Contents
CONTROLLING EXPOSURE
R5.48-1 RE: Chemical and Biological Substances - Exposure Limits
R5.54-1 RE: Chemical and Biological Substances - Controlling Exposure - Exposure Control Plan
Policies Part 5 - Controlling Exposure
Policy Item R5.48-1
RE: Exposure Limits
BACKGROUND
1. Explanatory Notes
Section 5.48 provides established limits for a worker's exposure to hazardous chemical substances. Generally, these exposure limits are established according to the Threshold Limit Values ("TLVs") adopted by the American Conference of Governmental Industrial Hygienists ("ACGIH"). However, the Board has authority to make exceptions and adopt exposure limits for specific chemical substances that are not consistent with the TLVs established by the ACGIH. This policy sets out those exceptions.
2. The Regulation
Section 5.48:
Except as otherwise determined by the Board, the employer must ensure that no worker is exposed to a substance that exceeds the ceiling limit, short-term exposure limit, or 8-hour TWA limit prescribed by ACGIH.
Section 5.57:
(1) If a substance identified as any of the following is present in the workplace, the employer must replace it, if practicable, with a material which reduces the risk to workers:
(a) ACGIH A1 or A2, or IARC 1, 2A or 2B carcinogen;
(b) ACGIH reproductive toxin;
(c) ACGIH sensitizer;
(d) ACGIH L endnote.
(2) If it is not practicable to substitute a material which reduces the risk to workers, in accordance with subsection (1), the employer must implement an exposure control plan to maintain workers' exposure as low as reasonably achievable below the exposure limit established under section 5.48.
(3) The exposure control plan must meet the requirements of section 5.54.
3. Preamble to Policy
The following is a preamble to be applied to those exposure limits developed by the Board as an exception to the TLVs established by the ACGIH:
An exposure limit is a maximum allowed airborne concentration and is not intended to represent a fine line between safe and harmful conditions. In determining an exposure limit, it is not possible to take into account all factors that could influence the effect that exposure to the substance may have on an individual worker. Therefore, for all hazardous substances, regardless of any assigned exposure limit, the guiding principle is elimination of exposure or reduction to the lowest level that is reasonably achievable below the exposure limit.
Due to a wide variation in individual susceptibility, some workers may experience discomfort from some substances at concentrations at or below the exposure limit. Others may be affected more seriously by aggravation of a pre-existing condition, or by development of an occupational disease. Furthermore, other workplace contaminants may affect an individual's response. The effects of combined chemical exposures are often unknown or poorly defined.
POLICY
1. Table of Exposure Limits for Excluded Substances
As presented in the table below, the Board has determined exposure limits for the following specific substances that differ from the TLVs established by the ACGIH. For solid and liquid particulate matter, except where the terms inhalable, thoracic, or respirable particulate mass are used, the exposure limits listed in the table below are expressed in terms of "total particulate matter".
| Substance/Chemical Name | CAS No. | Unit | 8-hour TWA Limit | Short-term exposure Limit, STEL | Ceiling Limit |
|---|---|---|---|---|---|
| ABATE (TEMEPHOS), TOTAL | 3383-96-8 | mg/m3 | 10 | 20 | |
| ACETAMIDE | 60-35-5 | No BC exposure limit | |||
| ACETONE CYANOHYDRIN | 75-86-5 | ppm | 1 | ||
| ALDICARB | 116-06-3 | No BC exposure limit | |||
| ALLYL AMINE | 107-11-9 | ppm | 2 | ||
| ALLYL BROMIDE | 106-95-6 | No BC exposure limit | |||
| ALLYL METHACRYLATE | 96-05-9 | No BC exposure limit | |||
| ATRAZINE | 1912-24-9 | mg/m3 | 5 | ||
| BENDIOCARB | 22781-23-3 | No BC exposure limit | |||
| BENZYL CHLORIDE | 100-44-7 | ppm | 1 | ||
| BORON TRIBROMIDE | 10294-33-4 | ppm | 1 | ||
| BORON TRICHLORIDE | 10294-34-5 | ppm | No BC exposure limit | ||
| BORON TRIFLUORIDE | 7637-07-2 | ppm | 0.1 | 1 | |
| BORON TRIFLUORIDE ETHERS, as BF3 | 109-63-7, 353-42-4 | ppm | No BC exposure limit | ||
| BROMOCHLOROMETHANE | 74-97-5 | ppm | 200 | 250 | |
| BUTENES, ALL ISOMERS, INCLUDING ISOBUTENE | 106-98-9, 107-01-7, 590-18-1, 624-64-6, 25167-67-3, 115-11-7 |
No BC exposure limit | |||
| n-BUTYL ALCOHOL (n-BUTANOL) | 71-36-3 | ppm | 15 | 30 | |
| n-BUTYL ACETATE | 123-86-4 | ppm | 20 | ||
| sec-BUTYL ACETATE | 105-46-4 | ppm | 200 | ||
| tert-BUTYL ACETATE | 540-88-5 | ppm | 200 | ||
| tert-BUTYL HYDROPEROXIDE | 75-91-2 | No BC exposure limit | |||
| n-BUTYL METHACRYLATE | 97-88-1 | ppm | 50 | ||
| CADUSAFOS | 95465-99-9 | No BC exposure limit | |||
| CALCIUM CARBONATE (incl. LIMESTONE, MARBLE), TOTAL | 1317-65-3 | mg/m3 | 10 | 20 | |
| CALCIUM CHROMATE, as Cr, TOTAL | 13765-19-0 | mg/m3 | 0.001 | ||
| CAPROLACTAM DUST | 105-60-2 | mg/m3 | 1 | 3 | |
| CAPTAFOL | 2425-06-1 | mg/m3 | 0.1 | ||
| CARBARYL | 63-25-2 | mg/m3 | 5 | ||
| CARBON DIOXIDE | 124-38-9 | ppm | 5000 | 15000 | |
| CARBON DISULFIDE | 75-15-0 | ppm | 4 | 12 | |
| CARBON MONOXIDE | 630-08-0 | ppm | 25 | 100 | |
| CARBON TETRACHLORIDE | 56-23-5 | ppm | 2 | ||
| CARFENTRAZONE-ETHYL | 128639-02-1 | No BC exposure limit | |||
| CHLORDANE | 57-74-9 | mg/m3 | 0.5 | ||
| CHLORDANE, INHALABLE FRACTION & VAPOUR | 57-74-9 | mg/m3 | No BC exposure limit | ||
| CHLORINE | 7782-50-5 | ppm | 0.5 | 1 | |
| CHLORINE DIOXIDE | 10049-04-4 | ppm | 0.1 | 0.3 | |
| CHLOROACETIC ACID | 79-11-8 | ppm | 0.3 | ||
| o-CHLOROBENZYLIDENE MALONONITRILE | 2698-41-1 | ppm | 0.05 | ||
| CHLOROBROMOMETHANE (see BROMOCHLOROMETHANE) | 74-97-5 | (See individual exposure limits for BROMOCHLOROMETHANE) | |||
| 1-CHLORO-1,1-DIFLUOROETHANE | 75-68-3 | ppm | 1000 | ||
| CHLORODIFLUOROMETHANE | 75-45-6 | ppm | 500 | 1250 | |
| CHLOROFORM | 67-66-3 | ppm | 2 | ||
| β-CHLOROPRENE | 126-99-8 | ppm | 10 | ||
| CHLOROTRIFLUOROMETHANE | 75-72-9 | ppm | 1000 | ||
| CHROMITE ORE PROCESSING (CHROMATE), as Cr, TOTAL | mg/m3 | 0.05 | |||
| CHROMIUM, METAL, TOTAL | 7440-47-3 | mg/m3 | 0.5 | ||
| CHROMIUM, Cr(III) COMPOUNDS, TOTAL | 7440-47-3 | mg/m3 | 0.5 | ||
| CHROMIUM, INSOLUBLE, Cr(VI) COMPOUNDS, TOTAL | 7440-47-3 | mg/m3 | 0.01 | ||
| CHROMIUM, WATER-SOLUBLE, Cr(VI) COMPOUNDS, TOTAL | 7440-47-3 | mg/m3 | 0.025 | 0.1 | |
| CHROMIUM and INORGANIC COMPOUNDS: | |||||
METALIC CHROMIUM, as Cr(0), INHALABLE | 7440-47-3 | No BC exposure limit | |||
TRIVALENT CHROMIUM COMPOUNDS, as Cr(III), INHALABLE | 7440-47-3 | No BC exposure limit | |||
HEXVALENT CHROMIUM COMPOUNDS, as Cr(VI), INHALABLE | 7440-47-3 | No BC exposure limit | |||
CHROMYL CHLORIDE, as Cr(VI), INHALABLE FRACTION & VAPOUR | 7440-47-3 | No BC exposure limit | |||
CHROMITE ORE PROCESSING (also known as CHROMITE ORE PROCESSING (CHROMATE), as Cr, TOTAL) | mg/m3 | 0.05 | |||
| CHROMYL CHLORIDE, TOTAL | 14977-61-8 | ppm | 0.025 | ||
| CITRAL, INHALABLE | 5392-40-5 | No BC exposure limit | |||
| CLOPIDOL | 2971-90-6 | mg/m3 | 10 | ||
| COBALT and INORGANIC COMPOUNDS, as Co, TOTAL | 7440-48-4 | mg/m3 | 0.02 | ||
| COBALT and INORGANIC COMPOUNDS, as Co, INHALABLE | 7440-48-4 | No BC exposure limit | |||
| CRESOL, ALL ISOMERS | 1319-77-3, 95-48-7, 108-39-4, 106-44-5 |
mg/m3 | 10 | ||
| CUMENE | 98-82-8 | ppm | 25 | 75 | |
| CYANAZINE | 21725-46-2 | No BC exposure limit | |||
| CYANOACRYLATES, ETHYL and METHYL (also known as "ETHYL CYANOACRYLATE" and "METHYL 2-CYANOACRYLATE" respectively) | 7085-85-0, 137-05-3 | (See individual exposure limits for ETHYL CYANOACRYLATE and METHYL 2-CYANOACRYLATE) | |||
| CYANOGEN | 460-19-5 | ppm | 10 | ||
| CYANOGEN BROMIDE | 506-68-3 | No BC exposure limit | |||
| CYCLOPENTADIENE | 542-92-7 | ppm | 75 | ||
| DIBUTYL PHOSPHATE | 107-66-4 | ppm | 1 | 2 | |
| DICHLOROMETHANE | 75-09-2 | ppm | 25 | ||
| DICYCLOHEXYLMETHANE-4,4'-DIISOCYANATE | 5124-30-1 | ppm | 0.005 | 0.01 | |
| DICYCLOPENTADIENE | 77-73-6 | ppm | 5 | ||
| DICYCLOPENTADIENE,including CYCLOPENTADIENE | 77-73-6, 542-92-7 | (See individual exposure limits for CYCLOPENTADIENE and DICYCLOPENTADIENE) | |||
| 2,4-DICHLOROPHENOXYACETIC ACID AND ITS ESTERS | 94-75-7 | mg/m3 | 10 | 20 | |
| DIELDRIN | 60-57-1 | mg/m3 | 0.25 | ||
| DIETHANOLAMINE | 111-42-2 | mg/m3 | 2 | ||
| DIETHYLENE GLYCOL MONOBUTYL ETHER | 112-34-5 | No BC exposure limit | |||
| N,N-DIETHYLHYDROXYLAMINE | 3710-84-7 | No BC exposure limit | |||
| DIISOCYANATES, N.O.S. | ppm | 0.005 | 0.01 | ||
| DIMETHOXYMETHANE | 109-87-5 | ppm | 1000 | 1250 | |
| DIMETHYL ETHER | 115-10-6 | ppm | 1000 | ||
| DIMETHYL SULFATE | 77-78-1 | ppm | 0.1 | ||
| DIMETHYLACETAMIDE (also known as N,N-DIMETHYLACETAMIDE) | 127-19-5 | ppm | 10 | ||
| DIMETHYLFORMAMIDE | 68-12-2 | ppm | 10 | ||
| DIMETHYLPHENOL, ALL ISOMERS | 95-65-8; 95-87-4; 105-67-9; 108-68-9; 526-75-0; 576-26-1; 1300-71-6 |
No BC exposure limit | |||
| DINITROBENZENE, ALL ISOMERS | 99-65-0; 100-25-4; 528-29-0; 25154-54-5 |
ppm | 0.15 | ||
| DINITRO-O-CRESOL | 534-52-1 | mg/m3 | 0.2 | ||
| n-DIOCTYL PHTHALATE | 117-84-0 | mg/m3 | 5 | ||
| ENDOSULFAN | 115-29-7 | mg/m3 | 0.1 | ||
| ENFLURANE | 13838-16-9 | ppm | 2 | ||
| EPICHLOROHYDRIN | 106-89-8 | ppm | 0.1 | ||
| EPN, INHALABLE | 2104-64-5 | mg/m3 | 0.1 | ||
| EPN, INHALABLE FRACTION & VAPOUR | 2104-64-5 | No BC exposure limit | |||
| ETHYL ACETATE | 141-78-6 | ppm | 150 | ||
| ETHYL CYANOACRYLATE | 7085-85-0 | ppm | 0.2 | ||
| ETHYL ISOCYANATE | 109-90-0 | No BC exposure limit | |||
| ETHYL METHACRYLATE | 97-63-2 | ppm | 50 | ||
| ETHYLENE DIBROMIDE | 106-93-4 | ppm | 0.5 | ||
| ETHYLENE DICHLORIDE (1,2-DICHLOROETHANE) | 107-06-2 | ppm | 1 | 2 | |
| ETHYLENE GLYCOL, AEROSOL | 107-21-1 | mg/m3 | 100 | ||
| ETHYLENE GLYCOL, PARTICULATE | 107-21-1 | mg/m3 | 10 | 20 | |
| ETHYLENE GLYCOL, VAPOUR | 107-21-1 | ppm | 50 | ||
| ETHYLENEIMINE | 151-56-4 | ppm | 0.5 | ||
| ETHYLENE OXIDE | 75-21-8 | ppm | 0.1 | 1 | |
| ETHYLIDENE NORBORNENE | 16219-75-3 | ppm | 5 | ||
| FLUDIOXONIL | 131341-86-1 | No BC exposure limit | |||
| FLUORINE | 7782-41-4 | ppm | 0.1 | ||
| FLUORINE, as F | 7782-41-4 | ppm | (See individual exposure limit for FLUORINE) | ||
| FLUOROXENE | 406-90-6 | ppm | 2 | ||
| FOLPET | 133-07-3 | No BC exposure limit | |||
| FURFURYL ALCOHOL | 98-00-0 | ppm | 5 | 10 | |
| GLYCERIN MIST, TOTAL | 56-81-5 | mg/m3 | 10 | ||
| GLYCERIN MIST, RESPIRABLE | 56-81-5 | mg/m3 | 3 | ||
| GYPSUM, TOTAL | 13397-24-5 | mg/m3 | 10 | 20 | |
| HALOTHANE | 151-67-7 | ppm | 2 | ||
| HARD METALS, containing COBALT and TUNGSTEN CARBIDE, as Co | 7440-48-4, 12070-12-1 | mg/m3 | No BC exposure limit | ||
| HEXAMETHYLENE DIISOCYANATE | 822-06-0 | ppm | 0.005 | 0.01 | |
| n-HEXANE | 110-54-3 | ppm | 20 | ||
| HEXANE, ALL ISOMERS except n-HEXANE | 75-83-2, 79-29-8, 96-14-0, 107-83-5 | ppm | 200 | ||
| HYDROGEN FLUORIDE, as F | 7664-39-3 | ppm | 2 | ||
| HYDROGEN SULFIDE | 7783-06-4 | ppm | 10 | ||
| INDENE | 95-13-6 | ppm | 10 | ||
| INDIUM TIN OXIDE, as In | 50926-11-9 | No BC exposure limit | |||
| IODIDES | No BC exposure limit | ||||
| IODINE | 7553-56-2 | ppm | 0.1 | ||
| IRON OXIDE, FUME | 1309-37-1 | mg/m3 | 5 | 10 | |
| IRON PENTACARBONYL | 13463-40-6 | ppm | 0.01 | ||
| IRON SALTS, SOLUBLE, as Fe | mg/m3 | 1 | 2 | ||
| ISOBUTYL ACETATE | 110-19-0 | ppm | 150 | ||
| ISOBUTYL NITRITE, INHALABLE FRACTION & VAPOUR | 542-56-3 | ppm | 1 | ||
| ISOPHORONE DIISOCYANATE | 4098-71-9 | ppm | 0.005 | 0.01 | |
| ISOPROPYL ACETATE | 108-21-4 | ppm | 100 | 200 | |
| ISOPROPYL GLYCIDYL ETHER (IGE) | 4016-14-2 | ppm | 50 | ||
| LEAD CHROMATE, as Cr(VI), INHALABLE | 7758-97-6 | No BC exposure limit | |||
| LEAD CHROMATE, as Cr, TOTAL | 7758-97-6 | mg/m3 | 0.012 | ||
| LEAD CHROMATE, as Pb, TOTAL | 7758-97-6 | mg/m3 | 0.05 | ||
| LITHIUM HYDRIDE | 7580-67-8 | mg/m3 | 0.025 | ||
| LITHIUM HYDROXIDE | 1310-65-2 | mg/m3 | 1 | ||
| MAGNESIUM OXIDE, RESPIRABLE DUST AND FUME, as Mg | 1309-48-4 | mg/m3 | 3 | 10 | |
| MALEIC ANHYDRIDE | 108-31-6 | ppm | 0.1 | ||
| MANGANESE, ELEMENTAL AND INORGANIC COMPOUNDS, as Mn, TOTAL | 7439-96-5 | mg/m3 | 0.2 | ||
| MANGANESE, ELEMENTAL AND INORGANIC COMPOUNDS, as Mn, INHALABLE | 7439-96-5 | No BC exposure limit | |||
| MANGANESE, ELEMENTAL AND INORGANIC COMPOUNDS, as Mn, RESPIRABLE | 7439-96-5 | mg/m3 | 0.02 | ||
| MERCURY, ARYL COMPOUNDS | 7439-97-6 | mg/m3 | 0.05 | 0.1 | |
| MESITYL OXIDE | 141-79-7 | ppm | 10 | 25 | |
| METHOMYL | 16752-77-5 | mg/m3 | 2.5 | ||
| METHOXYFLURANE | 76-38-0 | ppm | 2 | ||
| 2-METHOXY-1-PROPANOL | 1589-47-5 | ppm | 20 | 40 | |
| 1-METHOXYPROPYL-2-ACETATE | 108-65-6 | ppm | 50 | 75 | |
| 2-METHOXYPROPYL-1-ACETATE | 70657-70-4 | ppm | 20 | 40 | |
| METHYLENE BISPHENYL ISOCYANATE | 101-68-8 | ppm | 0.005 | 0.01 | |
| METHYLENE bis (4-CYCLOHEXYL-ISOCYANATE) | 5124-30-1 | ppm | 0.005 | 0.01 | |
| 4,4'-METHYLENE BIS(2-CHLOROANILINE) | 101-14-4 | ppm | 0.01 | ||
| 4,4'-METHYLENEDIANILINE | 101-77-9 | ppm | 0.01 | ||
| METHYL 2-CYANOACRYLATE | 137-05-3 | ppm | 0.2 | ||
| METHYL ETHYL KETONE (MEK) | 78-93-3 | ppm | 50 | 100 | |
| METHYL PARATHION | 298-00-0 | mg/m3 | 0.2 | ||
| METHYL PROPYL KETONE (2-PENTANONE) | 107-87-9 | ppm | 150 | 250 | |
| METHYLTETRAHYDROPHTHALIC ANHYDRIDE ISOMERS | 3425-89-6; 5333-84-6; 11070-44-3; 19438-63-2; 19438-64-3; 26590-20-5; 42498-58-8 | No BC exposure limit | |||
| METHYL VINYL KETONE | 78-94-4 | ppm | 0.2 | ||
| MONOMETHYLFORMAMIDE | 123-39-7 | No BC exposure limit | |||
| 1,5-NAPHTHYLENE DIISOCYANATE | 3173-72-6 | ppm | 0.005 | 0.01 | |
| NATURAL RUBBER LATEX, AS TOTAL PROTEINS, INHALABLE | 9006-04-6 | mg/m3 | 0.001 | ||
| NICKEL, ELEMENTAL, SOLUBLE INORGANIC COMPOUNDS (NOS) | 7440-02-0 | mg/m3 | 0.05 | ||
| NICKEL, INSOLUBLE INORGANIC COMPOUNDS (NOS) | 7440-02-0 | mg/m3 | 0.05 | ||
| NICKEL CARBONYL, as Ni | 13463-39-3 | ppm | 0.001 | 0.05 | |
| NITRAPYRIN | 1929-82-4 | mg/m3 | 10 | 20 | |
| NITRAPYRIN, INHALABLE FRACTION & VAPOUR | 1929-82-4 | No BC exposure limit | |||
| NITROGEN DIOXIDE | 10102-44-0 | ppm | 1 | ||
| 5-NITRO-O-TOLUIDINE | 99-55-8 | mg/m3 | 1 | ||
| 5-NITRO-O-TOLUIDINE, INHALABLE FRACTION & VAPOUR | 99-55-8 | No BC exposure limit | |||
| 2-NITROPROPANE | 79-46-9 | ppm | 5 | ||
| NITROUS OXIDE | 10024-97-2 | ppm | 25 | ||
| OIL MIST, MINERAL, MILDLY REFINED | mg/m3 | 0.2 | |||
| OIL MIST, MINERAL, SEVERELY REFINED | mg/m3 | 1 | |||
| PARAQUAT, as the cation, INHALABLE | 4685-14-7 | No BC exposure limit | |||
| PARAQUAT, as the cation, RESPIRABLE | 4685-14-7 | mg/m3 | 0.1 | ||
| PARAQUAT, as the cation, TOTAL | 4685-14-7 | mg/m3 | 0.5 | ||
| PENTACHLORONAPHTHALENE | 1321-64-8 | mg/m3 | 0.5 | ||
| PENTACHLORONAPHTHALENE, INHALABLE FRACTION & VAPOUR | 1321-64-8 | No BC exposure limit | |||
| PENTACHLOROPHENOL | 87-86-5 | mg/m3 | 0.5 | ||
| 2,4-PENTANEDIONE | 123-54-6 | No BC exposure limit | |||
| PERACETIC ACID | 79-21-0 | No BC exposure limit | |||
| PHENYL ISOCYANATE | 103-71-9 | ppm | 0.005 | 0.01 | |
| PHENYL MERCAPTAN | 108-98-5 | ppm | 0.1 | ||
| PHOSPHINE | 7803-51-2 | ppm | 0.3 | 1 | |
| o-PHTHALALDEHYDE | 643-79-8 | No BC exposure limit | |||
| PHTHALIC ANHYDRIDE | 85-44-9 | ppm | 1 | ||
| o-PHTHALODINITRILE | 91-15-6 | No BC exposure limit | |||
| PIPERAZINE AND ITS SALTS, as PIPERAZINE | 110-85-0 | mg/m3 | 0.3 | 1 | |
| PIPERIDINE | 110-89-4 | ppm | 1 | ||
| PLASTER OF PARIS, TOTAL | 26499-65-0 | mg/m3 | 10 | 20 | |
| PROPOXUR | 114-26-1 | mg/m3 | 0.5 | ||
| n-PROPYL ACETATE | 109-60-4 | ppm | 200 | 250 | |
| PROPYL ACETATE ISOMERS (including ISOPROPYL ACETATE and n-PROPYL ACETATE) | 108-21-4, 109-60-4 | (See individual exposure limits for ISOPROPYL ACETATE and n-PROPYL ACETATE) | |||
| PROPYLENE GLYCOL ETHYL ETHER | 1569-02-4 | No BC exposure limit | |||
| PROPYLENEIMINE | 75-55-8 | ppm | 2 | ||
| RHODIUM, METAL AND INSOLUBLE COMPOUNDS, as Rh | 7440-16-6 | mg/m3 | 0.1 | 0.3 | |
| RHODIUM, SOLUBLE COMPOUNDS, as Rh | 7440-16-6 | mg/m3 | 0.001 | 0.003 | |
| SELENIUM AND COMPOUNDS, as Se | 7782-49-2 | mg/m3 | 0.1 | ||
| SILICA, AMORPHOUS: | |||||
DIATOMACEOUS EARTH, UNCALCINED, TOTAL |
61790-53-2 | mg/m3 | 4 | ||
DIATOMACEOUS EARTH, UNCALCINED, RESPIRABLE |
61790-53-2 | mg/m3 | 1.5 | ||
PRECIPITATED SILICA and SILICA GEL, TOTAL |
112926-00-8 | mg/m3 | 4 | ||
PRECIPITATED SILICA and SILICA GEL, RESPIRABLE |
112926-00-8 | mg/m3 | 1.5 | ||
SILICA FUME, TOTAL |
69012-64-2 | mg/m3 | 4 | ||
| SILICA FUME, RESPIRABLE | 69012-64-2 | mg/m3 | 1.5 | ||
| SILICON TETRAHYDRIDE (SILANE) | 7803-62-5 | ppm | 0.5 | 1 | |
| SILVER AND COMPOUNDS, as Ag | 7440-22-4 | mg/m3 | 0.01 | 0.03 | |
| SIMAZINE | 122-34-9 | No BC exposure limit | |||
| STEARATES | 57-11-4; 557-04-0; 557-05-1; 822-16-2 |
mg/m3 | 10 (J) | ||
| STODDARD SOLVENT (MINERAL SPIRITS) | 8052-41-3 | mg/m3 | 290 | 580 | |
| STRONTIUM CHROMATE, as Cr, TOTAL | 7789-06-2 | mg/m3 | 0.0005 | ||
| SULFOMETURON METHYL | 74222-97-2 | mg/m3 | 5 | ||
| SULFOMETURON METHYL, INHALABLE FRACTION & VAPOUR | 74222-97-2 | No BC exposure limit | |||
| SULFOXAFLOR | 946578-00-3 | No BC exposure limit | |||
| SULFUR DIOXIDE | 7446-09-5 | ppm | 2 | 5 | |
| SULPROFOS | 35400-43-2 | mg/m3 | 1 | ||
| TANTALUM and TANTALUM OXIDE dusts, as Ta | 7440-25-7 | mg/m3 | 5 | ||
| TEMEPHOS, TOTAL | 3383-96-8 | (See individual exposure limits for ABATE (TEMEPHOS), TOTAL) | |||
| 1,1,2,2-TETRABROMOETHANE, INHALABLE FRACTION & VAPOUR | 79-27-6 | ppm | 0.1 | ||
| 1,1,1,2-TETRACHLORO-2,2-DIFLUOROETHANE | 76-11-9 | ppm | 500 | ||
| 1,1,2,2-TETRACHLORO-1,2-DIFLUOROETHANE | 76-12-0 | ppm | 200 | ||
| TETRAETHYL LEAD, as Pb | 78-00-2 | mg/m3 | 0.075 | ||
| TETRAMETHYL LEAD, as Pb | 75-74-1 | mg/m3 | 0.075 | ||
| TETRAMETHYL SUCCINONITRILE | 3333-52-6 | ppm | 0.5 | ||
| THIACLOPRID | 111988-49-9 | No BC exposure limit | |||
| THIOGLYCOLIC ACID | 68-11-1 | ppm | 1 | ||
| THIOGLYCOLIC ACID and salts | 68-11-1 | No BC exposure limit | |||
| THIONYL CHLORIDE | 7719-09-7 | ppm | 1 | ||
| THIRAM | 137-26-8 | mg/m3 | 1 | ||
| TIN and INORGANIC COMPOUNDS, excluding TIN HYDRIDE and INDIUM TIN OXIDE, as Sn | 7440-31-5; 18282-10-5; 21651-19-4 | (See individual exposure limits for TIN and INORGANIC COMPOUNDS, excluding TIN HYDRIDE, as Sn, METAL; and for TIN and INORGANIC COMPOUNDS, excluding TIN HYDRIDE, as Sn, OXIDE and INORGANIC COMPOUNDS) | |||
| TIN and INORGANIC COMPOUNDS, excluding TIN HYDRIDE, as Sn, METAL | 7440-31-5 | mg/m3 | 2 | ||
| TIN and INORGANIC COMPOUNDS, excluding TIN HYDRIDE, as Sn, OXIDE and INORGANIC COMPOUNDS | 7440-31-5 | mg/m3 | 2 | ||
| 2,4-TOLUENE DIISOCYANATE (TDI) | 584-84-9 | ppm | 0.005 | 0.01 | |
| 2,6-TOLUENE DIISOCYANATE (TDI) | 91-08-7 | ppm | 0.005 | 0.01 | |
| 2,4- and 2,6-TOLUENE DIISOCYANATE AS A MIXTURE | 584-84-9 91-08-7 |
No BC exposure limit (see section 5.51, OHSR) |
|||
| TRIBUTYL PHOSPHATE | 126-73-8 | ppm | 0.2 | ||
| 1,2,3-TRICHLOROPROPANE | 96-18-4 | ppm | 10 | ||
| 1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE | 76-13-1 | ppm | 500 | 1250 | |
| TRIMELLITIC ANHYDRIDE | 552-30-7 | mg/m3 | 0.04 | ||
| TRIMETHYL HEXAMETHYLENE DIISOCYANATE | 28679-16-5 | ppm | 0.005 | 0.01 | |
| 2,4,6-TRINITROTOLUENE (TNT) | 118-96-7 | mg/m3 | 0.1 | ||
| 2,4,6-TRINITROTOLUENE (TNT), INHALABLE FRACTION & VAPOUR | 118-96-7 | No BC exposure limit | |||
| TRIORTHOCRESYL PHOSPHATE | 78-30-8 | mg/m3 | 0.1 | ||
| TRI-n-BUTYLTIN COMPOUNDS | 688-73-3 | mg/m3 | 0.05 | ||
| TUNGSTEN as W: | |||||
Metal and insoluble compounds |
7440-33-7 | mg/m3 | 5 | 10 | |
Soluble compounds |
7440-33-7 | mg/m3 | 1 | 3 | |
| URANIUM COMPOUNDS, NATURAL, SOLUBLE, as U | 7440-61-1 | mg/m3 | 0.05 | ||
| VEGETABLE OIL MIST, RESPIRABLE FRACTION, EXCEPT CASTOR, CASHEW NUT, OR SIMILAR IRRITATING OILS | 8008-89-7 | mg/m3 | 3 | ||
| VINYLIDENE CHLORIDE | 75-35-4 | ppm | 1 | ||
| VINYL TOLUENE, ALL ISOMERS | 25013-15-4 | ppm | 25 | 75 | |
| WARFARIN | 81-81-2 | mg/m3 | 0.1 | ||
| WOOD DUST: | |||||
ALLERGENIC |
mg/m3 | 1 | |||
NON-ALLERGENIC, HARDWOOD |
mg/m3 | 1 | |||
NON-ALLERGENIC, SOFTWOOD |
mg/m3 | 2.5 | |||
m-XYLENE ALPHA, ALPHA'-DIAMINE |
1477-55-0 | mg/m3 | 0.1 | ||
| ZINC CHROMATES, as Cr, TOTAL | 11103-86-9, 13530-65-9, 37300-23-5 | mg/m3 | 0.01 | ||
| ZINC STEARATE, TOTAL | 557-05-1 | mg/m3 | 10 | 20 | |
(E) = the value is for particulate matter containing no asbestos and less than 1% crystalline silica
(N) = the 8-hour TWA listed in the Table is for the total dust. The substance also has an 8-hour TWA of 3 mg/m3 for the respirable fraction
(J) = does not include stearates of toxic metals
2. Dusts
The Board categorizes particulates that are insoluble or poorly soluble in water and do not cause toxic effects other than by inflammation or the mechanism of "lung overload", as "nuisance dusts".
A "nuisance dust" will have an exposure limit or TLV of 10 mg/m3 for total particulate. It is recognized that the respirable fraction of "nuisance dusts" may also be measured. The equivalent exposure limit for respirable particulate is 3 mg/m3. Respirable particulate refers to the fraction of inhaled dust that is capable of passing through the upper respiratory tract to the gas exchange region of the lung. Total particulate refers to a wide range of particle sizes capable of being deposited in the various regions of the respiratory tract.
| EFFECTIVE DATE: | January 6, 2019 |
| AUTHORITY: | s. 5.48, Occupational Health and Safety Regulation |
| CROSS REFERENCES: | |
| HISTORY: |
Effective January 6, 2020, changes were made to remove the following substances from the Table of Exposure Limits for Excluded Substances in accordance with the exposure limit review and adoption procedure:
CYANOACRYLATES, ETHYL and METHYL DIMETHYLACETAMIDE DIMETHYLFORMAMIDE ETHYL CYANOACRYLATE FLUDRIOXONIL ISOPROPYL ACETATE LEAD CHROMATE, as Cr(VI), INHALABLE LEAD CHROMATE, as Cr, TOTAL LEAD CHROMATE, as Pb, TOTAL METHYL 2-CYANOACRYLATE PARAQUAT, as the cation PHOSPHINE n-PROPYL ACETATE PROPYL ACETATE ISOMERS STRONTIUM CHORMATE, as Cr, TOTAL THIOGLYCOLIC ACID and salts ZINC CHROMATES, as Cr, TOTAL Effective July 3, 2018, housekeeping changes were made to remove the following six substances from the Table of Exposure Limits for Excluded Substances in accordance with the EL review and adoption procedure: ACETYLENE ARGON HELIUM HYDROGEN NEON NITROGEN Effective July 3, 2018, the following editorial changes were made to the Table of Exposure Limits for Excluded Substances to improve readability and clarity:
Effective June 1, 2018, housekeeping changes were made to add the following substances to the Table of Exposure Limits for Excluded Substances in accordance with the EL review and adoption procedure: GLYCERIN MIST, TOTAL AEROSOL MANGANESE, ELEMENTAL AND INORGANIC COMPOUNDS, as Mn, INHALABLE FRACTION MANGANESE, ELEMENTAL AND INORGANIC COMPOUNDS, as Mn, RESPIRABLE FRACTION NICKEL CARBONYL, as Ni Effective June 1, 2018, housekeeping changes were made to remove sixteen substances from the Table of Exposure Limits for Excluded Substances in accordance with the EL review and adoption procedure: ACETONE ALIPHATIC HYDROCARBON GASES, ALKANES [C1 - C4] BARIUM SULFATE 1-BROMOPROPANE BUTANE, ISOMERS:
1-METHOXY-2-PROPANOL METHYL FORMATE METHYL ISOAMYL KETONE METHYL ISOCYANATE NAPTHALENE OXALIC ACID, ANHYDROUS OXALIC ACID, DIHYDRATE PENTANE, ALL ISOMERS TRICHLOROACETIC ACID TRIETHYLAMINE The following substances / chemical names were corrected:
Effective June 1, 2017, housekeeping changes were made to add the following substances to the Table of Exposure Limits for Excluded Substances in accordance with the EL review and adoption procedure: ACETAMIDE ISOBUTANE CADUSAFOS CAPTAFOL β-CHLOROPRENE ETHYLENE GLYCOL (AEROSOL) FOLPET FURFURAL HEXYLENE GLYCOL PHTHALIC ANHYDRIDE STEARATES TUNGSTEN as W, metal and insoluble compounds; soluble compounds Effective July 15, 2016, housekeeping changes were made to add the following substances to the Table of Exposure Limits for Excluded Substances in accordance with the EL review and adoption procedure: BORON TRIBROMIDE BORON TRICHLORIDE BORON TRIFLUORIDE SEC-BUTYL ACETATE TERT-BUTYL ACETATE CALCIUM SILICATE, naturally occurring as WOLLASTONITE CALCIUM SILICATE, synthetic nonfibrous CYANOGEN HARD METALS, containing COBALT and TUNGSTEN CARBIDE as Co ISOBUTYL ACETATE PROPOXUR SIMAZINE TOLUENE DIISOCYANATE, 2,4- and 2,6- as a mixture TRIORTHOCRESYL PHOSPHATE WARFARIN Effective May 1, 2015, changes were made to add the following substances to the Table of Exposure Limits for Excluded Substances: ACETYLENE CYANOGEN BROMIDE (NEW TLV) LITHIUM HYDRIDE METHYL FORMATE OXALIC ACID, ANHYDROUS and DIHYDRATE 1,2,3-TRICHLOROPROPANE TRIETHYLAMINE Effective February 1, 2015, changes were made to remove eight substances from the Table of Exposure Limits for Excluded Substances: BERYLLIUM AND COMPOUNDS CARBONYL SULFIDE DIACETYL ETHYL FORMATE ALPHA-METHYL STYRENE NONANE PORTLAND CEMENT VANADIUM PENTOXIDE On April 7, 2014 changes were made to correct the exposure limit for Ethylidene norbornene. Effective April 1, 2014, changes were made to add 17 substances to the Table of Exposure Limits for Excluded Substances: ARGONATRAZINE BARIUM SULFATE 1-BROMOPROPANE ETHYLIDENE NORBORNENE ETHYL ISOCYANATE HELIUM HYDROGEN METHOMYL METYHL ISOCYANATE NAPTHALENE NEON NITROGEN PENTACHLOROPHENOL PENTANE, all isomers PERACETIC ACID TRICHLOROACETIC ACID Effective May 1, 2013, changes were made to add eight substances to the Table of Exposure Limits for Excluded Substances: ALIPHATIC HYDROCARBON GASES, ALKANES [C1-C4] Effective April 10, 2012, changes were made to add six substances to the Table of Exposure Limits for Excluded Substances: ALLY BROMIDECARBONYL SULFIDE DIACETYL ETHYL FORMATE NONANE o-PHTHALODINITRILE CAS No for piperazine and its salts was corrected from 142-64-3 to 110-85-0. Housekeeping change effective October 14, 2011 to correct the reference to section 5.57 of the regulation. This is not a substantive change. Effective September 15, 2011, changes were made to remove seven substances from the Table of Exposure Limits for Excluded Substances: ACETIC ANHYDRIDECARBON BLACK ETHYL BENZENE METHYL ISOPROPYL KETONE SOAPSTONE SOAPSTONE, RESPIRABLE 4,4' THIOBIS (6-tert-butyl-m-CRESOL) Effective June 1, 2011, changes were made to remove three substances from the Table of Exposure Limits for Excluded Substances: COTTON DUST, rawMETHYL ISOBUTYL KETONE THALLIUM AND SOLUBLE COMPOUNDS Housekeeping changes effective June 1, 2011, to replace "exposure level" with "exposure limit" in Item 3 of the Background of this Policy. These changes also add 2,4-Pentanedione to the Table of Exposure Limits for Excluded Substances pursuant to the Exposure Limit review and adoption procedure approved by the Board of Directors at their March 2010 meeting. Housekeeping changes effective April 19, 2011 in accordance with the new Exposure Limit review and adoption procedure approved by the Board of Directors at their March 2010 meeting. The changes add seven substances to the Table of Exposure Limits for Excluded Substances: ACETIC ANHYDRIDECARBON BLACK ETHYL BENZENE MALEIC ANHYDRIDE METHYL ISOPROPYL KETONE SOAPSTONE 4,4' THIOBIS (6-tert-butyl-m-CRESOL) Housekeeping changes effective September 15, 2010 to update regulation reference, delete practice reference, and make formatting changes. The Table of Exposure Limits for Excluded Substances has been amended to include 18 substances for which the Board of Directors has made an exception to the adoption of these substances for which the American Conference of Governmental Industrial Hygienists changed the Threshold Limit Values in 2008 and 2009. The effect of this amendment is that the substances will be re-assigned the ELs that were in effect prior to the revision by ACGIH. The Table of Exposure Limits for Excluded Substances has been amended to delete two substances so the more protective American Conference of Governmental Industrial Hygienists Threshold Limit Values will now apply to these substances. The revisions were made to the Table effective September 1, 2010. The Table of Exposure Limits for Excluded Substances has been amended to include new or revised substances for which the American Conference of Governmental Industrial Hygienists has changed the Threshold Limit Values in 2010. The effect of this amendment was that the existing exposure limits for these substances continue to be in effect. These substances were added to the Table effective April 1, 2010. This item was originally developed to implement the amendments made to the Occupational Health and Safety Regulation, effective October 29, 2003 pertaining to exposure limits. A review of the policy was conducted to ensure that all substances for which an exception was warranted were listed, and there was no duplication with the information provided by the ACGIH. |
| APPLICATION: | Each amendment of this policy applies to incidents occurring on and after the effective date of the amendment. If a decision made before the amendment effective date is within the appeal period, at Review Division, or at WCAT, it remains subject to the policy in effect at the time of the incident. |
Policy Item R5.54-1 RE: Chemical and Biological Substances - Controlling Exposure - Exposure Control Plan
BACKGROUND
1. Explanatory Notes
Section 5.54 sets out the requirement for an exposure control plan in certain circumstances and the necessary elements if an exposure control plan is required. Among those elements is health monitoring under section 5.54(2)(f).
2. The Regulation
Section 5.54:
(1) An exposure control plan must be implemented when
(a) exposure monitoring under section 5.53(3) indicates that a worker is or may be exposed to an air contaminant in excess of 50% of its exposure limit,
(b) measurement is not possible at 50% of the applicable exposure limit, or
(c) otherwise required by this Regulation.
(2) The exposure control plan must incorporate the following elements:
(a) a statement of purpose and responsibilities;
(b) risk identification, assessment and control;
(c) education and training;
(d) written work procedures, when required;
(e) hygiene facilities and decontamination procedures, when required;
(f) health monitoring, when required;
(g) documentation, when required.
(3) The plan must be reviewed at least annually and updated as necessary by the employer, in consultation with the joint committee or the worker health and safety representative, as applicable.
POLICY
At the request of persons outside the Board or Board staff, the Board may arrange for samples to be analyzed as part of a health monitoring program under section 5.54(2)(f). The Board will have the results organized into broad categories of body burden levels and reported to the person who made the request and to Board staff and industry representatives concerned with the particular program.
The actual body burden levels of individuals are confidential and will only be revealed to a worker if the worker inquires, and to anyone else with the worker's written authorization. Questions regarding specific analysis results should be referred to the Board staff concerned with the particular program.
| EFFECTIVE DATE: | April 1, 2001 |
| AUTHORITY: | s. 5.54(2)(f), Occupational Health and Safety Regulation |
| CROSS REFERENCES: | |
| HISTORY: | Housekeeping changes effective September 15, 2010 to delete practice reference and make formatting changes. Replaces Policy No. 13.01(6) of the Prevention Division Policy and Procedure Manual |
| APPLICATION: | This Item results from the 2000/2001 "editorial" consolidation of all prevention policies into the Prevention Manual. The POLICY in this Item merely continues the substantive requirements of Policy No. 13.01(6), as they existed prior to the Effective Date, with any wording changes necessary to reflect legislative and regulatory changes since Policy No. 13.01(6) was issued. |