APPENDIX D Standards for Exposure to Common Toxic Pollutants
Chemical Name CASRN
a
Empirical
Formula
b
Maximum
Contaminant
Level
(mg/L)
OSHA 8-h
Standard
(mg/m
3
)
2 acrolein 107-02-8 C
3
H
4
O 0.25
4 benzene 71-43-2 C
6
H
6
0.005
6 carbon tetrachloride 56-23-5 CCl
4
0.005
Chlorinated benzenes
7 chlorobenzene 108-90-7 C
6
H
5
Cl 0.1 350
8 1,2,4-trichlorobenzene 120-82-1 C
6
H
3
Cl
3
0.07
9 hexachlorobenzene 118-74-1 C
6
Cl
6
0.001
Chlorinated ethanes
10 1,2-dichloroethane 107-06-2 C
2
H
4
Cl
2
0.005
11 1,1,1-trichloroethane 71-55-6 C
2
H
3
Cl
3
0.2
12 hexachloroethane 67-72-1 C
2
Cl
6
10
13 1,1-dichloroethane 75-34-3 C
2
H
4
Cl
2
40
14 1,1,2-trichloroethane 79-00-5 C
2
H
3
Cl
3
0.2 45
15 1,1,2,2-tetrachloroethane 79-34-5 C
2
H
2
Cl
4
35
23 chloroform
Dichlorobenzens
67-66-3 CHCl
3
240
25 1,2-dichlorobenzene 95-50-1 C
6
H
4
Cl
2
0.6 300
27 1,4-dichlorobenzene 106-46-7 C
6
H
4
Cl
2
0.075 450
Dichlorobenzidine
28 3,3-dichlorobenzidine 91-94-1 C
12
H
10
Cl
2
N
2
Dichloroethylenes
29 1,1-dichloroethylene 75-35-4 C
2
H
2
Cl
2
0.007
30 1,2-trans-dichloroethylene 156-60-5 C
2
H
2
Cl
2
0.1
Dichloropropylene
32 1,2-dichloropropane 78-87-5 C
3
H
6
Cl
2
0.005 350
38 ethylbenzene 100-41-4 C
8
H
10
435
Halomethanes
44 dichloromethane 75-09-2 CH
2
Cl
2
0.005
47 bromoform 75-25-2 CHBr
3
5
50 dicholorodifluoromethane 75-71-8 CCl
2
F
2
495
54 isophorone 78-59-1 C
9
H
14
O 140
55 naphthalene 91-20-3 C
10
H
8
50
56 nitrobenzene 98-95-3 C
6
H
5
NO
2
5
Nitrophenols
60 4,6-dinitro-o-cresol 534-52-1 C
7
H
6
N
2
O
5
0.2
Nitrosamines
64 pentachlorophenol 87-86-5 C
6
HCl
5
O 0.5
Phthalate esters
65 di(2-ethylhexyl) phthalate 117-81-7 C
24
H
38
O
4
0.006 5
67 dibutyl phthalate 84-74-2 C
16
H
22
O
4
5
70 dimethyl phthalate 131-11-3 C
10
H
10
O
4
5
84 tetrachloroethylene 127-18-4 C
2
Cl
4
0.005
85 toluene 108-88-3 C
7
H
8
1
Pesticides and metabolites
88 aldrin 309-00-2 C
12
H
8
Cl
6
0.25
89 dieldrin 60-57-1 C
12
H
8
Cl
6
O 0.25
90 chlordane (technical
mixture and metabolites)
12789-03-6 C
10
H
6
Cl
8
0.5
876