What makes them so important?
• Historical sources of contamination largely controlled
• Lack of disposal options is a major impediment to harbor development
<95% of shipping trade passes through dredged ports
• Significant impediment to unrestricted usage of waterways
• Widespread problem
< Of 21,000 national sediment sampling stations (1996 Survey)
26% exhibit potential of adverse effects
Additional 49% exhibiting intermediate probability of adverse effects
< About 30% of Superfund sites involve contaminated sediments
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