Environmental Engineering Reference
In-Depth Information
TABLE 8.2
Cumulative Average Yearly Concentrations (Cd, As, Pb Since 2006; Ni Since 2008) and 2010 Average Concentrations for Locations
Upgradient and within PRB
Cumulative Yearly Average (
μ
g/L)
2010 Data
TEPA-1
TEPA-2
TEPA-5
TEPA-6
TEPA-1
TEPA-2
TEPA-5
TEPA-6
Pb (A/B)
10.9
14.8
93.6
90.9
26.9
13.1
29.6
8.8
Pb (C/D)
0.369
0.560
0.892
0.329
0.256
0.832
0.726
0.170
% Pb removed
96.6
96.2
99.0
99.6
99.0
93.6
97.5
98.1
Cd (A/B)
302
461
254
136
384
470
113
17.0
Cd (C/D)
0.039
0.017
0.074
0.028
0.004
0.020
0.246
0.048
% Cd removed
100
100
100
100
100
100
99.8
99.7
Ni (A/B)
213
346
291
409
189
286
233
395
Ni (C/D)
26.5
23.7
9.57
17.3
24.4
4.89
2.25
2.94
% Ni removed
87.6
93.2
96.7
95.8
87.1
98.3
99.0
99.3
As (A/B)
6.33
13.8
139
52.3
7.78
9.59
58.7
30.8
As (C/D)
1.75
7.14
3.81
5.66
1.60
6.19
2.20
2.94
% As removed
72.4
48.1
97.3
89.2
79.5
35.5
96.3
90.5
Note:
A/B denotes average of A + B concentrations upgradient of PRB; C/D denotes average of C + D concentrations within PRB.
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