1. (1) The Commissioner of Labor and Workforce Development does not adopt the following federal occupational safety and health standards:

   1. (a) 29 CFR 1910.1 Purpose and scope.
   2. (b) 29 CFR 1910.2 Definitions.
   3. (c) 29 CFR 1910.3 Petitions for the issuance, amendment, or repeal of a standard.
   4. (d) 29 CFR 1910.4 Amendments to this part.
   5. (e) 29 CFR 1910.15 Shipyard employment.
   6. (f) 29 CFR 1910.16 Longshoring and marine terminals.
   7. (g) 29 CFR 1910.502(b) through 29 CFR 1910.502(p)
   8. (h) 29 CFR 1910.502(q)(1) through 29 CFR 1910.502(q)(2)(i)
   9. (i) 29 CFR 1910.502(q)(3)(i)
   10. (j) 29 CFR 1910.502(s)

2. (2) In lieu of the current federal occupational safety and health standards codified in Title 29, Code of Federal Regulations, Part 1910, Rule 0800-01-01-.06 of this chapter, or the absence thereof because of repeal or revocation, the Commissioner of Labor and Workforce Development adopts the standards limiting exposure to air contaminants as contained in subparagraph (b) of this rule. The information contained therein was compiled and adopted from the following federal occupational safety and health standards as published in the Federal Register in the volume and on the page(s) indicated.

   1. (a) 29 CFR 1910.1000 at 54 FR 2920-2983 and the following corrections and amendments thereto:

      1. 1. 29 CFR 1910.1000 at 54 FR 28054-28061.
      2. 2. 29 CFR 1910.1000 at 54 FR 36767-36768.
      3. 3. 29 CFR 1910.1000 at 54 FR 41244.
      4. 4. 29 CFR 1910.1000 at 54 FR 47513.
      5. 5. 29 CFR 1910.1000 at 54 FR 50372-50373. FOR GENERAL INDUSTRY
      6. 6. 29 CFR 1910.1000 at 55 FR 3724.
      7. 7. 29 CFR 1910.1000 at 55 FR 12819.
      8. 8. 29 CFR 1910.1000 at 55 FR 19259.
      9. 9. 29 CFR 1910.1000 at 55 FR 46950.
      10. 10. 29 CFR 1910.1000 at 57 FR 29204-29206.
      11. 11. 29 CFR 1910.1000 at 57 FR 42388-42389.

   2. (b) Subpart Z - Toxic and Hazardous Substances 29 CFR 1910.1000 - Air Contaminants as adopted by subparagraph (a) of this rule reads as follows: An employee’s exposure to any substance listed in Table Z-1-A shall be limited in accordance with the following requirements:

      1. 1. Limits for Air Contaminants Columns. An employee’s exposure to any substance listed in Table Z-1-A shall not exceed the Time Weighted Average (TWA), Short Term Exposure Limit (STEL) and Ceiling Limit specified for that substance in Table Z-1-A.
      2. 2. Skin Designation. To prevent or reduce skin absorption, an employee’s skin exposure to substances listed in Table Z-1-A with an “X” in the Skin Designation column following the substance name shall be prevented or reduced to the extent necessary in the circumstances through the use of gloves, coveralls, goggles, or other appropriate personal protective equipment, engineering controls or work practices.
      3. 3. Definitions. The following definitions are applicable to the limits for air contaminants columns of Table Z-1-A:
   3. (i) Time weighted average (TWA) is the employee’s average airborne exposure in any 8-hour work shift of a 40-hour work week which shall not be exceeded.
   4. (ii) Short term exposure limit (STEL) is the employee’s 15-minute time weighted average exposure which shall not be exceeded at any time during the work day unless another time limit is specified in a parenthetical notation below the limit. If another time period is specified, the time weighted average exposure over that time period shall not be exceeded at any time during the working day.

   5. (iii) Ceiling is the employee’s exposure which shall not be exceeded during any part of the work day. If instantaneous monitoring is not feasible, then the ceiling shall be assessed as a 15-minute time weighted average exposure which shall not be exceeded at any time over a working day.

      1. 4. Additional Definition. The terms “substance”, “air contaminant”, and “material” are equivalent in meaning for 29 CFR 1910.1000.

   6. (c) Computation formulae. The computation formula which shall apply to employee exposure to more than one substance for which 8-hour time weighted averages are listed in Subpart Z of 29 CFR Part 1910 in order to determine whether an employee is exposed over the regulatory limit is as follows: FOR GENERAL INDUSTRY

      1. 1. The cumulative exposure for an 8-hour work shift shall be computed as follows: E = (CaTa + CbTb + . . . CnTn) ÷ 8 Where: E is the equivalent exposure for the working shift. C is the concentration during any period of time. T where the concentration remains constant. T is the duration in hours of the exposure at the concentration C.
      2. 2. To illustrate the formula prescribed above, assume that Substance A has an 8- hour time weighted average limit of 100 ppm noted in Table Z-1-A. Assume that an employee is subject to the following exposure: Two hours exposure at 150 ppm Two hours exposure at 75 ppm Four hours exposure at 50 ppm The value of E shall not exceed the 8-hour time weighted average specified in Subpart Z of 29 CFR Part 1910 for the material involved. Substituting this information in the formula, we have: (2 x 150 + 2 x 75 + 4 x 50) ÷ 8 = 81.25 ppm. Since 81.25 ppm is less than 100 ppm, the 8-hour time weighted average limit, the exposure is acceptable.
      3. 3. In case of a mixture of air contaminants, an employer shall compute the equivalent exposure as follows: Em = (C1 ÷ L1) + (C2 ÷ L2) + . . . (Cn ÷ Ln) Where: Em is the equivalent exposure for the mixture. C is the concentration of a particular contaminant. L is the exposure limit for that substance specified in Subpart Z of 29 CFR Part 1910. The value of Em shall not exceed unity (1).
      4. 4. To illustrate the formula prescribed above, consider the following exposures: Substance Actual concentration of 8 8 hr. TWA PEL hour exposure (ppm) (ppm) B 500 1000 C 45 200 D 40 200 Substituting in the formula, we have: Em = 500 ÷ 1000 + 45 ÷ 200 + 40 ÷ 200 Em = 0.500 + 0.225 + 0.200 Em = 0.925 Since Em is less than unity (1), the exposure combination is within acceptable limits. FOR GENERAL INDUSTRY
   7. (d) To achieve compliance with subparagraphs (b) and (c) of this rule, administrative or engineering controls must first be determined and implemented whenever feasible. When such controls are not feasible to achieve full compliance, protective equipment or any other protective measures shall be used to keep the exposure of employees to air contaminants within the limits prescribed herein. Any equipment and/or technical measures used for this purpose must be approved for each particular use by a competent industrial hygienist or other technically qualified person. Whenever respirators are used, their use shall comply with 29 CFR 1910.134.

   8. (e) Note: Abbreviations used in Table Z-1-A.

      1. 1. As determined from breathing-zone air samples:
   9. (i) ppm - Parts of vapor or gas per million parts of contaminated air by volume at 25 degrees C and 760 torr.
   10. (ii) mg/m3 - Approximate milligrams of substance per cubic meter of air.

   11. (iii) STEL - Short Term Exposure Limit, duration is 15 minutes, unless otherwise noted.

       1. 2. CAS No. - Chemical Abstract Service Number, the CAS number is for information only. Enforcement is based on the substance name. For an entry covering more than one metal compound measured as the metal, the CAS number for the metal is given—not the CAS numbers for the individual compounds.

3. (3) TABLE Z-1-A - Limits For Air Contaminants. Substance CAS No. TWA STEL Ceiling Skin desig- nation ppm mg/m3 ppm mg/m3 ppm mg/m3 Acetaldehyde 75-07-0 100 180 150 270 — — — Acetic acid 64-19-7 10 25 — — — — — Acetic anhydride 108-24-7 — — — — 5 20 — Acetone 67-64-1 750 1800 1000 2400 — — — Acetonitrile 75-05-8 40 70 60 105 — — — 2-Acetylaminofluorine; see 29 CFR 53-96-3 — — — — — — — 1910.1003 Acetylene dichloride; see 1,2- Dichloroethylene Acetylene tetrabromide 79-27-6 1 14 — — — — — Acetylsalicylic acid (Aspirin) 50-78-2 — 5 — — — — — Acrolein 107-02-8 0.1 0.25 0.3 0.8 — — — Acrylamide 79-06-1 — 0.03 — — — — X Acrylic acid 79-10-7 10 30 — — — — X Acrylonitrile; see 29 CFR 1910.1045 107-13-1 — — — — — — — Aldrin 309-00-2 — 0.25 — — — — X Allyl alcohol 107-18-6 2 5 4 10 — — X Allyl chloride 107-05-1 1 3 2 6 — — — Allyd glycidl either (AGE) 106-92-3 5 22 10 44 — — — Allyl propyl disulfide 2179-59-1 2 12 3 18 — — — alpha-Alumina 1344-28-1 — — — — — — — Total dust — — 10 — — — — — FOR GENERAL INDUSTRY Respirable fraction — — 5 — — — — — Aluminum (As al) 7429-90-5 Metal Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Pyro powders — — 5 — — — — — Welding fumes — — 5 — — — — — Soluble salts — — 2 — — — — — Alkyls — — 2 — — — — — 4-Aminodiphenyl; see 29 CFR 92-67-1 1910.1003 2-Aminoethanol; see Ethanolamine 2-Aminopyridine 504-29-0 0.5 2 — — — — — Amitrole 61-82-5 — 0.2 — — — — — Ammonia 7664-41-7 — — 35 27 — — — Ammonium chloride fume 12125-02-9 — 10 — 20 — — — Ammonium sulfamate 7773-06-0 Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — n-Amyl acetate 628-63-7 100 525 — — — — — Sec-Amyl acetate 626-38-0 125 650 — — — — — Aniline and homologs 62-53-3 2 8 — — — — X Anisidine (o-,p-isomers) 29191-52-4 — 0.5 — — — — X Antimony and compounds (as Sb) 7440-36-0 — 0.5 — — — — — ANTU (alpha Naphthylthiourea) 86-88-4 — 0.3 — — — — — Arsenic, organic compounds (as As) 7440-38-2 — 0.5 — — — — — Arsenic, inorganic compounds (as 7440-38-2 As); see 29 CFR 1910.1018 Arsine 7784-42-1 0.05 0.2 — — — — — Asbestos; see 29 CFR 1910.1001 Varies and 29 CFR 1926.1101 Atrizine 1912-24-9 — 5 — — — — — Azinphos-methyl 86-50-0 — 0.2 — — — — X Barium, soluble compounds (as Ba) 7440-39-3 — 0.5 — — — — — Barium sulfate 7727-43-7 Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Benomyl 17804-35-2 Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Benzene; see 29 CFR 1910.1028 71-43-2 Industries excluded from 29 CFR 10 — 25 — 50 — — 1910.1028 (STEL – 10 minutes) Benzidine; see 29 CFR 1910.1003 92-87-5 p-Benzoquinone; see Quinone Benzo(a)pyrene; see Coal tar pitch volatiles Benzoyl peroxide 94-36-0 — 5 — — — — — Benzyl chloride 100-44-7 1 5 — — — — — Beryllium and beryllium Compounds 7440-41-7 — 0.002 — 0.005 — 0.025 — (as Be) (STEL – 30 minutes) Applicable where the exposure limits or any operations or sectors FOR GENERAL INDUSTRY where the exposure limits in § 1910.1024 are stayed or otherwise not in effect. Biphenyl; see Diphenyl Bismuth telluride, Undoped 1304-82-1 Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Bismuth telluride, Se-doped — — 5 — — — — — Borates, tetra, sodium salts Anhydrous 1330-43-4 — 10 — — — — — Decahydrate 1303-96-4 — 10 — — — — — Pentahydrate 12179-04-3 — 10 — — — — — Boron oxide 1303-86-2 Total dust — — 10 — — — — — Boron tribromide 10294-33-4 — — — — 1 10 — Boron trifluoride 7637-07-2 — — — — 1 3 — Bromacil 314-40-9 1 10 — — — — — Bromine 7726-95-6 0.1 0.7 0.3 2 — — — Bromine pentafluoride 7789-30-2 0.1 0.7 — — — — — Bromoform 75-25-2 0.5 5 — — — — X Butadiene (1,3-Butadiene); see 29 106-99-8 CFR 1910.1051 Butane 106-97-8 800 1900 — — — — — Butanethiol; see Butyl mercaptan 2-Butanone (Methyl ethyl ketone) 78-93-3 200 590 300 885 — — — 2-Butoxyethanol 111-76-2 25 120 — — — — X n-butyl-acetate 123-86-4 150 710 200 950 — — — Sec-Butyl acetate 105-46-4 200 950 — — — — — Tert-Butyl acetate 540-88-5 200 950 — — — — — Butyl acrylate 141-32-2 10 55 — — — — — n-Butyl alcohol 71-36-3 — — — — 50 150 X Sec-Butyl alcohol 78-92-2 100 305 — — — — — Tert-Butyl alcohol 75-65-0 100 300 150 450 — — — Butylamine 109-73-9 — — — — 5 15 X Tert-Butyl chromate (as CrO3) 1189-85-1 — — — — 0.1 X If the exposure limit in § 1910.1026 is stayed or is otherwise not in effect, the exposure limit is a ceiling of 0.1 mg/m³. n-Butyl glycidyl ether (BGE) 2426-08-6 25 135 — — — — — n-Butyl lactate 138-22-7 5 25 — — — — — Butyl mercaptan 109-79-5 0.5 1.5 — — — — — o-sec-Butylphenol 89-72-5 5 30 — — — — X p-tert-Butyltoluene 98-51-1 10 60 20 120 — — — Cadmium fume and dust (as Cd); 7440-43-9 see 29 CFR 1910.1027 Calcium carbonate 1317-65-3 Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Calcium cyanamide 156-62-7 — 0.5 — — — — — Calcuim hydroxide 1305-62-0 — — — — — Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — FOR GENERAL INDUSTRY Calcium oxide 1305-78-8 5 — — — — — Calcium silicate 1344-95-2 Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Calcium sulfate 7778-18-9 Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Camphor, synthetic 76-22-2 — 2 — — — — — Caprolactam 105-60-2 Dust — — 1 — 3 — — — Vapor — 5 20 10 40 — — — Captafol (Difolatan®) 2425-06-1 — 0.1 — — — — — Captan 133-06-2 — 5 — — — — — Carbaryl (Sevin®) 63-25-2 — 5 — — — — — Carbofluran (Furadan®) 1563-66-2 — 0.1 — — — — — Carbon black 1333-86-4 — 3.5 — — — — — Carbon dioxide 124-38-9 10,000 18,000 30,000 54,000 — — — Carbon disulfide 75-15-0 4 12 12 36 — — X Carbon monoxide (STEL – 5 630-08-0 35 40 200 229 1500 — — minutes) Carbon tetrabromide 558-13-4 0.1 1.4 0.3 4 — — — Carbon tetrachloride 56-23-5 2 12.6 — — — — — Carbonyl fluoride 353-50-4 2 5 5 15 — — — Catechol (Pyrocatechol) 120-80-9 5 20 — — — — X Cellulose 9004-34-6 Total Dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Cesium hydroxide 21351-79-1 — 2 — — — — — Chlordane 57-74-9 — 0.5 — — — — X Chlorinated camphene 8001-35-2 — 0.5 — 1 — — X Chlorinated diphenyl oxide 55720-99-5 — 0.5 — — — — — Chlorine 7782-50-5 0.5 1.5 1 3 — — — Chlorine dioxide 10049-04-4 0.1 0.3 0.3 0.9 — — — Chlorine trifluoride 7790-91-2 — — — — 0.1 0.4 — Chloroacetaldehyde 107-20-0 — — — — 1 3 — a-Chloroacetophenone (Phenacyl 532-27-4 0.05 0.3 — — — — — chloride) Chloroacetyl chloride 79-04-9 0.05 0.2 — — — — — Chlorobenzene 108-90-7 75 350 — — — — — o-Chlorobenzylidene malononitrile 2698-41-1 — — — — 0.05 0.4 X Chlorobromomethane 74-97-5 200 1050 — — — — — 2-Chloro-1,3-butadiene; see b- Chloroprene Chlorodifluoromethane 75-45-6 1000 3500 — — — — — Chlorodiphenyl (42% Chlorine) 53469-21-9 — 1 — — — — X (PCB) Chlorodiphenyl (54% Chlorine) 11097-69-1 — 0.5 — — — — X (PCB) 1-Chloro,2,3-epoxypropane; see Epichlorohydrin 2-Chloroethanol; see Ethylene chlorohydrin Chloroethylene; see Vinyl chloride FOR GENERAL INDUSTRY Chloroform (Trichloromethane) 67-66-3 2 9.78 — — — — — Bis(Chloromethyl) ether; see 29 542-88-1 CFR 1910.1003 Chloromethyl methyl ether; see 29 107-30-2 CFR 1910.1003 1-Chloro-1-nitropropane 600-25-9 2 10 — — — — — Chloropentafluoroethane 76-15-3 1000 6320 — — — — — Chloropicrin 76-06-2 0.1 0.7 — — — — — Beta-Chloroprene 126-99-8 10 35 — — — — X o-Chlorostyrene 2039-87-4 50 285 75 428 — — — o-Chlorotoluene 95-49-8 50 250 — — — — — 2-Chloro-6-trichloro-methpyridine 1929-82-4 Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Chlorpyrifos 2921-88-2 — 0.2 — — — — X Chromic acid and chromates (as Varies with — — — — — 0.1 — CrO3) compound This standard applies to any operations or sectors for which the exposure limit in the Chromium (VI) standard, § 1910.1026, is stayed or is otherwise not in effect. Chromium, sol chromic, chromous 7440-47-3 — 0.5 — — — — — salts (as Cr) Chromium, metal and insoluble 7440-47-3 — 1 — — — — — Salts Chrysene; see Coal tar pitch volatiles Clopidol 2971-90-6 Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Coal dust (less than 5% SiO2) — — 0.2 — — — — — Respirable fraction Coal dust (greater than or equal to — — 0.1 — — — — — 5% SiO2), Respirable quartz fraction Coal tar pitch volatiles (benzene 65966-93-2 — 0.2 — — — — — soluble fraction), anthrancene, BaP, phenanthrene, acidine, chrysene, pyrene Cobalt metal, dust, and fume (as 7440-48-4 — 0.05 — — — — — Co) Cobalt carbonyl (as Co) 10210-68-1 — 0.1 — — — — — Cobalt hydrocarbonyl (as Co) 16842-03-8 — 0.1 — — — — — Coke oven emissions; see 29 CFR — 1910.1029 Copper 7440-50-8 — — — — — — — Fume (as Cu) — — 0.1 — — — — — Dusts and mists (as Cu) — — 1 — — — — — Cotton dust (raw) — — 1 — — — — — This 8-hour TWA applies to respirable dust as measured by a vertical elutriator cotton dust sampler or equivalent instruction. The time-weighted average applies to the cotton waste processing operations of waste recycling (sorting, blending, cleaning and willowing) and garnetting. See also 29 CFR 1910.1043 for cotton dust limits applicable to other sectors. FOR GENERAL INDUSTRY Crag herbicide (Sesone) 136-78-7 — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Cresol, all isomers 1319-77-3 5 22 — — — — X Crotonaldehyde 123-73-9; 2 6 — — — — — 4170-30-3 Crufomate 299-86-5 — 5 — — — — — Cumene 98-82-8 50 245 — — — — X Cyanamide 420-04-2 — 2 — — — — — Cyanides (as CN) Varies with — 5 — — — — — compound Cyanogen 460-19-5 10 20 — — — — — Cyanogen chloride 506-77-4 — — — — 0.3 0.6 — Cyclohexane 110-82-7 300 1050 — — — — — Cyclohexanol 108-93-0 50 200 — — — — X Cyclohexanone 108-94-1 25 100 — — — — X Cyclohexene 110-83-8 300 1015 — — — — — Cyclohexylamine 108-91-8 10 40 — — — — — Cyclonite 121-82-4 — 1.5 — — — — X Cyclopentadiene 542-92-7 75 200 — — — — — Cyclopentane 287-92-3 600 1720 — — — — — Cyhexatin 13121-70-5 — 5 — — — — — 2,4-D (Dichlorophenoxyacetic acid) 94-75-7 — 10 — — — — — Decaborane 17702-41-9 0.05 0.3 0.15 0.9 — — X Demeton (Systox®) 8065-48-3 — 0.1 — — — — X Dichlorodiphenyltrichloroethane 50-29-3 — 1 — — — — X (DDT) Dichlorvos (DDVP) 62-73-7 — 1 — — — — X Diacetone alcohol (4-Hydroxy-4- 123-42-2 50 240 — — — — — methyl-2-pentanone) 1,2-Diaminoethane; see Ethylenediamine Diazinon 333-41-5 — 0.1 — — — — X Diazomethane 334-88-3 0.2 0.4 — — — — — Diborane 19287-45-7 0.1 0.1 — — — — — 1,2-Dibromo-3-chloropropane; see 96-12-8 29 CFR 1910.1044 2-N-Dibutylaminoethanol 102-81-8 2 14 — — — — — Dibutyl phosphate 107-66-4 1 5 2 10 — — — Dibutyl phthalate 84-74-2 — 5 — — — — — Dichloroacetylene 7572-29-4 — — — — 0.1 0.4 — o-Dichlorobenzene 95-50-1 — — — — 50 300 — p-Dichlorobenzene 106-46-7 75 450 110 675 — — — 3,3'-Dichlorobenzidine; see 29 CFR 91-94-1 1910.1003 Dichlorodifluoromethane 75-71-8 1000 4950 — — — — — 1,3-Dichloro-5,5-dimethyl hydantion 118-52-5 — 0.2 — 0.4 — — — 1,1-Dichlorothane 75-34-3 100 400 — — — — — 1,2-Dichloroethylene 540-59-0 200 790 — — — — — Dichloroethyl ether 111-44-4 5 30 10 60 — — X Dichloromethane; see Methylene chloride Dichloromonofluoro-methane 75-43-4 10 40 — — — — — FOR GENERAL INDUSTRY 1,1-Dichloro-1-nitroethane 594-72-9 2 10 — — — — — 1,2-Dichloropropane; see Propylenedichloride 1,3-Dichloropropene 542-75-8 1 5 — — — — X 2,2-Dichloropropionic acid 75-99-0 1 6 — — — — — Dichlorotetrafluoroethane 76-14-2 1000 7000 — — — — — Dicrotophos 141-66-2 — 0.25 — — — — X Dicyclopentadiene 77-73-6 5 30 — — — — — Dicyclopentadienyl iron 102-54-5 — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Dieldrin 60-57-1 — 0.25 — — — — X Diethanolamine 111-42-2 3 15 — — — — — Diethylamine 109-89-7 10 30 25 75 — — — 2-Diethylaminoethanol 100-37-8 10 50 — — — — X Diethylene triamine 111-40-0 1 4 — — — — — Diethyl ether; see Ethyl ether Diethyl ketone 96-22-0 200 705 — — — — — Diethyl phthalate 84-66-2 — 5 — — — — — Difluorodibromomethane 75-61-6 100 860 — — — — — Diglycidyl ether (DGE) 2238-07-5 0.1 0.5 — — — — — Dihydroxybenzene; see Hydroquinone Diisobutyl ketone 108-83-8 25 150 — — — — — Diisopropylamine 108-18-9 5 20 — — — — X 4-Dimethylaminoazo-benzene; see 60-11-7 — — — — — — — 29 CFR 1910.1003 Dimethoxymethane; see Methytal Dimethyl acetamide 127-19-5 10 35 — — — — X Dimethylamine 124-40-3 10 18 — — — — — Dimethylaminobenzene; see Xylidine Dimethylaniline (N,N-Dimethyl- 121-69-7 5 25 10 50 — — X analine) Dimethylbenzene; see Xylene Dimethyl-1,2-dibromo-2,2- 300-76-5 — 3 — — — — X dichloroethyl phosphate Dimethylformamide 68-12-2 10 30 — — — — X 2,6-Dimethyl-4-hepta-none; see Diisobutyl ketone 1,1-Dimethylhydrazine 57-14-7 0.5 1 — — — — X Dimethylphthalate 131-11-3 — 5 — — — — — Dimethyl sulfate 77-78-1 0.1 0.5 — — — — X Dinitolmide (3,5-Dinitro-o-toluamide 148-01-6 — 5 — — — — — Dinitrobenzene (all isomers) — 1 — — — — X (alpha-) 528-29-0 (meta-) 99-65-0 (para-) 100-25-4 Dinitro-o-cresol 534-52-1 — 0.2 — — — — X Dinitrotoluene 25321-14-6 — 1.5 — — — — X Dioxane (Diethylene dioxide) 123-91-1 25 90 — — — — X Dioxathion (Delnav) 78-34-2 — 0.2 — — — — X Diphenyl (Biphenyl) 92-52-4 0.2 1 — — — — — FOR GENERAL INDUSTRY Diphenylamine 122-39-4 — 10 — — — — — Diphenylmethane diisocyanate; see Methylene bisphenyl isocyanate Dipropylene glycol methyl ether 34590-94-8 100 600 150 900 — — X Diprophy ketone 123-19-3 50 235 — — — — — Diquat 85-00-7 — 0.5 — — — — — Di-sec octyl phthalate (Di-2- 117-81-7 — 5 — 10 — — — ethylhexyl-phthalate) Disulfiram 97-77-8 — 2 — — — — — Disulfoton 298-04-4 — 0.1 — — — — X 2-6Di-tert-butyl-p-cresol 128-37-0 — 10 — — — — — Diuron 330-54-1 — 10 — — — — — Divinyl benzene 1321-74-0 10 50 — — — — — Emery 12415-34-8 — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Endosulfan 115-29-7 — 0.1 — — — — X Endrin 72-20-8 — 0.1 — — — — X Epichlorohdrin 106-89-8 2 8 — — — — X EPN 2104-64-5 — 0.5 — — — — X 1,2-epoxypropane; see Propylene oxide 2-3-Epoxy-1-propanol; see Glydicol Ethanethiol; see Ethy mercaptan Ethanolamine 141-43-5 3 8 6 15 — — — Ethion 563-12-2 — 0.4 — — — — X 2-Ethoxyethanol 110-80-5 200 740 — — — — X 2-Ethoxyethyl acetate (Cellosolve 111-15-9 100 540 — — — — X acetate) Ethyl acetate 141-78-6 400 1400 — — — — — Ethyl acrylate 140-88-5 5 20 25 100 — — X Ethyl alcohol (Ethonal) 64-17-5 1000 1900 — — — — — Ethylamine 75-04-7 10 18 — — — — — Ethyl amyl ketone (5-Methyl-3- 541-85-5 25 130 — — — — — heptanone) Ethyl benzene 100-41-4 100 435 125 545 — — — Ethyl bromide 74-96-4 200 890 250 1110 — — — Ethyl butyl ketone (3-Heptanone) 106-35-4 50 230 — — — — — Ethyl chloride 75-00-3 1000 2600 — — — — — Ethyl ether 60-29-7 400 1200 500 1500 — — — Ethyl formate 109-94-4 100 300 — — — — — Ethyl mercaptan 75-08-1 0.5 1 — — — — — Ethyl silicate 78-10-4 10 85 — — — — — Ethylene chlorohydrin 107-07-3 — — — — 1 3 X Ethylenediamine 107-15-3 10 25 — — — — — Ethylene dibromide (STEL – 5 106-93-4 20 — — 30 — 50 — minutes) Ethylene dichloride 107-06-2 1 4 2 8 — — — Ethylene glycol 107-21-1 — — — — 50 125 — Ethylene glycol dinitrate 628-96-6 — — — 0.1 — — X Ethylene glycol methyl acetate; see Methyl cellosolve acetate Ethyleneimine; see 29 CFR 151-56-4 FOR GENERAL INDUSTRY 1910.1003 Ethylene oxide; see 29 CFR 75-21-8 1910.1047 Ethylidene chloride; see 1,1- Dichloroethane Ethylidene norbormene 16219-75-3 — — — — 5 25 — Nethylmorpholine 100-74-3 5 23 — — — — X Fenamiphos 22224-92-6 — 0.1 — — — — X Fensulfothion (Dasanit) 115-90-2 — 0.1 — — — — — Fenthion 55-38-9 — 0.2 — — — — X Ferbam 14484-64-1 — — — — — — — Total dust — — 10 — — — — — Ferrovanadium dust 12604-58-9 — 1 — 3 — — — Fluorides (as F) Varies with — 2.5 — — — — — compound Fluorine 7782-41-4 0.1 0.2 — — — — — Fluorotrichloromethane 75-69-4 — — — — 1000 5600 — (Trichlorofluoromethane) Fonofos 944-22-9 — 0.1 — — — — X Formaldehyde; see 29 CFR 1910.1048 Formamide 75-12-7 20 30 30 45 — — — Formic acid 64-18-6 5 9 — — — — — Furfural 98-01-1 2 8 — — — — X Furfuryl alcohol 98-00-0 10 40 15 60 — — X Gasoline 8006-61-9 300 900 500 1500 — — — Bermanium tetrahydride 7782-65-2 0.2 0.6 — — — — — Glutaraldehyde 111-30-8 — — — — 0.2 0.8 — Glycerin (mist) 56-81-5 — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Glycidol 556-52-5 25 75 — — — — — Glycol monoethyl ether; see 2- Ethoxyethanol Grain dust (oat, wheat, barley) — — 10 — — — — — Graphite, natural respirable dust 7782-42-5 — 2.5 — — — — — Graphite, synthetic — — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Guthion®; see Azinphos methyl Gypsum 13397-24-5 Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Hafnium 7440-58-6 — 0.5 — — — — — Heptachlor 76-44-8 — 0.5 — — — — X Heptane (n-Heptane) 142-82-5 400 1600 500 2000 — — — Hexaclorobutadiene 87-68-3 0.02 0.24 — — — — — Hexachlorocyclo-pentadiene 77-47-4 0.01 0.1 — — — — — Hexacloroethane 67-72-1 1 10 — — — — X Hexachloronapthalene 1335-87-1 — 0.2 — — — — X Hexafluoroacetone 684-16-2 0.1 0.7 — — — — X n-Hexane 110-54-3 50 180 — — — — — Hexane isomers Varies with 500 1800 1000 3600 — — — FOR GENERAL INDUSTRY compound 2-Hexanone (Methyl n-butyl 591-78-6 5 20 — — — — — ketone) Hexone (Methyl isobutyl ketone) 108-10-1 50 205 75 300 — — sec-Hexyl acetate 108-84-9 50- 300 — — — — — Hexylene glycol 107-41-5 — — — — 25 125 — Hydrazine 302-01-2 0.2 0.1 — — — — X Hydrogenated terphenyls 61788-32-7 0.5 5 — — — — — Hydrogen bromide 10035-10-6 — — — — 3 10 — Hydrogen chloride 7647-01-0 — — — — 5 7 — Hydrogen cyanide 74-90-8 — — 4.7 5 — — X Hydrogen fluoride (as F) 7664-39-3 3 — 6 — — — — Hydrogen peroxide 7722-84-1 1 1.4 — — — — — Hydrogen selenide (as Se) 7783-07-5 0.05 0.2 — — — — — Hydrogen sulfide 7783-06-4 10 14 15 21 — — — Hydroquinone 123-31-9 — 2 — — — — — 2-Hydroxypropyl acrylate 999-61-1 0.5 3 — — — — X Indene 95-13-6 10 45 — — — — — Indium and compounds (as In) 7440-74-6 — 0.1 — — — — — Iodine 7553-56-2 — — — — 0.1 1 — Iodoform 75-47-8 0.6 10 — — — — — Iron oxide fume 1309-37-1 — 10 — — — — — Iron pentacarbonyl (as Fe) 13463-40-6 0.1 0.8 0.2 1.6 — — — Iron salts (soluble) (as Fe) Varies with — 1 — — — — — compound Isoamyl acetate 123-92-2 100 525 — — — — — Isoamyl alcohol (primary and 123-51-3 100 360 125 450 — — — secondary) Isobutyl acetate 110-19-0 150 700 — — — — — Isobutyl alcohol 78-83-1 50 150 — — — — — Isooctyl alcohol 26952-21-6 50 270 — — — — X Isophorone 78-59-1 4 23 — — — — — Isophorone diisocyanate 4098-71-9 0.005 — 0.02 — — — X 2-Isopropoxyethanol 109-59-1 25 105 — — — — — Isopropyl acetate 108-21-4 250 950 310 1185 — — — Isopropyl alcohol 67-63-0 400 980 500 1225 — — — Isopropylamine 75-31-0 5 12 10 24 — — — N-isopropylaniline 768-52-5 2 10 — — — — X Isopropyl ether 108-20-3 500 2100 — — — — — Isopropyl glycidyl ether (IGE) 4016-14-2 50 240 75 360 — — — Kaolin Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Ketene 463-51-4 0.5 0.9 1.5 3 — — — Lead inorganic (as Pb); see 29 CFR 7439-92-1 1910.1025 Limestone 1317-65-3 Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Lindane 58-89-9 — 0.5 — — — — X Lithium hydride 7580-67-8 — 0.025 — — — — — L.P.G. (liquefied petroleum gas) 68476-85-7 1000 1800 — — — — — Magnesite 546-93-0 — — — — — — — FOR GENERAL INDUSTRY Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Magnesium oxide fume 1309-48-4 — — — — — — — Total particulate — — 10 — — — — — Malathion 121-75-5 — — — — — — — Total dust — — 10 — — — — X Maleic anhydride 108-31-6 0.25 1 — — — — — Manganese compounds (as Mn) 7439-96-5 — — — — — 5 — Manganese fume (as Mn) 7439-96-5 — 1 — 3 — — — Manganese cyclopenta-dienyl 12079-65-1 — 0.1 — — — — X tricarbonyl (as Mn) Manganese tetroxide (as Mn) 1317-35-7 — 1 — — — — — Marble 1317-65-3 — — — — — — — Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Mercury (aryl and inorganic) (as 7439-97-6 — — — — — 0.1 X Hg) Mercury (organo) alkyl compounds 7439-97-6 — 0.01 — 0.03 — — X (as Hg) Mercury (vapor) (as Hg) 7439-97-6 — 0.05 — — — — X Mesityl oxide 141-79-7 15 60 25 100 — — — Methacrylic acid 79-41-4 20 70 — — — — X Methanethiol; see Methyl mercapan Methomyl (Lannate) 16752-77-5 — 2.5 — — — — — Methoxychlor 72-43-5 — — — — — — — Total dust — — 10 — — — — — 2-Methoxyethanol; see Methyl cellosolve 4-Methoxyphenol 150-76-5 — 5 — — — — — Methyl acetate 79-20-9 200 610 250 760 — — — Methyl acetylene (Propyne) 74-99-7 1000 1650 — — — — — Methyl acetylene-propadiene — 1000 1800 1250 2250 — — — mixture (MAPP) Methyl acrylate 96-33-3 10 35 — — — — X Methylacrylonitrile 126-98-7 1 3 — — — — X Methylal (Dimethoxy-methane) 109-87-5 100 3100 — — — — — Methyl alcohol 67-56-1 200 260 250 325 — — X Methylamine 74-89-5 10 12 — — — — — Methyl amyl alcohol; see Methyl isobutyl carbinol Methyl n-amyl ketone 110-43-0 100 465 — — — — — Methyl bromide 74-83-9 5 20 — — — — X Methyl butyl ketone; see 2- Hexanone Methyl cellosolve (2- 109-86-4 25 80 — — — — X Methoxyethanol) Methyl cellosolve acetate (2- 110-49-6 25 120 — — — — X Methoxyethyl acetate) Methyl chloride 74-87-3 50 105 100 210 — — — Methyl chloroform (1,1,1- 71-55-6 350 1900 450 2450 — — — Trichloroethane) Methyl 2-cyanoacrylate 137-05-3 2 8 4 16 — — — Methyl cyclohexane 108-87-2 400 1600 — — — — — FOR GENERAL INDUSTRY Methylcyclohexanol 25639-42-3 50 235 — — — — — o-Methylcyclohexanone 583-60-8 50 230 75 345 — — X Methylcyclopentadienyl manganese 12106-13-3 — 0.2 — — — — X tricarbonyl (as Mn) Methyl demeton 8022-00-2 — 0.5 — — — — X 4,4'-Methylene bis (2-chloroaniline 101-14-4 0.02 0.22 — — — — X (MBOCA) Methylene bis (4-cyclohexy- 5124-30-1 — — — — 0.01 0.11 X isocyanate) Methylene chloride; see 29 CFR 75-09-2 — — — — — — — 1910.1052 Methylenedianiline; see 29 CFR 1910.1050 Methyl ethyl ketone peroxide 1338-23-4 — — — — 0.7 5 — (MEKP) Methyl formate 107-31-3 100 250 150 375 — — — Methyl hydrazine (monomethyl 60-34-4 — — — — 0.2 0.35 X hydrazine) Methyl iodide 74-88-4 2 10 — — — — X Methyl isoamyl ketone 110-12-3 50 240 — — — — — Methyl isobutyl carbinol 108-11-2 25 100 40 165 — — X Methyl isobutyl ketone; see Hexone Methyl isocyanate 624-83-9 0.02 0.05 — — — — X Methyl isopropyl ketone 563-80-4 200 705 — — — — — Methyl mercaptan 74-93-1 0.5 1 — — — — — Methyl methacrylate 80-62-6 100 410 — — — — — Methyl parathion 298-00-0 — 0.2 — — — — X Methyl propyl ketone; see 2- Pentanone Methyl silicate 681-84-5 1 6 — — — — — alpha-Methyl styrene 98-83-9 50 240 100 485 — — — Methylene disphenyl isocyanate 101-68-8 — — — — 0.02 0.2 —

   1. (MDI) Metribuzin 21087-64-9 — 5 — — — — — Mica; see Silicates Molybdenum (as Mo) 7439-98-7 Soluble compounds — — 5 — — — — — Insoluble compounds Total dust — — 10 — — — — — Monocrotophos (Azodrin®) 6923-22-4 — 0.25 — — — — — Monomethyl aniline 100-61-8 0.5 2 — — — — X Morpholine 110-91-8 20 70 30 105 — — X Naphtha (Coal tar) 8030-30-6 100 400 — — — — — Naphthalene 91-20-3 10 50 15 75 — — — alpha-Naphthylamine; see 29 CFR 134-32-7 1910.1003 beta-Naphthylamine; see 29 CFR 91-59-8 1910.1003 Nickel carbonyl (as Ni) 13463-39-3 0.001 0.007 — — — — — Nickel, metal and insoluble 7440-02-0 — 1 — — — — — compounds (as Ni) Nickel, soluble compounds (as Ni) 7440-02-0 — 0.1 — — — — — Nicotine 54-11-5 — 0.5 — — — — X FOR GENERAL INDUSTRY Nitric acid 7697-37-2 2 5 4 10 — — — Nitric oxide 10102-43-9 25 30 — — — — — p-Nitroaniline 100-01-6 — 3 — — — — X Nitrobenzene 98-95-3 1 5 — — — — X p-Nitrochlorobenzene 100-00-5 — 1 — — — — x 4-Nitrodiphenyl; see 29 CFR 92-93-3 1910.1003 Nitroethane 79-24-3 100 310 — — — — — Nitrogen dioxide 10102-44-0 — — 1 1.8 — — — Nitrogen trifluoride 7783-54-2 10 29 — — — — — Nitroglycerinl 55-63-0 — — — 0.1 — — X Nitromethane 75-52-5 100 250 — — — — — 1-Nitropropane 108-03-2 25 90 — — — — — 2-Nitropropane 79--46-9 10 35 — — — — — N-Nitrosodimethylamine; see 29 62-79-9 CFR 1910.1016 Nitrotoluene o-isomer 88-72-2 2 11 — — — — X m-isomer 99-08-1 2 11 — — — — X p-isomer 99-99-0 2 11 — — — — X Nitrotrichloromethane; see Chloropicin Nonane 111-84-2 200 1050 — — — — — Octachloronaphthalene 2234-13-1 — 0.1 — 0.3 — — X Octane 111-65-9 300 1450 375 1800 — — — Oil mist, mineral 8012-95-1 — 5 — — — — — Osmium tetroxide (as Os) 20816-12-0 0.0002 0.002 0.0006 0.006 — — — Oxalic acid 144-62-7 — 1 — 2 — — — Oxygen difluoride 7783-41-7 — — — — 0.05 0.1 — Ozone 10028-15-6 0.1 0.2 0.3 0.6 — — — Paraffin wax fume 8002-74-2 — 2 — — — — — Paraquat, respirable dust 1910-42-5 — 0.1 — — — — X 4685-14-7 2074-50-2 Parathion 5838-2 — 0.1 — — — — X Particulates not otherwise regulated Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Pentaborane 19624-22-7 0.005 0.01 0.015 0.03 — — — Pentachloronaphthalene 1321-64-8 — 0.5 — — — — X Pentachlorophenol 87-86-5 — 0.5 — — — — X Pentaerythirtol 115-77-5 — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Pentane 109-66-0 600 1800 750 2250 — — — 2-Pentanone (Methyl propyl 107-87-9 200 700 250 875 — — — ketone) Perchloroethylene 127-18-4 25 170 — — — — — (Tetrachloroethylene) Perchloromethyl mercaptan 594-42-3 0.1 0.8 — — — — — Perchloryl fluoride 7616-94-6 3 14 6 28 — — — Perlitte Total dust — — 15 — — — — — FOR GENERAL INDUSTRY Respirable fraction — — 5 — — — — — Petroleum distillates (Naphtha) — 400 1600 — — — — — (Rubber Solvent) Phenol 108-95-2 5 19 — — — — X Phenothiazine 92-84-2 — 5 — — — — X p-Phenylene diamine 106-50-3 — 0.1 — — — — X Phenyl ether, vapor 101-84-8 1 7 — — — — — Phenyl ether-biphenyl mixture, — 1 7 — — — — — vapor Phenylethylene; see Styrene Phenyl glycidyl ether (PGE) 122-60-1 1 6 — — — — — Phenylhydrazine 100-63-0 5 20 10 45 — — X Phenyl mercaptan 108-98-5 0.5 2 — — — — — Phenylphosphine 638-21-1 — — — — 0.05 0.25 — Phorate 298-02-2 — 0.05 — 0.2 — — X Phosdrin (Mevinphos®) 7786-34-7 0.01 0.1 0.03 0.3 — — X Phosgene (Carbonyl chloride) 75-44-5 0.1 0.4 — — — — — Phosphine 7803-51-2 0.3 0.4 1 1 — — — Phosphoric acid 7664-38-2 — 1 — 3 — — — Phosphorus (yellow) 7723-14-0 — 0.1 — — — — — Phosphorus oxychloride 10025-87-3 0.1 0.6 — — — — — Phosphorus pentachloride 10026-13-8 — 1 — — — — — Phosphorus pentasulfide 1314-80-3 — 1 — 3 — — — Phosphorus trichloride 7719-12-2 0.2 1.5 0.5 3 — — — Phthalic anhydride 85-44-9 1 6 — — — — — m-Phthalodinitrile 626-17-5 — 5 — — — — — Picloram 1918-02-1 — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Picric acid 88-89-1 — 0.1 — — — — x Piperazine dihydro-chloride 142-64-3 — 5 — — — — — Pindone (2-Pivalyl-1,3-indandione) 83-26-1 — 0.1 — — — — — Plaster of Paris 26499-65-0 — — — — — — — Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Platinum (as Pt) 7440-06-4 — — — — — — — Metal — — 1 — — — — — Soluble salts — — 0.002 — — — — — Portland cement 65997-15-1 — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Potassium hydroxide 1310-58-3 — — — — — 2 — Propane 74-98-6 1000 1800 — — — — — Propargl alcohol 107-19-7 1 2 — — — — X beta-Propriolactone; see 29 CFR 57-57-8 1910.1013 Propionic acid 79-09-4 10 30 — — — — — Propoxur (Baygon) 114-26-1 — 0.5 — — — — — n-Propyl acetate 109-60-40 200 840 250 1050 — — — n-Propyl alcohol 71-23-8 200 500 250 625 — — — n-Propyl nitrate 627-13-4 25 105 40 170 — — — Propylene dichloride 78-87-5 75 360 110 510 — — — Propylene glycol dinitrate 6423-43-4 0.05 0.3 — — — — — FOR GENERAL INDUSTRY Propylene glycol monomethyl ether 107-98-2 100 380 150 540 — — — Propylene imine 75-55-8 2 5 — — — — X Propylene oxide 75-56-9 20 50 — — — — — Propyne; see Methyl acetylene Pyrethrum 8003-34-7 — 5 — — — — — Pyridine 110-86-1 5 15 — — — — — Quinone 106-51-4 0.1 0.4 — — — — — Resorcinol 108-46-3 10 45 20 90 — — — Rhodium (as Rh), metal fume and 7440-16-6 — 0.1 — — — — — insoluble compounds Rhodium (as Rh), soluble 744-16-6 — 0.001 — — — — — compounds Ronnel 299-84-3 — 10 — — — — — Rosin core solder pyrolysis — — 0.1 — — — — — products, as formaldehyde Rotenone 83-79-4 — 5 — — — — — Rouge Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Selenium compounds (as Se) 7782-49-2 — 0.2 — — — — — Selenium hexafluoride (as Se) 7783-79-1 0.05 0.4 — — — — — Silica, amorphous, precipitated and 112926-00-8 — 6 — — — — — gel Silica, amorphous, diatomaceous 61790-53-2 — 6 — — — — — earth, containing less than 1% crystaline silica Silica, crystaline cristobalite, 14464-46-1 — — — — — — — respirable dust; see 29 CFR 1910.1053 Silica, crystaline quartz, respirable 14808-60-7 — — — — — — — dust; see 29 CFR 1910.1053 Silica, crystaline tripoli (as quartz), 1317-95-9 — — — — — — — respirable dust; see 29 CFR 1910.1053 Silica, crystaline tridmite, respirable 15468-32-3 — — — — — — — dust; see 29 CFR 1910.1053 Silica, fused, respirable dust 60676-86-0 — 0.1 — — — — — Silicates (less than 1% (crystaline silica)) Mica (respirable dust) 12001-26-2 — 3 — — — — — Soapstone, total dust — — 6 — — — — — Soapstone, respirable dust — — 3 — — — — — Talc (containing asbestos); use asbestos limit See 29 CFR 1910.1001 Talc (containing no asbestos); 14807-96-6 — 2 — — — — — Respirable dust Tremolite (use asbestos limit); See 29 CFR 1910.1001 Silicon 7440-21-3 Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Silicon carbide 409-21-2 FOR GENERAL INDUSTRY Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Silicon tetrahydride 7803-62-5 5 7 — — — — — Silver, metal and soluble 7440-22-4 — 0.01 — — — — — compounds (as Ag) Soapstone; see Silicates Sodium azide 26628-22-8 (as HN3) — — — — — 0.1 — X (as NaN3) — — — — — — 0.3 X Sodium bisulfite 7631-90-5 — 5 — — — — — Sodium fluoroacetate 62-74-8 — 0.05 — 0.15 — — X Sodium hydroxide 1310-73-2 — — — — — 2 — Sodium metabisulphite 7681-57-4 — 5 — — — — — Starch 9005-25-8 Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Stibine 7803-52-3 0.1 0.5 — — — — — Stoddard solvent 8052-41-3 100 525 — — — — — Strychnine 57-24-9 — 0.15 — — — — — Styrene 100-42-5 50 215 100 425 — — — Subtilisins (Protolytic enzymes) 9014-01-1 — — — 0.00006 — — — sample 600-800 lpm for at least 60 minutes Sucrose 57-50-1 — — — — — — — Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Sulfur dioxide 7446-09-5 2 5 5 10 — — — Sulfur hexafluoride 2551-62-4 1000 6000 — — — — — Sulfuric acid 7664-93-9 — 1 — — — — — Sulfur monochloride 10025-67-9 — — — — 1 6 — Sulfur pentafluoride 5714-22-7 — — — — 0.01 0.1 — Sulfur tetrafluoride 7783-60-0 — — — — 0.1 0.4 — Sulfuryl fluoride 2699-79-8 5 20 10 40 — — — Sulprofos 35400-43-2 — 1 — — — — — Systox®; see Demeton 2,4,5-T 93-76-5 — 10 — — — — — Talc; see Silicates Tantalum, metal and oxide dust 7440-25-7 — 5 — — — — — TEDP (Sulfotep) 3689-24-5 — 0.2 — — — — X Tellurium and compounds (as Te) 13494-80-9 — 0.1 — — — — — Tellurium hexafluoride (as Te) 7783-80-4 0.02 0.2 — — — — — Temephos 3383-96-8 Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — TEPP 107-49-3 — 0.05 — — — — X Terphenyls 26140-60-3 — — — — 0.5 5 — 1,1,1,2-Tetrachloro-2,2- 76-11-9 500 4170 — — — — — difluoroethane 1,1,2,2-Tetrachloro-1,2- 76-12-0 500 4170 — — — — — difluoroethane 1,1,2,2-Tetrachloroethane 79-34-5 1 7 — — — — X Tetrachoroethylene; see Perchloroethylene FOR GENERAL INDUSTRY Tetrachloromethane; see Carbon tetrachloride Tetrachloronaphthalene 1335-88-2 — 2 — — — — X Tetraethyl lead (as Pb) 78-00-2 — 0.075 — — — — X Tetrahydrofuran 109-99-9 200 590 250 735 — — — Tetramethyl lead, (as Pb) 75-74-1 — 0.75 — — — — X Tetramethyl succinonitrile 3333-52-6 0.5 3 — — — — X Tetranitromethane 509-14-8 1 8 — — — — — Tetrasodium pyrophosphate 7722-88-5 — 5 — — — — — Tetryl (2,4,6-Trinitrophenyl-methyl- 479-45-8 — 1.5 — — — — X nitramine) Thalium, Soluble compounds (as Tl) 7440-28-0 — 0.1 — — — — X 4,4'-Thiobis(6-tert, Butyl-m-cresol) 96-69-5 — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Thioglycolic acid 68-11-1 1 4 — — — — X Thionyl chloride 7719-09-7 — — — — 1 5 — Thiram 137-26-8 — 5 — — — — — Tin, inorganic compounds (except 7440-31-5 — 2 — — — — — oxides) (as Sn) Tin, organic compounds (as Sn) 7440-31-5 — 0.1 — — — — X Tin oxide (as Sn) 21651-19-4 — 2 — — — — — Titanium dioxide 13463-67-7 — — — — — — — Total dust — — 10 — — — — — Toluene 108-88-3 100 375 150 580 — — — Toluene-2,4-diisocynate (TDI) 584-84-9 0.005 0.04 0.02 0.15 — — — m-Toluidine 108-44-1 2 9 — — — — X o-Toluidine 95-53-4 5 22 — — — — X p-Toluidine 106-49-0 2 9 — — — — X Toxaphene; see Chlorinated camphene Tremolite; see Silicates Tributyl phosphate 126-73-8 0.2 2.5 — — — — — Trichloroacetic acid 76-03-9 1 7 — — — — — 1,2,4-Trichlorobenzene 120-82-1 — — — — 5 40 — 1,1,1-Trichloroethane; see Methyl chloroform 1,1,2-Trichloroethane 79-00-5 10 45 — — — — X Trichloroethylene 79-01-6 50 270 200 1080 — — — Trichloromethane; see Chloroform Trichloronaphthalene 1321-65-9 — 5 — — — — X 1,2,3-Trichloropropane 96-18-4 10 60 — — — — — 1,1,2-Trichloro-1,2,2-trifluoroethane 76-13-1 1000 7600 1250 9500 — — — Triethylamine 121-44-8 10 40 15 60 — — — Trifluorobromomethane 75-63-8 1000 6100 — — — — — Trimellitic anhydride 552-30-7 0.005 0.04 — — — — — Trimethylamine 75-50-3 10 24 15 36 — — — Trimethyl benzene 25551-13-7 25 125 — — — — — Trimethyl phosphite 121-45-9 2 10 — — — — — 2,4,6-Trinitrophenyl; see Picric acid 2,4,6-Trinitrophenylmethyl nitamine; see Tetryl 2,4,6-Trinitrotoluene (TNT) 118-96-7 — 0.5 — — — — X FOR GENERAL INDUSTRY Triorthocresyl phosphate 78-30-8 — 0.1 — — — — X Triphenyl amine 603-34-9 — 5 — — — — — Triphenyl phosphate 115-86-6 — 3 — — — — — Tungsten (as W) 7440-33-7 — — — — — — — Insoluble compounds — — 5 — 10 — — — Soluble compounds — — 1 — 3 — — — Turpentine 8006-64-2 100 560 — — — — — Uranium (as U) 7440-61-1 — — — — — — — Soluble compounds — — 0.05 — — — — — Insoluble compounds — — 0.2 — 0.6 — — — n-Valeraldehyde 110-62-3 50 175 — — — — — Vanadium fume and 1314-62-1 — — — — — — — Respirable dust (as V2O5) — — 0.05 — — — — — Vegetable oil mist — Total dust — — 15 — — — — — Respirable fraction — — 5 — — — — — Vinyl acetate 108-05-4 10 30 20 60 — — — Vinyl benzene; see Styrene Vinyl bromide 593-60-2 5 20 — — — — — Vinyl chloride; see 29 CFR 75-01-4 — — — — — — — 1910.1017 Vinyl cyanide; see Acrylonitrile Vinyl cyclohexene dioxide 106-87-6 10 60 — — — — X Vinylidene chloride (1,1-Dichloro- 75-35-4 1 4 — — — — — ethylene) Vinyl toluene 24994 100 480 — — — — — VM & P Naphtha 8032-32-4 300 1350 400 1800 — — — Warfarin 81-81-2 — 0.1 — — — — — Welding fumes (total particulate) — — 5 — — — — — Wood dust, all soft and hard woods, — — 5 — 10 — — — except Western red cedar Wood dust, Western red cedar — — 2.5 — — — — — Xylenes (o-, m-, p-isomers) 1330-20-7 100 435 150 655 — — — m-Xylene alpha, alpha-diamine 1477-55-0 — — — — — 0.1 X Xylidine 1300-73-8 2 10 — — — — X Yttrium 7440-65-5 — 1 — — — — — Zinc chloride fume 7646-85-7 — 1 — 2 — — — Zinc oxide fume 1314-13-2 — 5 — 10 — — — Zinc oxide 1314-13-2 — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Zinc stearate 557-05-1 — — — — — — — Total dust — — 10 — — — — — Respirable fraction — — 5 — — — — — Zirconium compounds (as Zr) 7440-67-7 — 5 — 10 — — —

Authority: T.C.A. §§ 4-3-1411, 50-3-105, 50-3-201, and 50-3-202. Administrative History: Original rule filed January 15, 1977; effective February 13, 1977. Repeal and new rule filed September 15, 1977; effective October 14, 1977. Repeal and new rule filed March 31, 1983; effective June 15, 1983. Repeal and new rule filed August 13, 1999; effective December 29, 1999. Repeal and new rule filed January 11, 2002; effective May 31, 2002. Amendment filed April 21, 2004; effective August 27, 2004. Amendment filed November 16, 2006; effective date March 30, 2007. Amendments filed May 7, 2018; effective August FOR GENERAL INDUSTRY 5, 2018. Amendments filed April 27, 2021; effective July 26, 2021. Amendments filed February 17, 2023; effective May 18, 2023.