IA

KS

NE

Chemical

Cr

Pb

Zn

Cr

Pb

Zn

Cr

Pb

Zn

Max

62

48.5

153

88

450

270

62

110

121

Min

7

8.4

12

7

9.8

12

2

9.1

9

Average

42.48

23.06

81.88

34.31

26.58

68.49

23.02

18.95

47.13

SD

9.99

6.83

26.79

12.91

52.32

36.30

12.49

9.37

22.85