Environmental Engineering Reference
In-Depth Information
9/05
1/09
Multilevel sampler I...V
Water gauge
MDP 7
Aquitard
(silt)
MDP 6
RIL 1
IV
Soil gas
sampler
-12.0 m
RIL 2
II
V
BIL 2/09
MDP A/B
I
Balance
zone I
(plume fringe)
-16.0 m
Balance
zone I
(plume center)
Unconfined
aquifer
(coarse sand)
7/05 proj.
Bottom layer
(lignite)
0
10
20 m
2/04 proj.
-22.0 m
FIGURE 10.17
Test site scheme (left) and cross section (right) of the Profen gas PRB.
underlying impervious lignite layer. In this case, mass balancing of contami-
nants was limited.
The construction of the test site is presented in Figure 10.17. Packer sep-
arated double-valve pneumatic pumps (MDP 6/7) were used for the semi-
integrated groundwater sampling of 25-mm mini filters (MF) (Figure 10.8).
Period of operatrion of the Profen gas PRB
5000
Step I
Step II
Step III
Step IV
4500
4000
Obs. well 2/04
Plume center
upstream
3500
3000
2500
2000
1500
Obs. well 1/09
1000
Plume center
downstream
500
0
Jun-10 Jul-10 Aug-10 Sep-10 Oct-10 Nov-10 Dec-10 Jan-11 Feb-11 Mar-11 Apr-11 May-11 Jun-11 Jul-11
FIGURE 10.18
Impact of the Profen gas PRB to the groundwater load of balance zone I (plume center). The
downstream trend was maintained about 6 months after PRB operation stopped (not shown).
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