As

4.62E−03

4.30E−03^a

1.99E−05

Cd

6.52E−03

1.80E−03^a

1.17E−05

Cr (VI)

6.74E−04

1.20E−02^a

8.09E−06

Ni

3.14E−03

2.40E−04^a

7.55E−07

Pb

3.10E−01

1.20E−05^b

2.95E−06

Total ECR

4.34E−05