Metal

Range

Means

CV

The second level criterion of Standard

of Soil Environment (mg/kg)^a

The third level criterion of Standard

of Soil Environment (mg/kg)^b

pH < 5.5

5.5 ≤ pH < 6.5

6.5 ≤ pH < 7.5

>7.5

pH > 6.5

Cr

25.04 - 48.15

37.24

17%

120

150

200

250

300

Cu

40.10 - 94.60

60.76

26%

50

50

100

100

400

Zn

35.14 - 110.48

80.49

28%

150

200

250

300

500

Pb

38.86 - 245.36

145.99

47%

80

80

80

80

500