California Code of Regulations
Title 22 - Social Security
Division 4.5 - Environmental Health Standards for the Management of Hazardous Waste
Chapter 16 - Recyclable Materials (Recyclable Hazardous Wastes)
Appendix IV - Reference Air Concentrations*
Universal Citation: 22 CA Code of Regs IV
Current through Register 2024 Notice Reg. No. 12, March 22, 2024
Constituent | CAS No. | RAC (ug/m3) |
Acetaldehyde | 75-07-0 | 10 |
Acetonitrile | 75-05-8 | 10 |
Acetophenone | 98-86-2 | 100 |
Acrolein | 107-02-8 | 20 |
Aldicarb | 116-06-3 | 1 |
Aluminum Phosphide | 20859-73-8 | 0.3 |
Allyl Alcohol | 107-18-6 | 5 |
Antimony | 7440-36-0 | 0.3 |
Barium | 7440-39-3 | 50 |
Barium Cyanide | 542-62-1 | 50 |
Bromomethane | 74-83-9 | 0.8 |
Calcium Cyanide | 592-01-8 | 30 |
Carbon Disulfide | 75-15-0 | 200 |
Chloral | 75-87-6 | 2 |
Chlorine (free) | 0.4 | |
2-Chloro-1,3-butadiene | 126-99-8 | 3 |
Chromium III | 16065-83-1 | 1000 |
Copper Cyanide | 544-92-3 | 5 |
Cresols | 1319-77-3 | 50 |
Cumene | 98-82-8 | 1 |
Cyanide (free) | 57-12-15 | 20 |
Cyanogen | 460-19-5 | 30 |
Cyanogen Bromide | 506-68-3 | 80 |
Di-n-butyl Phthalate | 84-74-2 | 100 |
o-Dichlorobenzene | 95-50-1 | 10 |
p-Dichlorobenzene | 106-46-7 | 10 |
Dichlorodifluoromethane | 75-71-8 | 200 |
2,4-Dichlorophenol | 120-83-2 | 3 |
Diethyl Phthalate | 84-66-2 | 800 |
Dimethoate | 60-51-5 | 0.8 |
2,4-Dinitrophenol | 51-28-5 | 2 |
Dinoseb | 88-85-7 | 0.9 |
Diphenylamine | 122-39-4 | 20 |
Endosulfan | 115-29-1 | 0.05 |
Endrin | 72-20-8 | 0.3 |
Fluorine | 7782-41-4 | 50 |
Formic Acid | 64-18-6 | 2000 |
Glycidyaldehyde | 765-34-4 | 0.3 |
Hexachlorocyclopentadiene | 77-47-4 | 5 |
Hexachlorophene | 70-30-4 | 0.3 |
Hydrocyanic Acid | 74-90-3 | 20 |
Hydrogen Chloride | 7647-01-1 | 7 |
Hydrogen Sulfide | 7783-06-4 | 3 |
Isobutyl Alcohol | 78-83-1 | 300 |
Lead | 7439-92-1 | 0.09 |
Maleic Anyhdride | 108-31-6 | 100 |
Mercury | 7439-97-6 | 0.3 |
Methacrylonitrile | 126-98-7 | 0.1 |
Methomyl | 16752-77-5 | 20 |
Methoxychlor | 72-43-5 | 50 |
Methyl Chlorocarbonate | 79-22-1 | 1000 |
Methyl Ethyl Ketone | 78-93-3 | 80 |
Methyl Parathion | 298-00-0 | 0.3 |
Nickel Cyanide | 557-19-7 | 20 |
Nitric Oxide | 10102-43-9 | 100 |
Nitrobenzene | 98-95-3 | 0.8 |
Pentachlorobenzene | 608-93-5 | 0.8 |
Pentachlorophenol | 87-86-5 | 30 |
Phenol | 108-95-2 | 30 |
M-Phenylenediamine | 108-45-2 | 5 |
Phenylmercuric Acetate | 62-38-4 | 0.075 |
Phosphine | 7803-51-2 | 0.3 |
Phthalic Anhydride | 85-44-9 | 2000 |
Potassium Cyanide | 151-50-8 | 50 |
Potassium Silver Cyanide | 506-61-6 | 200 |
Pyridine | 110-86-1 | 1 |
Selenious Acid | 7783-60-8 | 3 |
Selenourea | 630-10-4 | 5 |
Silver | 7440-22-4 | 3 |
Silver Cyanide | 506-64-9 | 100 |
Sodium Cyanide | 143-33-9 | 30 |
Strychnine | 57-24-9 | 0.3 |
1,2,4,5-Tetrachlorobenzene | 95-94-3 | 0.3 |
2,3,4,6-Tetrachlorophenol | 58-90-2 | 30 |
Tetraethyl Lead | 78-00-2 | 0.0001 |
Tetrahydrofuran | 109-99-9 | 10 |
Thallic Oxide | 1314-32-5 | 0.3 |
Thallium | 7440-28-0 | 0.5 |
Thallium (I) Acetate | 563-68-8 | 0.5 |
Thallium (I) Carbonate | 6533-73-9 | 0.3 |
Thallium (I) Chloride | 7791-12-0 | 0.3 |
Thallium (I) Nitrate | 10102-45-1 | 0.5 |
Thallium Selenite | 12039-52-0 | 0.5 |
Thallium (I) Sulfate | 7446-18-6 | 0.075 |
Thiram | 137-26-8 | 5 |
Toluene | 108-88-3 | 300 |
1,2,4-Trichlorobenzene | 120-82-1 | 20 |
Trichloromonofluoromethane | 75-69-4 | 300 |
2,4,5-Trichlorophenol | 95-95-4 | 100 |
Vanadium Pentoxide | 1314-62-1 | 20 |
Warfarin | 81-81-2 | 0.3 |
Xylenes | 1330-20-7 | 80 |
Zinc Cyanide | 557-21-1 | 50 |
Zinc Phosphide | 1314-84-7 | 0.3 |
FOOTNOTE: *The RAC for other appendix VIII chapter 11 constituents not listed herein or in appendix V of this chapter is 0.1 ug/m3.
1. New appendix filed 7-1-96; operative 7-31-96 (Register 96, No. 27).
Note: Authority cited: Sections 25150, 25159, 25159.5, 25245, 58004 and 58012, Health and Safety Code. Reference: Sections 25159 and 25159.5, Health and Safety Code; and 40 CFR part 266 , Appendix IV.
Disclaimer: These regulations may not be the most recent version. California may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
This site is protected by reCAPTCHA and the Google
Privacy Policy and
Terms of Service apply.