ACTIVE CAPPING

Active Capping provides immediate relief to the ecosystem while reducing long-term
levels of contamination.

Active Capping is defined as the incorporation of known treatment materials into a capping
system, with the goal of reducing toxicological risk factors by chemically altering contaminants,
adsorbing a portion of the contaminants or reducing flux that transports contaminants through a
permeable cap material. Active Capping provides immediate relief to the ecosystem while reucing
long-term levels of contamination that can impact the new clean benthic layer.


AquaBlok® use in Active Capping applications offers the following benefits:

  • Bulk Placement Through Water – Easy Application
  • Control of Treatment Layer Loading (amount of material placed) – In Single Lift
  • Ability to Implement Treatment Trains for Multiple Contaminants
  • Ability to Monitor Treatment Effectiveness – Conventional Cores
  • Uniform Delivery – Ability to mix treatment materials with sand or aggregate bulking materials and maintain uniform distribution of treatment materials


Many complex sediment sites suffer from a range of contamination issues that no single
treatment can effectively address.

AquaBlok materials can be handled with conventional equipment, or high volume material
handling equipment that can place a large amount of material in uniform thin layers quickly.
Generally, no sub-surface preparation is necessary with bulk material placement – material will
conform to debris or other variations. Bulk placement is not limited by water depth and can be
used in higher energy environments like tidal rivers.


Unlike treatment mats, placement of AquaBlok eliminates the need for divers, anchor trenches,
ballast, or the need to seams panels. AquaBlok and AquaGate®+ can be used in combination to
provide a Funnel & Gate approach to addressing groundwater upwelling or gas transmission.

Download Literature on AquaBlok