Cr

Ni

Cu

Zn

As

Cd

Pb

December

67.4

27.3

29.7

125

31.0

0.36

32.7

January

64.5

26.1

27.0

122

30.8

0.32

39.7

March

68.8

28.0

31.0

130

30.1

0.38

36.2

April

68.0

26.8

29.4

124

30.3

0.36

36.1

May

68.5

27.6

30.1

127

30.5

0.36

39.8

June

68.3

28.0

30.6

127

31.1

0.35

39.6

Range

64.5 - 68.8

26.1 - 28.0

27.0 - 31.0

122 - 130

30.1 - 31.1

0.31 - 0.38

32.7 - 39.8

Mean ± SD

67.6 ± 1.60

27.3 ± 0.76

29.6 ± 1.40

126 ± 2.73

30.6 ± 0.41

0.35 ± 0.02

37.4 ± 2.86

Soil^a

50.5

14.4

17.0

47.3

8.9

0.056

36