Toxic Metal

Mean C s i

C n i

C f i

T r i

E r i

Risk Grade

As

0.197

13

1.52 × 10−02

10

1.97

Slight

Cd

0.102

0.3

3.40 × 10−01

30

3.06

Slight

Cr

1.855

90

2.06 × 10−02

2

3.71

Slight

Cu

2.129

45

4.73 × 10−02

5

10.645

Slight

Hg

−207.957

0.4

−5.20 × 1002

40

−8318.28

Slight