Regulations last checked for updates: Nov 22, 2024

Title 40 - Protection of Environment last revised: Nov 20, 2024
Appendix Appendix V - Appendix V to Part 266—Risk Specific Doses (10−5)
Constituent CAS No. Unit risk (m 3/μg) RsD (μg/m 3)
Acrylamide79-06-11.3E−037.7E−03
Acrylonitrile107-13-16.8E−051.5E−01
Aldrin309-00-24.9E−032.0E−03
Aniline62-53-37.4E−061.4E + 00
Arsenic7440-38-24.3E−032.3E−03
Benz(a)anthracene56-55-38.9E−041.1E−02
Benzene71-43-28.3E−061.2E + 00
Benzidine92-87-56.7E−021.5E−04
Benzo(a)pyrene50-32-83.3E−033.0E−03
Beryllium7440-41-72.4E−034.2E−03
Bis(2-chloroethyl)ether111-44-43.3E−043.0E−02
Bis(chloromethyl)ether542-88-16.2E−021.6E−04
Bis(2-ethylhexyl)-phthalate117-81-72.4E−074.2E + 01
1,3-Butadiene106-99-02.8E−043.6E−02
Cadmium7440-43-91.8E−035.6E−03
Carbon Tetrachloride56-23-51.5E−056.7E−01
Chlordane57-74-93.7E−042.7E−02
Chloroform67-66-32.3E−054.3E−01
Chloromethane74-87-33.6E−062.8E + 00
Chromium VI7440-47-31.2E−028.3E−04
DDT50-29-39.7E−051.0E−01
Dibenz(a,h)anthracene53-70-31.4E−027.1E−04
1,2-Dibromo-3-chloropropane96-12-86.3E−031.6E−03
1,2-Dibromoethane106-93-42.2E−044.5E−02
1,1-Dichloroethane75-34-32.6E−053.8E−01
1,2-Dichloroethane107-06-22.6E−053.8E−01
1,1-Dichloroethylene75-35-45.0E−052.0E−01
1,3-Dichloropropene542-75-63.5E−012.9E−05
Dieldrin60-57-14.6E−032.2E−03
Diethylstilbestrol56-53-11.4E−017.1E−05
Dimethylnitrosamine62-75-91.4E−027.1E−04
2,4-Dinitrotoluene121-14-28.8E−051.1E−01
1,2-Diphenylhydrazine122-66-72.2E−044.5E−02
1,4-Dioxane123-91-11.4E−067.1E + 00
Epichlorohydrin106-89-81.2E−068.3E + 00
Ethylene Oxide75-21-81.0E−041.0E−01
Ethylene Dibromide106-93-42.2E−044.5E−02
Formaldehyde50-00-01.3E−057.7E−01
Heptachlor76-44-81.3E−037.7E−03
Heptachlor Epoxide1024-57-32.6E−033.8E−03
Hexachlorobenzene118-74-14.9E−042.0E−02
Hexachlorobutadiene87-68-32.0E−055.0E−01
Alpha-hexachloro-cyclohexane319-84-61.8E−035.6E−03
Beta-hexachloro-cyclohexane319-85-75.3E−041.9E−02
Gamma-hexachloro-cyclohexane58-89-93.8E−042.6E−02
Hexachlorocyclo-hexane, Technical5.1E−042.0E−02
Hexachlorodibenzo-p-dioxin(1,2 Mixture)1.3E + 07.7E−06
Hexachloroethane67-72-14.0E−062.5E + 00
Hydrazine302-01-22.9E−033.4E−03
Hydrazine Sulfate302-01-22.9E−033.4E−03
3-Methylcholanthrene56-49-52.7E−033.7E−03
Methyl Hydrazine60-34-43.1E−043.2E−02
Methylene Chloride75-09-24.1E−062.4E + 00
4,4′-Methylene-bis-2-chloroaniline101-14-44.7E−052.1E−01
Nickel7440-02-02.4E−044.2E−02
Nickel Refinery Dust7440-02-02.4E−044.2E−02
Nickel Subsulfide12035-72-24.8E−042.1E−02
2-Nitropropane79-46-92.7E−023.7E−04
N-Nitroso-n-butylamine924-16-31.6E−036.3E−03
N-Nitroso-n-methylurea684-93-58.6E−021.2E−04
N-Nitrosodiethylamine55-18-54.3E−022.3E−04
N-Nitrosopyrrolidine930-55-26.1E−041.6E−02
Pentachloronitrobenzene82-68-87.3E−051.4E−01
PCBs1336-36-31.2E−038.3E−03
Pronamide23950-58-54.6E−062.2E + 00
Reserpine50-55-53.0E−033.3E−03
2,3,7,8-Tetrachloro-dibenzo-p-dioxin1746-01-64.5E + 012.2E−07
1,1,2,2-Tetrachloroethane79-34-55.8E−051.7E−01
Tetrachloroethylene127-18-44.8E−072.1E + 01
Thiourea62-56-65.5E−041.8E−02
1,1,2-Trichloroethane79-00-51.6E−056.3E−01
Trichloroethylene79-01-61.3E−067.7E + 00
2,4,6-Trichlorophenol88-06-25.7E−061.8E + 00
Toxaphene8001-35-23.2E−043.1E−02
Vinyl Chloride75-01-47.1E−061.4E + 00
[56 FR 7232, Feb. 21, 1991, as amended at 71 FR 40277, July 14, 2006]
source: 50 FR 666, Jan. 4, 1985, unless otherwise noted.