Environmental Engineering Reference
In-Depth Information
TABLE 9.7
Mean Concentrations of Heavy Metals by Geologic Unit and Land Use
Subsurface
mg/kg
GW/Surface
Ratio
Surface
mg/kg
Subsurface
mg/kg
GW/Surface
Ratio
Surface mg/kg
GW mg/L
GW mg/L
Arsenic (MCL = 0.05)
Barium (MCL = 2.0)
Geologic unit
Moraine
1.9
Na
0.04
a
0.021
31.0
Na
Na
Na
Outwash
3.6
Na
0.01
a
0.003
36.0
Na
0.5
0.014
Ssc
4.6
12
0.003
0.001
205.0
58.0
0.18
0.001
Sand
5.5
3.1
0.075
a
0.014
80.0
20.0
0.29
0.004
Sc
7.9
5.3
0.23
a
0.029
122.0
66.0
0.36
0.003
Clay
6.5
7.2
0.35
a
0.054
121.0
61.0
1.76
0.015
Land use
Commercial
5.1
5.6
0.14
a
0.027
69.0
55.0
0.61
0.009
Industrial
7.0
7.1
0.27
a
0.039
148.0
76.0
1.21
0.008
Residential
6.3
2.3
0.008
0.001
128.0
61.0
0.25
0.002
Cadmium (MCL = 0.005)
Chromium (MCL = 0.1)
Geologic unit
Moraine
0.38
Na
0.015
a
0.039
6.5
Na
0.008
0.001
Outwash
0.14
Na
0.0004
0.003
12.0
Na
0.039
0.003
Ssc
0.94
0.5
0.0045
0.005
17.3
9.8
0.05
0.003
Sand
0.9
0.4
0.06
a
0.067
30.5
10.9
2.17
a
0.071
Sc
3.5
1.0
0.008
a
0.002
63.6
21.0
0.89
a
0.014
Clay
3.9
0.94
0.038
a
0.009
52.5
48.2
3.1
a
0.059
Land use
Commercial
2.2
0.5
0.005
a
0.002
27.0
11.6
0.02
0.001
Industrial
4.5
1.9
0.076
a
0.017
55.0
27.0
4.87
a
0.089
Residential
1.1
0.4
0.02
a
0.018
31.0
25.4
0.37
0.001
Search WWH ::
Custom Search