New York Codes, Rules and Regulations › Title 12 - DEPARTMENT OF LABOR › Chapter I - Industrial Board Of Appeals › Subchapter A - The Industrial Code › Part 12 - Control Of Air Contaminants › Subpart 12-3 - Evidence Of Dangerous Air Contaminants › Section 12-3.1 - General

Current through Register Vol. 46, No. 28, July 10, 2024
The existence of air contaminants consisting of or
						deriving from the substances named in the following tables in relative
						quantities greater than those set forth as to each substance shall constitute
						prima facie evidence that such contaminants are dangerous air contaminants,
						except when they exist only momentarily and infrequently. Prima facie evidence
						as to whether such contaminants in momentary and infrequent occurrences, or
						other air contaminants not named in the tables or lesser concentrations than
						those set forth in the following tables constitute dangerous air contaminants
						by reason of their existence in quantities tending to injure the health of
						employees shall include an opinion to that effect by a physician representing
						the industrial commissioner.
Note:
Petitions for variations pursuant to section 30  of the
						Labor Law from administrative orders issued on the basis of prima facie
						evidence of dangerous air contaminants will be decided by the board after
						review of reports of air tests and field investigations submitted to the board
						by the commissioner and a hearing which the petitioner will attend. The
						petitioner will be given opportunity to submit testimony, data and test results
						at the hearing to support his variation request.
TABLE I-Threshold Limit Values
						(T.L.V.)
(in alphabetical order)
Substance
ppm(a)
mg/M3(b)
Abate*........................................................................................................................................................................
-
15
Acetaldehyde............................................................................................................................................................
200
360
Acetic
								  acid................................................................................................................................................................
10
25
Acetic
								  anhydride.......................................................................................................................................................
5
20
Acetone.....................................................................................................................................................................
1,000
2,400
Acetonitrile................................................................................................................................................................
40
70
Acetylene dichloride, see 1,2
								  Dicloroethylene.......................................................................................................
Acetylene
								  tetrabromide.............................................................................................................................................................
1
14
Acrolein.....................................................................................................................................................................
0.1
0.25
Acrylamide-skin........................................................................................................................................................
-
0.3
Acrylonitrile-skin.......................................................................................................................................................
20
45
Aldrin-skin.................................................................................................................................................................
-
0.25
Allyl
								  alcohol-skin.........................................................................................................................................................
2
5
Allyl
								  chloride................................................................................................................................................................
1
3
C
Allyl glycidyl ether
								  (AGE)...................................................................................................................................................................................
10
45
Allyl propyl
								  disulfide.....................................................................................................................................................................
2
12
2-Aminoethanol, see
								  Ethanolamine............................................................................................................................................................
2-Aminopyridine........................................................................................................................................................
0.5
2
Ammonia...................................................................................................................................................................
50
35
Ammonium sulfamate
								  (Ammate).............................................................................................................................
-
15
n-Amyl
								  acetate...........................................................................................................................................................
100
525
sec-Amyl
								  acetate........................................................................................................................................................................
125
650
Aniline-skin.................................................................................................................................................................
5
19
Anisidine
								  (o,p-isomers)-skin.............................................................................................................................................................................
-
0.5
Antimony & compounds (as
								  Sb)....................................................................................................................................................................................
-
0.5
ANTU (alpha naphthyl
								  thiourea)....................................................................................................................................................................................
-
0.3
Arsenic & compounds (as
								  As)....................................................................................................................................................................................
-
0.5
Arsine..........................................................................................................................................................................
0.05
0.2
Azinphos-methyl-skin.................................................................................................................................................
-
0.2
Barium (soluble
								  compounds).....................................................................................................................................................................................
-
0.5
C
Benzene
								  (benzol)-skin.............................................................................................................................................................................
25
80
Benzidine-skin............................................................................................................................................................
-
A
p-Benzoquinone, see
								  Quinone......................................................................................................................................................................
Benzoyl
								  peroxide......................................................................................................................................................................
-
5
Benzyl
								  chloride.......................................................................................................................................................................
1
5
Beryllium....................................................................................................................................................................
-
0.002
Biphenyl, see
								  Diphenyl......................................................................................................................................................................
Boron
								  oxide............................................................................................................................................................................
-
15
Boron
								  tribromide*.......................................................................................................................................................
1
-
C
Boron
								  trifluoride.........................................................................................................................................................
1
3
Bromine......................................................................................................................................................................
0.1
0.7
Bromine
								  pentafluoride*.............................................................................................................................................................
0.1
-
Bromoform-skin.........................................................................................................................................................
0.5
5
Butadiene (1,
								  3-butadiene).....................................................................................................................................................................................
1,000
2,200
Butanethiol, see Butyl
								  mercaptan..............................................................................................................................
2-Butanone..................................................................................................................................................................
200
590
2-Butoxy ethanol (Butyl
								  Cellosolve)-skin...................................................................................................................
50
240
Butyl acetate (n-butyl
								  acetate)....................................................................................................................................
150
710
sec-Butyl
								  acetate........................................................................................................................................................................
200
950
tert-Butyl
								  acetate........................................................................................................................................................................
200
950
Butyl
								  alcohol...............................................................................................................................................................
100
300
sec-Butyl
								  alcohol........................................................................................................................................................................
150
450
tert-Butyl
								  alcohol........................................................................................................................................................................
100
300
C
Butylamine-skin..........................................................................................................................................................
5
15
C
tert-Butyl chromate (as CrO
								  3
								)-skin..........................................................................................................................
-
0.1
n-Butyl glycidyl ether
								  (BGE).......................................................................................................................................
50
270
Butyl
								  mercaptan..........................................................................................................................................................
10
35
p-tert-Butyltoluene......................................................................................................................................................
10
60
Cadmium (Metal dust and soluble
								  salts)...................................................................................................................
-
0.2
Cadmium oxide
								  fume.........................................................................................................................................................................
-
0.1
Calcium
								  arsenate....................................................................................................................................................
-
1
Calcium
								  oxide.........................................................................................................................................................
-
5
Camphor*..............................................................................................................................................................
2
-
Carbaryl
								  (Sevin**)................................................................................................................................................................................
-
5
Carbon
								  black.........................................................................................................................................................
-
3.5
Carbon
								  dioxide......................................................................................................................................................
5,000
9,000
Carbon
								  disulfide-skin.........................................................................................................................................................
20
60
Carbon
								  monoxide................................................................................................................................................
50
55
Carbon
								  tetrachloride-skin...................................................................................................................................
10
65
Chlordane-skin...................................................................................................................................................
-
0.5
Chlorinated
								  camphene-skin..................................................................................................................................................
-
0.5
Chlorinated diphenyl
								  oxide...................................................................................................................................................................
-
0.5
Chlorine*.............................................................................................................................................................
1
-
Chlorine
								  dioxide.................................................................................................................................................
0.1
0.3
C
Chlorine
								  trifluoride............................................................................................................................................
0.1
0.4
C
Chloroacetaldehyde........................................................................................................................................
1
3
alpha-Chloroacetophenone
								  (phenacylchloride)............................................................................................
0.05
0.3
Chlorobenzene
								  (monochlorobenzene)..........................................................................................................
75
350
o-Chlorobenzylidene malononitrile
								  (OCBM)....................................................................................................
0.05
0.4
Chlorobromomethane.......................................................................................................................................
200
1,050
2-Chloro-1, 3 butadiene, see
								  Chloroprene.....................................................................................................
Chlorodiphenyl (42%
								  Chlorine)-skin................................................................................................................
-
1
Chlorodiphenyl (54%
								  Chlorine)-skin................................................................................................................
-
0.5
1, Chloro, 2, 3, epoxypropane, see
								  Epichlorhydrin......................................................................................
2, Chloroethanol, see Ethylene
								  chlorohydrin..................................................................................................
Chloroethylene, see Vinyl
								  chloride..................................................................................................................
C
Chloroform
								  (trichloromethane).........................................................................................................................
50
240
1-Chloro-1-nitropropane...................................................................................................................................
20
100
Chloropicrin.......................................................................................................................................................
0.1
0.7
Chloroprene (2-chloro-1,
								  3-butadiene)-skin...................................................................................................................................................................
25
90
Chromic acid and chromates (as CrO
								  3
								)......................................................................................................
-
0.1
Chromium, sol. chromic, chromous salts (as
								  Cr)..........................................................................................
-
0.5
Metal and insoluble
								  salts................................................................................................................................
-
1
Coal tar pitch volatiles (benzene soluble
								  fraction, anthracene, BaP, phenanthrene, acridine, chrysene,
								  pyrene)..........................................................................................................................................................................
-
0.2
Cobalt, metal fume and
								  dust...........................................................................................................................
-
0.1
Copper
								  fume....................................................................................................................................................
-
0.1
Dusts and
								  mists................................................................................................................................................
-
1
Cotton dust
								  (raw).............................................................................................................................................
-
1
Crag**
								  herbicide..............................................................................................................................................
-
15
Cresol (all
								  isomers)-skin.................................................................................................................................
5
22
Crotonaldehyde...............................................................................................................................................
2
6
Cumene-skin..................................................................................................................................................
50
245
Cyanide (as
								  CN)-skin.................................................................................................................................................................
-
5
Cyanogen*.......................................................................................................................................................
10
-
Cyclohexane....................................................................................................................................................
300
1,050
Cyclohexanol..................................................................................................................................................
50
200
Cyclohexanone...............................................................................................................................................
50
200
Cyclohexene...................................................................................................................................................
300
1,015
Cyclopentadiene.............................................................................................................................................
75
200
2,
								  4-D...............................................................................................................................................................
-
10
DDT-skin.........................................................................................................................................................
-
1
DDVP-skin........................................................................................................................................................
-
1
Decaborane-skin.............................................................................................................................................
0.05
0.3
Demeton**-skin...............................................................................................................................................
-
0.1
Diacetone alcohol
								  (4-methyl-2-pentanone)...................................................................................................
50
240
1, 2 Diaminoethane, see
								  Ethyllenediamine...................................................................................................
Diazomethane..................................................................................................................................................
0.2
0.4
Diborane...........................................................................................................................................................
0.1
0.1
C
1, 2-Dibromoethane (ethylene dibromide)-
								  skin.............................................................................................
25
190
Dibutyl
								  phosphate...............................................................................................................................................
1
5
Dibutylphthalate.................................................................................................................................................
-
5
C
o-Dichlorobenzene...........................................................................................................................................
50
300
p-Dichlorobenzene............................................................................................................................................
75
450
Dichlorodifluoromethane...................................................................................................................................
1,000
4,950
1, 3-Dichloro-5, dimethyl
								  hydantoin..............................................................................................................................................................
-
0.2
1,
								  1-Dichloroethane.............................................................................................................................................
100
400
1,
								  2-Dichloroethane............................................................................................................................................
50
200
1,
								  2-Dichloroethylene.........................................................................................................................................
200
790
C
Dichloroethyl
								  ether-skin............................................................................................................................................................
15
90
Dichloromethane, see
								  Methylenechloride..........................................................................................................
Dichloromonofluoromethane..............................................................................................................................
1,000
4,200
C
1,
								  1-Dichloro-1-nitroethane.................................................................................................................................
10
60
1, 2-Dichloropropane, see
								  Propylenedichloride.................................................................................................
Dichlorotetrafluoroethane.....................................................................................................................................
1,000
7,000
Dieldrin-skin.........................................................................................................................................................
-
0.25
Diethylamine..........................................................................................................................................................
25
75
Diethylamino
								  ethanol-skin....................................................................................................................................
10
50
C
Diethylene
								  triamine-skin......................................................................................................................................
10
-
Diethylether, see Ethyl
								  ether................................................................................................................................
Difluorodibromomethane......................................................................................................................................
100
860
C
Diglycidyl ether
								  (DGE)..........................................................................................................................................
5.5
2.8
Dihydroxybenzene, see
								  Hydroquinone...............................................................................................................
Diisobutyl
								  ketone...................................................................................................................................................
50
290
Diisopropylamine-skin..........................................................................................................................................
5
20
Diphenyl
								  amine*....................................................................................................................................................
-
10
Dimethoxymethane, see
								  Methylal.........................................................................................................................
Dimethyl
								  acetamide-skin.......................................................................................................................................................
10
35
Dimethylamine.......................................................................................................................................................
10
18
Dimethylaminobenzene, see
								  Xylidene.................................................................................................................
Dimethylaniline
								  (N-dimethylaniline)-skin................................................................................................................
5
25
Dimethylbenzene, see
								  Xylene.............................................................................................................................
Dimethyl, 1, 2-dibromo-2, 2-dichloroethyl,
								  (Dibrom)............................................................................................
-
3
Dimethylformamide-skin........................................................................................................................................
10
30
2, 6 Dimethylheptanone, see Diisobutyl
								  ketone...................................................................................................
1,
								  1-Dimethylhydrazine-skin..................................................................................................................................
0.5
1
Dimethylphthalate..................................................................................................................................................
-
5
Dimethylsulfate-skin..............................................................................................................................................
1
5
Dinitrobenzene (all
								  isomers)-skin.........................................................................................................................
-
1
Dinitro-o-cresol-skin.............................................................................................................................................
-
0.2
Dinitrotoluene-skin................................................................................................................................................
-
1.5
Dioxane (Diethylene
								  dioxide)-skin........................................................................................................................
100
360
Diphenyl.................................................................................................................................................................
0.2
1
Diphenyl
								  Amine*.....................................................................................................................................................
-
10
Diphenylmethane diisocyanate (see Methylene
								  bisphenyl isocyanate)
								  (MDI)...................................................
Dipropylene glycol methyl
								  ether-skin.....................................................................................................................
100
600
Di-sec, octyl phthalate
								  (Di-2-ethylhexylphthalate).................................................................................................
-
5
Endrin-skin.............................................................................................................................................................
-
0.1
Epichlorhydrin-skin.................................................................................................................................................
5
19
EPN-skin.................................................................................................................................................................
-
0.5
1, 2-Epoxypropane, see
								  Propyleneoxide......................................................................................................................................................
2, 3-Epoxy-1-propanol, see
								  Glycidol....................................................................................................................................................................
Ethanethiol, see
								  Ethylmercaptan........................................................................................................................................................
Ethanolamine............................................................................................................................................................
3
6
2
								  Ethoxyethanol-skin................................................................................................................................................
200
740
2 Ethoxyethylacetate (Cellosolve
								  acetate)-skin......................................................................................................
100
540
Ethyl
								  acetate.............................................................................................................................................................
400
1,400
Ethyl
								  acrylate-skin......................................................................................................................................................
25
100
Ethyl alcohol
								  (ethanol)...............................................................................................................................................
1,000
1,900
Ethylamine..................................................................................................................................................................
10
18
Ethyl sec-amyl ketone
								  (5-methyl-3-heptanone)...................................................................................................................................................................................
25
130
Ethyl
								  benzene....................................................................................................................................................................
100
435
Ethyl
								  bromide...........................................................................................................................................................................
200
890
Ethyl butyl ketone
								  (3-Heptanone).........................................................................................................................................................................................
50
230
Ethyl
								  chloride............................................................................................................................................................................
1,000
2,600
Ethyl
								  ether.................................................................................................................................................................................
400
1,200
Ethyl
								  formate...................................................................................................................................................................
100
300
Ethyl
								  mercaptan..............................................................................................................................................................
10
25
Ethyl
								  silicate...................................................................................................................................................................
100
850
Ethylene
								  chlorohydrin-skin.............................................................................................................................................
5
16
Ethylenediamine...............................................................................................................................................................
10
25
Ethylene dibromide, see 1,
								  2-Dibromoethane..........................................................................................................................................................
Ethylene dichloride, see 1,
								  2-Dichloroethane............................................................................................................................................................
C
Ethylene glycol dinitrate and/or Nitrogylcerin-
								  skin...................................................................................................................................................................................
0.2(d)
1
Ethylene glycol monomethyl ether acetate, see
								  Methyl cellosolve
								  acetate..........................................................
Ethylene
								  imine-skin...................................................................................................................................................
0.5
1
Ethylene
								  oxide...........................................................................................................................................................
50
90
Ethylidine chloride, see 1,
								  1-Dichloroethane....................................................................................................................................................
N-Ethylmorpholine-skin..............................................................................................................................................
20
94
Ferbam............................................................................................................................................................................
-
15
Ferrovanadium
								  dust....................................................................................................................................................
-
1
Fluoride (as
								  F)..............................................................................................................................................................
-
2.5
Fluorine..........................................................................................................................................................................
0.1
0.2
Fluorotrichloromethane...............................................................................................................................................
1,000
5,600
C
Formaldehyde.............................................................................................................................................................
5
6
Formic
								  acid..................................................................................................................................................................
5
9
Furfural-skin.................................................................................................................................................................
5
20
Furfuryl
								  alcohol.........................................................................................................................................................
50
200
Gasoline................................................................................................................................................................
-
A
Gylcidol (2,
								  3-Epoxy-1-propanol)..................................................................................................................................................................................
50
150
Gylcol monoethyl ether, see 2-Ethoxyethanol
Guthion**, see
								  Azinphosmethyl..........................................................................................................................
Hafnium......................................................................................................................................................
-
0.5
Heptachlor-skin..........................................................................................................................................
-
0.5
Heptane
								  (n-heptane).............................................................................................................................
500
2,000
Hexachloroethane-skin......................................................................................................................................
1
10
Hexachloronaphthalene-skin.............................................................................................................................
-
0.2
Hexane
								  (n-hexane)............................................................................................................................................
500
1,800
2-Hexanone........................................................................................................................................................
100
410
Hexone...............................................................................................................................................................
100
410
sec-Hexyl
								  acetate.............................................................................................................................................
50
300
Hydrazine-skin...................................................................................................................................................
1
1.3
Hydrogen
								  bromide.............................................................................................................................................
3
10
C
Hydrogen
								  chloride................................................................................................................................................
5
7
Hydrogen
								  cyanide-skin........................................................................................................................................
10
11
Hydrogen
								  fluoride.................................................................................................................................................
3
2
Hydrogen peroxide,
								  90%....................................................................................................................................
1
1.4
Hydrogen
								  selenide..............................................................................................................................................
0.05
0.2
Hydrogen
								  sulfide..............................................................................................................................................
10
15
Hydroquinone..............................................................................................................................................
-
2
Indium and compounds (as
								  In)*......................................................................................................................
-
0.1
C
Iodine................................................................................................................................................................
0.1
1
Iron oxide
								  fume..................................................................................................................................................
-
10
Iron salts, soluble (as
								  Fe)*...................................................................................................................................
-
1
Isoamyl
								  acetate......................................................................................................................................................
100
525
Isoamyl
								  alcohol......................................................................................................................................................
100
360
Isobutyl
								  acetate......................................................................................................................................................
150
700
Isobutyl
								  alcohol......................................................................................................................................................
100
300
Isophorone..............................................................................................................................................................
25
140
Isopropyl
								  acetate......................................................................................................................................................
250
950
Isopropyl
								  alcohol......................................................................................................................................................
400
980
Isopropylamine......................................................................................................................................................
5
12
Isopropylether......................................................................................................................................................
500
2,100
Isopropyl glycidyl ether
								  (IGE)............................................................................................................................
50
240
Ketone.............................................................................................................................................................
0.5
0.9
Lead...................................................................................................................................................................
-
0.2
Lead
								  arsenate................................................................................................................................................
-
0.15
Lindane-skin....................................................................................................................................................
-
0.5
Lithium
								  hydride...................................................................................................................................................
-
0.025
L.P.G. (Liquified petroleum
								  gas)........................................................................................................................
1,000
1,800
Magnesium oxide
								  fume........................................................................................................................................
-
15
Malathion-skin....................................................................................................................................................
-
15
Maleic
								  anhydride.................................................................................................................................................
0.25
1
C
Manganese...........................................................................................................................................................
-
5
Mercury-skin...........................................................................................................................................................
-
0.1
Mercury (organic
								  compounds)-skin.........................................................................................................................................................................
-
0.01
Mesityl
								  oxide..............................................................................................................................................................
25
100
Methanethiol, see Methyl
								  mercaptan..................................................................................................................................................................
Methoxychlor...............................................................................................................................................................
-
15
2-Methoxyethanol, see Methyl
								  cellosolve................................................................................................................
Methyl
								  acetate..............................................................................................................................................................
200
610
Methyl acetylene
								  (propyne)......................................................................................................................................................................................
1,000
1,650
Methyl acetylene-propadiene mixture
								  (MAPP).....................................................................................................................................................................................
1,000
1,800
Methyl
								  acrylate-skin....................................................................................................................................................
10
35
Methylal
								  (dimethoxymethane)....................................................................................................................................
1,000
3,100
Methyl alcohol
								  (methanol)...........................................................................................................................................
200
260
Methylamine................................................................................................................................................................
10
12
Methyl amyl alcohol, see Methyl isobutyl
								  carbinol..................................................................................................
Methyl (n-amyl) ketone
								  (2-Heptanone).....................................................................................................................
100
465
C
Methyl
								  bromide-skin...................................................................................................................................................
20
80
Methyl butyl ketone, see
								  2-Hexanone..............................................................................................................................................................
Methyl
								  cellosolve-skin..............................................................................................................................................
25
80
Methyl cellosolve
								  acetate-skin.................................................................................................................................................................
25
120
C
Methyl
								  chloride............................................................................................................................................................
100
210
Methyl
								  chloroform.......................................................................................................................................................
350
1,900
Methylcyclohexane....................................................................................................................................................
500
2,000
Methylcyclohexanol..................................................................................................................................................
100
470
o-Methylcyclohexanone-skin.....................................................................................................................................
100
460
Methyl ethyl ketone (MEK), see
								  2-Butanone.................................................................................................................................................................
Methyl
								  formate...........................................................................................................................................................
100
250
Methyl
								  iodide-skin........................................................................................................................................................
5
28
Methyl isobutyl
								  carbinol-skin.................................................................................................................................................................
25
100
Methyl isobutyl ketone, see
								  Hexone.................................................................................................................................................................
Methyl
								  isocyanate-skin......................................................................................................................................................
0.22
0.05
C
Methyl
								  mercaptan..................................................................................................................................................
10
20
Methyl
								  methacrylate.................................................................................................................................................
100
410
Methyl propyl ketone, see
								  2-Pentanone............................................................................................................................................................
C
Methyl
								  silicate*........................................................................................................................................................
5
-
C
alpha-Methyl
								  styrene.................................................................................................................................................................
100
480
C
Methylene bisphenyl isocyanate
								  (MDI)................................................................................................................................................................................
0.02
0.2
Methylene chloride
								  (dichloromethane)....................................................................................................................................................................................
500
1,740
Molybdenum (soluble
								  compounds)..................................................................................................................................................................................
-
5
(insoluble
								  compounds).................................................................................................................................................................................
-
15
Monomethyl
								  aniline-skin............................................................................................................................................................
2
9
C
Monomethyl
								  hydrazine-skin......................................................................................................................................................
0.2
0.35
Morpholine-skin......................................................................................................................................................
20
70
Naphtha (coal
								  tar).................................................................................................................................................
100
400
Naphthalene...........................................................................................................................................................
10
50
beta-Naphthylamine.................................................................................................................................................
-
A
Nickel
								  carbonyl........................................................................................................................................................
0.001
0.007
Nickel, metal and soluble
								  compounds.............................................................................................................................................................
-
1
Nicotine-skin............................................................................................................................................................
-
0.5
Nitric
								  acid.................................................................................................................................................................
2
5
Nitric
								  oxide.................................................................................................................................................................
25
30
p-Nitroaniline-skin......................................................................................................................................................
1
6
Nitrobenzene-skin.........................................................................................................................................................
1
5
p-Nitrochloro-benzene-skin........................................................................................................................................
-
1
Nitroethane.................................................................................................................................................................
100
310
C
Nitrogen
								  dioxide.........................................................................................................................................................
5
9
Nitrogen
								  Trifluoride.................................................................................................................................................................
10
29
C
Nitroglycerin-skin.......................................................................................................................................................
0.2
2
Nitromethane.................................................................................................................................................................
100
250
1-Nitropropane.................................................................................................................................................................
25
90
2-Nitropropane.................................................................................................................................................................
25
90
N-Nitrosodimethyl-amine
								  (Dimethyl-nitrosoamine)-skin................................................................................................
-
A
Nitrotoluene-skin..........................................................................................................................................................
5
30
Nitrotrichloromethane, see
								  Chloropicrin.................................................................................................................................................................
Octachloronaphthalene-skin.....................................................................................................................................
-
0.1
Octane.................................................................................................................................................................
500
2,350
Oil mist
								  (mineral).......................................................................................................................................................
-
5
Osmium
								  tetroxide.......................................................................................................................................................
-
0.002
Oxalic
								  acid.................................................................................................................................................................
-
1
Oxygen
								  difluoride......................................................................................................................................................
0.05
0.1
Ozone.................................................................................................................................................................
0.1
0.2
Paraquat-skin..........................................................................................................................................................
-
0.5
Parathion-skin........................................................................................................................................................
-
0.1
Pentaborane...............................................................................................................................................
0.005
0.01
Pentachloronaphthalene-skin...................................................................................................................
-
0.5
Pentachlorophenol-skin.................................................................................................................................
-
0.5
Pentane.....................................................................................................................................................
1,000
2,950
2-Pentanone.............................................................................................................................................
200
700
Perchloroethylene.....................................................................................................................................
100
670
Perchloromethyl
								  mercaptan...................................................................................................................................................
0.1
0.8
Perchloryl
								  fluoride...................................................................................................................................
3
13.5
Petroleum Distillates
								  (naphtha)................................................................................................................
500
2,000
Phenol-skin.................................................................................................................................................
5
19
p-Phenylene
								  diamine-skin........................................................................................................................
-
0.1
Phenyl ether
								  (vapor).................................................................................................................................
1
7
Phenyl ether-Biphenyl mixture
								  (vapor)...................................................................................................
1
7
Phenylethylene, see
								  Styrene......................................................................................................................................................
Phenyl glycidyl ether
								  (PGE).................................................................................................................................................................
10
60
Phenylhydrazine-skin..................................................................................................................................
5
22
Phosdrln
								  (Mevinphos**)-skin...........................................................................................................................................................
-
0.1
Phosgene (carbonyl
								  chloride).................................................................................................................................................................
0.1
0.4
Phosphine................................................................................................................................................
0.3
0.4
Phosphoric
								  acid........................................................................................................................................
-
1
Phosphorus
								  (yellow)...................................................................................................................................
-
0.1
Phosphorus
								  pentachloride.........................................................................................................................
-
1
Phosphorus
								  pentasulfide..................................................................................................................................................
-
1
Phosphorus
								  trichloride.......................................................................................................................................................
0.5
3
Phthalic
								  anhydride.........................................................................................................................................
2
12
Picric
								  acid-skin..............................................................................................................................................
-
0.1
Pival** (2-Pivalyl-1,
								  3-indandione)......................................................................................................................................................................
-
0.1
Platinum (soluble
								  salts).........................................................................................................................................................................
-
0.002
Polytetrafluoroethylene decomposition
								  products..........................................................................................................................................................
-
A2
Propane...........................................................................................................................................................
1,000
1,800
beta-Propiolactone.........................................................................................................................................
-
A1
Propargyl
								  alcohol-skin*...................................................................................................................................
1
-
n-Propyl
								  acetate...........................................................................................................................................
200
840
Propyl
								  alcohol................................................................................................................................................
200
500
n-Propyl
								  nitrate.............................................................................................................................................
25
110
Propylene
								  dichloride.....................................................................................................................................
75
350
Propylene
								  imine-skin..................................................................................................................................
2
5
Propylene
								  oxide.........................................................................................................................................
100
240
Propyne, see
								  Methylacetylene............................................................................................................................................
Pyrethrum....................................................................................................................................................
-
5
Pyridine.....................................................................................................................................................
5
15
Quinone......................................................................................................................................................
0.1
0.4
RDX-skin*....................................................................................................................................................
-
1.5
Rhodium, Metal fume and
								  dusts.................................................................................................................................................................
-
0.1
Soluble
								  salts.............................................................................................................................................
-
0.001
Ronnel.......................................................................................................................................................
-
15
Rotenone
								  (commercial).................................................................................................................................................................
-
5
Selenium compounds (as
								  Se).................................................................................................................................................................
-
0.2
Selenium
								  hexafluoride..............................................................................................................................
0.05
0.4
Silver, Metal and soluble
								  compounds...................................................................................................................................................
-
0.01
Sodium fluoroacetate
								  (1080)-skin.................................................................................................................................................................
-
0.05
Sodium
								  hydroxide............................................................................................................................................
-
2
Stibine.................................................................................................................................................................
0.1
0.5
Stoddard
								  solvent.............................................................................................................................................
500
2,900
Strychnine..................................................................................................................................................
-
0.15
C
Styrene monomer
								  (phenylethylene).................................................................................................................................................................
100
420
Sulfur
								  dioxide..............................................................................................................................................
5
13
Sulfur
								  hexafluoride........................................................................................................................................
1,000
6,000
Sulfuric
								  acid................................................................................................................................................
-
1
Sulfur
								  monochloride.......................................................................................................................................
1
6
Sulfur
								  pentafluoride......................................................................................................................................
0.025
0.25
Sulfuryl
								  fluoride.............................................................................................................................................
5
20
Systox, see
								  Demeton**.....................................................................................................................................................
2, 4, 5,
								  T..........................................................................................................................................................
-
10
Tantalum......................................................................................................................................................
-
5
TEDP-skin..................................................................................................................................................
-
0.2
Teflon** decomposition
								  products.........................................................................................................................................................
-
A2
Tellurium......................................................................................................................................................
-
0.1
Tellurium
								  hexafluoride..................................................................................................................................
0.02
0.2
TEPP-skin....................................................................................................................................................
-
0.05
C
Terphenyls....................................................................................................................................................
1
9
1, 1, 1, 2-Tetrachloro-2,
								  2-difluoroethane............................................................................................................................................
500
4,170
1, 1, 2, 2-Tetrachloro-1,
								  2-difluoroethane...........................................................................................................................................
500
4,170
1, 1, 2,
								  2-Tetrachloroethane-skin..................................................................................................................
5
35
Tetrachloroethylene, see
								  Perchloroethylene........................................................................................................................................
Tetrachloromethane, see Carbon
								  tetrachloride..........................................................................................
Tetrachloronaphthalene-skin.......................................................................................................................
-
2
Tetraethyl lead (as
								  Pb)-skin..........................................................................................................................
-
0.075
Tetrahydrofuran...........................................................................................................................................
200
590
Tetramethyl lead (TML) (as
								  Pb)-skin...................................................................................................................................................................
-
0.075
Tetramethyl
								  succinonitrile-skin.............................................................................................................................................
0.5
3
Tetranitromethane.............................................................................................................................................
1
8
Tetryl (2, 4,
								  6-trinitrophenylmethylnitramine)-skin............................................................................................
-
1.5
Thallium (soluble
								  compounds)-skin................................................................................................................
-
0.1
Thiram..................................................................................................................................................................
-
5
Tin (inorganic compounds, except SnH
								  4 and SnO 2
								).....................................................................................
-
2
Tin (organic
								  compounds)...................................................................................................................................
-
0.1
Titanium
								  dioxide....................................................................................................................................................
-
15
Toluene
								  (toluol).....................................................................................................................................................
200
750
C
Toluene-2,
								  4-diisocyanate.......................................................................................................................................................
0.02
0.14
o-Toluidine-skin......................................................................................................................................................
5
22
Toxaphene, see Chlorinated
								  camphene..............................................................................................................
Tributyl
								  phosphate...............................................................................................................................................
-
5
1, 1, 1-Trichloroethane, see Methyl
								  chloroform....................................................................................................
1, 1,
								  2-Trichloroethane-skin..................................................................................................................................
10
45
Trichloroethylene....................................................................................................................................................
100
535
Trichloromethane, see
								  Chloroform......................................................................................................................
Trichloronaphthalene-skin......................................................................................................................................
-
5
1, 2,
								  3-Trichloropropane.......................................................................................................................................
50
300
1, 1, 2-Trichloro 1, 2,
								  2-trifluoroethane........................................................................................................................................................
1,000
7,600
Triethylamine............................................................................................................................................................
25
100
Trifluoromonobromomethane.................................................................................................................................
1,000
6,100
2, 4, 6-Trinitrophenol, see Picric
								  acid........................................................................................................................................................................
2, 4, 6-Trinitrophenylmethylnitramine, see
								  Tetryl.................................................................................................
Trinitrotoluene-skin..................................................................................................................................................
-
1.5
Triorthocresyl
								  phosphate........................................................................................................................................
-
0.1
Triphenyl
								  phosphate..................................................................................................................................................................
-
3
Tungsten and compounds, as W
								  soluble*.........................................................................................................................................................................
-
1
Insoluble......................................................................................................................................................................
-
5
Turpentine......................................................................................................................................................................
100
560
Uranium (natural), soluble and insoluble
								  compounds, (as
								  U)*...................................................................................
-
0.2
C
Vanadium (V 2 O 5
								  dust).............................................................................................................................................
-
0.5
(V 2 O 5
								  fume)............................................................................................................................................................
-
0.1
Vinyl benzene, see
								  Styrene.........................................................................................................................................................................
C
Vinyl
								  chloride.................................................................................................................................................................
500
1,300
Vinylcyanide, see
								  Acrylonitrile.................................................................................................................................................................
Vinyl
								  toluene................................................................................................................................................................
100
480
Warfarin........................................................................................................................................................................
-
0.1
Xylene
								  (xylol)...............................................................................................................................................................
100
435
Xylidine-skin...............................................................................................................................................................
5
25
Yttrium...........................................................................................................................................................................
-
1
Zinc chloride
								  fume.........................................................................................................................................................
-
1
Zinc oxide
								  fume...............................................................................................................................................................
-
5
Zirconium compounds (as
								  Zr).........................................................................................................................................
-
5
____
(a) Parts
					 of vapor or gas per million parts of contaminated air by volume at 25 degrees
					 Centigrade and 760 mm. Hg pressure.
(b) Approximate milligrams of particulate per
					 cubic meter of air.
(d) An
					 atmospheric concentration of not more than 0.02 ppm, or personal protection may
					 be necessary to avoid headache.
* 1969 addition.
** Registered trade name.
A No exposure or contact permitted by any route
						(respiratory, oral or skin).
C Ceiling limit which shall not be exceeded even
						momentarily or infrequently.
A1 No exposure or contact
						permitted by any route (respiratory, oral or skin).
A2 No TLV recommended pending
						termination of toxicity or products, but air concentrations should be
						minimal.
TABLE II-Mineral Dusts
Substance
Million Particles Per Cubic
								  Foot*
Asbestos
5
Dust (nuisance, no free silica)
50
Graphite (natural)
15
Mica (below 1% free silica)
20
Portland cement
50
Silica-
Class I**
50
Class II**
20
Class III**
10
Class IV**
5
Slate (below 1% free silica)
50
Soapstone (below 1% free silica)
20
Talc (below 1% free silica)
20
Tremolite
5
Total dust (below 1% free silica)
50
____
* Using the light field low-power method of counting as
						described in the U.S. Public Health Report 47 No. 12, March 12, 1932, pp.
						669-672 or its equivalent and a standard type impinger or other equivalent
						instrument for taking atmospheric dust samples.
** Class I rock. Any rock formation uniformly containing
						up to and including 5%, by weight, of free silicon dioxide.
** Class II rock. Any rock formation uniformly containing
						more than 5%, up to and including 10%, by weight, of free silicon
						dioxide.
** Class III rock. Any rock formation uniformly
						containing more than 10%, up to and including 40%, by weight, of free silicon
						dioxide.
** Class IV rock. Any rock formation containing more than
						40%, by weight, of free silicon dioxide.