California Code of Regulations › Title 27 - Environmental Protection › Division 4 - Office of Environmental Health Hazard Assessment › Chapter 1 - Safe Drinking Water and Toxic Enforcement Act of 1986 › Article 7 - NO Significant Risk Levels › Section 25705 - Specific Regulatory Levels Posing No Significant Risk

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
				  Daily exposure to a chemical at a level which does not exceed the level set
				  forth in subsections (b), (c) and (d) for such chemical shall be deemed to pose
				  no significant risk within the meaning of Section
				  25249.10(c) of
				  the Act.
(b) Levels of exposure
				  deemed to pose no significant risk may be determined by the lead agency based
				  on a risk assessment conducted by the lead agency pursuant to the guidelines
				  set forth in Section
				  25703, or a risk assessment
				  reviewed by the lead agency and determined to be consistent with the guidelines
				  set forth in Section
				  25703.
(1) The following levels based on risk
				  assessments conducted or reviewed by the lead agency shall be deemed to pose no
				  significant risk:
Chemical
							 Name
Level (micrograms/day)
Acrylonitrile
0.7
Aldrin
0.04
Antimony Oxide (Antimony Trioxide)
0.13 (inhalation)
Arsenic
0.06 (inhalation)
Asbestos
100 fibers
							 inhaled/day*
Benz[a]anthracene
0.033 (oral)
Benzene
6.4 (oral)
13 (inhalation)
Benzidine
0.001
Benzo[b]fluoranthene
0.096 (oral)
Benzo[j]fluoranthene
0.11 (oral)
Benzofuran
1.1
Bis(2-chloroethyl)ether
0.3
Bis(chloromethyl)ether
0.02
Bromochloroacetic acid
0.70
Bromodichloroacetic acid
0.95
Bromoethane
96
Bromoform
64
Butylated hydroxyanisole
4000
Cadmium
0.05 (inhalation)
Carbon tetrachloride
5
N-Carboxymethyl-N-nitrosourea
0.70
p
-Chloroaniline
1.5
p
-chloro-?,?,?-trifluorotoluene
23
p
-Chloroaniline hydrochloride
1.9
Chloroethane
150
Chlorothalonil
41
Chromium (hexavalent compounds)
0.001 (inhalation)
Chrysene
0.35 (oral)
C.I. Direct Blue 218
50
DDT, DDE and DDD (in combination)
2
7H-Dibenzo[c,g]carbazole
0.0030 (oral)
Dibenzo[a,h]pyrene
0.0054 (oral)
Dibenzo[a,i]pyrene
0.0050 (oral)
1,2-Dibromo-3-chloropropane (DBCP)
0.1
Dibromoacetic acid
2.8
Dichloroacetic acid
17
para-Dichlorobenzene
20
3,3'-Dichlorobenzidine
0.6
Dichloromethane (Methylene chloride)
200 (inhalation)
1,2-Dichloropropane
9.7
1,3-Dichloropropene
3.7 (oral)
3.7 (inhalation)
Dieldrin
0.04
Di(2-ethylhexyl)phthalate (DEHP)
310
Diisononyl phthalate (DINP)
146
3,3'-Dimethoxybenzidine
0.15
3,3'-Dimethoxybenzidine dihydrochloride
0.19
3,3'-Dimethylbenzidine
0.044
3,3'-Dimethylbenzidine dihydrochloride
0.059
1,4-Dioxane
30
Epichlorohydrin
9
Ethylbenzene
54 (inhalation)
41 (oral)
Ethylene dibromide
0.2 (ingestion)
3 (inhalation)
Ethylene dichloride
10
Ethylene oxide
2
Glycidol
0.54
Glyphosate
1100
Hexachlorobenzene
0.4
Hexachlorodibenzodioxin
0.0002
Hexachlorocyclohexane (technical grade)
0.2
Lead
15 (oral)
Lead acetate
23 (oral)
Lead phosphate
58 (oral)
Lead subacetate
41 (oral)
Malathion
180
2-Methylaziridine (propyleneimine)
0.028
5-Methylchrysene
0.0084 (oral)
Methylhydrazine
0.058 (oral)
0.090 (inhalation)
Methylhydrazine sulfate
0.18
4-Methylimidazole
29
5-Morpholinomethyl-3-[(5-nitrofurfurylidene)-amino]-2-oxazolidinone
0.18
MX (3-chloro-4-(dichloromethyl)-5-hydroxy-2
							 (
5H
)-furanone)
0.11
Naphthalene
5.8
Nitromethane
39
N-Nitroso-n-dibutylamine
0.06
N-Nitrosodiethylamine
0.02
N-Nitrosodimethylamine
0.04
N-Nitrosodiphenylamine
80
N-Nitrosodi-n-propylamine
0.1
N-Nitroso-N-ethylurea
0.03
N-Nitroso-N-methylurea
0.006
Phenyl glycidyl ether
5.0
Phenylhydrazine
1.0
Phenylhydrazine hydrochloride
1.4
Polybrominated biphenyls
0.02
Polygeenan
1200
Styrene
27
2,3,7,8-Tetrachlorodibenzo-p-dioxin
0.000005
Tetranitromethane
0.059
Toxaphene
0.6
Trichloroacetic acid
9.9
Trichloroethylene
14 (oral)
50 (inhalation)
2,4,6-Trichlorophenol
10
2,4,6-Trinitrotoluene
8.2
Tris(1,3-dichloro-2-propyl) phosphate (TDCPP)
5.4
Urethane
0.7
Vinyl chloride
3
Vinylidene chloride
0.88
2,6-Xylidine
110
__________
* Fibers equal to or greater than 5 micrometers in length
					 and 0.3 micrometers in width, with a length to width ratio of greater than or
					 equal to 3:1 as measured by phase contrast microscopy.