Metals

Mean values of heavy metal content (mg/kg)

NPA Expressway

sample values

Background

sample values

Intervention values

Uncontaminated soil values

Cr

292.28 ± 7.82

1.80 ± 0.20

190.4

100

Pb

10.00 ± 2.00

1.00 ± 0.04

312

14

Zn

456.00 ± 5.00

3.80 ± 0.80

257.5

75

Mn

111.00 ± 7.00

5.00 ± 0.30

NL

960