Table 5.100
Toxicity factor value of pollutant of concern
No. Pollutants
Oral slope factor
Inhalation unit risk
Oral reference dose Inhalation reference
concentration
EPA toxicity
classification
SF
o
IUR
RfD
o
RfC
1/(mg/kg/d) References 1/(mg/m
3
) References mg/kg/d
1/(mg/kg/d) References 1/(mg/m
3
)
1
Nitrites
–
–
–
–
1.00E−01 EPA-I
–
–
NA
–
2
KNO
3
–
–
–
–
1.60E+00 EPA-I
–
–
NA
–
3
Ammonia
–
–
–
–
–
–
1.00E−01 EPA-I
NA
–
4
F
–
–
–
–
4.00E−02 R369
1.30E−02 R369
NA
–
5
Cl
–
–
–
–
1.00E−01 EPA-I 1.50E−04 A
NA
–
6
Cyanide
–
–
–
–
6.00E−04 EPA-I 8.00E−04 R369
D
EPA-I
7
Phenol
–
–
–
–
3.00E−01 EPA-I 2.00E−01 R369
D
EPA-I
8
Hg (inorganic)
–
–
–
–
3.00E−04 EPA-I 3.00E−04 R369
D
EPA-I
9
As (inorganic) 1.50E+00
EPA-I
4.30E+00 EPA-I
3.00E−04 EPA-I 1.50E−05 R369
A
EPA-I
10
Mn
–
–
–
–
1.40E−01 EPA-I 5.00E−05 EPA-I
D
EPA-I
11
Cd
–
–
1.80E+00 EPA-I
1.00E−03 EPA-I 1.00E−05 R369
B1
EPA-I
12
Zn
–
–
–
–
3.00E−01 EPA-I
–
–
D
EPA-I
13
Cr(VI)
5.00E−01
R369
8.40E+01 R369
3.00E−03 EPA-I 1.00E−04 EPA-I
A
EPA-I
14
Pb
–
–
–
–
–
–
–
–
–
–
5.5 North China
283