As

Cd

Cr

Co

Cu

Hg

Mo

Ni

Pb

Tl

Zn

Normal concentration

<60*

<0.67

<116

<25.9

<42.7

<0.3*

<1.6

<61.5

<62.3

<1.37

<160.9

Low contamination

60 - 284

0.67 - 0.99

116 - 200*

25.9 - 38.1

42.7 - 100*

0.3* - 1.0

1.6 - 2.31

61.5 - 91.6

62.3 - 100*

1.37 - 1.96

160.9 - 231.5

High contamination

284 - 2840

0.99 - 9.9

200 - 2000

38.1 - 381

100 - 1000

1.0 - 10

2.31 - 23.1

91.6 - 916

100 - 1000

1.96 - 20.0

231.5 - 2315

Very high contamination

>2840

>9.9

>2000

>381

>1000

>10.0

>23.1

>916

>1000

>20.0

>2315