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 Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
xii
Conversion Factors, Non-SI to SI Units of Measurement . . . . . . .
xiv
1--Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Background . . . . . . . . . .
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Purpose and Scope . . . . . .
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Regulatory Setting . . . . . .
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Overview and Description of
the Capping Process
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Organization of this Report .
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2--Design/Management Sequence for Capping . . . . . . . . . . . .
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Design Philosophy for Capping . . . . . . . . . . . . . . . . . . .
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Dredged Material Capping Functions . . . . . . . . . . . . . . . .
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Summary of Design Sequence for Capping . . . . . . . . . . . . .
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Need for Sediment Characterization . . . . .
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Characterization of Contaminated Sediment
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Selection of Capping Sediment . . . . . . .
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Characterization of Capping Sediment . . .
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Sampling and Testing Plans . . . . . . . . .
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4--Site Selection Considerations for Capping . . . . . . . . . . . . .
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General Considerations for
Site Selection
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Bathymetry . . . . . . . . .
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Currents . . . . . . . . . . .
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Average Water Depths . .
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Operational Requirements
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5--Equipment and Placement Techniques . . . . . . . . . . . . . . .
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Flow and Mounding Versus Dredging Method . . . .
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Considerations for Contaminated Material Dredging
and Placement . . . . . . . . . . . . . . . . . . . . .
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Considerations for Capping Material Placement . . .
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Equipment and Placement Techniques . . . . . . . .
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Geotechnical Compatibility of Operations . . . . . .
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38
Exposure Time Between Placement of Contaminated
Material
and Cap . . . . . . . . . . . . . . . . . . . . . . . . .
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39
Navigation and Positioning Controls . . . . . . . . .
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42
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