Table 2. Evaluation Factors for the Evaluation of Remedial Technologies
Table 2. Evaluation Factors for the Evaluation of Remedial Technologies |
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Monitored natural recovery |
In Situ treatment | Capping | Removal | |||||
Characteristics | MNR | EMNR | conventional capping | amended capping | hydraulic dredging | mechanical dredging |
excavation |
|
Physical characteristics |
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Sediment stability |
H | H | H | M | M | L | L | L |
Sediment deposition rate |
H | H | H | M | M | L | L |
L |
Erosional potential of bedded sediments |
H | H | H | M | M | L | L |
L |
Water depth |
M | M | H | H | H | H | H |
H |
In-water & shoreline structure |
M | M | M | M | M | H | H |
H |
Presence of hard bottom |
M | M | L | L | L | H | H |
H |
Presence of debris | L | L | M | M | M | H | H |
M |
Hydrodynamics |
H | H | H | H | H | M | M |
M |
Slope and slope stability | M | M | H | H | H | M | M |
M |
Groundwater/surface water interaction |
H | H | H | H | H | L | L | M |
Sediment and porewater geochemitry | M | M | H | M | H | L | L |
L |
Sediment characteristics |
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Geotechnical properties |
M | M | M | H | H | H | H | H |
Grain size distribution |
L | L | M | L | L | M | L |
L |
Potential for resuspension/release /residual |
L | L | M | M | M | H | H |
H |
Sediment consolidation (pore-water expression) liquifaction | L | L | M | H | H | L | L |
L |
Benthic community structure |
M | M | M | H | H | L | L |
L |
Contaminant characteristics |
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Horizontal and vertical distribution of contamination |
H | H | H | H | H | H | H | H |
Contaminant type |
H | H | H | M | M | H | H | H |
Contaminant concentration |
H | H | H | H | H | H | H |
H |
Exposure pathway |
H | H | H | M | M | L | L | L |
Presence of source material |
H | H | H | H | H | H | H | H |
Contaminant mobility | H | H | H | H | M | M | M |
L |
Contaminant bioavailability | H | H | H | L | L | L | L |
L |
Contaminant bioaccumulation and biomagnification potential |
H | H | H | L | L | L | L | L |
Contaminant transformation/degradation |
H | H | H | M | M | L | L | L |
Source identification and control |
H | H | H | H | H | H | H |
H |
Ebullition |
L | L | M | M | M | L | L | L |
Background | H | H | H | H | H | H | H |
H |
Land and waterway use characteristics |
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Watershed sources and impacts |
H | H | H | H | H | H | H | H |
Cultural and archaeological resources |
L | M | M | M | M | H | H | H |
Site access (staging, treatment, transport, disposal) | M | M | M | H | H | H | H |
H |
Current and anticipated waterway use | M | M | M | L | L | H | H |
H |
Current and future land use |
L | L | L | L | L | M | M |
M |
- H: Critical
- M: Contributing
- L: Unimportant