Wash. Admin. Code § 173-401-531
Current through Register Vol. 24-17, September 1, 2024
General. The following tables provide thresholds for hazardous air pollutants:
| CAS Number | Chemical Name | Threshold Levels (tons/year) |
| 189-55-9 | 1, 2, 7, 8-dibenzopyrene | 0.005 |
| 107-06-2 | 1, 2-dichloroethane | 0.4 |
| 78-87-5 | 1, 2-dichloropropane | 0.5 |
| 540-73-8 | 1, 2-dimethylhydrazine | 0.004 |
| 122-66-7 | 1, 2-diphenylhydrazine | 0.045 |
| 106-99-0 | 1, 3-butadiene | 0.035 |
| 1120-71-4 | 1, 3-propane sultone | 0.003 |
| 106-46-7 | 1, 4-dichlorobenzene (p) | 0.5 |
| 123-91-1 | 1, 4-dioxane (1, 4-diethyleneoxide) | 0.5 |
| 94-75-7 | 2, 4-d salts & esters | 0.5 |
| 95-80-7 | 2, 4-toluene diamine | 0.01 |
| 584-84-9 | 2, 4-toluene diisocyanate | 0.05 |
| 53-96-3 | 2-acetylaminofluorene | 0.0025 |
| 119-90-4 | 3, 3'-dimethoxybenzidine | 0.5 |
| 119-93-7 | 3, 3-dimethyl benzidine | 0.004 |
| 101-14-4 | 4, 4'-methylenebis (2-chloroaniline) | 0.5 |
| 75-07-0 | acetaldehyde | 0.5 |
| 107-13-1 | acrylonitrile | 0.15 |
| 62-53-3 | aniline | 0.5 |
| C7440-38-2 | arsenic and inorganic arsenic compounds | 0.002 |
| 1332-21-4 | asbestos (fibers/ml) | 0.00004 |
| 71-43-2 | benzene | 0.5 |
| 92-87-5 | benzidine (and its salts) | 0.00015 |
| 56-55-3 | benzo(a)anthracene | 0.005 |
| 50-32-8 | benzo(a)pyrene | 0.005 |
| 205-99-2 | benzo(b)fluoranthene | 0.005 |
| 7440-41-7 | beryllium and compounds (except salts) | 0.004 |
| 117-81-7 | bis (2-ethylhexyl) phthalate | 0.5 |
| 542-88-1 | bis (chloromethyl) ether | 0.00015 |
| 75-25-2 | bromoform | 0.5 |
| 7440-43-9 | cadmium and compounds | 0.005 |
| 56-23-5 | carbon tetrachloride | 0.5 |
| 57-74-9 | chlordane | 0.005 |
| 510-15-6 | chlorobenzilate | 0.2 |
| 67-66-3 | chloroform | 0.45 |
| 107-30-2 | chloromethyl methyl ether | 0.1 |
| 126-99-8 | chloroprene | 0.5 |
| C7440-47-3 | chromium, hexavalent metal | 0.001 |
| 218-01-9 | chrysene | 0.005 |
| coke oven emissions | 0.015 | |
| 3547-04-4 | DDE | 0.005 |
| 53-70-3 | dibenz(a, h)anthracene | 0.005 |
| 132-64-9 | dibenzofuran | 0.5 |
| 111-44-4 | dichloroethyl ether | 0.03 |
| 75-09-2 | dichloromethane | 0.5 |
| 77-78-1 | dimethyl sulfate | 0.1 |
| dioxins & furans (tcdd equivalent) | 3e-07 | |
| 106-89-8 | epichlorohydrin | 0.5 |
| 107-06-2 | ethylene dichloride | 0.4 |
| 106-93-4 | ethylene dibromide (dibromethane) | 0.05 |
| 75-21-8 | ethylene oxide | 0.1 |
| 96-45-7 | ethylene thiourea | 0.3 |
| 76-44-8 | heptachlor | 0.01 |
| 118-74-1 | hexachlorobenzene | 0.005 |
| 58-89-9 | hexachlorocyclohexane, gamma | 0.005 |
| 302-01-2 | hydrazine | 0.002 |
| 193-39-5 | indeno (1, 2, 3-cd) pyrene | 0.005 |
| lead & compounds (except those listed) | 0.005 | |
| 58-89-9 | lindane | 0.005 |
| 75-09-2 | methylene chloride | 0.5 |
| 62-75-9 | n-nitrosodimethylamine | 0.0005 |
| C7440-02-0 | nickel and compounds (except those listed) | 0.02 |
| 13463-39-3 | nickel carbonyl | 0.1 |
| 95-53-4 | o-toluidine | 0.5 |
| 87-86-5 | pentachlorophenol | 0.35 |
| 127-18-4 | perchloroethylene | 0.5 |
| 1336-36-3 | polychlorinated biphenyls | 0.0045 |
| 75-56-9 | propylene oxide | 0.5 |
| 8001-35-2 | toxaphene | 0.005 |
| 79-01-6 | trichloroethylene | 0.5 |
| 75-01-4 | vinyl chloride | 0.1 |
| 79-34-5 | 1, 1, 2, 2-tetrachloroethane | 0.15 |
| 79-00-5 | 1, 1, 2-trichloroethane | 0.5 |
| 57-14-7 | 1, 1-dimethyl hydrazine | 0.004 |
| 96-12-8 | 1, 2-dibromo-3-chloropropane | 0.004 |
| 79-06-1 | acrylamide | 0.01 |
| 98-07-7 | benzotrichloride | 0.003 |
| 62-73-7 | dichlorvos | 0.1 |
| 79-44-7 | dimethyl carbamoyl chloride | 0.5 |
| 140-88-5 | ethyl acrylate | 0.5 |
| 51-79-6 | ethyl carbamate | 0.5 |
| 151-56-4 | ethylene imine | 0.5 |
| 87-68-3 | hexachlorobutadiene | 0.5 |
| 67-72-1 | hexachloroethane | 0.5 |
| 60-34-4 | methyl hydrazine | 0.03 |
| 684-93-5 | n-nitroso-n-methylurea | 0.5 |
| 12035-72-2 | nickel refinery dust | 0.08 |
| nickel subsulfide | 0.02 | |
| 82-68-8 | pentachloronitrobenzene | 0.15 |
| 91-22-5 | quinoline | 0.003 |
| 1582-09-8 | trifluralin | 0.5 |
| 593-60-2 | vinyl bromide | 0.5 |
| 75-35-4 | vinylidene chloride | 0.2 |
| 189559 | 1, 2: 7, 8-dibenzopyrene | 0.005 |
| 121142 | 2, 4-dinitrotoluene | 0.01 |
| 88062 | 2, 4, 6-trichlorophenol | 0.5 |
| 91941 | 3, 3-dichlorobenzidene | 0.1 |
| 57596 | 7, 12-dimethylbenz(a)anthracene | 0.005 |
| 50000 | formaldehyde | 0.5 |
| CAS Number | Chemical Name | Threshold Levels (tons/year) |
| 75-34-3 | ethylidene dichloride (1, 1-dichlo-roethane) | 0.5 |
| 75-55-8 | 1, 2 propylenimine (2-methyl aziridine) | 0.003 |
| 120-82-1 | 1, 2, 4-trichlorobenzene | 0.5 |
| 106-88-7 | 1, 2-epoxybutane | 0.5 |
| 542-75-6 | 1, 3-dichloropropene (dichloropropene) | 0.5 |
| 51-28-5 | 2, 4-dinitrophenol | 0.5 |
| 111-76-2 | 2-butoxyethanol | 0.5 |
| 110-80-5 | 2-ethoxyethanol | 0.5 |
| 109-86-4 | 2-methoxyethanol | 0.5 |
| 92-93-3 | 4-nitrobiphenol | 0.5 |
| 100-02-7 | 4-nitrophenol | 0.5 |
| 75-05-8 | acetonitrile | 0.5 |
| 98-86-2 | acetophenone | 0.5 |
| 107-02-8 | acrolein | 0.04 |
| 79-10-7 | acrylic acid | 0.5 |
| 107-05-1 | allyl chloride | 0.5 |
| C7440-36-0 | antimony & compounds as sb | 0.5 |
| 1309-64-4 | antimony trioxide, as sb | 0.5 |
| 7784-42-1 | arsine | 0.1 |
| 100-44-7 | benzyl chloride | 0.1 |
| 92-52-4 | biphenyl | 0.5 |
| 156-62-7 | calcium cyanamide | 0.5 |
| 105-60-2 | caprolactam, dust | 0.5 |
| 105-60-2 | caprolactam, vapor | 0.5 |
| 133-06-2 | captan | 0.5 |
| 63-25-2 | carbaryl | 0.5 |
| 75-15-0 | carbon disulfide | 0.5 |
| 463-58-1 | carbonyl sulfide | 0.5 |
| 120-80-9 | catechol | 0.5 |
| 7782-50-5 | chlorine | 0.1 |
| 79-11-8 | chloroacetic acid | 0.1 |
| 532-27-4 | chloroacetophenone, alpha- | 0.06 |
| 108-90-7 | chlorobenzene | 0.5 |
| C7440-47-3 | chromium (ii) compounds, as cr | 0.5 |
| C7440-47-3 | chromium (iii) compounds, cr | 0.5 |
| 10210-68-1 | cobalt carbonyl, as co | 0.1 |
| 7440-48-4 | cobalt, as co metal dust, fume | 0.1 |
| 1319-77-3 | cresols/cresylic acid, (isomers and mixture) | 0.5 |
| 95-48-7 | o-cresol | 0.5 |
| 108-39-4 | m-cresol | 0.5 |
| 106-44-5 | p-cresol | 0.5 |
| 98-82-8 | cumene | 0.5 |
| 51-12-5 | cyanides, as cn | 0.5 |
| 84-74-2 | dibutyl phthalate | 0.5 |
| 111-42-2 | diethanolamine | 0.5 |
| 60-11-7 | dimethyl aminoazobenzene | 0.5 |
| 121-69-7 | dimethylaniline | 0.5 |
| 68-12-2 | dimethylformamide | 0.5 |
| 131-11-3 | dimethylphthalate | 0.5 |
| 100-41-4 | ethyl benzene | 0.5 |
| 75-00-3 | ethyl chloride | 0.5 |
| 107-21-1 | ethylene glycol | 0.5 |
| 111-76-2 | ethylene glycol monobutyl ether | 0.5 |
| glycol ethers (except for listed ones) | 0.5 | |
| 77-47-4 | hexachlorocyclopentadiene | 0.1 |
| 822-06-0 | hexamethylene, 1, 6-diisocyanate | 0.02 |
| 110-54-3 | hexane (n-hexane) | 0.5 |
| 110-54-3 | hexane, other isomers | 0.5 |
| 7647-01-0 | hydrogen chloride | 0.5 |
| 7664-39-3 | hydrogen fluoride, as f | 0.1 |
| 123-31-9 | hydroquinone | 0.5 |
| 78-59-1 | isophorone | 0.5 |
| 108-31-6 | maleic anhydride | 0.5 |
| C7439-96-5 | manganese dust & compounds (except listed) | 0.5 |
| 748-79-4 | mercuric chloride | 0.01 |
| 10045-94-0 | mercuric nitrate | 0.01 |
| C7439-97-6 | mercury, elemental | 0.01 |
| 72-43-5 | methoxychlor | 0.5 |
| 67-56-1 | methyl alcohol | 0.5 |
| 74-83-9 | methyl bromide | 0.5 |
| 74-87-3 | methyl chloride | 0.5 |
| 71-55-6 | methyl chloroform (1, 1, 1-trichlo-roethane) | 0.5 |
| 78-93-3 | methyl ethyl ketone (mek) | 0.5 |
| 74-88-4 | methyl iodide | 0.06 |
| 108-10-1 | methyl isobutyl ketone | 0.5 |
| 624-83-9 | methyl isocyanate | 0.1 |
| 80-62-6 | methyl methacrylate | 0.5 |
| 1634-04-4 | methyl tert-butyl ether | 0.5 |
| 12108-13-3 | methylcyclopentadienyl manganese tri-carbonyl | 0.1 |
| 101-68-8 | methylene bisphenyl isocyanate | 0.1 |
| 91-20-3 | naphthalene | 0.5 |
| 98-95-3 | nitrobenzene | 0.5 |
| 106-50-3 | p-phenylenediamine | 0.5 |
| 56-38-2 | parathion | 0.1 |
| 108-95-2 | phenol | 0.1 |
| 62-38-4 | phenyl mercuric acetate | 0.01 |
| 75-44-5 | phosgene | 0.1 |
| 7803-51-2 | phosphine | 0.5 |
| 7723-14-0 | phosphorus | 0.1 |
| 85-44-9 | phthalic anhydride | 0.5 |
| 57-57-8 | propiolactone, beta- | 0.1 |
| 123-38-6 | propionaldehyde | 0.5 |
| 114-26-1 | propoxur | 0.5 |
| 106-51-4 | quinone | 0.5 |
| C7782-49-2 | selenium compounds, as se | 0.5 |
| 7783-79-1 | selenium hexafluoride, as se | 0.5 |
| 7488-56-4 | selenium sulfides (mono and di) | 0.5 |
| 100-42-5 | styrene monomer | 0.5 |
| 78-00-2 | tetraethyl lead, as pb | 0.01 |
| 75-74-1 | tetramethyl lead, as pb | 0.01 |
| 7550-45-0 | titanium tetrachloride | 0.1 |
| 108-88-3 | toluene | 0.5 |
| 121-44-8 | triethylamine | 0.5 |
| 108-05-4 | vinyl acetate | 0.5 |
| 593-60-2 | vinyl bromide | 0.5 |
| 1330-20-7 | xylenes (m-,o-,p-isomers) | 0.5 |
| 79469 | 2-nitropropane | 0.5 |
| 540841 | 2, 2, 4-trimethylpentane | 0.5 |
| 95954 | 2, 4, 5-trichlorophenol | 0.5 |
| 92671 | 4-aminobiphenyl | 0.5 |
| 101779 | 4, 4'-methlenedianiline | 0.5 |
| 534521 | 4, 6-dinitro-o-cresol and salts | 0.1 |
| 60355 | acetamide | 0.5 |
| 1345046 | antimony trisulfide | 0.1 |
| 7783702 | antimony pentafluoride | 0.1 |
| 28300745 | antimony potassium tartrate | 0.5 |
| 133904 | chloramben | 0.5 |
| chromium compounds, except hexavalent and trivalent | 0.5 | |
| 10025737 | chromic chloride | 0.1 |
| 334883 | diazomethane | 0.5 |
| 64675 | diethyl sulfate | 0.5 |
| 62207765 | fluomine | 0.1 |
| 680319 | hexamethylphosphoramide | 0.01 |
| 12108133 | methylcyclopentadienyl manganese | 0.1 |
| 101688 | methylene diphenyl diisocyanate | 0.1 |
| 69892 | N-nitrosomorpholine | 0.5 |
| 90040 | o-anisidine | 0.5 |
| polycyclic organic matter | 0.01 | |
| 151508 | potassium cyanide | 0.1 |
| 14339 | sodium cyanide | 0.1 |
| 10102188 | sodium selenite | 0.1 |
| 13410010 | sodium selenate | 0.1 |
| 96093 | styrene oxide | 0.5 |
Wash. Admin. Code § 173-401-531
Statutory Authority: Chapter 70.94 RCW. 94-11-105 (Order 93-30), § 173-401-531, filed 5/17/94, effective 6/17/94.