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Active capping continues to offer many advantages that can be tailored to each specific application, including both partial and full sediment capping. Sediment capping involves the sub-aqueous placement of a barrier layer of material over contaminated sediment. Sediment capping reduces the potential for contaminant exposure by preventing re-suspension and transport to other non-affected areas. CETCO's Organoclay can be deployed in bulk or as part of a sand cap. Additionally Organoclay or activated carbon can be deployed as part of Reactive Core Mat (RCM). Many factors go into the decision for a remedial design of contaminated sediments. Contact us for assistance with designing active capping systems.
Deployed as an active in situ treatment layer directly over contaminated sediment, REACTIVE CORE MAT can be deployed instead of - or in combination with - dredging. Depending on site conditions, traditional sand caps may prove unfeasible, or result in an excessively thick design. Active cap designs incorporate adsorptive media to capture the contaminants and result in a reduced cap thickness.
REACTIVE CORE MAT is a patented permeable composite mat that encapsulates active material(s) between two layers of adhered, non-woven carrier geotextiles. Allowing water to pass through the active material to remove the contaminant while physically isolating contaminated sediments from the environment of the reestablished benthic zone.
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