OSHA Health & Safety Construction-related Regulations - D - 50 to 95

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Subpart D - Occupational
Health and Environmental
Controls

1926.50 - Medical services and first aid.

(a) The employer shall insure the availability of medical personnel for advice and consultation on matters of occupational health.

(b) Provisions shall be made prior to commencement of the project for prompt medical attention in case of serious injury.

(c) In the absence of an infirmary, clinic, hospital, or physician, that is reasonably accessible in terms of time and distance to the worksite, which is available for the treatment of injured employees, a person who has a valid certificate in first-aid training from the U.S. Bureau of Mines, the American Red Cross, or equivalent training that can be verified by documentary evidence, shall be available at the worksite to render first aid.

(d)(1) First-aid supplies approved by the consulting physician shall be easily accessible when required.

(d)(2) The first-aid kit shall consist of materials approved by the consulting physician in a weatherproof container with individual sealed packages for each type of item. The contents of the first-aid kit shall be checked by the employer before being sent out on each job and at least weekly on each job to ensure that the expended items are replaced.

(e) Proper equipment for prompt transportation of the injured person to a physician or hospital, or a communication system for contacting necessary ambulance service, shall be provided.

(f) The telephone numbers of the physicians, hospitals, or ambulances shall be conspicuously posted.

(g) Where the eyes or body of any person may be exposed to injurious corrosive materials, suitable facilities for quick drenching or flushing of the eyes and body shall be provided within the work area for immediate emergency use.

1926.51 - Sanitation.

(a) Potable water.

(a)(1) An adequate supply of potable water shall be provided in all places of employment.

(a)(2) Portable containers used to dispense drinking water shall be capable of being tightly closed, and equipped with a tap. Water shall not be dipped from containers.

(a)(3) Any container used to distribute drinking water shall be clearly marked as to the nature of its contents and not used for any other purpose.

(a)(4) The common drinking cup is prohibited.

(a)(5) Where single service cups (to be used but once) are supplied, both a sanitary container for the unused cups and a receptacle for disposing of the used cups shall be provided.

(a)(6) Potable water means water which meets the quality standards prescribed in the U.S. Public Health Service Drinking Water Standards, published in 42 CFR part 72, or water which is approved for drinking purposes by the State or local authority having jurisdiction.

(b) Nonpotable water.

(b)(1) Outlets for nonpotable water, such as water for industrial or firefighting purposes only, shall be identified by signs meeting the requirements of Subpart G of this part, to indicate clearly that the water is unsafe and is not to be used for drinking, washing, or cooking purposes.

(b)(2) There shall be no cross-connection, open or potential, between a system furnishing potable water and a system furnishing nonpotable water.

(c) Toilets at construction jobsites.

(c)(1) Toilets shall be provided for employees according to the following table:

TABLE D-1
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.

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.

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.

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.

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.      

 

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.

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.

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).

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.

Last updated on 01/21/05

 

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