Cal. Code Regs. tit. 17 § 93000

Current through Register 2024 Notice Reg. No. 50, December 13, 2024

Section 93000 - Substances Identified as Toxic Air Contaminants

Each substance identified in this section has been determined by the State Board to be a toxic air contaminant as defined in Health and Safety Code section 39655. If the State Board has found there to be a threshold exposure level below which no significant adverse health effects are anticipated from exposure to the identified substance, that level is specified as the threshold determination. If the Board has found there to be no threshold exposure level below which no significant adverse health effects are anticipated from exposure to the identified substance, a determination of "no threshold" is specified. If the Board has found that there is not sufficient available scientific evidence to support the identification of a threshold exposure level, the "Threshold" column specifies "None identified."

*Substance*	*Threshold Determination*
Benzene (C₆H₆)	None identified

Ethylene Dibromide (BrCH₂CH₂Br; 1,2-dibromoethane)	None identified

Asbestos [asbestiform varieties of serpentine (chrysotile), riebeckite (crocidolite), cummingtonite-grunerite (amosite), tremolite, actinolite, and anthophyllite]	None identified

Dibenzo-p-dioxins and Dibenzofurans chlorinated in the 2,3,7 and 8 positions and containing 4,5,6 or 7 chlorine atoms	None identified

Cadmium (metallic cadmium and cadmium compounds)	None identified

Carbon Tetrachloride (CCl₄; tetrachloromethane)	None identified

Ethylene Oxide (1,2-epoxyethane)	None identified

Methylene Chloride (CH₂Cl₂; Dichloromethane)	None identified

Trichloroethylene (CCl₂CHCl; Trichloroethene)	None identified

Chloroform (CHCl₃)	None identified

Vinyl chloride (C₂H₃Cl; Chloroethylene)	None identified

Inorganic Arsenic	None identified

Nickel (metallic nickel and inorganic nickel compounds)	None identified

Substance	Threshold Determination

Perchloroethylene (C₂Cl₄; Tetrachloroethylene)	None identified

Formaldehyde (HCHO)	None identified

1,3-Butadiene (C₄H₆)	None identified

Inorganic Lead	None identified

Particulate Emissions from Diesel-Fueled Engines	None identified

Environmental Tobacco Smoke	None identified

Cal. Code Regs. Tit. 17, § 93000

1. New section filed 9-23-85; effective thirtieth day thereafter (Register 85, No. 39). For history of former subchapter 7, see Registers 84, No. 10; 83, No. 2; 81, No. 48; 77, No. 12; and 74, No. 47.
2. Amendment filed 1-14-86; effective thirtieth day thereafter (Register 86, No. 3).
3. Amendment filed 2-10-86; effective thirtieth day thereafter (Register 86, No. 7).
4. Amendment filed 10-9-86; effective thirtieth day thereafter (Register 86, No. 43).
5. Amendment filed 11-25-86; effective thirtieth day thereafter (Register 86, No. 48).
6. Amendment filed 2-23-87; effective thirtieth day thereafter (Register 87, No. 9).
7. Amendment filed 10-8-87; operative 11-7-87 (Register 87, No. 43).
8. Amendment filed 3-15-88; operative 4-14-88 (Register 88, No. 13).
9. Amendment filed 7-22-88; operative 8-21-88 (Register 88, No. 31).
10. Amendment adding Methylene Chloride filed 6-7-90; operative 7-7-90 (Register 90, No. 30).
11. Amendment adding Trichloroethylene filed 2-27-91; operative 3-29-91 (Register 91, No. 13).
12. Amendment adding Vinyl chloride filed 5-10-91; operative 6-9-91 (Register 91, No. 25).
13. Editorial correction, including removal of Inorganic arsenic (Register 91, No. 25).
14. Amendment adding Chloroform filed 5-10-91; operative 6-9-91 (Register 91, No. 25).
15. Amendment adding Inorganic Arsenic filed 6-6-91; operative 7-6-91 (Register 91, No. 26).
16. Change without regulatory effect amending Trichloroethylene and adding Nickel filed 7-14-92 pursuant to section 100, title 1, California Code of Regulations (Register 92, No. 29).
17. Amendment adding Perchloroethylene filed 10-2-92; operative 11-1-92 (Register 92, No. 40).
18. Amendment adding Formaldehyde filed 3-2-93; operative 4-1-93 (Register 93, No. 10).
19. Amendment adding 1,3-Butadiene filed 4-14-93; operative 5-14-93 (Register 93, No. 16).
20. Editorial correction (Register 98, No. 16).
21. Amendment adding inorganic lead filed 4-14-98; operative 5-14-98 (Register 98, No. 16).
22. Amendment adding "Particulate Emissions from Diesel-Fueled Engines" filed 7-21-99; operative 8-20-99 (Register 99, No. 30).
23. Amendment adding "Environmental Tobacco Smoke" filed 1-9-2007; operative 2-8-2007 (Register 2007, No. 2).

Note: Authority cited: Sections 39600, 39601 and 39662, Health and Safety Code. Reference: Sections 39650, 39660, 39661 and 39662, Health and Safety Code.