Cal. Code Regs. Tit. 8, § 5155 - Airborne Contaminants
(a)
Scope and Application.
(1) This section
establishes requirements for controlling employee exposure to airborne
contaminants and skin contact with those substances which are readily absorbed
through the skin and are designated by the "S" notation in Table AC-1 at all
places of employment in the state.
(2) When this section references another
section for controlling employee exposures to a particular airborne
contaminant, the provisions of this section for such substance shall apply only
to those places of employment which are exempt from the other standard.
EXCEPTION: The provisions for strontium chromate contained in this section shall continue to apply in all workplaces and shall be in addition to the requirements stated in Sections 1532.2, 5206, and 8359.
Note: Table AC-1 of this section presents concentration limits for airborne contaminants to which nearly all workers may be exposed daily during a 40-hour workweek for a working lifetime without adverse effect. Because of some variation in individual susceptibility, an occasional worker may suffer discomfort, aggravation of a pre-existing condition, or occupational disease upon exposure to concentrations even below the values specified in these tables. The exposure limits established by this section reflect current medical opinion and industrial hygiene practice, doubts being resolved on the side of safety, and are intended to be used in accordance with good industrial hygiene practice by qualified persons. The division recognizes the need for almost continuous review of these concentration limits and also anticipates the need for including new or additional substances. Harmful exposure to any substances not listed in this section shall be controlled in accordance with section 5141.
(b) Definitions.
Ceiling Limit. The maximum concentration of an airborne contaminant to which an employee may be exposed at any time.
Eight-Hour Time-Weighted Average Concentration (TWA). An employee's exposure, as measured or calculated by the formula in Appendix A, to an airborne contaminant during a workday.
Permissible Exposure Limit (PEL). The maximum permitted 8-hour time-weighted average concentration of an airborne contaminant.
Short Term Exposure Limit (STEL). A 15-minute time-weighted average exposure which is not to be exceeded at any time during a workday even if the 8-hour time-weighted average is below the PEL. An averaging period other than 15 minutes may be specified in the footnotes at the end of Table AC-1.
(c) Exposure
Limits.
(1) Permissible Exposure Limits
(PELs).
(A) An employee exposure to an
airborne contaminant in a workday, expressed as an 8-hour TWA concentration,
shall not exceed the PEL specified for the substance in Table AC-1.
(B) When substances have additive health
effects as described in section (B) of the Appendix to section
5155, the value of D shall not
exceed unity.
(2) Short
Term Limits.
(A) Short Term Exposure Limit.
An employee exposure to an airborne contaminant, expressed as a 15-minute
time-weighted average concentration, shall not exceed the STEL specified for
the substance in Table AC-1 at any time during the workday. If another
averaging period is indicated in the footnotes to Table AC-1, the time-weighted
average exposure over that time period shall not exceed the specified STEL at
any time during the workday.
(B)
All Other Substances Without a Ceiling Limit. Employee exposure to
concentrations above the PEL shall be controlled so as to prevent harmful
effects such as narcosis, significant irritation of the eyes, skin or
respiratory tract, or chronic or irreversible tissue change.
Note: Such substances are not known to cause adverse effects if the maximum concentration of exposure is limited in accordance with the following guidelines.
| PEL Value* | Multiplication Factor |
| (From Table AC-1) | For Maximum Concentration |
| 0 to 1 | 3 |
| >1 to 10 | 2 |
| >10 | 1.5 |
* Use ppm value unless the concentration is only expressed in mg/M3
(3) Ceiling Limits. Employee exposures shall
be controlled such that the applicable ceiling limit specified in Table AC-1
for any airborne contaminant is not exceeded at any time.
(d) Skin Notation and Protective Clothing.
The substances designated by "S" in the skin notation column of Table AC-1 may
be absorbed into the bloodstream through the skin, the mucous membranes and/or
the eye, and contribute to the overall exposure. Appropriate protective
clothing shall be provided for and used by employees as necessary to prevent
skin absorption.
Note: The above requirement does not remove the employer's responsibility to provide appropriate protection from corrosive or skin irritating materials which may not bear the "S" designation.
(e) Workplace
Monitoring.
(1) Whenever it is reasonable to
suspect that employees may be exposed to concentrations of airborne
contaminants in excess of levels permitted in section
5155(c), the
employer shall monitor (or cause to have monitored) the work environment so
that exposures to employees can be measured or calculated.
(2) When exposures to airborne contaminants
are found or are expected to exceed allowable levels, measures to control such
harmful exposures shall be instituted in accordance with section
5141.
(3) For the adequate protection of employees,
the person supervising, directing or evaluating the monitoring and control
methods shall be versed in this standard and shall be competent in industrial
hygiene practice.
Note: To facilitate the detection of conditions leading to serious overexposures, the screening of the work environment by any person authorized by the employer, using appropriate measuring devices, is encouraged.
(4) All monitoring results shall be recorded
and such records shall be retained in accordance with section
3204.
(f) Medical Surveillance. A medical
surveillance program approved by the division may be required to ensure
satisfactory maintenance of employee health and to ascertain the effectiveness
of the control method(s).Appendix to Section
5155
(A) Computation for Exposures to Contaminants
with Independent Health Effects.
The 8-hour time-weighted average concentration (TWA) of a single substance to which an individual is exposed during a workday shall be calculated using the following formula to determine compliance with the PEL specified in Table AC-1.
| C1T1 + C2T2+ ... CnTn | ||
| TWA = | ___________________________ | , |
| 8* |
where T is the duration in hours of the exposure to a substance at the concentration C. For multiple substances with independent health effects, an independent comparison of each TWA with the corresponding PEL shall be made to determine compliance.
*Note: Eight (8) is used as denominator regardless of total hours of workday.
EXAMPLE: To illustrate the use of this formula, assume Substance A has an 8-hour time weighted average permissible exposure limit of 100 ppm noted in Table AC-1 and an employee is exposed to an airborne concentration of Substance A of 150 ppm for 2 hours, 75 ppm for 3 hours, and 50 ppm for 4 hours during a 9-hour workday:
TWA = [(150 x 2) + (75 x 3) + (50 x 4)]/8* = 91 ppm.
The series of exposures in this example are equivalent to an 8-hour exposure at a concentration of 91 ppm which is below the PEL value of 100 ppm specified for Substance A.
(B) Computation for Exposures to Contaminants
with Additive Health Effects.
In the absence of information to the contrary, the adverse health effects of exposure to two or more toxic materials during the workday shall be considered additive and the following formula shall be used for calculating D, the fraction of the allowable daily exposure.
| TWA1 | TWA2 | TWAn | ||||
| D = | ___________________________ | + | ___________________________ | + ... | ___________________________ | |
| PEL1 | PEL2 | PELn |
where TWA is the time-weighted average concentration of a particular substances involved in the exposure (as calculated by the formula in Section (A) of this Appendix), and PEL is the corresponding permissible exposure limit for that substance as specified by Table AC-1. The value of D shall not exceed unity.
EXAMPLE: To illustrate the use of this formula, consider the following exposures:
| Substance | Actual 8-hour time weighted average (TWA) exposure concentration (ppm) | 8-hour time weighted average permissible exposure limit (PEL) (ppm) | |
| 1 | 500 | 1,000 | |
| 2 | 45 | 200 | |
| 3 | 40 | 200 | |
Substituting in the formula was have
| 500 | 45 | 40 | ||||
| D = | ___________________________ | + | ___________________________ | + | ___________________________ | = 0.925 |
| 1000 | 200 | 200 |
Since D is less than unity (1), the exposure to multiple contaminants is within acceptable limits.
Health effects for multiple contaminants are not considered additive when different organs of the body are affected by individual substances, or where the same effect (such as narcosis) is produced by two substances but the PEL for one substance is based on another effect. For example, vinyl chloride and toluene can both cause narcotic effects, however, the PEL for vinyl chloride is established to protect against cancer while the PEL for toluene is established to protect against non-carcinogenic effects.
TABLE AC-1PERMISSIBLE EXPOSURE LIMITS FOR CHEMICAL CONTAMINANTS
| Chemical Abstracts Registry | PEL(d) | STEL(o) | |||||
| Number(a) | Skin(b) | Name(c) | ppm(e) | mg/M3(f) | Ceiling(g) | ppm(e) | mg/M3(f) |
| 75070 | Acetaldehyde | 25 | 45 | C | |||
| 64197 | Acetic acid | 10 | 25 | 40 ppm | 15 | 37 | |
| 108247 | Acetic Anhydride | 5 | 20 | C | |||
| 67641 | Acetone | 500 | 1200 | 3000 ppm | 750 | 1780 | |
| 75865 | Acetone cyanohydrin as CN | 4.7 | 5 | C | |||
| 75058 | S | Acetonitrile | 40 | 70 | 60 | 105 | |
| 98862 | Acetophenone | 10 | 49 | ||||
| 53963 | S | 2-Acetylaminofluorene; N-fluoren-2-yl acetamide; see Section 5209 | |||||
| 74862 | Acetylene | (h) | |||||
| 540590 | Acetylene dichloride; see 1,2-Dichloroethylene | ||||||
| 79276 | Acetylene tetrabromide: 1,1,2,2-tetrabromoethane | 1 | 14 | ||||
| 79345 | Acetylene tetrachloride; see 1,1,2,2-Tetrachloroethane | ||||||
| 50782 | Acetylsalicylic acid (Aspirin) | -- | 5 | ||||
| 107028 | S | Acrolein | 0.1 | 0.25 | C | ||
| 79061 | S | Acrylamide | -- | 0.03 | |||
| 79107 | S | Acrylic acid | 2 | 5.9 | |||
| 107131 | S | Acrylonitrile; see Section 5213 | 2 | 4.5 | |||
| 124049 | Adipic acid | -- | 5 | ||||
| 111693 | S | Adiponitrile | 2 | 8.8 | |||
| 309002 | S | Aldrin; 1,2,3,4,10,10-hexachloro-1,4,4a,5,8,8a-hexahydro-endo-1,2-exo-5,8-dimethanonaphthalene | -- | 0.25 | |||
| 107186 | S | Allyl alcohol | 0.5 | 1.25 | 4 | 10 | |
| 107051 | Allyl chloride | 1 | 3 | 2 | 6 | ||
| 106923 | S | Allyl glycidyl ether; AGE | 0.2 | 0.93 | |||
| 2179591 | Allyl propyl disulfide | 2 | 12 | 3 | 18 | ||
| 1344281 | Alumina; see Particulates not otherwise regulated | ||||||
| Aluminum, alkyls (not otherwise classified) | -- | 2 | |||||
| Aluminum soluble salts | -- | 2 | |||||
| Aluminum metal and oxide | -- | ||||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5(n) | |||||
| Aluminum pyro powders | -- | 5 | |||||
| Aluminum welding fumes | -- | 5 | |||||
| 300925 | Aluminum distearate | -- | 10 | ||||
| 7047849 | Aluminum stearate | -- | 10 | ||||
| 637127 | Aluminum tristearate | -- | 10 | ||||
| 1300738 | Aminodimethylbenzene; see Xylidene | ||||||
| 92671 | S | 4-Aminodiphenyl; see Section 5209 | |||||
| 141435 | 2-Aminoethanol; see Ethanolamine | ||||||
| 91598 | 2-Aminonapthalene; see beta-Naphthylamine, Section 5209 | ||||||
| 504290 | 2-Aminopyridine | 0.5 | 2 | ||||
| 61825 | Amitrole | -- | 0.2 | ||||
| 7664417 | Ammonia | 25 | 18 | 35 | 27 | ||
| 3825261 | S | Ammonium perfluorooctanoate | -- | 0.01 | |||
| 12125029 | Ammonium chloride fume | -- | 10 | -- | 20 | ||
| 1002897 | Ammonium stearate | -- | 10 | ||||
| 7773060 | Ammonium sulfamate | -- | |||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| 620111 | 3-Amyl acetate; see Pentyl acetate | ||||||
| 628637 | n-Amyl acetate; see Pentyl acetate | ||||||
| 626380 | sec-Amyl acetate (all isomers and mixtures); see Pentyl acetate | ||||||
| 625161 | tert-Amyl acetate; see Pentyl acetate | ||||||
| 62533 | S | Aniline | 2 | 7.6 | |||
| 29191524 | S | Anisidine (ortho and para isomers) | 0.1 | 0.5 | |||
| Antimony and compounds, as Sb | -- | 0.5 | |||||
| 86884 | ANTU; 1-(1-naphthyl)-2-thiourea; Bantu; Rattrack | -- | 0.3 | ||||
| 7440371 | Argon | (h) | |||||
| 7440382 | Arsenic and inorganic arsenic compounds; see also Section 5214 | 0.01 | |||||
| Arsenic, organic compounds, as As | -- | 0.2 | |||||
| 7784421 | Arsine; AsH$3 | 0.05 | 0.2 | ||||
| 1332-21-4 | Asbestos (including actinolite, amosite anthophyllite, chrysotile, crocidolite, and tremolite); see Section 5208 | ||||||
| 8052424 | Asphalt (petroleum) fumes | -- | 5 | ||||
| 1912249 | Atrazine | -- | 5 | ||||
| 86500 | S | Azinphos methyl; o,o-dimethyl S-(4-oxo-1,2,3-benzotriazin-3(4H)-ylmethyl) phosphorodithioate | -- | 0.2 | |||
| 3333526 | S | 2,2'-Azobisisobutyronitrile decomposition product, see Tetramethyl succinonitrile | |||||
| 7440393 | Barium, soluble compounds, as Ba | -- | 0.5 | ||||
| 7727437 | Barium sulfate; see Particulates not otherwise regulated | ||||||
| 17804352 | Benomyl | ||||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| 71432 | S | Benzene; see also Section 5218 | 1 | 5 | -- | ||
| 92875 | S | Benzidine; 4,4'-diaminobiphenyl, see Section 5209 | |||||
| 71432 | Benzol; see Benzene | ||||||
| 106514 | D-Benzoquinone; see Quinone | ||||||
| 98884 | Benzoyl chloride | 0.2 | 1.1 | C | |||
| 94360 | Benzoyl peroxide; dibenzoyl peroxide | -- | 5 | ||||
| 140114 | Benzyl acetate | 10 | 61 | ||||
| 100447 | benzyl chloride; alpha-chlorotoluene | 0.03 | 0.16 | ||||
| 7440417 | Beryllium, and beryllium compounds | -- | 0.0002 | 0.025mg/M3 | -- | 0.002 | |
| as Be (see also Sections 1535.1, 5205 and 8359.1) | |||||||
| 92524 | Biphenyl; diphenyl; phenylbenzene | 0.2 | 1.5 | ||||
| 542881 | Bis(chloromethyl) ether, see bis-Chloromethyl ether, Section 5209 | ||||||
| 3033623 | S | Bis (Dimethylaminoethyl) ether (DMAEE) | 0.05 | 0.328 | 0.15 | 0.983 | |
| 1304821 | Bismuth telluride | ||||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| Bismuth telluride (selenium-doped) | -- | 5 | |||||
| Borates, tetra, sodium salts | |||||||
| Anhydrous | -- | 5 | |||||
| Decahydrate | -- | 5 | |||||
| Pentahydrate | -- | 5 | |||||
| 1303862 | Boron oxide | -- | 10 | ||||
| 10294334 | Boron tribromide | 1 | 10 | C | |||
| 7637072 | Boron trifluoride | 1 | 3 | C | |||
| 314409 | Bromacil | 1 | 10 | ||||
| 7726956 | Bromine | 0.1 | 0.7 | C | |||
| 7789302 | Bromine pentafluoride | 0.1 | 0.7 | ||||
| 74975 | Bromochloromethane; see Chlorobromethane | ||||||
| 74964 | Bromoethane; see Ethyl bromide | ||||||
| 75252 | S | Bromoform; tribromomethane | 0.5 | 5 | |||
| 74839 | Bromomethane, see Methyl bromide | ||||||
| 106945 | S | 1-bromopropane, n-propyl bromide | 5 | 25 | |||
| 75638 | Bromotrifluoromethane; see Trifluorobromomethane | ||||||
| 106990 | 1,3-Butadiene (see also section 5201) | 1 | 2.2 | 5 | 11 | ||
| 106978 | Butane | 800 | 1,900 | ||||
| 109795 | 1-Butanethiol; see Butyl mercaptan | ||||||
| 71363 | 1-Butanol; see n-Butyl alcohol | ||||||
| 78933 | 2-Butanone; see Methyl ethyl ketone | ||||||
| 111762 | S | 2-Butoxyethanol (EGBE) | 20 | 97 | |||
| 123864 | n-Butyl acetate | 150 | 710 | 200 | 950 | ||
| 105464 | sec-Butyl acetate | 200 | 950 | ||||
| 540885 | tert-Butyl acetate | 200 | 955 | ||||
| 141322 | Butyl acrylate | 2 | 11 | ||||
| 71363 | S | n-Butyl alcohol; 1-butanol | 50 | 150 | C | ||
| 78922 | sec-Butyl alcohol | 100 | 305 | ||||
| 75650 | tert-Butyl alcohol | 100 | 300 | 150 | 450 | ||
| 109739 | S | Butylamine | 5 | 15 | C | ||
| 1189851 | S | tert-Butyl chromate; di-tert-butyl Chromate, as CrO$3 | -- | 0.1 | C | ||
| as Cr | 0.005 | ||||||
| (see also Sections 1532.2, 5206 & 8359) | |||||||
| 2426086 | n-Butyl glycidyl ether; BGE; 1-butoxy-2,3-epoxypropane | 25 | 135 | ||||
| 138227 | n-Butyl lactate | 5 | 25 | ||||
| 109795 | n-Butyl mercaptan | 0.5 | 1.5 | ||||
| 89725 | S | o-sec-Butylphenol | 5 | 30 | |||
| 98511 | p-tert-Butyltoluene | 1 | 6.1 | 20 | 120 | ||
| 7440439 | Cadmium metal dust, as Cd | ||||||
| (see also Sections 1532 & 5207) | -- | 0.005 | |||||
| Cadmium, soluble salts, as Cd | |||||||
| (see also Sections 1532 & 5207) | -- | 0.005 | |||||
| 1306190 | Cadmium oxide fume, as Cd | ||||||
| (see also Sections 1532 & 5207) | -- | 0.005 | |||||
| 7778441 | Calcium arsenate; see Arsenic, inorganic (see also Section 5214) | ||||||
| 471341 | Calcium carbonate; see Particulates not otherwise regulated | -- | |||||
| 156627 | Calcium cyanamide | -- | 0.5 | ||||
| 1305620 | Calcium hydroxide | -- | 5 | ||||
| 1305788 | Calcium oxide | -- | 2 | ||||
| Calcium silicate; see Particulates not otherwise regulated | |||||||
| 1344952 | Calcium silicate (synthetic): see Particulates not otherwise regulated | ||||||
| 1592230 | Calcium stearate | -- | 10 | ||||
| 7778189 | Calcium sulfate; see Particulates not otherwise regulated | ||||||
| 76222 | Camphor (synthetic) | -- | 2 | ||||
| 105602 | Caprolactam dust | -- | 1 | -- | 3 | ||
| 105602 | Caprolactam vapor | 5 | 20 | 10 | 40 | ||
| 2425061 | S | Captafol | -- | 0.1 | |||
| 133062 | Captan | -- | 5 | ||||
| 63252 | Carbaryl; 1-naphthyl N-methylcarbamate | -- | 5 | ||||
| 1563662 | Carbofuran | -- | 0.1 | ||||
| 1333864 | Carbon black | -- | 3.5 | ||||
| 124389 | Carbon dioxide | 5,000 | 9,000 | 30,000 | 54,000 | ||
| 75150 | S | Carbon disulfide | 1 | 3 | 30 ppm | 12 | 36 |
| 630080 | Carbon monoxide | 25 | 29 | 200 ppm | |||
| 558134 | Carbon tetrabromide | 0.1 | 1.4 | 0.3 | 4 | ||
| 56235 | S | Carbon tetrachloride | 2 | 12.6 | 200 ppm | 10 | 63 |
| 75445 | Carbonyl chloride; see Phosgene | ||||||
| 353504 | Carbonyl fluoride | 2 | 5 | 5 | 15 | ||
| 120809 | S | Catechol; pyrocatechol | 5 | 20 | |||
| 9004346 | Cellulose (paper fiber); see Particulates not otherwise regulated | ||||||
| 21351791 | Cesium hydroxide | 2 | |||||
| 57749 | S | Chlordane; 1,2,4,5,6,7,8,8-octachloro-3a,4,7,7a-tetrahydro-4,7-methanoindane | -- | 0.5 | |||
| 8001352 | S | Chlorinated camphene; toxaphene | -- | 0.5 | -- | 1 | |
| Chlorinated diphenyl oxide | -- | 0.5 | |||||
| 7782505 | Chlorine | 0.5 | 1.5 | 1 | 3 | ||
| 10049044 | Chlorine dioxide | 0.1 | 0.3 | 0.3 | 0.9 | ||
| 7790912 | Chlorine trifluoride | 0.1 | 0.4 | C | |||
| 107200 | Chloroacetaldehyde | 1 | 3 | C | |||
| 78955 | S | Chloroacetone | 1 | 3.8 | C | ||
| 532274 | alpha-Chloroacetophenone; phenacyl chloride | 0.05 | 0.3 | ||||
| 79049 | S | Chloroacetyl chloride | 0.05 | 0.2 | 0.15 | 0.69 | |
| 108907 | Chlorobenzene; monochlorobenzene | 10 | 46 | ||||
| 2698411 | S | o-Chlorobenzylidene malononitrile; OCBM | 0.05 | 0.4 | C | ||
| 74975 | Chlorobromomethane; bromochloromethane | 200 | 1,050 | ||||
| 126998 | S | 2-Chloro-1,3-butadiene; see Chloroprene | |||||
| 75456 | Chlorodifluoromethane; Fluorocarbon 22 | 1,000 | 3,500 | ||||
| 53469219 | S | Chlorodiphenyl (42% chlorine) | -- | 1 | |||
| 11097691 | S | Chlorodiphenyl (54% chlorine) | -- | 0.5 | |||
| 106898 | 1-Chloro-2,3-epoxypropane; see Epichlorohydrin | ||||||
| 75003 | Chloroethane; see Ethyl chloride | ||||||
| 107073 | 2-Chloroethanol; see Ethylene chlorohydrin | ||||||
| 75014 | Chloroethylene, see Vinyl chloride, Section 5210 | ||||||
| 67663 | Chloroform; trichloromethane | 2 | 9.78 | ||||
| 74873 | Chloromethane, see Methyl chloride | ||||||
| 107302 | Chloromethyl methyl ether; see Methyl chloromethyl ether, Section 5209 | ||||||
| 542881 | bis-Chloromethyl ether, see also Section 5209 | 0.001 | 0.005 | ||||
| 100005 | 1-Chloro-4-nitrobenzene; see p-Nitrochlorobenzene | ||||||
| 600259 | 1-Chloro-1-nitropropane | 2 | 10 | ||||
| 76153 | Chloropentafluoroethane | 1,000 | 6,320 | ||||
| 76062 | Chloropicrin; trichloronitromethane | 0.1 | 0.7 | ||||
| 126998 | S | Chloroprene; 2-chloro-1,3-butadiene | 10 | 36 | |||
| 598787 | S | 2-Chloropropionic acid | 0.1 | 0.44 | |||
| 2039874 | o-Chlorostyrene | 50 | 285 | 75 | 428 | ||
| 95498 | S | o-Chlorotoluene | 50 | 250 | |||
| 1929824 | 2-Chloro-6-(trichloromethyl)pyridine; see Nitrapyrin | -- | |||||
| 2921882 | S | Chlorpyrifos | -- | 0.2 | |||
| Chromite ore processing (chromate), as Cr | -- | 0.005 | |||||
| (see also Sections 1532.2, 5206 & 8359) | |||||||
| 7440473 | Chromium metal | -- | 0.5 | ||||
| Chromium (II) compounds, as Cr | -- | 0.5 | |||||
| Chromium (III) compounds, as Cr | -- | 0.5 | |||||
| Chromium (VI) compounds, as Cr | -- | 0.005 | 0.1 mg/M3 | ||||
| (see also Sections 1532.2, 5206 & 8359) | |||||||
| 14977618 | Chromyl chloride | 0.025 | 0.15 | ||||
| 2971906 | Clopidol | -- | |||||
| Total dust | -- | 10 | |||||
| Respirable fraction | -- | 5 | |||||
| Coal (Bituminous) dust | |||||||
| <5% quartz, respirable fraction(n) | -- | 0.9 | |||||
| >5% quartz, respirable fraction(n) | -- | 0.1 | |||||
| Coal tar pitch volatiles(i) | -- | 0.2 | |||||
| 7440484 | Cobalt, metal fume and dust, as Co | -- | 0.02 | ||||
| Cobalt carbonyl, as Co | -- | 0.1 | |||||
| 16842038 | Cobalt hydrocarbonyl, as Co | -- | 0.1 | ||||
| Coke oven emissions, see Section 5211 | -- | 0.15 | |||||
| 7440508 | Copper metal fume, as Cu | -- | 0.1 | ||||
| Copper salts, dusts and mists, as Cu | -- | 1 | |||||
| Corundum, see Particulates not otherwise regulated | |||||||
| Cotton dust, see also Section 5190 | -- | 1(j) | |||||
| 1319773 | S | Cresol (all isomers) | 5 | 22 | |||
| 123739 | S | Crotonaldehyde; beta-methylacrolein | 0.3 | ||||
| 4170303 | |||||||
| 299865 | Crufomate | -- | 5 | ||||
| 98828 | S | Cumene; isopropylbenzene | 50 | 245 | |||
| 420042 | Cyanamide | -- | 2 | ||||
| S | Cyanide, as CN | -- | 5 | ||||
| 460195 | Cyanogen | 10 | 20 | ||||
| 506774 | Cyanogen chloride | 0.3 | 0.6 | C | |||
| 110827 | Cyclohexane | 300 | 1,050 | ||||
| 108930 | S | Cyclohexanol | 50 | 200 | |||
| 108941 | S | Cyclohexanone | 25 | 100 | |||
| 110838 | Cyclohexene | 300 | 1,015 | ||||
| 108918 | S | Cyclohexylamine | 10 | 40 | |||
| 121824 | S | Cyclonite; RDX; cyclotrimethylenetrinitramine | -- | 0.07 | |||
| 542927 | Cyclopentadiene | 75 | 200 | ||||
| 287923 | Cyclopentane | 600 | 1,720 | ||||
| 13121705 | Cyhexatin; tricyclohexyltin hydroxide | 5 | |||||
| 94757 | 2,4-D;2,4-dichlorophenoxyacetic acid | -- | 10 | ||||
| 50293 | S | DDT; 1,1,1-trichloro-2,2-bis-(p-chlorophenyl)ethane | -- | 1 | |||
| 62737 | DDVP, see Dichlorvos | ||||||
| 17702419 | S | Decaborane | 0.05 | 0.3 | 0.15 | 0.9 | |
| 8065483 | S | Demeton; a mixture of o,o-diethyl o-2(ethylthio)ethyl phosphorothloate and o,o'-diethyl S-2(ethylthio)ethyl phosphorothioate | 0.01 | 0.1 | |||
| 123422 | Diacetone alcohol; 4-hydroxy-4-methyl-2-pentanone | 50 | 240 | ||||
| 107153 | 1,2-Diaminoethane; see Ethylenediamine Diatomacous earth; see Silica-amorphous | ||||||
| 333415 | S | Diazinon; o,o-diethyl o-(2-isopropyl-6-methyl-4-pyrimidinyl) phosphorothioate | -- | 0.1 | |||
| 334883 | Diazomethane | 0.2 | 0.4 | ||||
| 94360 | Dibenzoyl peroxide; see Benzoyl peroxide | ||||||
| 19287457 | Diborane | 0.1 | 0.1 | ||||
| 2528361 | S | Dibutyl phenyl phosphate | 0.3 | 3.5 | |||
| 96128 | 1,2-Dibromo-3-chloropropane; DBCP; see Section 5212 | .001 | .01 | ||||
| 75616 | Dibromodifluoromethane; see Difluorodibromomethane | ||||||
| 106934 | S | 1,2-Dibromoethane; see Ethylene dibromide, Section 5219 | |||||
| 102818 | S | 2-N-Dibutylaminoethanol | 2 | 14 | |||
| 107664 | Dibutyl phosphate | 1 | 5 | 2 | 10 | ||
| 84742 | Dibutyl phthalate | -- | 5 | ||||
| 7572294 | Dichloroacetylene | 0.1 | 0.4 | C | |||
| 95501 | S | o-Dichlorobenzene | 25 | 150 | 50 ppm | ||
| 106467 | p-Dichlorobenzene; 1,4-dichlorobenzene | 10 | 60 | 200 ppm | 110 | 675 | |
| 91941 | S | 3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-dichlorobiphenyl; see Section 5209 | |||||
| 764410 | S | 1,4-Dichloro-2-butene | 0.005 | 0.025 | |||
| 75718 | Dichlorodifluoromethane | 1000 | 4950 | 6200 ppm | |||
| 118525 | 1,3-Dichloro-5,5-dimethyl hydantoin | -- | 0.2 | -- | 0.4 | ||
| 75343 | 1,1-Dichloroethane | 100 | 400 | ||||
| 107062 | 1,2-Dichloroethane, see Ethylene dichloride | ||||||
| 75354 | 1,1-Dichloroethylene; see Vinylidene chloride | ||||||
| 540590 | 1,2-Dichloroethylene; acetylene dichloride | 200 | 790 | ||||
| 111444 | S | Dichloroethyl ether; bis(2-chloroethyl) ether | 5 | 30 | 10 | 60 | |
| 75434 | Dichlorofluoromethane; Fluorocarbon 21 | 10 | 42 | ||||
| 75092 | Dichloromethane; see Methylene chloride | ||||||
| 594729 | 1,1-Dichloro-1-nitroethane | 2 | 10 | ||||
| 78875 | 1,2-Dichloropropane; see Propylene dichloride | ||||||
| 542756 | S | Dichloropropene | 1 | 5 | |||
| 75990 | 2,2-Dichloropropionic acid | 1 | 6 | ||||
| 76142 | 1,2-Dichlorotetrafluoroethane; Fluorocarbon 114 | 1,000 | 7,000 | ||||
| 62737 | S | Dichlorvos (DDVP); 2,2-dichlorovinyl dimethyl phosphate | 0.1 | 1 | |||
| 141662 | S | Dicrotophos | -- | 0.25 | |||
| 5124301 | Dicyclohexylmethane-4,4'-diisocyanate; see Methylene bis-(4-cyclohexylisocyanate) | ||||||
| 77736 | Dicyclopentadiene | 5 | 30 | ||||
| 102545 | Dicyclopentadienyl iron | -- | |||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| 60571 | S | Dieldrin; 1,2,3,4,10,10-hexachloro-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-1,4-endo-exo-5,8-dimethanonaphthalene | -- | 0.25 | |||
| 111422 | S | Diethanolamine | 0.46 | 2 | |||
| 109897 | S | Diethylamine | 5 | 15 | C | ||
| 112367 | S | Diethylene glycol diethyl ether, Ethyl diglyme | 5 | 33 | |||
| 111966 | S | Diethylene glycol dimethyl ether, Diglyme | 1 | 5.5 | 5 | 27 | |
| 100378 | S | 2-(Diethylamino) ethanol | 2 | 9.6 | |||
| 123911 | 1,4-Diethylene dioxide; see p-Dioxane | ||||||
| 111400S | Diethylenetriamine | 1 | 4 | ||||
| 60297 | Diethyl ether; see Ethyl ether | ||||||
| 117817 | Di-(2-ethylhexyl) phthalate; see Di-sec-octyl phthalate | ||||||
| 96220 | Diethyl ketone | 200 | 705 | 300 | 1057 | ||
| 84662 | Diethyl phthalate | -- | 5 | ||||
| 75616 | Difluorodibromomethane; dibromodifluoromethane | 100 | 860 | ||||
| 2238075 | Diglycidyl ether; DGE; bis(2,3-epoxypropyl) ether | 0.1 | 0.5 | ||||
| 123319 | p-Dihydroxybenzene; see Hydroquinone | ||||||
| 108838 | Diisobutyl ketone; 2,6-dimethyl-4-heptanone | 25 | 150 | ||||
| 108189 | S | Diisopropylamine | 5 | 20 | |||
| 108203 | Diisopropyl ether; see Isopryl ether | ||||||
| 109875 | Dimethoxymethane; see Methylal | ||||||
| 127195 | S | Dimethylacetamide | 10 | 35 | |||
| 124403 | Dimethylamine | 5 | 9.2 | 15 | 27.6 | ||
| 60117 | 4-Dimethylaminoazobenzene, see Section 5209 | ||||||
| 1300738 | Dimethylaminobenzene; see Xylidene | ||||||
| 121697 | S | N,N-Dimethylaniline; dimethylphenylamine | 5 | 25 | 10 | 50 | |
| 1330207 | Dimethylbenzene; see Xylene | ||||||
| 108849 | 1,3-Dimethylbutyl acetate; see sec-Hexyl acetate | ||||||
| 300765 | o,o-Dimethyl o-(1,2-dibromo-2,2-dichloroethyl) phosphate; see Naled | ||||||
| 14857342 | Dimethylethoxysilane | 0.5 | 2.1 | 1.5 | 6.4 | ||
| 68122 | S | Dimethylformamide; DMF | 10 | 30 | |||
| 108838 | 2,6-Dimethyl-4-heptanone; see Diisobutyl ketone | ||||||
| 57147 | S | 1,1-Dimethylhydrazine | 0.01 | 0.025 | |||
| 67641 | Dimethyl ketone; see Acetone | ||||||
| 62759 | N,N-Dimethylnitrosamine; see N-Nitrosodimethylamine, Section 5209 | ||||||
| 131113 | Dimethyl phthalate | -- | 5 | ||||
| 77781 | S | Dimethyl sulfate; methyl sulfate | 0.1 | 0.5 | |||
| 148016 | Dinitolmide; 3,5-Dinitro-o-toluamide | -- | 5 | ||||
| 528290, 99650, 100254 | S | Dinitrobenzene (all (isomers) ortho, meta and para isomers | 0.15 | 1 | |||
| 534521 | S | 4,6-Dinitro-o-cresol; 2-methyl-4,6-dinitrophenol | -- | 0.2 | |||
| 25321146 | S | 2,4-Dinitrotoluene | -- | 0.15 | |||
| 123911 | S | p-Dioxane; | |||||
| 1,4-dioxacyclohexane; | 0.28 | 1.0 | |||||
| 1,4-diethylene dioxide | |||||||
| 78342 | S | Dioxathion | -- | 0.2 | |||
| 92524 | Diphenyl; see Biphenyl | ||||||
| 122394 | Diphenylamine; N-phenylaniline | -- | 10 | ||||
| 101688 | Diphenylmethane diisocyanate; see Methylene bis(phenylisocyanate) | ||||||
| 123193 | Dipropyl ketone | 50 | 235 | ||||
| 34590948 | S | Dipropylene glycol methyl ether | 100 | 600 | 150 | 900 | |
| 85007 | Diquat; 1,1'-ethylene-2,2'-dipyridinium dibromide | -- | |||||
| Total dust | -- | 0.5 | |||||
| Respirable fraction(n) | -- | 0.1 | |||||
| 117817 | Di-sec-octyl phthalate; bis(2 ethylhexyl) phthalate | -- | 5 | -- | |||
| 97778 | Disulfiram | -- | 2 | ||||
| 298044 | S | Disulfoton; o,o-diethyl S-2-(ethylthio)ethyl phosphorodithioate | -- | 0.1 | |||
| 128370 | 2,6-Di-tert-butyl-p-cresol | -- | 10 | ||||
| 330541 | Diuron | -- | 10 | ||||
| 68122 | DMF; see Dimethylformamide | ||||||
| 57147 | DMH; see 1,1-Dimethylhydrazine | ||||||
| 1321740 | Divinyl benzene | 10 | 50 | ||||
| Dust, nuisance dust and particulates, see Particulates not otherwise regulated | |||||||
| 12415348 | Emery; see Particulates not otherwise regulated | ||||||
| 115297 | S | Endosulfan; 6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4, 3-benzodioxathiepin-3-oxide | -- | 0.1 | |||
| 72208 | S | Endrin; 1,2,3,4,10,10-hexachloro-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-1,4-endo-endo-5, 8-dimethanonaphthalene | -- | 0.1 | |||
| 13838169 | Enflurane | 2 | 15 | ||||
| 106898 | S | Epichlorohydrin; 1-chloro-2, 3-epoxypropane | 0.05 | 0.19 | |||
| 2104645 | S | EPN; o-ethyl o-(p-nitrophenyl) phenylphosphonothioate | -- | 0.1 | |||
| 75569 | 1,2-Epoxypropane; see Propylene oxide | ||||||
| 556525 | 2,3-Epoxypropanol; see Glycidol | ||||||
| 74840 | Ethane | (h) | -- | ||||
| 75081 | Ethanethiol; see Ethyl mercaptan | ||||||
| 64175 | Ethanol; see Ethyl alcohol | ||||||
| 141435 | Ethanolamine; 2-aminoethanol | 3 | 8 | 6 | 15 | ||
| 563122 | S | Ethion | -- | 0.4 | |||
| 110805 | S | 2-Ethoxyethanol | 5 | 18 | |||
| 111159 | S | 2-Ethoxyethyl acetate | 5 | 27 | |||
| 141786 | Ethyl acetate | 400 | 1,400 | ||||
| 140885 | S | Ethyl acrylate | 5 | 20 | 25 | 100 | |
| 64175 | Ethyl alcohol; ethanol | 1,000 | 1,900 | ||||
| 75047 | S | Ethylamine | 5 | 9.2 | C | ||
| 541855 | Ethyl sec-amyl ketone; 5-methyl-3-heptanone | 25 | 130 | ||||
| 100414 | Ethylbenzene | 5 | 22 | 30 | 130 | ||
| 74964 | S | Ethyl bromide | 5 | 22 | |||
| 106354 | Ethyl butyl ketone; 3-heptanone | 50 | 230 | 75 | 345 | ||
| 75003 | S | Ethyl chloride; chloroethane | 100 | 264 | |||
| 7085850 | Ethyl cyanoacrylate | 0.2 | 1.02 | ||||
| 637923 | Ethyl tert-butyl ether | 5 | 21 | ||||
| 74851 | Ethylene | (h) | -- | ||||
| 107073 | S | Ethylene chlorohydrin; 2-chloroethanol | 1 | 3 | C | ||
| 107153 | Ethylenediamine; 1,2-diaminoethane | 10 | 25 | ||||
| 106934 | S | Ethylene dibromide; 1,2-dibromoethane, see Section 5219 | 0.13 | 1 | C | ||
| 107062 | Ethylene dichloride; 1,2-dichloroethane | 1 | 4 | 200 ppm | 2 | 8 | |
| 107211 | Ethylene glycol (vapor) | 40 | 100 | C | |||
| 629141 | S | Ethylene glycol diethyl ether, 1,2-diethoxyethane | 5 | 24 | |||
| 110714 | S | Ethylene glycol dimethyl ether, 1,2-dimethoxyethane, Glyme | 1 | 3.7 | 5 | 18 | |
| 628966 | S | Ethylene glycol dinitrate | (k) | -- | 0.1 | ||
| 110805 | S | Ethylene glycol monoethyl ether, see 2-Ethoxyethanol | |||||
| 109864 | S | Ethylene glycol monomethyl ether, see 2-Methoxyethanol | |||||
| 110496 | S | Ethylene glycol monomethyl ether acetate; see 2-Methoxyethyl acetate | |||||
| 151564 | S | Ethyleneimine; see also Section 5209 | 0.5 | 1 | |||
| 75218 | Ethylene oxide; see Section 5220 | 1 | 2 | 5 | |||
| 60297 | Ethyl ether | 400 | 1,200 | 500 | 1500 | ||
| 109944 | Ethyl formate | 100 | 300 | ||||
| 75343 | Ethylidene chloride; see 1,1-Dichloroethane | ||||||
| 16219753 | Ethylidene norbornene | 5 | 25 | C | |||
| 75081 | Ethyl mercaptan; ethanethiol | 0.5 | 1 | ||||
| 78933 | Ethyl methyl ketone; see Methyl ethyl ketone | ||||||
| 100743 | S | N-Ethylmorpholine; 4-ethyl-1, 4-tetrahydrooxazine | 5 | 23 | |||
| 78104 | Ethyl silicate; tetraethyl silicate | 10 | 85 | ||||
| 22224926 | S | Fenamiphos | 0.1 | ||||
| 115902 | Fensulfothion | -- | 0.1 | ||||
| 55389 | S | Fenthion | -- | 0.2 | |||
| 14484641 | Ferbam; ferric N,N-dimethylthiocarbamate | -- | 10 | ||||
| 12604589 | Ferrovanadium dust | -- | 1 | -- | 3 | ||
| 14808607 | Fibrous glass, see Glass | ||||||
| Flour dust | 0.5(s) | ||||||
| Fluorides, as F | -- | 2.5 | |||||
| 7782414 | Fluorine | 0.1 | 0.2 | ||||
| 75694 | Fluorocarbon 11; see Trichlorofluoromethane | ||||||
| 75718 | Fluorocarbon 12; see Dichlorodifluoromethane | ||||||
| 75434 | Fluorocarbon 21; see Dichlorofluoromethane | ||||||
| 75456 | Fluorocarbon 22; see Chlorodifluoromethane | ||||||
| 76120 | Fluorocarbon 112; see 1,1,2,2-Tetrachloro-1,2-difluoroethane | ||||||
| 76131 | Fluorocarbon 113; see 1,1,2-Trichloro-1,2,2-trifluoroethane | ||||||
| Fluorocarbon 114; see 1,2-Dichlorotetrafluoroethane | |||||||
| 75694 | Fluorotrichloromethane; see Trichlorofluoromethane | ||||||
| 944229 | S | Fonofos | -- | 0.1 | |||
| 50000 | Formaldehyde, see Section 5217 | 0.75 | -- | 2 | -- | ||
| 75127 | S | Formamide | 10 | 18 | |||
| 64186 | Formic acid | 5 | 9 | 10 | 19 | ||
| 98011 | S | Furfural | 2 | 8 | |||
| 98000 | S | Furfuryl alcohol | 10 | 40 | 15 | 60 | |
| 8006619 | Gasoline | 300 | 900 | 500 | 1500 | ||
| 7782652 | Germanium tetrahydride | 0.2 | 0.6 | ||||
| Glass, fibrous | 1.0 f/cc(q) | ||||||
| 111308 | Glutaraldehyde(t) | 0.05 | 0.2 | C | |||
| 56815 | Glycerin mist; see Particulates not otherwise regulated | ||||||
| 123944 | Glyceryl stearate | -- | 10 | ||||
| 556525 | Glycidol; 2,3-epoxy-1-propanol | 2 | 6.1 | ||||
| 111762 | Glycol monobutyl ether; see 2-Butoxyethanol | ||||||
| 110805 | Glycol monoethyl ether; see 2-Ethoxyethanol | ||||||
| 109864 | Glycol monomethyl ether; see 2-Methoxyethanol | ||||||
| 107222 | Glyoxal, 1,2-ethanedione | -- | 0.1(s), (u) | ||||
| Grain dust (oat, wheat, barley) | -- | 10 | |||||
| 7782425 | Graphite, natural respirable dust | 2.5 | |||||
| Graphite, synthetic | |||||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| 13397245 | Gypsum; Calcium sulfate dihydrate; see Particulates not otherwise regulated | ||||||
| 7440586 | Hafnium | -- | 0.5 | ||||
| 151677 | Halothane | 2 | 16 | ||||
| 822060 | HDI; see Hexamethylene diisocyanate | ||||||
| 7440597 | Helium | (h) | -- | ||||
| 76448 | S | Heptachlor; 1,4,5,6,7,8,8-hepta-chloro-3a,4,7,7a-tetrahydro-4,7-methanoindene | -- | 0.05 | |||
| 142825 | n-Heptane | 400 | 1,600 | 500 | 2000 | ||
| 118741 | S | Hexachlorobenzene | -- | 0.002 | |||
| 87683 | S | Hexachlorobutadiene | 0.02 | 0.24 | |||
| 77474 | Hexachlorocyclopentadiene | 0.01 | 0.11 | ||||
| 67721 | S | Hexachloroethane; perchloroethane | 1 | 10 | |||
| 1335871 | S | Hexachloronaphthalene | -- | 0.2 | |||
| 684162 | S | Hexafluoroacetone; 1,1,1,3,3,3-hexafluoro-2-propanone | 0.1 | 0.7 | |||
| 822060 | Hexamethylene diisocyanate; HDI | 0.005 | 0.034 | ||||
| 110543 | S | n-Hexane | 50 | 180 | |||
| Hexane, other isomers | 500 | 1800 | 1000 | 3600 | |||
| 124094 | 1,6-Hexanediamine | 0.5 | 2.3 | ||||
| 591786 | 2-Hexanone; see Methyl butyl ketone | ||||||
| 592416 | 1-Hexene | 50 | 180 | ||||
| 108101 | Hexone; see Methyl isobutyl ketone | ||||||
| 108849 | sec-Hexyl acetate; 4-methyl-2-pentyl acetate; 1,3-dimethyl-butyl acetate | 50 | 300 | ||||
| 107415 | Hexylene glycol | 25 | 125 | C | |||
| 302012 | S | Hydrazine | 0.01 | 0.013 | |||
| 10035106 | Hydrobromic acid; see Hydrogen bromide | ||||||
| 7647010 | Hydrochloric acid; see Hydrogen chloride | ||||||
| 74908 | Hydrocyanic acid; see Hydrogen cyanide | ||||||
| 7664393 | Hydrofluoric acid; see Hydrogen fluoride | ||||||
| 1333740 | Hydrogen | (h) | -- | ||||
| 61788327 | Hydrogenated terphenyls | 0.5 | 5 | ||||
| 10035106 | Hydrogen bromide | 3 | 10 | C | |||
| 7647010 | Hydrogen chloride | 0.3 | 0.45 | 2 ppm | |||
| 74908 | S | Hydrogen cyanide | 4.7 | 5 | C | ||
| 7664393 | S | Hydrogen fluoride, as F | 0.4 | 0.33 | 1 | 0.83 | |
| 7722841 | Hydrogen peroxide, as H$2O$2 | 1 | 1.4 | ||||
| 7783075 | Hydrogen selenide, as Se | 0.05 | 0.2 | ||||
| 7783064 | Hydrogen sulfide | 10 | 14 | 50 ppm | 15 | 21 | |
| 123319 | Hydroquinone; 1,4-benezendiol | -- | 2 | ||||
| 999611 | S | 2-Hydroxypropyl acrylate | 0.5 | 3 | |||
| 95136 | Indene | 10 | 48 | ||||
| 7440746 | Indium | -- | 0.1 | ||||
| Indium compounds | -- | 0.1 | |||||
| 7553562 | Iodine | 0.1 | 1 | C | |||
| 75478 | Iodoform | 0.6 | 10 | ||||
| 4098719 | IPDI; see Isophorone diisocyanate | ||||||
| 1309371 | Iron oxide fume | -- | 5 | ||||
| 13463406 | Iron pentacarbonyl, as Fe | 0.1 | 0.8 | 0.2 | 1.6 | ||
| Iron salts, soluble, as Fe | -- | 1 | |||||
| 123922 | Isoamyl acetate; 3-methylbutyl acetate; see Pentyl acetate | ||||||
| 123513 | Isoamyl alcohol; 3-methylbutanol | 100 | 360 | 125 | 450 | ||
| 110190 | Isobutyl acetate; 2-methylpropyl acetate | 150 | 700 | ||||
| 78831 | Isobutyl alcohol; 2-methylpropanol | 50 | 150 | ||||
| 26675467 | Isoflurane | 2 | 15 | ||||
| 26952216 | S | Isooctyl alcohol | 50 | 270 | |||
| 78591 | Isophorone; 3,5,5-trimethyl-2-cyclohexene-1-one | 4 | 23 | ||||
| 4098719 | S | Isophorone diisocyanate; IPDI | 0.005 | 0.045 | 0.02 | -- | |
| 109591 | Isopropoxyethanol | 25 | 105 | ||||
| 108214 | Isopropyl acetate | 250 | 950 | 310 | 1185 | ||
| 67630 | Isopropyl alcohol | 400 | 980 | 500 | 1225 | ||
| 75310 | Isopropylamine | 5 | 12 | 10 | 24 | ||
| 768525 | S | N-isopropylaniline | 2 | 10 | |||
| 108203 | Isopropyl ether; diisopropyl ether | 250 | 1,050 | ||||
| 4016142 | Isopropyl glycidyl ether; IGE; 1,2-epoxy-3-isopropoxypropane | 50 | 240 | 75 | 360 | ||
| 1332587 | Kaolin; (respirable dust containing no asbestos and <1% crystaline silica) | -- | 2 | ||||
| 463514 | Ketene; ethenone | 0.5 | 0.9 | 1.5 | 3 | ||
| Lead arsenate, see Sections 5214 and 5198 | |||||||
| 7758976 | Lead chromate, as Pb | -- | 0.020 | ||||
| as Cr | -- | 0.005 | |||||
| (see also Sections 5198, 1532.1, 1532.2, 5206 & 8359) Lead (metallic) and inorganic compounds, dust and fume, as Pb (see also Section 5198) | -- | 0.05 | |||||
| 78002 | Lead tetraethyl, see Tetraethyl lead | ||||||
| 75741 | Lead tetramethyl, see Tetramethyl lead | ||||||
| 1317653 | Limestone; calcium carbonate; see Particulates not otherwise regulated | ||||||
| 58899 | S | Lindane; 1,2,3,4,5,6-hexachlorocyclohexane, gamma isomer | -- | 0.5 | |||
| 7580678 | Lithium hydride | -- | 0.025 | ||||
| L.P.G.; liquefied petroleum gas | 1,000 | 1,800 | |||||
| 4485125 | Lithium stearate | -- | 10 | ||||
| 13717005 | Magnesite; magnesium carbonate; see Particulates not otherwise regulated | ||||||
| 1309484 | Magnesium oxide fume, as Mg | -- | 10 | ||||
| 557040 | Magnesium stearate | -- | 10 | ||||
| 121755 | S | Malathion; o,o-dimethyl S-1(1,2-dicarboethyoxyethyl) phosphorodithioate | -- | 10 | |||
| 108316 | Maleic anhydride; cis-butenedioic anhydride | 0.1 | 0.4 | ||||
| Manganese and compounds, as Mn | -- | 0.2 | |||||
| 7439965 | Manganese fume, as Mn | -- | 0.2 | -- | 3 | ||
| 12079651 | S | Manganese, cyclopentadienyl-tricarbonyl, as Mn | -- | 0.1 | |||
| Manganese tetroxide | -- | 0.2 | |||||
| Marble; calcium carbonate; see Particulates not otherwise regulated | |||||||
| 101779 | S | MDA; see 4,4'-Methylene dianiline | |||||
| 101688 | MDI; see Methylene bis(phenylisocyanate) | ||||||
| 7439976 | S | Mercury alkyls, as Hg | -- | 0.01 | 0.04 mg/M3 | -- | 0.03 |
| 7439976 | S | Mercury, metallic and inorganic compounds as Hg | -- | 0.025 | 0.1 mg/M3 | ||
| 7439976 | S | Mercury aryl compounds as Hg | 0.1 | C | |||
| 108678 | Mesitylene; see 1,3,5-Trimethylbenzene | ||||||
| 141797 | Mesityl oxide; 4-methyl-3-pentene-2-one | 15 | 60 | 25 | 100 | ||
| 79414 | S | Methacrylic acid | 20 | 70 | |||
| 74828 | Methane | (h) | -- | ||||
| 74931 | Methanethiol; see Methyl mercaptan | ||||||
| 67561 | Methanol; see Methyl alcohol | ||||||
| 16752775 | S | Methomyl | -- | 2.5 | |||
| 72435 | Methoxychlor; 1,1,1-trichloro-2, 2-bis(p-methoxyphenyl)ethane | -- | 10 | ||||
| 109864 | S | 2-Methoxyethanol | 5 | 16 | |||
| 110496 | 2-Methoxyethyl acetate | 5 | 24 | ||||
| 76380 | Methoxyflurane | 2 | 13 | ||||
| 150765 | 4-Methoxyphenol | -- | 5 | ||||
| 79209 | Methyl acetate | 200 | 610 | 250 | 760 | ||
| 74997 | Methyl acetylene; propyne | 1,000 | 1,650 | ||||
| Methyl acetylene-propadiene mixture; MAPP | 1,000 | 1,800 | 1250 | 2250 | |||
| 96333 | S | Methyl acrylate | 10 | 35 | |||
| 126987 | S | alpha-Methylacrylonitrile | 1 | 3 | |||
| 624419 | 2-Methylbutyl acetate; see Pentyl acetate | ||||||
| 109875 | Methylal; dimethoxymethane | 1,000 | 3,100 | ||||
| 67561 | S | Methyl alcohol; methanol | 200 | 260 | 1000 ppm | 250 | 325 |
| 74895 | Methylamine | 5 | 6.4 | 15 | 19 | ||
| 108112 | Methyl amyl alcohol; see Methyl isobutyl carbinol | ||||||
| 110430 | Methyl n-amyl ketone; 2-heptanone | 50 | 235 | ||||
| 100618 | S | N-Methylaniline; monomethylaniline | 0.5 | 2 | |||
| 95534 | o-Methylaniline; see o-Toluidine | ||||||
| 74839 | S | Methyl bromide | 1 | 3.88 | 20 ppm | ||
| 591786 | S | Methyl n-butyl ketone; 2-hexanone | 1 | 4 | 10 | 40 | |
| 74873 | Methyl chloride | 50 | 105 | 300 ppm | 100 | 210 | |
| 71556 | Methyl chloroform; 1,1,1-trichloroethane | 350 | 1900 | 800 ppm | 450 | 2450 | |
| 107302 | Methyl chloromethyl ether; see Section 5209 | ||||||
| 75058 | Methyl cyanide; see Acetonitrile | ||||||
| 137053 | Methyl 2-cyanoacrylate | 0.2 | 0.908 | ||||
| 108872 | Methylcyclohexane | 400 | 1,600 | ||||
| 25639423 | Methylcyclohexanol (meta- and para-isomer mixture) | 50 | 235 | ||||
| 583608 | S | o-Methylcyclohexanone | 50 | 230 | 75 | 345 | |
| 12108133 | S | 2-Methylcyclopentadienyl manganese tricarbonyl, as Mn | -- | 0.2 | |||
| 8022002 | S | Methyl demeton; a mixture of o,o-dimethyl o-(2-(ethylthio)ethyl) phosphorothioate and o,o-dimethyl S-(2-(ethylthio)-ethyl) phosphorothioate | -- | 0.5 | |||
| 101144 | S | 4,4'-Methylene bis(2-chloroaniline), see also Section 5215 | -- | 0.01 | |||
| 5124301 | Methylene bis(4-cyclohexylisocyanate); hydrogenated MDI | 0.005 | 0.054 | ||||
| 101688 | Methylene bis(phenylisocyanate); MDI; diphenylmethane diisocyanate | 0.005 | 0.051 | ||||
| 75092 | Methylene chloride; dichloromethane (see also section 5202) | 25 | 87 | 125 | 435 | ||
| 101779 | S | 4,4'-Methylene dianiline; MDA (see also Sections 1535 & 5200) | 0.01 | 0.08 | 0.1 | 0.8 | |
| 78933 | Methyl ethyl ketone; MEK; 2-butanone; ethyl methyl ketone | 200 | 590 | 300 | 885 | ||
| 1338234 | Methyl ethyl ketone peroxide | 0.2 | 1.5 | C | |||
| 107313 | Methyl formate | 100 | 250 | 150 | 375 | ||
| 60344 | S | Methyl hydrazine; monomethyl hydrazine | 0.01 | 0.019 | |||
| 74884 | S | Methyl iodide | 2 | 10 | |||
| 110123 | Methyl isoamyl ketone | 50 | 234 | ||||
| 108112 | S | Methyl isobutyl carbinol; 4-methyl-2-pentanol; methyl amyl alcohol | 25 | 100 | 40 | 165 | |
| 108101 | Methyl isobutyl ketone; Hexone | 50 | 205 | 75 | 300 | ||
| 624839 | S | Methyl isocyanate | 0.02 | 0.05 | |||
| 563804 | Methyl isopropyl ketone | 200 | 705 | ||||
| 74931 | Methyl mercaptan | 0.5 | 1 | ||||
| 80626 | Methyl methacrylate; methyl 2-methyl-2-propenoate | 50 | 205 | 100 | 410 | ||
| 298000 | S | Methyl parathion; o,o-dimethyl o-(p-nitrophenyl) phosphorothioate | -- | 0.2 | |||
| 107879 | Methyl propyl ketone; 2-pentanone | 200 | 700 | 250 | 875 | ||
| 872504 | S | N-Methylpyrrolidone (NMP) | 1 | 4 | |||
| 1-Methy1-2-pyrrolidone; | |||||||
| N-Methyl-2-pyrrolidone; | |||||||
| 1-Methy1-2-pyrrolidinone | |||||||
| 681845 | Methyl silicate; tetramethyl silicate | 1 | 6 | ||||
| 98839 | alpha-Methylstyrene; 1-methyl-1-phenylethene | 50 | 240 | 100 | 485 | ||
| 77781 | Methyl sulfate; see Dimethyl sulfate | ||||||
| 1634044 | Methyl tert-butyl ether; MTBE | 40 | 144 | ||||
| 78944 | S | Methyl vinyl ketone | 0.05 | 0.14 | C | ||
| 21087649 | Metribuzin | -- | 5 | ||||
| 7786347 | S | Mevinphos; 2-carbomethoxyl-1-propen-2-yl dimethyl phosphate | 0.01 | 0.1 | 0.03 | 0.3 | |
| Mica, see Silicates | |||||||
| Mineral wool fiber; see Particulates not otherwise regulated | |||||||
| 7439987 | Molybdenum, insoluble compounds, as Mo | -- | 0.5(n) | ||||
| Total dust | -- | 10 | |||||
| Respirable fraction (n) | -- | 3 | |||||
| Molybdenum, soluble compounds, as Mo | -- | 0.5(n) | |||||
| 6923224 | Monocrotophos | -- | 0.25 | ||||
| 100618 | Monomethylaniline; see N-Methylaniline | ||||||
| 60344 | Monomethylhydrazine; see Methyl hydrazine | ||||||
| 110918 | S | Morpholine; tetrahydro-4H-1, 4-oxazine | 20 | 70 | 30 | 105 | |
| 7647010 | Muriatic acid; see Hydrogen chloride | ||||||
| 300765 | S | Naled; o,o-dimethyl o-(1,2-dibromo-2,2-dichloroethyl) phosphate | -- | 3 | |||
| 8030317 | Naphtha, coal tar | 100 | 400 | ||||
| 91203 | S | Naphthalene | 0.1 | 0.5 | |||
| 134327 | alpha-Naphthylamine; 1-naphthylamine, see Section 5209 | ||||||
| 91598 | beta-Naphthylamine; 2-naphthylamine, see Section 5209 | ||||||
| 63252 | 1-Naphthyl N-methylcarbamate; see Carbaryl | ||||||
| 25551284 | Naphthalene diisocyanate; NDI | 0.01 | 0.085 | C | |||
| 7440019 | Neon | (h) | |||||
| 13463393 | Nickel carbonyl; Ni (CO)$4 | 0.001 | 0.007 | ||||
| 7440020 | Nickel metal, as Ni | -- | 0.5 | ||||
| Nickel, insoluble compounds, as Ni | -- | 0.1 | |||||
| Nickel, soluble compounds, as Ni | -- | 0.05 | |||||
| 12035722 | Nickel subsulfide | -- | .05 | ||||
| 54115 | S | Nicotine; 1-methyl-2-(3-pyridyl)-pyrrolidine | 0.075 | 0.5 | |||
| 1929824 | Nitrapyrin | -- | |||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| 7697372 | Nitric acid | 2 | 5 | 4 | 10 | ||
| 10102439 | Nitric oxide; NO | 25 | 30 | ||||
| 100016 | S | p-Nitroaniline | -- | 3 | |||
| 98953 | S | Nitrobenzene | 1 | 5 | |||
| 100005 | S | p-Nitrochlorobenzene; 1-chloro-4-nitrobenzene | 0.1 | 0.64 | |||
| 92933 | 4-Nitrodiphenyl, see Section 5209 | ||||||
| 79243 | Nitroethane | 100 | 310 | ||||
| 7727379 | Nitrogen | (h) | -- | ||||
| 10102440 | Nitrogen dioxide | 1 | 1.8 | ||||
| Nitrogen tetroxide; N$2O$4; see Nitrogen dioxide | |||||||
| 7783542 | Nitrogen trifluoride | 10 | 29 | ||||
| 55630 | S | Nitroglycerin | (k) | -- | 0.1 | ||
| 75525 | Nitromethane | 2 | 5 | ||||
| 108032 | 1-Nitropropane | 25 | 90 | ||||
| 79469 | 2-Nitropropane | 10 | 35 | ||||
| 62759 | N-Nitrosodimethylamine, see Section 5209 | ||||||
| 1321126, 99081, 88722, 99990 | S | Nitrotoluene | 2 | 11 | |||
| 76062 | Nitrotrichloromethane; see Chloropicrin | ||||||
| 0024972 | Nitrous oxide | 50 | 90 | ||||
| 111842 | Nonane | 200 | 1,050 | ||||
| Nuisance particulates, see Particulates not otherwise regulated Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| 2234131 | S | Octachloronaphthalene | -- | 0.1 | -- | 0.3 | |
| 111659 | Octane | 300 | 1,450 | 375 | 1800 | ||
| 8012951 | Oil (mineral) mist, particulate | -- | (5)(l) | ||||
| Oil (vegetable) mists (except castor, cashew nut or similar irritant oils); see Nuisance particulates | |||||||
| Organic arsenic compounds; see Arsenic, organic | |||||||
| 20816120 | Osmium tetroxide, as Os | 0.0002 | 0.002 | 0.0006 | 0.006 | ||
| 144627 | Oxalic acid | -- | 1 | -- | 2 | ||
| 7783417 | Oxygen difluoride | 0.05 | 0.1 | C | |||
| 10028156 | Ozone | 0.1 | 0.2 | 0.3 | 0.6 | ||
| 8002742 | Paraffin wax fume | -- | 2 | ||||
| 1910425, | S | Paraquat, total particulates | -- | 0.5 | |||
| 2074502 | |||||||
| 1910425, | S | Paraquat, respirable sizes | -- | 0.1(n) | |||
| 2074502 | |||||||
| 56382 | S | Parathion; o,o-diethyl o-(p-nitrophenyl) phosphorothioate | -- | 0.1 | |||
| Particulates not otherwise regulated Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| Particulate polycyclic aromatic hydrocarbons (PPAH); see Coal tar pitch volatiles | |||||||
| PCB; see Chlorodiphenyl | |||||||
| 87865 | S | PCP; see Pentachlorophenol | |||||
| 19624227 | Pentaborane | 0.005 | 0.01 | 0.015 | 0.03 | ||
| 1321648 | S | Pentachloronaphthalene | -- | 0.5 | |||
| 87865 | S | Pentachlorophenol; PCP | -- | 0.5 | |||
| 115775 | Pentaerythritol; tetrakis-(hydroxymethyl)methane; tetra-methylolmethane; see Particulates not otherwise regulated | ||||||
| 109660 | Pentane | 600 | 1,800 | ||||
| 107879 | 2-Pentanone; see Methyl propyl ketone | ||||||
| 628637; 626380; 123922; 625161; 620111; 624419 | Pentyl acetate | 50 | 266 | 100 | 532 | ||
| 67721 | Perchloroethane; see Hexachloroethane | ||||||
| 127184 | Perchloroethylene | 25 | 170 | 300 ppm | 100 | 685 | |
| 594423 | Perchloromethyl mercaptan; trichloromethanethiol | 0.1 | 0.8 | ||||
| 7616946 | Perchloryl fluoride; C10$3F | 3 | 14 | 6 | 28 | ||
| 382218 | Perfluoroisobutylene | 0.01 | 0.082 | C | |||
| Perlite | |||||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| 108952 | S | Phenol | 5 | 19 | |||
| 92842 | S | Phenothiazine; dibenzothiazine | -- | 5 | |||
| 106503 | S | p-Phenylenediamine | -- | 0.1 | |||
| 101848 | Phenyl ether, vapor | 1 | 7 | ||||
| 100425 | Phenylethylene; see Styrene | ||||||
| 122601 | S | Phenyl glycidyl ether, PGE; 1,2-epoxy-3-phenoxypropane | 0.1 | 0.6 | |||
| 100630 | S | Phenylhydrazine | 5 | 20 | 10 | 45 | |
| 108985 | Phenyl mercaptan | 0.5 | 2 | ||||
| 638211 | Phenylphosphine | 0.05 | 0.25 | C | |||
| 298022 | S | Phorate; o,o-diethyl S-(ethylthio)methyl phosphorodithioate | -- | 0.05 | -- | 0.2 | |
| 75445 | Phosgene; carbonyl chloride; COCl$2 | 0.1 | 0.4 | ||||
| 7803512 | Phosphine; PH$3 | 0.3 | 0.4 | 1 | 1 | ||
| 7664382 | Phosphoric acid | -- | 1 | -- | 3 | ||
| 7723140 | Phosphorus, yellow | -- | 0.1 | ||||
| 10025873 | Phosphorus oxychloride | 0.1 | 0.6 | ||||
| 10026138 | Phosphorus pentachloride | 0.1 | 1 | ||||
| 1314803 | Phosphorus pentasulfide; P$2S$5 | -- | 1 | -- | 3 | ||
| 7719122 | Phosphorus trichloride | 0.2 | 1.5 | 0.5 | 3 | ||
| 85449 | Phthalic anhydride | 1 | 6 | ||||
| 626175 | m-Phthalodinitrile | -- | 5 | ||||
| 1918021 | Picloram | -- | |||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| 88891 | S | Picric acid; 2,4,6-trinitrophenol | -- | 0.1 | |||
| 83261 | Pindone; 2-pivalyl-1, 3-indandione | 0.1 | |||||
| 142643 | Piperazine dihydrochloride | -- | 5 | ||||
| 26499650 | Plaster of Paris; calcium sulfate hemihydrate; see Particulates not otherwise regulated | ||||||
| 7440064 | Platinum, metal | -- | 1 | ||||
| Platinum, soluble salts, as Pt | -- | 0.002 | |||||
| Polychlorobiphenyls, see Chlorodiphenyl | |||||||
| Polytetrafluoroethylene, decomposition products | -- | (m) | |||||
| Portland Cement; see Particulates not otherwise regulated | |||||||
| 1310583 | Potassium hydroxide; caustic potash | -- | 2 | C | |||
| 593293 | Potassium stearate | -- | 10 | ||||
| 74986 | Propane | 1000 | 1800(h) | ||||
| 107197 | S | Propargyl alcohol; 2-propyn-1-o1 | 1 | 2 | |||
| 57578 | beta-Propiolactone, see Section 5209 | 0.5 | 1.5 | ||||
| 79094 | Propionic acid | 10 | 30 | ||||
| 114261 | Propoxur; 2-isopropoxyphenyl N-methyl carbamate | 0.5 | |||||
| 109604 | n-Propyl acetate | 200 | 840 | 250 | 1050 | ||
| 71238 | S | n-Propyl alcohol | 200 | 500 | 250 | 625 | |
| 115071 | Propylene | (h) | -- | ||||
| 78875 | Propylene dichloride; 1,2-dichloropropane | 75 | 350 | 110 | 510 | ||
| 6423434 | S | Propylene glycol dinitrate; PGDN | 0.05 | 0.3 | |||
| 107982 | S | Propylene glycol monomethyl ether | 100 | 360 | 150 | 540 | |
| 108656 | S | Propylene glycol monomethyl ether acetate | 100 | 541 | 150 | 811 | |
| 75558 | S | Propyleneimine; 2-methylaziridine | 2 | 5 | |||
| 75569 | Propylene oxide; 1,2-epoxy-propane | 2 | 4.75 | ||||
| 627134 | n-Propyl nitrate | 25 | 107 | 40 | 170 | ||
| 74997 | Propyne; see Methylacetylene | ||||||
| 8003347 | Pyrethrum | -- | 5 | ||||
| 110861 | Pyridine | 5 | 15 | ||||
| 106514 | Quinone | 0.1 | 0.4 | ||||
| 121824 | RDX; see Cyclonite | ||||||
| Refractory ceramic fiber | 0.2 f/cc(q) | ||||||
| 108463 | Resorcinol | 10 | 45 | 20 | 90 | ||
| 7440166 | Rhodium, metal | -- | 0.1 | ||||
| Insoluble compounds, as Rh | -- | 0.1 | |||||
| Soluble salts, as Rh | -- | 0.001 | |||||
| 299843 | Ronnel; o,o-dimethyl o-(2,4,5-trichlorophenyl) phosphorothioite | -- | 10 | ||||
| Rosin core solder, pyrolysis products, as formaldehyde | -- | 0.1 | |||||
| 83794 | Rotenone, commercial | -- | 5 | ||||
| 1309371 | Rouge; see Particulates not otherwise regulated | ||||||
| Rubber solvent (Naphtha) | 400 | 1,600 | |||||
| Selenium compounds, as Se | -- | 0.2 | |||||
| 7783791 | Selenium hexafluoride | 0.05 | 0.4 | ||||
| 136787 | Sesone; sodium 2,4-dichloro-phenoxyethyl sulfate | ||||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| 61790532 | Silica, amorphous Diatomaceous earth | ||||||
| Total dust | -- | 6 | |||||
| Respirable fraction(n) | -- | 3 | |||||
| Precipitated and gel | -- | 6 | |||||
| Silica, crystalline, respirable dust(n) | |||||||
| 14464461 | Cristobalite, | -- | 0.05 | ||||
| (see also Sections 1532.3 & 5204) | |||||||
| 14808607 | Quartz, | -- | 0.05 | ||||
| (see also Sections 1532.3 & 5204) | |||||||
| 60676860 | Silica, fused, respirable dust | -- | 0.1 | ||||
| 15468323 | Tridymite, | -- | 0.05 | ||||
| (see also Sections 1532.3 & 5204) | |||||||
| 1317959 | Tripoli, (as quartz) | -- | 0.05 | ||||
| (see also Sections 1532.3 & 5204) | |||||||
| Silicates ( <1% crystalline silica) | |||||||
| 12001262 | Mica (respirable dust) | -- | 3 | ||||
| Soapstone, total dust | -- | 6 | |||||
| Soapstone, respirable dust | -- | 3 | |||||
| Talc (containing asbestos); see Section 5208 | |||||||
| 14807966 | Talc (containing no asbestos fibers), respirable dust | -- | 2 | ||||
| Tremolite (containing no asbestos fibers), respirable dust | -- | 2 | |||||
| 7440213 | Silicon; see Particulates not otherwise regulated | ||||||
| 409212 | Silicon carbide; SiC; see Particulates not otherwise regulated | ||||||
| 7803625 | Silicon tetrahydride; silane | 5 | 7 | ||||
| 7440224 | Silver metal, as Ag | -- | 0.01 | ||||
| Silver, soluble compounds, as Ag | -- | 0.01 | |||||
| Soapstone, see Silicates | |||||||
| 26628228 | S | Sodium azide | 0.1 | 0.3 | C | ||
| 7631905 | Sodium bisulfite | -- | 5 | ||||
| 136787 | Sodium 2,4-dichlorophenoxyethyl sulfate; see Sesone | ||||||
| 62748 | S | Sodium fluoroacetate | -- | 0.05 | -- | 0.15 | |
| 1310732 | Sodium hydroxide; caustic soda | -- | 2 | C | |||
| 7681574 | Sodium metabisulfite | -- | 5 | ||||
| 822162 | Sodium stearate | -- | 10 | ||||
| 9005258 | Starch; see Particulates not otherwise regulated | ||||||
| 7789062 | Strontium chromate, as Cr (see also Sections 1532.2, 5206 & 8359) Stearates; see specific compound | -- | 0.0005 | ||||
| 7803523 | Stibine; SbH$3 | 0.1 | 0.5 | ||||
| 8052413 | Stoddard solvent | 100 | 525 | ||||
| 57249 | Strychnine | -- | 0.15 | ||||
| 100425 | S | Styrene (monomer); phenylethylene | 50 | 215 | 500 ppm | 100 | 425 |
| 9014011 | Subtilisins (as pure crystalline proteolytic enzymes) | -- | 0.00006(r) | ||||
| 57501 | Sucrose; see Particulates not otherwise regulated | ||||||
| 74222972 | Sulfometuron methyl | -- | 3.5 | ||||
| 3689245 | S | Sulfotep; tetraethyl dithionopyrophosphate | 0.2 | ||||
| 7446095 | Sulfur dioxide | 2 | 5 | 5 | 10 | ||
| 2551624 | Sulfur hexafluoride | 1,000 | 6,000 | ||||
| 7664939 | Sulfuric acid | -- | 0.1 | -- | 3 | ||
| 10025679 | Sulfur monochloride; S$2Cl$2 | 1 | 6 | C | |||
| 5714227 | Sulfur pentafluoride; S$2F$10 | 0.01 | 0.1 | C | |||
| 7783600 | Sulfur tetrafluoride | 0.1 | 0.4 | C | |||
| 2699798 | Sulfuryl fluoride; SO$2F$2 | 5 | 20 | 10 | 40 | ||
| 35400432 | Sulprofos | 1 | |||||
| 93765 | 2,4,5-T;2,4,5-trichlorophenoxyacetic acid Talc; see Silicates | -- | 10 | ||||
| 7440257 | Tantalum metal dust, as Ta | -- | 5 | ||||
| 1314610 | Tantalum oxide dust, as Ta | -- | 5 | ||||
| 78308 | TCP; see Triorthocresyl phosphate | ||||||
| 584849 | TDI; see Toluene-2,4-diisocyanate | ||||||
| 3689245 | S | TEDP; see Sulfotep | |||||
| Tellurium and compounds, as Te | -- | 0.1 | |||||
| 7783804 | Tellurium hexafluoride | 0.02 | 0.2 | ||||
| 3383968 | Temephos; o,o,o' ,o'-tetramethyl o,o'-thiodi-p-phenylene phosphorothioate Total dust | -- | 10 | ||||
| Respirable fraction(n) | -- | 5 | |||||
| 107493 | S | TEPP; tetraethyl pyrophosphate; | 0.004 | 0.05 | |||
| 100210 | Terephthalic acid | -- | 10 | ||||
| Terphenyls | 0.5 | 5 | C | ||||
| 79276 | 1,1,2,2-Tetrabromoethane; see Acetylene tetrabromide | ||||||
| 76119 | 1,1,1,2-Tetrachloro-2,2-difluoroethane | 500 | 4170 | ||||
| 76120 | 1,1,2,2-Tetrachloro-1,2-difluoroethane; fluorocarbon 112 | 500 | 4,170 | ||||
| 79345 | S | 1,1,2,2-Tetrachloroethane; acetylene tetrachloride | 1 | 7 | |||
| 127184 | Tetrachloroethylene; see Perchloroethylene | ||||||
| 56235 | Tetrachloromethane; see Carbon tetrachloride | ||||||
| 1335882 | S | Tetrachloronaphthalene | -- | 2 | |||
| 3689245 | Tetraethyl dithionopyrophosphate; see Sulfotep | ||||||
| 78002 | S | Tetraethyl lead; tetraethylplumbane, as Pb | -- | 0.075 | |||
| 107493 | Tetraethyl pyrophosphate; see TEPP | ||||||
| 109999 | Tetrahydrofuran | 200 | 590 | 250 | 735 | ||
| 75741 | S | Tetramethyl lead; tetramethylplumbane, as Pb | -- | 0.075 | |||
| 115775 | Tetramethylolmethane; see Pentaerythritol | ||||||
| 3333526 | S | Tetramethyl succinonitrile (decomposition product of 2,2'-azobisisobutyronitrile) | 0.5 | 3 | |||
| 137268 | Tetramethyl thiuram disulfide, see Thiram | ||||||
| 509148 | Tetranitromethane | 0.005 | 0.04 | ||||
| 7722885 | Tetrasodium pyrophosphate | -- | 5 | ||||
| 479458 | S | Tetryl; 2,4,6-trinitrophenylmethylnitramine | -- | 1.5 | |||
| S | Thallium, soluble compounds, as Tl | -- | 0.1 | ||||
| 109999 | THF; see Tetrahydrofuran | ||||||
| 96695 | 4,4'-Thiobis(6-tert-butyl-m-cresol | -- | |||||
| Total dust | -- | 10 | |||||
| Respirable fraction(n) | -- | 5 | |||||
| 68111 | S | Thioglycolic acid | 1 | 3.8 | |||
| 7719097 | Thionyl chloride | 1 | 5 | C | |||
| 137268 | Thiram; bis(dimethylthiocarbamoyl) disulfide | -- | 5 | ||||
| S | Tin, organic compounds, as Sn | -- | 0.1 | -- | 0.2 | ||
| 21651194 | Tin, tin oxide and inorganic compounds, except SnH$4, as Sn | -- | 2 | ||||
| 13463677 | Titanium dioxide, as Ti; see Particulates not otherwise regulated | ||||||
| 137268 | TMTD; see Thiram | ||||||
| 118967 | TNT; see 2,4,6-Trinitrotoluene | ||||||
| 108883 | S | Toluene; toluol | 10 | 37 | 500 ppm | 150 | 560 |
| 584849 | Toluene-2,4-diisocyanate; TDI | 0.005 | 0.04 | 0.02 ppm | 0.02 | 0.15 | |
| 108441 | S | m-Toluidine | 2 | 9 | |||
| 95534 | S | o-Toluidine; o-methylaniline | 2 | 9 | |||
| 106490 | S | p-Toluidine | 2 | 9 | |||
| 8001352 | Toxaphene; see Chlorinated camphene | ||||||
| 115866 | Tpp; see Triphenyl phosphate | ||||||
| Tremolite, nonasbestiform; see Silicates | |||||||
| 75252 | Tribromomethane; see Bromoform | ||||||
| 126738 | Tributyl phosphate | 0.2 | 2.5 | ||||
| 76039 | Trichloroacetic acid | 1 | 5 | ||||
| 120821 | 1,2,4-Trichlorobenzene | 5 | 40 | C | |||
| 50293 | 1,1,1,-Trichloro-2,2-bis(p-chlorophenyl)ethane; see DDT | ||||||
| 71556 | 1,1,1-Trichloroethane; see Methyl chloroform | ||||||
| 79005 | S | 1,1,2-Trichloroethane | 10 | 45 | |||
| 79016 | Trichloroethylene; trichloro-ethene | 25 | 135 | 300 ppm | 100 | 537 | |
| 75694 | Trichlorofluoromethane; Fluorocarbon 11 | 1,000 | 5,600 | C | |||
| 67663 | Trichloromethane; see Chloroform | ||||||
| 594423 | Trichloromethanethiol; see Perchloromethyl mercaptan | ||||||
| 1321659 | S | Trichloronaphthalene | -- | 5 | |||
| 76062 | Trichloronitromethane; see Chloropicrin | ||||||
| 93765 | 2,4,5-Trichlorophenoxyacetic acid see 2,4,5-T | ||||||
| 96184 | 1,2,3-Trichloropropane | 10 | 60 | ||||
| 76131 | 1,1,2-Trichloro-1,2,2-trifluoroethane | 1000 | 7600 | 2000 ppm | 1250 | 9500 | |
| 78308 | Tricresyl phosphate; see Triorthocresyl phosphate | ||||||
| 13121705 | Tricyclohexyltin hydroxide; see Cyhexatin | ||||||
| 102716 | Triethanolamine | -- | 5 | ||||
| 121448 | S | Triethylamine | 1 | 4.1 | C | ||
| 112492 | S | Triethylene glycol dimethyl ether, Triglyme | 5 | 36 | |||
| 75638 | Trifluorobromomethane | 1,000 | 6,100 | ||||
| 2451629 | 1,3,5-Triglycidyl-s-triazinetrione | 0.005 | |||||
| 552307 | Trimellitic anhydride | 0.005 | 0.04 | C | |||
| 75503 | Trimethylamine | 5 | 12 | 15 | 36 | ||
| Trimethylbenzene, all isomers | 25 | 125 | |||||
| 121459 | Trimethyl phosphite | 2 | 10 | ||||
| 88891 | 2,4,6-Trinitrophenol; see Picric acid | ||||||
| 479458 | 2,4,6-Trinitrophenylmethyl nitramine; see Tetryl | ||||||
| 118967 | S | 2,4,6-Trinitrotoluene; TNT | -- | 0.5 | |||
| 78308 | S | Triorthocresyl phosphate | -- | 0.1 | |||
| 603349 | Triphenylamine | -- | 5 | ||||
| 115866 | S | Triphenyl phosphate; TPP | -- | 3 | |||
| 7440337 | Tungsten metal, as W | -- | 5 | ||||
| Tungsten, insoluble compounds, as W | -- | 5 | -- | 10 | |||
| Tungsten, soluble compounds, as W | -- | 1 | -- | 3 | |||
| 8006642 | Turpentine | 100 | 560 | ||||
| Uranium (natural), insoluble compounds, as U | -- | 0.2 | -- | 0.6 | |||
| Uranium (natural), soluble compounds, as U | -- | 0.05 | |||||
| 110623 | Valeraldehyde | 50 | 175 | ||||
| 1314621 | Vanadium pentoxide (V$2O$5), respirable dust and fume | -- | 0.05 | ||||
| 75014 | S | VC; see Vinyl chloride, Section 5210 | |||||
| Vegetable oil mists (except castor, cashew nut or similar irritant oils); see Particulates not otherwise regulated | |||||||
| 108054 | Vinyl acetate | 10 | 30 | 15 | 45 | ||
| 100425 | Vinylbenzene; see Styrene | ||||||
| 593602 | Vinyl bromide; bromoethylene | 0.1 | 0.44 | ||||
| 75014 | S | Vinyl chloride, see Section 5210 | 1 | ||||
| 107131 | S | Vinyl cyanide, see Acrylonitrile, Section 5213 | |||||
| 100403 | S | 4-Vinyl cyclohexene | 0.1 | 0.4 | |||
| 106876 | S | Vinyl cyclohexene dioxide | 0.1 | 0.57 | |||
| 75025 | Vinyl fluoride | 0.2 | 0.38 | ||||
| 75354 | Vinylidene chloride; 1,1-dichloroethylene | 1 | 4 | ||||
| 75387 | Vinylidene fluoride | 100 | 262 | ||||
| 25013154 | Vinyltoluene | 50 | 240 | ||||
| 8030306 | VM & P (Varnish Makers and Painters) Naphtha | 300 | 1,350 | 400 | 1800 | ||
| 81812 | Warfarin; 3-(alpha-acetonyl-benzyl)-4-hydroxycoumarin | -- | 0.1 | ||||
| Welding fumes; total particulates (see also individual constituents) | -- | 5 | |||||
| Wood dust | -- | ||||||
| All soft and hard woods, except Western red cedar | -- | 2 | -- | 5 | |||
| Wood dust, Western red cedar | -- | 0.5 | |||||
| 1330207 | Xylene; xylol; dimethylbenzene | 100 | 435 | 300 ppm | 150 | 655 | |
| 1477550 | S | m-Xylene-a,a'-diamine | -- | 0.1 | C | ||
| 1300738 | S | Xylidine; aminodimethylbenzene | 0.5 | 2.5 | |||
| Yttrium compounds, as Y | -- | 1 | |||||
| 7646857 | Zinc chloride fume | -- | 1 | -- | 2 | ||
| 13530659 | Zinc chromate, as Cr | -- | 0.005 | ||||
| (see also Sections 1532.2, 5206 & 8359) | |||||||
| 15930946 | Zinc chromate hydroxide, as Cr | -- | 0.005 | ||||
| (see also Sections 1532.2, 5206 & 8359) | |||||||
| 1314132 | Zinc oxide fume | -- | 5 | -- | 10 | ||
| Zinc oxide dust, see Particulates not otherwise regulated | |||||||
| 11103869 | Zinc potassium chromate, as Cr | -- | 0.005 | ||||
| (see also Sections 1532.2, 5206 & 8359) | |||||||
| 557051 | Zinc stearate | -- | 10 | ||||
| 37300235 | Zinc yellow, as Cr | -- | 0.005 | ||||
| (see also Sections 1532.2, 5206 & 8359) | |||||||
| Zirconium compounds, as Zr | -- | 5 | -- | 10 | |||
| Footnotes (a) through (u) at end of Table AC-1. | |||||||
__________
Footnotes to Table AC-1
(a) The Chemical Abstracts Service Registry
Number is a designation used to identify a specific compound or substance
regardless of the naming system; these numbers were obtained from the Desk Top
Analysis Tool for the Common Data Base and from the Chemical Abstracts
Indexes.
(b) Refer to section
5155(d) for the
significance of the Skin notation.
(c) Trade Names Removed from Table AC-1.
| Trade Name | Chemical/Generic Name |
| Abate | see Temephos |
| Ammate | see Ammonium Sulfamate |
| Aqualin | see Acrolein |
| Arasan | see Thiram |
| Azodrin | see Moncrotophos |
| Baygon | see Propoxur |
| Bidrin | see Dicrotophos |
| Butyl Cellosolve | see 2-Butoxyethanol |
| Cellosolve | see 2-Ethoxyethanol |
| Cellosolve Acetate | see 2-Ethoxyethyl acetate |
| Compound 1080 | see Sodium Fluoracetate |
| Coyden | see Clopidol |
| Crag Herbicide | see Sesone |
| Cythion | see Malathion |
| Dasanit | see Fensulfothion |
| Delnav | see Dioxathion |
| Dibrom | see Naled |
| Difolatan | see Captafol |
| Disyston | see Disulfoton |
| Dowtherm A | see Phenylether and Biphenyl |
| Dursban | see Chloropyrifos |
| Dyfonate | see Fonofos |
| Fermate | see Ferbam |
| Freons | see Fluorocarbons |
| Furadan | see Carbofuran |
| Guthion | see Azinphos Methyl |
| Korlan | see Ronnel |
| Lannate | see Methomyl |
| Mariate | see Methoxychlor |
| MLT | see Malathion |
| Moxie | see Methoxychlor |
| Nialate | see Ethion |
| Nankor | see Ronnel |
| Phosdrin | see Mevinphos |
| Pival | see Pindone |
| Plictran | see Cyhexatin |
| Santobrite | see Pentachlorophenol |
| Sevin | see Carbaryl |
| Systox | see Demeton |
| Teflon | see Polytetrafluoroethylene |
| Thimet | see Phorate |
| Thiodan | see Endosulfan |
| Tordon | see Picloram |
| Trolene | see Ronnel |
| Vapona | see Dichlorvos |
| Weedone 638 | see 2, 4-D |
| Zoalene | see Dinitolmide |
(d) For the definition and the application of
the Permissible Exposure Limit (PEL), refer to section
5155(b) and
(c)(1).
(e) Parts of gas or vapor per million parts
of air by volume at 25oC and 760mm Hg pressure.
(f) Milligrams of substance per cubic meter
of air at 25oC and 760mm Hg pressure.
(g) Refer to section
5155(b) and (c)(3)
for the significance of the Ceiling notation. A "C" notation in this column
means the values given in the PEL columns are ceiling values. A numerical entry
in this column represents a ceiling value in addition to the TWA
values.
(h) A number of gases and
vapors, when present in high concentrations, act primarily as asphyxiants
without other adverse effects. A concentration limit is not included for each
material because the limiting factor is the available oxygen. (Several of these
materials present fire or explosion hazards.)
(i) Coal tar pitch volatiles (benzene or
cyclohexane-soluble fraction) include fused polycyclic hydrocarbons (some of
which are known carcinogens) which volatilize from the distillation residues of
coal, petroleum (excluding asphalt), wood, and other organic matter. Asphalt
(CAS 8052-42-4, and CAS 64742-93-4) is not covered under the "coal tar pitch
volatiles" standard.
(j) This
standard applies to the cotton waste processing operations of waste recycling
(sorting, blending, cleaning, and willowing) and garnetting. It does not apply
to cotton gins, cottonseed oil industry, or operations covered by section
5190.
(k) A PEL of 0.05 ppm shall apply to
exposures involving a mixture of ethylene glycol dinitrate and
nitroglycerin.
(l) As sampled by
method that does not collect vapor.
(m) Thermal decomposition of the fluorocarbon
chain in air leads to the formation of oxidized products containing carbon,
fluorine and oxygen. An index of exposure to these products is possible through
their alkaline hydrolysis followed by a quantitative determination of fluoride
content. No particular concentration limit is specified pending evaluation of
the toxicity of the products but concentrations should be kept below the
sensitivity of the analytical method.
(n) The concentration and percentage of the
particulate used for this limit are determined from the fraction passing a size
selector with the following characteristics:
| Aerodynamic Diameter in Micrometers (unit density sphere) | Percent Passing Selector | |||
| 0 | 100 | |||
| 1 | 97 | |||
| 2 | 91 | |||
| 3 | 74 | |||
| 4 | 50 | |||
| 5 | 30 | |||
| 6 | 17 | |||
| 7 | 9 | |||
| 8 | 5 | |||
| 10 | 1 | |||
(o) Refer to sections
5155(b) and (c)(2)
for the definition and application of the Short Term Exposure Limit
(STEL).
(p) (Reserved)
(q) Fibers per cubic centimeter of air at
25oC and 760mm Hg pressure. To be considered a fiber for this limit, the
particle must be longer than 5µm, have a length to diameter ratio of
three or more, and have a diameter less than 3µm. The National Institute
for Occupational Safety and Health (NIOSH), Method 7400, Issue 2, August 15,
1994, which is hereby incorporated by reference, shall be used for measuring
airborne fiber concentrations.
(r)
Compliance with the subtilisins PEL is assessed by sampling with a high volume
sampler (600-800 liters per minute) for at least 60 minutes.
(s) The concentration and percentage of the
particulate used for this limit are determined from the fraction passing a size
selector with the following characteristics:
| Aerodynamic Diameter in Micrometers (unit density sphere) | Percent Passing Selector | ||
| 0.......................... | 100 | ||
| 1.......................... | 97 | ||
| 2.......................... | 94 | ||
| 5.......................... | 87 | ||
| 10.......................... | 77 | ||
| 20.......................... | 65 | ||
| 30.......................... | 58 | ||
| 40.......................... | 54.5 | ||
| 50.......................... | 52.2 | ||
| 100.......................... | 50 | ||
(t) Glutaraldehyde can cause occupational
asthma and skin sensitization responses such as contact dermatitis. Exposure
related symptoms may include one or more of the following: shortness of breath,
chest tightness, wheeze, cough, skin rash, hives, and irritation of the nose,
throat, skin or eye. Hazard communication training required by sections
5191 or
5194 shall address these health
hazards and symptoms along with the measures taken by the employer to evaluate
and control exposures that can include medical evaluations, exposure
monitoring, ventilation systems, work practices, and personal protective
equipment. The communication system required by section
3203 shall inform employees where
to report possible health symptoms and where to ask questions, report concerns,
and receive information about the employer's evaluation and control
measures.
(u) This PEL applies to
the sum of the exposures to the substance in the vapor state and from the
particulate fraction specified in footnote (s) in this
table.
Notes
2. Amendment of Table AC-1 filed 3-8-84; effective thirtieth day thereafter (Register 84, No. 10).
3. Amendment of Tables AC-2 and AC-3 filed 8-30-84; effective thirtieth day thereafter (Register 84, No. 35).
4. Amendment of Table AC-2 filed 9-26-84; effective thirtieth day thereafter (Register 84, No. 39).
5. Amendment of Table AC-3 filed 12-13-84; effective thirtieth day thereafter (Register 84, No. 50).
6. Amendment of Table AC-1 filed 1-16-85; effective thirtieth day thereafter (Register 85, No. 3).
7. Editorial correction of printing error of mppcf designation for Talc (fibrous, nonfibrous and mixtures) in Table AC-3 (Register 85, No. 12).
8. Amendment of Table AC-1 and footnote (j) filed 11-21-86; effective thirtieth day thereafter (Register 86, No.47).
9. Amendment of subsection (c), (d), (f), Tables AC-1, AC-2 and AC-3 filed 2-3-87; effective thirtieth day thereafter (Register 87, No. 6).
10. Amendment filed 7-26-90; operative 8-25-90 (Register 91, No. 1).
11. Amendment of Table AC-1 and footnotes to Table AC-1 filed 11-21-90; operative 12-21-90 (Register 91, No. 1).
12. Editorial correction of graphic correcting spelling of Beryllium and adding measurements omitted (Register 91, No. 23).
13. Amendment of Table AC-1 and NOTE filed 4-7-92; operative 5-7-92 (Register 92, No. 14).
14. Editorial correction of printing error repositioning Grain dust (Register 92, No. 34).
15. Amendment of Table AC-1 filed 3-3-93; operative 4-2-93 (Register 93, No. 11).
16. Amendment of Table AC-1 filed 4-30-93; operative 5-31-93 (Register 93, No. 18).
17. Change without regulatory effect amending Table AC-1 Formaldehyde filed 12-7-94 pursuant to section 100, title 1, California Code of Regulations (Register 94, No. 49).
18. Amendment of subsections (a)(2) and (c)(2)(B) and Table AC-1 filed 4-3-95; operative 5-3-95 (Register 95, No. 14).
19. Editorial corrections (Register 95, No. 24).
20. Change without regulatory effect amending Table AC-1 filed 6-12-95 pursuant to section 100, title 1, California Code of Regulations (Register 95, No. 24).
21. Change without regulatory effect amending Table AC-1 filed 6-29-95 pursuant to section 100, title 1, California Code of Regulations (Register 95, No. 26).
22. Editorial correction repositioning "Particulates not otherwise regulated" (Register 95, No. 35).
23. Amendment of Table AC-1 (1,3 Butadiene) filed 5-29-97; operative 8-27-97 (Register 97, No. 22).
24. Amendment of Table AC-1 (methylene chloride) filed 8-4-97; operative 11-2-97 (Register 97, No. 32).
25. Change without regulatory effect amending Table AC-1 (silver) filed 1-6-98 pursuant to section 100, title 1, California Code of Regulations (Register 98, No. 2).
26. Change without regulatory effect amending table AC-1 filed 2-16-2000 pursuant to section 100, title 1, California Code of Regulations (Register 2000, No. 7).
27. Change without regulatory effect repealing Appendix footnote (q) filed 6-27-2000 pursuant to section 100, title 1, California Code of Regulations (Register 2000, No. 26).
28. Editorial correction of placement of appendix footnote (h) reference (Register 2000, No. 51).
29. Change without regulatory effect amending subsection (c)(1)(B) and amending appendix filed 12-21-2000 pursuant to section 100, title 1, California Code of Regulations (Register 2000, No. 51).
30. Amendment of Table AC-1 filed 1-4-2001; operative 2-3-2001 (Register 2001, No. 1).
31. Editorial correction of Table AC-1, entries for styrene, sulfometuron methyl and 4-vinyl cyclohexene (Register 2001, No. 24).
32. Change without regulatory effect amending Table AC-1 entry for dicyclohexylmethane-4,4'-diisocyanate filed 7-19-2001 pursuant to section 100, title 1, California Code of Regulations (Register 2001, No. 29).
33. Editorial correction of Table AC-1, entries for aluminum alkyls, 4,4'-diaminobiphenyl, 2,6-Di-tert-butyl-p-cresol, rubber solvent, TEPP and tetramethyl thiuram disulfide (Register 2001, No. 49).
34. Change without regulatory effect amending appendix and Table AC-1 filed 1-17-2002 pursuant to section 100, title 1, California Code of Regulations (Register 2002, No. 3).
35. Amendment of Table AC-1 filed 10-1-2004; operative 10-31-2004 (Register 2004, No. 40).
36. Amendment of Table AC-1, including new footnote (s), filed 10-4-2004; operative 11-3-2004 (Register 2004, No. 41).
37. Amendment of Table AC-1, including new footnotes (t) and (u), filed 6-6-2006; operative 7-6-2006. (The ceiling limit of 0.05 ppm for Glutaraldehyde will take effect 7-6-2008) (Register 2006, No. 23).
38. Editorial correction of Table AC-1, Beryllium and Methyl 2-cyanoacrylate (Register 2006, No. 29).
39. Amendment of subsection (a)(2) and amendment of Table AC-1 filed 9-19-2006; operative 9-19-2006. Submitted to OAL for printing only pursuant to Labor Code section 142.3(a)(3) (Register 2006, No. 38).
40. Editorial correction of Table AC-1--Methyl chloride (Register 2007, No. 32).
41. Change without regulatory effect repealing Table AC-1 footnote u filed 9-23-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 39).
42. Editorial correction of Table AC-1, footnote (k) (Register 2009, No. 21).
43. Amendment of Table AC-1 and footnotes (n) and (q) and new footnote (u) filed 2-3-2010; operative 8-3-2010 (Register 2010, No. 6).
44. Change without regulatory effect amending Table AC-1 filed 5-31-2011 pursuant to section 100, title 1, California Code of Regulations (Register 2011, No. 22).
45. Change without regulatory effect amending Table AC-1, footnote (n) filed 1-24-2012 pursuant to section 100, title 1, California Code of Regulations (Register 2012, No. 4).
46. Amendment of Table AC-1 filed 2-16-2012; operative 3-17-2012 (Register 2012, No. 7).
47. Editorial correction of Table AC-1 (Register 2012, No. 37).
48. Amendment of Table AC-1, entry for ethylbenzene, filed 8-27-2013; operative 10-1-2013 (Register 2013, No. 35).
49. Editorial correction of Table AC-1 entry for 1,2-Dibromoethane (Register 2013, No. 50).
50. Amendment of Table AC-1 adding new entry for N-Methylpyrrolidone filed 1-7-2014; operative 4-1-2014 (Register 2014, No. 2).
51. Amendment of Table AC-1 entry for naphthalene filed 6-24-2014; operative 10-1-2014 (Register 2014, No. 26).
52. Amendment of Table AC-1 entry for hydrogen chloride filed 11-26-2014; operative 1-1-2015 (Register 2014, No. 48).
53. Amendment of Table AC-1 filed 10-17-2016; operative 10-17-2016. Submitted to OAL for filing and printing only pursuant to Labor Code section 142.3(a)(3) (Register 2016, No. 43).
54. Editorial correction of Table AC-1 (Register 2017, No. 12).
55. Amendment of Table AC-1 (entries for Wood dust and Wood dust, Western red cedar) filed 4-4-2017; operative 7-1-2017 (Register 2017, No. 14).
56. Amendment of Table AC-1 (entry for beryllium) filed 10-2-2017; operative 10-2-2017 pursuant to Labor Code section 142.3. Submitted to OAL for filing and printing only pursuant to Labor Code section 142.3(a)(4) (Register 2017, No. 40).
57. Amendment of Table AC-1 (entry for benzyl chloride) filed 12-5-2017; operative 4-1-2018 (Register 2017, No. 49).
58. Editorial correction of Table AC-1 (glycol monomethyl ether) (Register 2023, No. 29).
Note: Authority cited: Section 142.3, Labor Code. Reference: Sections 142.3 and 144.6, Labor Code.
2. Amendment of Table AC-1 filed 3-8-84; effective thirtieth day thereafter (Register 84, No. 10).
3. Amendment of Tables AC-2 and AC-3 filed 8-30-84; effective thirtieth day thereafter (Register 84, No. 35).
4. Amendment of Table AC-2 filed 9-26-84; effective thirtieth day thereafter (Register 84, No. 39).
5. Amendment of Table AC-3 filed 12-13-84; effective thirtieth day thereafter (Register 84, No. 50).
6. Amendment of Table AC-1 filed 1-16-85; effective thirtieth day thereafter (Register 85, No. 3).
7. Editorial correction of printing error of mppcf designation for Talc (fibrous, nonfibrous and mixtures) in Table AC-3 (Register 85, No. 12).
8. Amendment of Table AC-1 and footnote (j) filed 11-21-86; effective thirtieth day thereafter (Register 86, No.47).
9. Amendment of subsection (c), (d), (f), Tables AC-1, AC-2 and AC-3 filed 2-3-87; effective thirtieth day thereafter (Register 87, No. 6).
10. Amendment filed 7-26-90; operative 8-25-90 (Register 91, No. 1).
11. Amendment of Table AC-1 and footnotes to Table AC-1 filed 11-21-90; operative 12-21-90 (Register 91, No. 1).
12. Editorial correction of graphic correcting spelling of Beryllium and adding measurements omitted (Register 91, No. 23).
13. Amendment of Table AC-1 and NOTE filed 4-7-92; operative 5-7-92 (Register 92, No. 14).
14. Editorial correction of printing error repositioning Grain dust (Register 92, No. 34).
15. Amendment of Table AC-1 filed 3-3-93; operative 4-2-93 (Register 93, No. 11).
16. Amendment of Table AC-1 filed 4-30-93; operative 5-31-93 (Register 93, No. 18).
17. Change without regulatory effect amending Table AC-1 Formaldehyde filed 12-7-94 pursuant to section 100, title 1, California Code of Regulations (Register 94, No. 49).
18. Amendment of subsections (a)(2) and (c)(2)(B) and Table AC-1 filed 4-3-95; operative 5-3-95 (Register 95, No. 14).
19. Editorial corrections (Register 95, No. 24).
20. Change without regulatory effect amending Table AC-1 filed 6-12-95 pursuant to section 100, title 1, California Code of Regulations (Register 95, No. 24).
21. Change without regulatory effect amending Table AC-1 filed 6-29-95 pursuant to section 100, title 1, California Code of Regulations (Register 95, No. 26).
22. Editorial correction repositioning "Particulates not otherwise regulated" (Register 95, No. 35).
23. Amendment of Table AC-1 (1,3 Butadiene) filed 5-29-97; operative 8-27-97 (Register 97, No. 22).
24. Amendment of Table AC-1 (methylene chloride) filed 8-4-97; operative 11-2-97 (Register 97, No. 32).
25. Change without regulatory effect amending Table AC-1 (silver) filed 1-6-98 pursuant to section 100, title 1, California Code of Regulations (Register 98, No. 2).
26. Change without regulatory effect amending table AC-1 filed 2-16-2000 pursuant to section 100, title 1, California Code of Regulations (Register 2000, No. 7).
27. Change without regulatory effect repealing Appendix footnote (q) filed 6-27-2000 pursuant to section 100, title 1, California Code of Regulations (Register 2000, No. 26).
28. Editorial correction of placement of appendix footnote (h) reference (Register 2000, No. 51).
29. Change without regulatory effect amending subsection (c)(1)(B) and amending appendix filed 12-21-2000 pursuant to section 100, title 1, California Code of Regulations (Register 2000, No. 51).
30. Amendment of Table AC-1 filed 1-4-2001; operative 2-3-2001 (Register 2001, No. 1).
31. Editorial correction of Table AC-1, entries for styrene, sulfometuron methyl and 4-vinyl cyclohexene (Register 2001, No. 24).
32. Change without regulatory effect amending Table AC-1 entry for dicyclohexylmethane-4,4i-diisocyanate filed 7-19-2001 pursuant to section 100, title 1, California Code of Regulations (Register 2001, No. 29).
33. Editorial correction of Table AC-1, entries for aluminum alkyls, 4,4'-diaminobiphenyl, 2,6-Di-tert-butyl-p-cresol, rubber solvent, TEPP and tetramethyl thiuram disulfide (Register 2001, No. 49).
34. Change without regulatory effect amending appendix and Table AC-1 filed 1-17-2002 pursuant to section 100, title 1, California Code of Regulations (Register 2002, No. 3).
35. Amendment of Table AC-1 filed 10-1-2004; operative 10-31-2004 (Register 2004, No. 40).
36. Amendment of Table AC-1, including new footnote (s), filed 10-4-2004; operative 11-3-2004 (Register 2004, No. 41).
37. Amendment of Table AC-1, including new footnotes (t) and (u), filed 6-6-2006; operative 7-6-2006. (The ceiling limit of 0.05 ppm for Glutaraldehyde will take effect 7-6-2008) (Register 2006, No. 23).
38. Editorial correction of Table AC-1, Beryllium and Methyl 2-cyanoacrylate (Register 2006, No. 29).
39. Amendment of subsection (a)(2) and amendment of Table AC-1 filed 9-19-2006; operative 9-19-2006. Submitted to OAL for printing only pursuant to Labor Code section 142.3(a)(3) (Register 2006, No. 38).
40. Editorial correction of Table AC-1 - Methyl chloride (Register 2007, No. 32).
41. Change without regulatory effect repealing Table AC-1 footnote u filed 9-23-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 39).
42. Editorial correction of Table AC-1, footnote (k) (Register 2009, No. 21).
43. Amendment of Table AC-1 and footnotes (n) and (q) and new footnote (u) filed 2-3-2010; operative 8-3-2010 (Register 2010, No. 6).
44. Change without regulatory effect amending Table AC-1 filed 5-31-2011 pursuant to section 100, title 1, California Code of Regulations (Register 2011, No. 22).
45. Change without regulatory effect amending Table AC-1, footnote (n) filed 1-24-2012 pursuant to section 100, title 1, California Code of Regulations (Register 2012, No. 4).
46. Amendment of Table AC-1 filed 2-16-2012; operative 3-17-2012 (Register 2012, No. 7).
47. Editorial correction of Table AC-1 (Register 2012, No. 37).
48. Amendment of Table AC-1, entry for ethylbenzene, filed 8-27-2013; operative 10-1-2013 (Register 2013, No. 35).
49. Editorial correction of Table AC-1 entry for 1,2-Dibromoethane (Register 2013, No. 50).
50. Amendment of Table AC-1 adding new entry for N-Methylpyrrolidone filed 1-7-2014; operative 4-1-2014 (Register 2014, No. 2).
51. Amendment of Table AC-1 entry for naphthalene filed 6-24-2014; operative 10-1-2014 (Register 2014, No. 26).
52. Amendment of Table AC-1 entry for hydrogen chloride filed 11-26-2014; operative
53. Amendment of Table AC-1 filed 10-17-2016; operative
54. Editorial correction of Table AC-1 (Register 2017, No. 12).
55. Amendment of Table AC-1 (entries for Wood dust and Wood dust, Western red cedar) filed 4-4-2017; operative
56. Amendment of Table AC-1 (entry for beryllium) filed 10-2-2017; operative
57. Amendment of Table AC-1 (entry for benzyl chloride) filed 12-5-2017; operative
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