 2-Dichloroethylene540-59-0200790
Dichloroethyl ether111-44-4(C)15(C)90X
Dichloromethane; see Methylene chloride
Dichloromonofluoromethane75-43-410004200
1, 1-Dichloro-1-nitroethane594-72-9(C)10(C)60
1, 2-Dichloropropane; see Propylene dichloride
Dichlorotetrafluoroethane76-14-210007000
Dichlorvos (DDVP)62-73-7 1X
Dieldrin60-57-1 0.25X
Diethylamine109-89-72575
2-Diethylaminoethanol100-37-81050X
Diethylene triamine111-40-0(C)10(C)42X
Diethyl ether; see Ethyl ether
Difluorodibromomethane75-61-6100860
Diglycidyl ether (DGE)2238-07-5(C)0.5(C)2.8
Dihydroxybenzene; see Hydroquinone
Diisobutyl ketone108-83-850290
Diisopropylamine108-18-9520X
4-Dimethylaminoazobenzene; see 1926.111560-11-7
Dimethoxymethane; see Methylal
Dimethyl acetamide127-19-51035X
Dimethylamine124-40-31018
Dimethylaminobenzene; see Xylidine
Dimethylaniline (N, N-Dimethylaniline)121-69-7525X
Dimethylbenzene; see Xylene
Dimethyl-1, 2-dibromo-2, 2-dichloroethyl phosphate300-76-5 3
Dimethylformamide68-12-21030X
2, 6-Dimethyl-4-heptanone; see Diisobutyl ketone
1, 1-Dimethylhydrazine57-14-70.51X
Dimethylphthalate131-11-3 5
Dimethyl sulfate77-78-115X
Dinitrobenzene
(all isomers) 1X
(ortho)528-29-0
(meta)99-65-0
(para)100-25-4
Dinitro-o-cresol534-52-1 0.2X
Dinitrotoluene25321-14-6 1.5X
Dioxane (Diethylene dioxide)123-91-1100360X
Diphenyl (Biphenyl)92-52-40.21
Diphenylamine122-39-4 10
Diphenylmethane diisocyanate; see Methylene bisphenyl isocyanate
Dipropylene glycol methyl ether34590-94-8100600X
Di-sec octyl phthalate (Di-2-ethylhexyl) phthalate)117-81-7 5
Emery12415-34-8
Total dust
Respirable fraction
Endosulfan115-29-7 0.1X
Endrin72-20-8 0.1X
Epichlorohydrin106-89-8519X
EPN2104-64-5 0.5X
1, 2-Epoxypropane; see Propylene oxide
2, 3-Epoxy-1-propanol; see Glycidol
Ethane74-84-0E
Ethanethiol; see Ethyl mercaptan
Ethanolamine141-43-536
2-Ethoxyethanol (Cellosolve)110-80-5200740X
2-Ethoxyethyl acetate (Cellosolve acetate)111-15-9100540X
Ethyl acetate141-78-64001400
Ethyl acrylate140-88-525100X
Ethyl alcohol (Ethanol)64-17-510001900
Ethylamine75-04-71018
Ethyl amyl ketone (5-Methyl-3-heptanone)541-85-525130
Ethyl benzene100-41-4100435
Ethyl bromide74-96-4200890
Ethyl butylketone (3-Heptanone)106-35-450230
Ethyl chloride75-00-310002600
Ethyl ether60-29-74001200
Ethyl formate109-94-4100300
Ethyl mercaptan75-08-10.51
Ethyl silicate78-10-4100850
Ethylene74-85-1E
Ethylene chlorohydrin107-07-3516X
Ethylenediamine107-15-31025
Ethylene dibromide106-93-4(C)25(C)190X
Ethylene dichloride (1, 2-Dichloroethane)107-06-250200
Ethylene glycol dinitrate628-96-6(C)0.2(C)1X
Ethylene glycol methyl acetate; see Methyl cellosolve acetate
Ethyleneimine; see 1926.1112151-56-4
Ethylene oxide; see 1926.114775-21-8
Ethylidene chloride; see 1, 1-Dichlorethane
N-Ethylmorpholine100-74-32094X
Ferbam14484-64-1
Total dust 15
Ferrovanadium dust12604-58-9 1
Fibrous Glass
Total dust
Respirable fraction
Fluorides (as F)Varies with compound 2.5
Fluorine7782-41-40.10.2
Fluorotrichloromethane (Trichlorofluoromethane)75-69-410005600
Formaldehyde; see 1926.114850-00-0
Formic acid64-18-659
Furfural98-01-1520X
Furfuryl alcohol98-00-050200
Gasoline8006-61-9 A(3)
Glycerin (mist)56-81-5
Total dust
Respirable fraction
Glycidol556-52-550150
Glycol monoethyl ether; see 2-Ethoxyethanol
Graphite, natural
respirable dust7782-42-5222
Graphite, synthetic
Total dust
Respirable fraction
Guthion; see Azinphos methyl
Gypsum13397-24-5
Total dust
Respirable fraction
Hafnium7440-58-6 0.5
Helium7440-59-7E
Heptachlor76-44-8 0.5X
Heptane (n-Heptane)142-82-55002000
Hexachloroethane67-72-1110X
Hexachloronaphthalene1335-87-1 0.2X
n-Hexane110-54-35001800
2-Hexanone (Methyl n-butyl ketone)591-78-6100410
Hexone (Methylisobutyl ketone)108-10-1100410
sec-Hexyl acetate108-84-950300
Hydrazine302-01-211.3X
Hydrogen1333-74-0E
Hydrogen bromide10035-10-6310
Hydrogen chloride7647-01-0(C)5(C)7
Hydrogen cyanide74-90-81011X
Hydrogen fluoride (as F)7664-39-332
Hydrogen peroxide7722-84-111.4
Hydrogen selenide (as Se)7783-07-50.050.2
Hydrogen sulfide7783-06-41015
Hydroquinone123-31-9 2
Indene95-13-61045
Indium and compounds (as in)7440-74-6 0.1
Iodine7553-56-2(C)0.1(C)1
Iron oxide fume1309-37-1 10
Iron salts (soluble) (as Fe)Varies with compound 1
Isomyl acetate123-92-2100525
Isomyl alcohol (primary and secondary)123-51-3100360
Isobutyl acetate110-19-0150700
Isobutyl alcohol78-83-1100300
Isophorone78-59-125140
Isopropyl acetate108-21-4250950
Isopropyl alcohol67-63-0400980
Isopropylamine75-31-0512
Isopropyl ether108-20-35002100
Isopropyl glycidyl ether(IGE)4016-14-250240
Kaolin1332-58-7
Total dust
Respirable fraction
Ketene463-51-40.50.9
Lead inorganic (as Pb); see 1926.627439-92-1
Limestone1317-65-3
Total dust
Respirable fraction
Lindane58-89-9 0.5X
Lithium hydride7580-67-8 0.025
L.P.G. (Liquified petroleum gas)68476-85-710001800
Magnesite546-93-0
Total dust
Respirable fraction
Magnesium oxide fume1309-48-4
Total Particulate 15
Malathion121-75-5
Total dust 15X
Maleic anhydride108-31-60.25
Manganese compounds (as Mn)7439-96-5 (C)5
Manganese fume (as Mn)7439-96-5 (C)5
Marble1317-65-3
Total dust
Respirable fraction
Mercury (aryl and inorganic) (as Hg)7439-97-6 0.1X
Mercury (organo) alkyl compounds (as Hg)7439-97-6 0.01X
Mercury (vapor) (as Hg)7439-97-6 0.1X
Mesityl oxide141-79-725100
Methane74-82-8E
Methanethiol; see Methyl mercaptan
Methoxychlor72-43-5
Total dust 15
2-Methoxyethanol; (Methyl cellosolve)109-86-42580X
2-Methoxyethyl acetate (Methyl cellosolve acetate)110-49-625120X
Methyl acetate79-20-9200610
Methyl acetylene (Propyne)74-99-710001650
Methyl acetylene propadiene mixture (MAPP) 10001800
Methyl acrylate96-33-31035X
Methylal (Dimethoxy-methane)109-87-510003100
Methyl alcohol67-56-1200260
Methylamine74-89-51012
Methyl amyl alcohol; see Methyl Isobutyl carbinol
Methyl n-amyl ketone110-43-0100465
Methyl bromide74-83-9(C)20(C)80X
Methyl butyl ketone; see 2-Hexanone
Methyl cellosolve; see 2-Methoxyethanol
Methyl cellosolve acetate; see 2-Methoxyethyl acetate
Methyl chloride74-87-3100210
Methyl chloroform (1, 1, 1-Trichloroethane)71-55-63501900
Methylcyclohexane108-87-25002000
Methylcyclohexanol25639-42-3100470
o-Methylcyclohexanone583-60-8100460X
*Methylenechloride; see 1910.1052
Methyl ethyl ketone (MEK); see 2-Butanone
Methyl formate107-31-3100250
Methyl hydrazine (Monomethyl hydrazine)60-34-4(C)0.2(C)0.35X
Methyl iodide74-88-4528X
Methyl isoamyl ketone110-12-3100475
Methyl isobutyl carbinol108-11-225100X
Methyl isobutyl ketone; see Hexone
Methyl isocyanate624-83-90.020.05X
Methyl mercaptan74-93-10.51
Methyl methacrylate80-62-6100410
Methyl propylketone; see 2-Pentanone
Methyl silicate681-84-5(C)5(C)30
alpha-Methyl styrene98-83-9(C)100(C)480
Methylene bisphenyl isocyanate (MDI)101-68-8(C)0.02(C)0.2
Methyl enedianiline (MDA)101-77-9
Mica; see Silicates
Molybdenum (as Mo)7439-98-7
Soluble compounds 5
Insoluble Compounds
Total dust 15
Monomethyl aniline100-61-829X
Monomethyl hydrazine; see Methyl hydrazine
Morpholine110-91-82070X
Naphtha (Coal tar)8030-30-6100400
Naphthalene91-20-31050
alpha-Naphthylamine; see 1926.1104134-32-7
beta-Naphthylamine; see 1926.110991-59-8
Neon7440-01-9E
Nickel carbonyl (as Ni)13463-39-30.0010.007
Nickel, metal and insoluble compounds (as Ni)7440-02-0 1
Nickel, soluble compounds (as Ni)7440-02-0 1
Nicotine54-11-5 0.5X
Nitric acid7697-37-225
Nitric oxide10102-43-92530
p-Nitroaniline100-01-616X
Nitrobenzene98-95-315X
p-Nitrochlorobenzene100-00-5 1X
4-Nitrodiphenyl; see 1926.110392-93-3
Nitroethane79-24-3100310
Nitrogen7727-37-9E
Nitrogen dioxide10102-44-0(C)5(C)9
Nitrogen trifluoride7783-54-21029
Nitroglycerin55-63-0(C)0.2(C)2X
Nitromethane75-52-5100250
1-Nitropropane108-03-22590
2-Nitropropane79-46-92590
N-Nitrosodimethylamine; see 1926.111662-79-9
Nitrotoluene (all isomers) 530X
o-isomer88-72-2
m-isomer99-08-1
p-isomer99-99-0
Nitrotrichloromethane; see Chloropicrin
Nitrous oxide10024-97-2E
Octachloronaphthalene2234-13-1 0.1X
Octane111-65-94001900
Oil mist, mineral8012-95-1 5
Osmium tetroxide (as Os)20816-12-0 0.002
Oxalic acid144-62-7 1
Oxygen difluoride7783-41-70.050.1
Ozone10028-15-60.10.2
Paraquat, respirable dust4685-14-7
1910-42-5
2074-50-2
0.5X
Parathion56-38-2 0.1X
Particulates not other wise regulated
Total dust organic and inorganic 15
PCB; see Chlorodiphenyl (42% and 54% chlorine)
Pentaborane19624-22-70.0050.01
Pentachloronaphthalene1321-64-8 0.5X
Pentachlorophenol87-86-5 0.5X
Pentaerythritol115-77-5
Total dust
Respirable fraction
Pentane109-66-05001500
2-Pentanone (Methyl propyl ketone)107-87-9200700
Perchloroethylene (Tetrachloroethylene)127-18-4100670
Perchloromethyl mercaptan594-42-30.10.8
Perchloryl fluoride7616-94-6313.5
Petroleum distillates (Naphtha) (Rubber Solvent) A(3)
Phenol108-95-2519X
p-Phenylene diamine106-50-3 0.1X
Phenyl ether, vapor101-84-817
Phenyl ether-biphenyl mixture, vapor 17
Phenylethylene; see Styrene
Phenyl glycidyl ether (PGE)122-60-11060
Phenylhydrazine100-63-0522X
Phosdrin (Mevinphos)7786-34-7 0.1X
Phosgene (Carbonyl chloride)75-44-50.10.4
Phosphine7803-51-20.30.4
Phosphoric acid7664-38-2 1
Phosphorus (yellow)7723-14-0 0.1
Phosphorus pentachloride10026-13-8 1
Phosphorus pentasulfide1314-80-3 1
Phosphorus trichloride7719-12-20.53
Phthalic anhydride85-44-9212
Picric acid88-89-1 0.1X
Pindone (2-Pivalyl-1, 3-indandione)83-26-1 0.1
Plaster of paris26499-65-0
Total dust
Respirable fraction
Platinum (as Pt)7440-06-4
Metal
Soluble Salts 0.002
Polytetrafluoroethylene
decomposition products A(2)
Portland cement65997-15-1
Total dust 15
Respirable fraction 5
Propane74-98-6E
Propargyl alcohol107-19-71 X
beta-Propriolactone; see 1926.111357-57-8
n-Propyl acetate109-60-4200840
n-Propyl alcohol71-23-8200500
n-Propyl nitrate627-13-425110
Propylene dichloride78-87-575350
Propylene imine75-55-825X
Propylene oxide75-56-9100240
Propyne; see Methyl acetylene
Pyrethrum8003-34-7 5
Pyridine110-86-1515
Quinone106-51-40.10.4
RDX: see Cyclonite
Rhodium (as Rh), metal fume and insoluble compounds7440-16-6 0.1
Rhodium (as Rh), solublec ompounds7440-16-6 0.001
Ronnel299-84-3 10
Rotenone83-79-4 5
Rouge
Total dust
Respirable fraction
Selenium compounds (as Se)7782-49-2 0.2
Selenium hexafluoride (as Se)7783-79-10.050.4
Silica, amorphous, precipitated and gel112926-00-8222
Silica, amorphous, diatomaceous earth, containing less than 1 percent crystalline silica61790-53-2222
Silica, crystalline cristobalite, respirable dust14464-46-1222
Silica, crystalline quartz, respirable dust14808-60-7222
Silica, crystalline tripoli (as quartz), respirable dust1317-95-9222
Silica, crystalline tridymite, respirable dust15468-32-3222
Silica, fused, respirable dust60676-86-0222
Silicates (less than 1 percent crystalline silica) Mica (respirable dust)12001-26-2222
Soapstone, Total dust 222
Soapstone, respirable dust 222
Talc (containing asbestos); use asbesto limit; see 1926.58
Talc (containing no asbestos), respirable dust14807-96-6222
Tremolite, abestiform; see 1926.58
Silicon carbide409-21-2
Total dust
Respirable fraction
Silver, metal and soluble compounds (as Ag)7440-22-4 0.01
Soapstone; see Silicates
Sodium fluoroacetate62-74-8 0.05X
Sodium hydroxide1310-73-2 2
Starch9005-25-8
Total dust
Respirable fraction
Stibine7803-52-30.10.5
Stoddard solvent8052-41-32001150
Strychnine57-24-9 0.15
Styrene100-42-5(C)100(C)420
Sucrose57-50-1
Total dust
Respirable fraction
Sulfur dioxide7446-09-5513
Sulfur hexafluoride2551-62-410006000
Sulfuric acid7664-93-9 1
Sulfur monochloride10025-67-916
Sulfur pentafluoride5714-22-70.0250.25
Sulfuryl fluoride2699-79-8520
Systox; see Demeton
2, 4, 5-T (2, 4, 5-tri-chlorophenoxyacetic acid)93-76-5 10
Talc; see Silicates
Tantalum, metal and oxide dust7440-25-7 5
TEDP (Sulfotep)3689-24-5 0.2X
Teflon decomposition products A2
Tellurium and compounds (as Te)13494-80-9 0.1
Tellurium hexafluoride (as Te)7783-80-40.020.2
Temephos3383-96-8
Total dust
Respirable fraction
TEPP (Tetraethyl pyrophosphaate)107-49-3 0.05X
Terphenylis26140-60-3(C)1(C)9
1, 1, 1, 2-Tetrachloro-2, 2-difluoroethane76-11-95004170
1, 1, 2, 2-Tetrachloro-1, 2-difluoroethane76-12-05004170
1, 1, 2, 2-Tetrachloroethane79-34-5535X
Tetrachoroethylene; see Perchloroethylene
Tetrachloromethane; see Carbon tetrachloride
Tetrachloronaphthalene1335-88-2 2X
Tetraethyl lead (as Pb)78-00-2 0.1X
Tetrahydrofuran109-99-9200590
Tetramethyl lead, (as Pb)75-74-1 0.15X
Tetramethyl succinonitrile3333-52-60.53X
Tetranitromethane509-14-818
Tetryl (2, 4, 6-Trinitrophenylmethyl-nitramine)479-45-8 1.5X
Thallium, soluble compounds (as Tl)7440-28-0 0.1X
Thiram137-26-8 5
Tin, inorganic compounds (except oxides) (as Sn)7440-31-5 2
Tin, organic compounds (as Sn)7440-31-5 0.1
Tin oxide (as Sn)21651-19-4
Total dust
Respirable fraction
Titanium dioxide13463-67-7
Total dust
Toluene108-88-3200750
Toluene-2, 4-diisocyanate (TDI)584-84-9(C)0.02(C)0.14
o-Toluidine95-53-4522X
Toxaphene; see Chlorinated camphene
Tremolite; see Silicates
Tributyl phosphate126-73-8 5
1, 1, 1-Trichloroethane; see Methyl chloroform
1, 1, 2-Trichloroethane79-00-51045X
Trichloroethylene79-01-6100535
Trichloromethane; see Chloroform
Trichloronaphthalene1321-65-9 5X
1, 2, 3-Trichloropropane96-18-450300
1, 1, 2-Trichloro-1, 2, 2-trifluoroethane76-13-110007600
Triethylamine121-44-825100
Trifluorobromomethane75-63-810006100
Trimethyl benzene25551-13-725120
2, 4 6-Trinitrophenyl; see Picric acid
2, 4, 6-Trinitrophenylmethyl nitramine; see Tetryl
2, 4, 6-Trinitrotoluene (TNT)118-96-7 1.5X
Triorthocresyl phosphate78-30-8 0.1
Triphenyl phosphate115-86-6 3
Tungsten (as W)7440-33-7
Insoluble compounds 5
Soluble compounds 1
Turpentine8006-64-2100560
Uranium (as U)7440-61-1
Soluble compounds 0.2
Insoluble compounds 0.2
Vanadium1314-62-1
Respirable dust (as V2O5) (C)0.5
Fume (as V2O5) (C)0.1
Vegetable oil mist
Total dust
Respirable fraction
Vinyl benzene; see Styrene
Vinyl chloride; see 1926.111775-01-4
Vinyl cyanide; see Acrylonitrile
Vinyl toluene25013-15-4100480
Warfarin81-81-2 0.1
Xylenes (o-, m-, p-isomers)1330-20-7100435
Xylidine1300-73-8525X
Yttrium7440-65-5 1
Zinc chloride fume7646-85-7 1
Zinc oxide fume1314-13-2 5
Zinc oxide1314-13-2
Total dust 15
Respirable fraction 5
Zirconium compounds (as Zr)7440-67-7 5



MINERAL DUSTS
Substance
mppcfj
SILICA:

Crystalline Quartz. Threshold limit calculated from the formula

Cristobalite. Amorphous, including natural diatomaceous earth

SILICATES (less than 1 percent crystalline silica)
Mica
Portland cement
Soapstone
Talc (non-asbestiform)
Talc (fibrous), use asbestos limit
Graphite (natural)

250k
----------
%SiO2 + 5

20

20
50
20
20
-
15
Inert or Nuisance Particulatesm: "[*Inert or Nuisance Dusts includes all mineral, inorganic, and organic dusts as indicated by examples by examples in TLV's Appendix D]"50 (or 15 mg/m3 whichever is the smaller) of total dust less than 1% SiO2
Conversion factors. mppcf X 35.3 = million particles per cubic meter = particles per c.c.

CFR# 1926.56 - Illumination.

(a) General. Construction areas, ramps, runways, corridors, offices, shops, and storage areas shall be lighted to not less than the minimum illumination intensities listed in Table D-3 while any work is in progress:

(b) Other areas. For areas or operations not covered above, refer to the American National Standard A11.1-1965, R1970, Practice for Industrial Lighting, for recommended values of illumination.

CFR# 1926.57 - Ventilation.

(a) General. Whenever hazardous substances such as dusts, fumes, mists, vapors, or gases exist or are produced in the course of construction work, their concentrations shall not exceed the limits specified in 1926.55(a). When ventilation is used as an engineering control method, the system shall be installed and operated according to the requirements of this section.

CFR# 1926.59 - Hazard communication.

Note: The requirements applicable to construction work under this section are identical to those set forth at 29 CFR 1910.1200 (General Industry Standards).

CFR# 1926.62 - Lead.

Note: The requirement applicable to residential construction activities involving exposure to lead are found in the full text of the stantard, 29 CFR 1926.62 (Lead).

TABLE D-3
Minimum Illumination Intensities in Foot-candles
Foot-
Candles
Area of Operation
5General construction area lighting.
3General construction areas, concrete placement, excavation and waste areas, access ways, active storage areas, loading platforms, refueling, and field maintenance areas.
5Indoors: warehouses, corridors, hallways, and exitways.
5Tunnels, shafts, and general underground work areas: (Exception: minimum of 10 foot-candles is required at tunnel and shaft heading during drilling, mucking, and scaling. Bureau of Mines approved cap lights shall be acceptable for use in the tunnel heading)
10General construction plant and shops (e.g., batch plants, screening plants, mechanical and electrical equipment rooms, carpenter shops, rigging lofts and active store rooms, mess halls, and indoor toilets and workrooms.)
30First aid stations, infirmaries, and offices.

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