Sediment Remediation

Providing solutions for all types of Sediment Remediation projects

Many factors go into the decision for a remedial design of contaminated sediments. CETCO can assist engineers with design evaluations and provide technical assistance with modeling cap life or potential stabilization or solidification mix designs. Regardless of the remedy, our technical team is able to assist.

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Overview

Active capping

Traditional remediation methods for contaminated sediment, such as dredging and sand caps, may provide widely varying results due to environmental and operational factors. Active capping may offer advantages over these methods, and continue to gain acceptance worldwide.

Sediment capping designs include a chemical isolation layer of material over the contaminated sediment, reducing the potential for contaminant exposure by preventing resuspension and transport to other non-affected areas. Traditionally, a thick layer of clean sand served as the chemical isolation layer. While thick sand caps may function adequately in certain situations the thickness of sand required is not feasible for some sites. Reactive Core Mat® (RCM) provides a highly adsorptive attenuation layer reducing the overall thickness requirement in the cap design. CETCO offers RCM with various media, depending on the contaminants of concern.

In situ treatment

In situ stabilization allows for treatment of the contaminated sediments in place, reducing contaminant leaching into nearby water sources. Treating contaminated sediments on-site alleviates off-site transportation and disposal concerns and conserves landfill capacity, replacement fill, and fuel used in transportation.

Advantages over traditional Sediment Remediation methods

Better consistency of protection
No inaccuracy of mass removal techniques
Eliminates effects of mass removal upon downstream areas
Requires less space than traditional sand caps
Lower cost alternative to dredging and disposal