Environmental Engineering Reference
In-Depth Information
~1 Month Post-Flush
~2 Months Post-Flush
C7
C7
C3
C3
C4
C4
MW-512
MW-512
MW-513
MW-513
MW-514
MW-514
16000 mg/L
C2
C2
MW-505
MW-505
C1
C1
14000 mg/L
MW-506
MW-506
MW-509
MW-509
MW-510
12000 mg/L
MW-510
MW-511
MW-511
MW-507
MW-507
10000 mg/L
8000 mg/L
6000 mg/L
~3.5 Months Post-Flush
~5.5 Months Post-Flush
4000 mg/L
2000 mg/L
0 mg/L
C7
C7
C3
C4
C3
C4
MW-512
MW-512
MW-514
MW-513
MW-513
MW-514
C2
C2
MW-505
MW-505
C1
C1
MW-506
MW-506
MW-509
MW-509
MW-510
MW-511
MW-510
MW-511
MW-507
MW-507
Figure 5.11 Ethanol contour plots over the groundwater monitoring period (12,000
mg/l = 260 m M = 1.2%).
~9.5 Months Post-Flush
~13.5 Months Post-Flush
C7
C7
C3
C3
C4
C4
MW-512
MW-512
MW-513
MW-514
MW-513
MW-514
16000 mg/L
C2
C2
MW-505
MW-505
C1
C1
14000 mg/L
MW-506
MW-506
MW-509
MW-509
MW-510
MW-510
12000 mg/L
MW-511
MW-511
MW-507
MW-507
10000 mg/L
8000 mg/L
6000 mg/L
~19 Months Post-Flush
~22 Months Post-Flush
4000 mg/L
2000 mg/L
0 mg/L
C7
C7
C3
C3
C4
C4
MW-512
MW-512
MW-513
MW-514
MW-513
MW-514
C2
C2
MW-505
MW-505
C1
C1
MW-506
MW-506
MW-509
MW-509
MW-510
MW-510
MW-511
MW-511
MW-507
MW-507
Figure 5.12 Ethanol contour plots over the groundwater monitoring period (12,000
mg/l = 260 m M = 1.2%).
area. C1 and C2 maintained relatively high concentrations, and C3 and C4
appeared to have increasing concentrations of PCE for the first 6 months of
groundwater monitoring. Concentrations of PCE in all of these wells
decreased to less than 10 mg/l after 2 years of monitoring. It is interesting
to note that all wells showed a decrease in PCE concentration even though
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