-
DEPARTMENT OF
CONSUMER ANDINDUSTRY SERVICESLICENSING AND REGULATORY AFFAIRSDIRECTOR'S OFFICE
OCCUPATIONAL HEALTH STANDARDS
– AIR CONTAMINANTS FOR CONSTRUCTIONProposed Draft August 15, 2012 Filed with the Secretary of State on
These rules become effective immediately upon filing with the Secretary of State unless adopted under section 33, 44, or 45a(6) of 1969 PA 306. Rules adopted under these sections become effective 7 days after filing with the Secretary of State.
(By authority conferred on the director of the department of licensing and regulatory affairs by sections 14 and 24 of 1974 PA 154, MCL 408.1014 and 408.1024; and Executive Reorganization Orders Nos.
1996-1, 1996-2, 2003-1, 2008-4, and 2011-4, MCL 330.3101, 445.2001, 445.2011, 445.2025 and
445.2030)
R 325.60151, R 325.60154, R 325.60155, R 325.60156, R 325.60157, R 325.60158, R 325.60159,
R 325.60160 and R 325.60161 of the Michigan Administrative Code are amended and R 325.60151a is added to the Michigan Administrative Code as follows:
PART 601. AIR CONTAMINANTS FOR CONSTRUCTION
R 325.60151 Construction air contaminants; scope; applicability; replacement of O.H. rules.
Rule 1. (1) An employer shall ensure that employee exposures 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, as listed in R 325.60154 to R 325.60161, are avoided.
(2) To achieve compliance with subrule (1) of this rule, an employer shall ensure that administrative or engineering controls are implemented whenever feasible. If administrative or engineering controls are not feasible to achieve full compliance, then protective equipment or other protective measures shall be used to keep the exposure of employees to air contaminants within the limits prescribed in this rule.
Any equipment and technical measures used for this purpose shall first be approved for each particular use by a competent industrial hygienist or other technically qualified person. Respirators shall be used in a manner that is in compliance with occupational health standard part 451 “Respiratory Protection,”
R 325.60051 et seq., part 451. respiratory protection,R 325.60051 to R 325.60052.(3) Occupational health standard
R 325.51401 et seq.,part 302 “Vinyl Chloride,” R 325.51401 to R 325.51414,of the MIOSHA Occupational Health Standards for General Industryapplies to the exposure of every employee to vinyl chloride in every employment and place of employment covered by these rules in place of any different standard on exposure to vinyl chloride that would otherwise be applicable by virtue of subrule (1) of this rule.(4)
These rules replace O.H. rule 6201.(5) (4) The “Threshold Limit Values (TLV) of the American Conference of Governmental Industrial Hygienists (A.C.G.I.H.) for 1970” appear in R 325.60153 to R 325.60161. The Threshold Limit Values identified in these
administrativerules as Maximum Allowable Concentrations (MAC) are specified in the rules that follow.(5) These rules do not apply to the following types of employment:
(a) Agriculture.
(b) Domestic.
(c) Mining.
(d) General industry work.
Exposure to air contaminants in general industry work is covered by occupational health standard part 301 “Air Contaminants for General Industry,” R 325.51101 to R 325.51108.
(6) These rules replace O.H. rule 6201.
R 325.60151a Availability of referenced standards.
Rule 1a. The following Michigan occupational safety and health standards are referenced in these rules. Up to 5 copies of these standards may be obtained at no charge from the Michigan Department of Licensing and Regulatory Affairs, MIOSHA Standards Section, 7150 Harris Drive,
P.O. Box 30643, Lansing, Michigan, 48909-8143 or via the internet at website: www.michigan.gov/mioshastandards. For quantities greater than 5, the cost, as of the time of adoption of these rules, is 4 cents per page.
(a) Occupational health standard part 301 “Air Contaminants for General Industry,” R 325.51101 to R 325.51108.
(b) Occupational health standard part 302 “Vinyl Chloride,” R 325.51401 to R 325.51414.
(c) Occupational health standard part 303 “Methylenedianiline,” R 325.50051 to R 325.50076.
(d) Occupational health standard part 304 “Ethylene oxide,” R 325.51151 to R 325.51177.
(e) Occupational health standard part 306 “Formaldehyde,” R 325.51451 to R 325.51477.
(f) Occupational health standard part 307 “Acrylonitrile,” R 325.51501 to R 325.51527.
(g) Occupational health standard part 308 “Inorganic Arsenic,” R 325.51601 to R 325.51628.
(h) Occupational health standard part 309 “Cadmium,” R 325.51851 to R 325.51886.
(i) Occupational health standard part 311 “Benzene,” R 325.77101 to R 325.77115.
(j) Occupational health standard part 312 “1,3-Butadiene,” R 325.50091 to R 325.50092.
(k) Occupational health standard part 313 “Methylene Chloride,” R 325.51651 to R 325.51652.
(l) Occupational health standard part 314 “Coke Oven Emissions,” R 325.50101 to R 325.50136.
(m) Occupational health standard part 451 “Respiratory Protection,” R 325.60051 to R 325.60052.
(n) Occupational health standard part 602 “Asbestos Standards for Construction,” R 325.51301 to R 325.51302.
(o) Occupational health standard part 603 “Lead Exposure in Construction,” R 325.51991 to R 325.51992.
(p) Occupational health standard part 604 “Chromium (VI) in Construction,” R 325.51995 to R 325.51997.
R 325.60154 Maximum allowable concentrations.
Rule 4. (1) Maximum allowable concentrations of air contaminants based on a repeated 8-hour work day exposure are listed in tables 1 to 7 in R 325.60155 to R 325.60161.
(2) A substance in tables 1 to 6 that is preceded by the letter A, C,
orS, or STEL is an especially hazardous contaminant and all the following precautions shall be taken:(a) If the substance is preceded by the letter "A", then an employer shall ensure that an employee or any part of an employee’s anatomy is not exposed to, or allowed to come in contact with, the substance by means of any respiratory, oral, or skin route.
(b) If the substance is preceded by the letter "C", then its MAC means the highest concentration at which an employer may allow a person to be exposed at any time unless noted otherwise. This concentration is commonly referred to as a “ceiling.”
(c) If the substance is preceded by the letter "S", then an employer shall ensure that precautions are taken to prevent skin absorption.
(d) If the substance is preceded by “STEL”, then it means the STEL listed. For example, an employee's 15-minute, time-weighted average exposure, shall not be exceeded at any time during a work day. The STEL is commonly referred to as the "short-term exposure limit."
R 325.60155 Maximum allowable concentrations for substances; A and B. Rule 5. Table 1. Substances A and B
Substance
MAC/Ceiling/STEL
ppm
mg/m3
Abate
---
15
Acetaldehyde
200
360
Acetic acid
10
25
Acetic anhydride
5
20
Acetone
1,000
2,400
Acetonitrile
40
70
Acetylene
Inert gas
Acetylene dichloride, see 1,2-Dichloroethylene
Acetylene tetrabromide
1
14
Acrolein
0.1
0.25
S
Acrylamide
---
0.3
SAcrylonitrile, see OH Part 307, R 325.51501 to R 325.51527
et seq.*S
Aldrin
---
0.25
S
Allyl alcohol
2
5
Allyl chloride
1
3
C
Allyl glycidyl ether (AGE)
10
45
Allyl propyl disulfide
2
12
Alundum (Al203)
Inert dust
2-Aminoethanol, see Ethanolamine
2-Aminopyridine
0.5
2
Ammonia
50
35
Ammonium sulfamate (amate)
---
15
n-Amyl acetate
100
525
sec-Amyl acetate
125
650
S
Aniline
5
19
S
Anisidine (o,p-isomers)
---
0.5
Antimony & compounds (as Sb)
---
0.5
ANTU (alpha naphthyl thiourea)
---
0.3
Argon
Inert gas
Arsenic, inorganic compounds, see OH Part 308, R 325.51601 to R 325.51628
etseq.*Arsenic, organic compounds (as As)
---
0.5
Arsine
0.05
0.2
S
Azinphos-methyl
---
0.2
Barium (soluble compounds)
---
0.5
S,CBenzene (benzol), see OH Part 311, R 325.77101 to R 325.77115
et seq.*A,S
Benzidine
---
---
p-Benzoquinone, see Quinone
Benzoyl peroxide
---
5
Benzyl chloride
1
5
Beryllium
---
0.002
Biphenyl, see Diphenyl
Bisphenol A, see Diglycidyl ether
Boron oxide
---
15
Boron tribromide
1
10
C
Boron trifluoride
1
3
Bromine
0.1
0.7
Bromine pentafluoride
0.1
0.7
S
Bromoform
0.5
5
Butadiene (1,3-butadiene), see OH Part 312, R 325.50091 to R 325.50092
et seq.*Butanethiol, see Butyl mercaptan
2-Butanone
200
590
S
2-Butoxy ethanol (butyl cellosolve)
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
S,C
Butylamine
5
15
S,C
tert-Butyl chromate
(as Cr03)(as Cr+6), See OH Part 604, R 325.51995 to R 325.51997*, **---
0.1 ---
n-Butyl glycidyl ether (BGE)
50
270
Butyl mercaptan
0.5
1.5
p-tert-Butyltoluene
10
60
C --- See R 325.60154(2)(b).
S --- See R 325.60154(2)(c).
A --- See R 325.60154(2)(a).
* Caution--these rules contain extensive requirements for exposure to these substances.
** If the exposure limit in 29 C.F.R. §1926.1126 (adopted by reference in OH Part 604, R 325.51995 to R 325.51997) is stayed or is otherwise not in effect, the exposure limit is a ceiling of 0.1 mg/m3 and has an "S" notation.
R 325.60156 Maximum allowable concentrations for substances; C and D. Rule 6. Table 2. Substances C and D
TABLE 2
Substance
MAC/Ceiling/STEL
ppm
mg/m3
Cadmium and cadmium compounds
(metal dust and soluble salts), see OH Part 309,R 325.51851 to R 325.51886
et seq.*CCadmium oxide fume (as Cd), see R 325.51851 et seq.*Calcium arsenate
---
1
Calcium carbonate
Inert dust
Calcium oxide
---
5
Camphor (synthetic)
2
---
Carbaryl (Sevin®)
---
5
Carbon black
---
3.5
Carbon dioxide
5,000
9,000
S
Carbon disulfide
20
60
Carbon monoxide
50
55
S,C
Carbon tetrachloride
10
65
Cellulose (paper fiber)
Inert dust
S
Chlordane
---
0.5
S
Chlorinated camphene
---
0.5
Chlorinated diphenyl oxide
---
0.5
Chlorine
1
3
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
S
Chlorodiphenyl (42% Chlorine)
---
1
S
Chlorodiphenyl (54% Chlorine)
---
0.5
1-Chloro-2,3-epoxypropane, see Epichlorohydrin
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
S
Chloroprene (2-chloro-1,3-butadiene)
25
90
Chromic acid and chromates
(as Cr03)(as Cr+6) see OH Part 604, R 325.51995 to R 325.51997*, ***---
0.1---
Chromium (VI) compounds, see OH Part 604, R 325.51995 to R 325.51997*, ***
Chromium, sol. chromic & chromous salts (as Cr) Metal & insol. Salts
---
---
0.5
1
Coal tar pitch volatiles (benzene soluble fraction: anthracene, BaP, phenanthrene, acridine, chrysene, pyrene)
---
0.2
Cobalt, metal fume & dust
---
0.1
Coke oven emissions, see OH Part 314, R 325.50101 to R 325.50136
et seq.*Copper fume Dusts and mists
---
---
0.1
1
Corundum (Al203)
Inert dust
Cotton dust (raw)
---
1
Crag® herbicide
---
15
S
Cresol (all isomers)
5
22
Crotonaldehyde
2
6
S
Cumene
50
245
S
Cyanide (as CN)
---
5
Cyanogen
10
---
Cyclohexane
300
1,050
Cyclohexanol
50
200
Cyclohexanone
50
200
Cyclohexene
300
1,015
Cyclopentadiene
75
200
2,4-D
---
10
S
DDT (Dichlorodiphenyl-trichloroethane)
---
1
DDVP, see Dichlorvos
S
Decaborane
0.05
0.3
S
Demeton®
---
0.1
Diacetone alcohol (4-hydroxy-4-methyl-2- pentanone)
50
240
1,2-Diainoethane, see Ethylenediamine
Diazomethane
0.2
0.4
Diborane
0.1
0.1
S,C
1,2-Dibromoethane (ethylene dibromide)
25
190
Dibutyl phosphate
1
5
Dibutyl phthalate
---
5
C
Dichloroacetylene
0.1
0.4
C
o-Dichlorobenzene
50
300
p-Dichlorobenzene
75
450
Dichlorodifluoromethane
1,000
4,950
1,3-Dichloro-5,5-dimethyl hydantoin
---
0.2
1,1-Dichloroethane
100
400
1,2-Dichloroethane
50
200
1,2-Dichloroethylene
200
790
S,C
Dichloroethyl ether
15
90
Dichloromethane, see Methylene chloride
Dichloromonofluoromethane
1,000
4,200
C
1,1-Dichloro-1-nitroethane
10
60
1,2-Dichloropropane, see Propylene dichloride
Dichlorotetrafluoroethane
1,000
7,000
S
Dichlorvos (DDVP)
---
1
S
Dieldrin
---
0.25
Diethylamine
25
75
S
Diethylamino, ethanol
10
50
S,C
Diethylene triamine
10
42
Diethyl ether, see Ethyl ether
Difluorodibromomethane
100
860
C
Diglycidyl ether (DGE)
0.5
2.8
Dihydroxybenzene, see Hydroquinone
Diisobutyl ketone
50
290
S
Diisopropylamine
5
20
Dimethoxymethane, see Methylal
S
Dimethyl acetamide
10
35
Dimethylamine
10
18
Dimethylaminobenzene, see Xylidene
S
Dimethylaniline (N-dimethylaniline)
5
25
Dimethylbenzene, see Xylene
Dimethyl-1,2-dibromo-2,2-dichloroethylphosphate (Dibrom®)
---
3
S
Dimethylformamide
10
30
2,6-Dimethylheptanone, see Diisobutyl ketone
S
1,1-Dimethylhydrazine
0.5
1
Dimethylphthalate
---
5
S
Dimethylsulfate
1
5
S
Dinitrobenzene (all isomers)
---
1
S
Dinitro-o-cresol
---
0.2
S
Dinitrotoluene
---
1.5
S
Dioxane (diethylene dioxide)
100
360
Diphenyl
0.2
1
Diphenyl amine
---
10
Diphenylmethane diisocyanate, see Methylene bisphenyl isocyanate (MDI)
S
Dipropylene glycol methyl ether
100
600
Di-sec, octyl phthalate (di-2-ethylhexylphthalate)
---
5
C --- See R 325.60154(2)(b).
S --- See R 325.60154(2)(c).
A --- See R 325.60154(2)(a).
* Caution--these rules contain extensive requirements for exposure to these substances.
*** If the exposure limit in 29 C.F.R. §1926.1126 (adopted by reference in OH Part 604, R 325.51995 to R 325.51997) is stayed or is otherwise not in effect, the exposure limit is 0.1 mg/m3 for chromic acid and chromates (Cr+6) as an 8-hour TWA.
R 325.60157 Maximum allowable concentrations for substances; E to H. Rule 7. Table 3. Substances E to H
TABLE 3
Substance
MAC/Ceiling/STEL
ppm
mg/m3
Emery
Inert dust
S
Endosulfan (Thiodan®)
---
0.1
S
Endrin
---
0.1
S
Epichlorohydrin
5
19
S
EPN
---
0.5
1,2-Epoxypropane, see Propylene oxide
2,3-Epoxy-1-propanol, see Glycidol
Ethane
Inert gas
Ethanethiol, see Ethyl mercaptan
Ethanolamine
3
6
S
2-Ethoxyethanol
200
740
S
2-Ethoxyethylacetate (cellosolve acetate)
100
540
Ethyl acetate
400
1,400
S
Ethyl acrylate
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
0.5
1
Ethyl silicate
100
850
Ethylene
Inert gas
S
Ethylene chlorohydrin
5
16
Ethylenediamine
10
25
Ethylene dibromide, see 1,2-Dibromoethane
Ethylene dichloride, see 1,2-Dichloroethane
S,C
Ethylene glycol dinitrate and/or Nitroglycerin
0.2
Ethylene glycol monomethyl ether acetate, see Methyl cellosolve acetate
S
Ethyleneimine
0.5
1
Ethylene oxide, see OH Part 304, R 325.51151 to R 325.51177
et seq.*Ethylidine chloride, see 1,1-Dichloroethane
S
N-Ethylmorpholine
20
94
Ferbam
---
15
Ferrovanadium dust
---
1
Fibrous glass
Inert dust
Fluoride (as F)
---
2.5
Fluorine
0.1
0.2
Fluorotrichloromethane
1,000
5,600
CFormaldehyde, see OH Part 306, R 325.51451 to R 325.51477
et seq.*Formic acid
5
9
S
Furfural
5
20
Furfuryl alcohol
50
200
Gasoline (limits will be based on aromatic hydrocarbons in mixture)
Glycerine mist
Inert mist
Glycidol (2,3-epoxy-1-propanol)
50
150
Glycol monoethyl ether, see 2-Ethoxyethanol
Graphite (synthetic)
Inert dust
Guthion®, see Azinphos-methyl
Gypsum
Inert dust
Hafnium
---
0.5
Helium
Inert gas
S
Heptachlor
---
0.5
Heptane (n-heptane)
500
2,000
S
Hexachloroethane
1
10
S
Hexachloronaphthalene
---
0.2
Hexane (n-hexane)
500
1,800
2-Hexanone
100
410
Hexone (methyl isobutyl ketone)
100
410
sec-Hexyl acetate
50
300
S
Hydrazine
1
1.3
Hydrogen
Inert gas
Hydrogen bromide
3
10
C
Hydrogen chloride
5
7
S
Hydrogen cyanide
10
11
Hydrogen fluoride
3
2
Hydrogen peroxide
1
1.4
Hydrogen selenide
0.05
0.2
Hydrogen sulfide
10
15
Hydroquinone
---
2
C --- See R 325.60154(2)(b).
S --- See R 325.60154(2)(c).
A --- See R 325.60154(2)(a).
* Caution--these rules contain extensive requirements for exposure to these substances.
R 325.60158 Maximum allowable concentrations for substances; I to M. Rule 8. Table 4. Substances I to M
TABLE 4
Substance
MAC/Ceiling/STEL
ppm
mg/m3
Indene
10
45
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
Isopropyl ether
500
2,100
Isopropyl glycidyl ether (IGE)
50
240
Kaolin
Inert dust
Ketene
0.5
0.9
Lead and lead compounds, see OH Part 603, R 325.51991 to R 325.51992
et seq.*Limestone
Inert dust
S
Lindane
---
0.5
Lithium hydride
---
0.025
L.P.G. (liquified petroleum gas)
1,000
1,800
Magnesite
Inert dust
Magnesium oxide fume
15
S
Malathion
---
15
Maleic anhydride
0.25
1
C
Manganese and compounds (as Mn)
---
5
Marble
Inert dust
S
Mercury
---
0.1
S
Mercury (organic compounds)
---
0.01
Mesityl oxide
25
100
Methane
Inert gas
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
S
Methyl acrylate
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
S,C
Methyl bromide
20
80
Methyl butyl ketone, see 2-Hexanone
S
Methyl cellosolve
25
80
S
Methyl cellosolve acetate
25
120
C
Methyl chloride
100
210
Methyl chloroform
350
1,900
Methylcyclohexane
500
2,000
Methylcyclohexanol
100
470
S
o-Methylcyclohexanone
100
460
Methylenedianiline (MDA), see OH Part 303, R 325.50051 to R 325.50076
et seq.*Methyl ethyl ketone (MEK), see 2-Butanone
Methyl formate
100
250
S
Methyl iodide
5
28
Methyl isoamyl ketone
100
475
S
Methyl isobutyl carbinol
25
100
Methyl isobutyl ketone, see Hexone
S
Methyl isocyanate
0.02
0.05
Methyl mercaptan
0.5
1
Methyl methacrylate
100
410
Methyl propyl ketone, see 2-Pentanone
C
Methyl silicate
5
30
C
alpha-Methyl styrene
100
480
C
Methylene bisphenyl isocyanate (MDI)
0.02
0.2
Methylene chloride (dichloromethane), see OH Part 313, R 325.51651 to R 325.51652
et seq.*Molybdenum
(soluble compounds) (insoluble compounds)
---
---
5
15
S
Monomethyl aniline
2
9
S,C
Monomethyl hydrazine
0.2
0.35
S
Morpholine
20
70
C --- See R 325.60154(2)(b).
S --- See R 325.60154(2)(c).
STEL --- See R 325.60154(d).
A --- See R 325.60154(2)(a).
* Caution--these rules contain extensive requirements for exposure to these substances.
R 325.60159 Maximum allowable concentrations for substances; N to P. Rule 9. Table 5. Substances N to P
TABLE 5
Substance
MAC/Ceiling/STEL
ppm
mg/m3
Naphtha (coal tar)
100
400
Naphtha (petroleum) (MAC will be based on aromatic hydrocarbons in mixture)
Naphthalene
10
50
A
beta-Naphthylamine
---
Neon
Inert gas
Nickel carbonyl
0.001
0.007
Nickel, metal and soluble compounds (as Ni)
---
1
S
Nicotine
---
0.5
Nitric acid
2
5
Nitric oxide
25
30
S
p-Nitroaniline
1
6
S
Nitrobenzene
1
5
S
p-Nitrochlorobenzene
---
1
Nitroethane
100
310
Nitrogen
Inert gas
Nitrogen dioxide
5
9
Nitrogen trifluoride
10
29
S
Nitroglycerin
0.2
2
Nitromethane
100
250
1-Nitropropane
25
90
2-Nitropropane
25
90
S,A
N-Nitrosodimethylamine (dimethylnitrosomine)
---
S
Nitrotoluene
5
30
Nitrotrichloromethane, see Chloropicrin
Nitrous oxide
Inert gas
S
Octachloronaphthalene
---
0.1
Octane
400
1,900
Oil mist, particulate
---
5
Oil mist, vapor (MAC will be based on aromatic hydrocarbons in mixture)
Osmium tetroxide
---
0.002
Oxalic acid
---
1
Oxygen difluoride
0.05
0.1
Ozone
0.1
0.2
S
Paraquat
---
0.5
S
Parathion
---
0.1
Pentaborane
0.005
0.01
S
Pentachloronaphthalene
---
0.5
S
Pentachlorophenol
---
0.5
Pentaerythritol
Inert particulate
Pentane
500
1,500
2-Pentanone
200
700
Perchloroethylene
100
670
Perchloromethyl mercaptan
0.1
0.8
Perchloryl fluoride
3
13.5
Petroleum distillates (naphtha) (MAC will be based on aromatic hydrocarbons in mixture)
S
Phenol
5
19
S
p-Phenylene diamine
---
0.1
Phenyl ether (vapor)
1
7
Phenyl ether-biphenyl mixture (vapor)
1
7
Phenylethylene, see Styrene
Phenyl glycidyl ether (PGE)
10
60
S
Phenylhydrazine
5
22
S
Phosdrin (Mevinphos®)
---
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
S
Picric acid
---
0.1
Pival® (2-pivalyl-1,3-indandione)
---
0.1
Plaster of Paris
Inert dust
Platinum, soluble salts (as Pt)
---
0.002
Polytetrafluoroethylene decomposition products, see Teflon® decomposition products
Propane
Inert gas
S
Propargyl alcohol
1
---
A
beta-Propiolactone
---
n-Propyl acetate
200
840
Propyl alcohol
200
500
n-Propyl nitrate
25
110
Propylene bichloride
75
350
S
Propylene imine
2
5
Propylene oxide
100
240
Propyne, see Methyl acetylene
Pyrethrum
---
5
Pyridine
5
15
C --- See R 325.60154(2)(b).
S --- See R 325.60154(2)(c).
A --- See R 325.60154(2)(a).
R 325.60160 Maximum allowable concentrations for substances; Q to Z. Rule 10. Table 6. Substances Q to Z
TABLE 6
Substance
MAC/Ceiling/STEL
ppm
mg/m3
Quinone
0.1
0.4
S
RDX
---
1.5
Rhodium, metal fume, dusts, and insoluble compounds
(as Rh)
---
0.1
Rhodium, soluble compounds (as Rh)
---
0.001
Ronnel
---
10
Rotenone (commercial)
---
5
Rouge
Inert dust
Selenium compounds (as Se)
---
0.2
Selenium hexafluoride
0.05
0.4
Silicon carbide
Inert dust
Silver, metal and soluble compounds
---
0.01
S
Sodium fluoroacetate (1080)
---
0.05
Sodium hydroxide
---
2
Starch
Inert dust
Stibine
0.1
0.5
Stoddard solvent
200
1,150
Strychnine
---
0.15
C
Styrene monomer (phenylethylene)
100
420
Sucrose
Inert dust
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®
2,4,5T
---
10
Tantalum
---
5
S
TEDP
---
0.2
Teflon® decomposition products (maintain minimal air concentration)
Tellurium
---
0.1
Tellurium hexafluoride
0.02
0.2
S
TEPP
---
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
S
1,1,2,2-Tetrachloroethane
5
35
Tetrachloroethylene, see Perchloroethylene
Tetrachloromethane, see Carbon tetrachloride
S
Tetrachloronaphthalene
---
2
S
Tetraethyl lead (as Pb)
---
0.075a
Tetrahydrofuran
200
590
S
Tetramethyl lead (TML) (as Pb)
---
0.150
S
Tetramethyl succinonitrile
0.5
3
Tetranitromethane
1
8
S
Tetryl (2,4,6-trinitrophenylmethyl-nitramine)
---
1.5
S
Thallium, soluble compounds (as Tl)
---
0.1
Thiram
---
5
Tin
(inorganic compounds, except SnH4 and SnO2) (organic compounds)
---
---
2
0.1
Tin oxide
Inert particulate
Titanium dioxide
Inert particulate
Toluene (toluol)
200
750
C
Toluene-2,4-diisocyanate
0.02
0.14
S
o-Toluidine
5
22
Toxaphene, see Chlorinated camphene
Tributyl phosphate
---
5
1,1,1-Trichloroethane, see Methyl chloroform
S
1,1,2-Trichloroethane
10
45
Trichloroethylene
100
535
Trichloromethane, see Chloroform
S
Trichloronaphthalene
---
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
Trimethyl benzene
25
120
2,4,6-Trinitrophenol, see Picric acid
2,4,6-Trinitrophenylmethylnitramine, see Tetryl
S
Trinitrotoluene
---
1.5
Triorthocresyl phosphate
---
0.1
Triphenyl phosphate
---
3
Tungsten and compounds (as W) Insoluble
Soluble
---
---
5
1
Turpentine
100
560
Uranium (natural) soluble & insoluble compounds (as
U)
---
0.2
C
Vanadium (V2O5 dust) (V2O5 fume)
---
---
0.5
0.1
Vinyl benzene, see Styrene
C
Vinyl chloride, see OH Part 302, R 325.51401 to R 325.51414
et seq.*Vinyl cyanide, see Acrylonitrile
Vinyl toluene
100
480
Warfarin
---
0.1
Xylene (xylol)
100
435
S
Xylidine
5
25
Yttrium
---
1
Zinc chloride fume
---
1
Zinc oxide fume
---
5
Zirconium compounds (as Zr)
---
5
C --- See R 325.60154(2)(b).
S --- See R 325.60154(2)(c).
STEL --- See R 325.60154(2)(d)
A --- See R 325.60154(2)(a).
a The 1970 ACGIH standard for Tetraethyl lead is 0.100 mg/m3.
* Caution--these rules contain extensive requirements for exposure to these substances.
R 325.60161 Maximum allowable concentrations for mineral dusts. Rule 11. Table 7. Mineral dusts
TABLE 7
Substance
MAC
mppcf
mg/m3
Silica
Crystalline *
Quartz (respirable)
Cristobalite, see crystalline quartz
MAC =250% SiO2+5
MAC same asquartz10 mg/m3_
%SiO2+2
Amorphous, including natural diatomaceous earth
20
80 mg/m3_
%SiO2
Silicates (less than 1% crystalline silica)
Asbestos, all types, see OH Part 602,
Asbestos in Construction,R 325.51301 to R 325.51302et seq.Mica
20
Portland cement
50
Soapstone
20
Talc (non-asbestiform)
20
Talc (fibrous), see OH Part 602,
Asbestos in Construction,R 325.51301 to R 325.51302et seq.Tremolite, see OH Part 602,
Asbestos in Construction,R 325.51301 to R 325.51302et seq.Graphite (natural)
15
Inert or nuisance particles **
50 of total dust less than 1%
SiO2
(or 15 mg/m3, whichever is the smaller)
* The percentage of crystalline silica, SiO2, in the formula is the amount determined from airborne samples.
** The following are some examples of inert or nuisance particulates when toxic impurities are not present; e.g. quartz less than 1%.
Alundum (A1203) Gypsum Rouge
Calcium carbonate Cellulose Corundum (A1203)
Limestone Magnesite Marble
Silicon carbide Starch Sucrose
Emery
Pentaerythritol
Tin oxide
Glycerine mist
Plaster of Paris
Titanium dioxide
Graphite (synthetic)
Portland cement
Vegetable oil mists (except castor, cashew nut, or similar irritant oils)
Document Information
- Rules:
- R325.50051
R325.50076
R325.50091
R325.50092
R325.50101
R325.50136
R325.51101
R325.51108
R325.51151
R325.51177
R325.51301
R325.51302
R325.51401
R325.51414
R325.51451
R325.51477
R325.51501
R325.51527
R325.51601
R325.51628
R325.51651
R325.51652
R325.51851
R325.51886
R325.51991
R325.51992
R325.51995
R325.51997
R325.60051
R325.60052
R325.60151
R325.60153
R325.60154
R325.60155
R325.60156
R325.60157
R325.60158
R325.60159
R325.60160
R325.60161
R325.77101
R325.77115