Environmental Engineering Reference
In-Depth Information
Table 5.5
Estimates of PCE and Ethanol Mass Remaining in Subsurface by
Various Methods
PCE
Ethanol
Ratio
Volume
(l)
Mass
(moles)
Volume
(l)
Mass
(moles)
Moles Ethanol:
Moles PCE
Extraction wells and
partitioning tracers
26
a
254
a
2720
b
47,234
186:1
Dissolved phase — after
solvent extraction
1.1
c
11
c
295
c
5119
c
465:1
Dissolved phase — after
residual biotreatment (2.5
years)
0.4
c
4
c
110
c
1926
c
482:1
Total system PCE, ethanol
from extraction well
concentration
265
47,234
178:1
Total system PCE, ethanol
from dissolved phase —
after solvent extraction
265
5119
19:1
a
Estimated by partitioning tracer data (Jawitz et al., 2000).
b
Estimated from recovery well concentrations (Jawitz et al., 2000).
c
Calculated from Surfer contour plots.
Table 5.6
Rate Constants for cis-DCE
Formation for Individual Wells
k
(μg/l/day)
Correlation
Coefficient
Well Name
C1
14.65
0.25
C2
57.29
0.59
C3
10.27
0.68
C4
4.67
0.27
MW-505
0.24
0.19
MW-506
0.0008
0.20
MW-507
0.003
0.28
MW-509
11.64
0.59
MW-510
1.09
0.49
MW-511
0.14
-1.47
MW-512
0.54
0.25
MW-513
6.29
0.54
MW-514
10.86
0.63
RW-3
6.32
0.79
RW-4
2.89
0.08
RW-6
4.27
0.50
RW-7
6.01
0.66
Average of RW-3,
RW-6, and RW-7
5.54
0.64
