Environmental Engineering Reference
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pH
250
200
Fe(OH)
3
150
MWG104A
100
MWG104B
MWG104C
50
MWG105A
MWG105B
0
MWG105C
6
7
8
9
10
11
12
MWG103A
-50
MWG103B
MWG103C
-100
Alpha-FeOOH
-150
-200
Fe
3
(OH)
8
-250
FIGURE 7.17
Field Eh and pH measured at ZVI PRB monitoring locations plotted on the iron Eh-pH stabil-
ity diagram.
determine the cause. Monitoring during the second year of operation has
included monitoring locations 50 m downgradient of the PRB, which to date
have detected concentrations of VC only marginally above detection limits.
The results to date indicate that the sequencing of PRBs can be successful
in targeting different chemicals of concern and should be considered when
investigating potential remediation options.
Acknowledgments
This project was conducted for LandCorp and the Department of Environ-
ment and Conservation of Western Australia. Funding for the project was
provided from the Western Australian Contaminated Sites Management
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