|POND CONSTRUCTION||FLOOD MITIGATION||WELL SEALANT & GROUT|
|DAM/BERM CONSTRUCTION (CORE TRENCH)||STRUCTURE BEDDING||WETLAND RESTORATION|
|ANTI-SEEP COLLARS, TRENCH DAMS||SLOPE STABILIZATION|
|TEMPORARY & DIVERSION DAMS||LANDFILL PATCH|
AquaBlok particles expand when hydrated, with the degree of net vertical expansion determined largely by the formulation, application thickness, and salinity of the hydrating water. When a mass of particles is hydrated, the mass transforms into a continuous and relatively soft body of material. Once developed, the hydrated AquaBlok material can act as an effective physical, hydraulic, and chemical environmental barrier by virtue of its relatively cohesive and homogeneous character, low permeability to water, and chemically active (sorptive) nature.
AquaBlok can also provide substrate for wetland vegetation and habitat for macroinvertebrate organisms, particularly when additional organic material is provided, either as part of the product formulation or as a surficial dressing. The AquaBlok technology can also deliver plant seeds to a targeted area to facilitate wetland restoration (see discussions related to the SubmerSeed® technology, as well as chemical reagents for in situ treatment of environmental contaminants.
For many projects, AquaBlok use generally involves applying dry masses of the product through water and across the surface of contaminated sediments. In a matter of days, a homogeneous and relatively cohesive, low-permeability cap, or barrier, is formed between contaminated sediments and the overlying water column and its inhabitants. Barrier thickness will depend on a number of factors, including: type of formation, water depth and salinity, application thickness, number of lifts applied, and sediment characteristics.
AquaBlok can also be used as a hydraulic/chemical barrier to the movements of water- or sediment- borne contaminants into underlying groundwater resources, or to minimize leaching losses of water from reservoirs or wastewater discharge basins.
Effective management of contaminated sediments may involve remedial capping exclusively or an integration of capping with other management technologies like dredging and/or monitored natural recovery. In situ capping may also be integrated with in situ sediment treatment technologies to affect mass reduction of encapsulated contaminants.
AquaBlok can be handled and installed using commonly available equipment and technologies, including conveyors (e.g. Photograph 1), excavators, cranes with clamshell buckets, and even helicopters.
Other techniques could also be used to effectively install AquaBlok- based sediment caps. The most appropriate installation methods(s) will depend on a variety of factors including: water or shoreline access, bank slope, surface water characteristics and ecology, size of the project area, and relative costs.
Costs for implementing an AquaBlok-based capping remedy will vary widely depending on a number of project- and site-related factors that will collectively dictate the most appropriate AquaBlok formulation, cap design, and method for cap installation. Project costs will also depend on whether material is packaged and transported to the project site, or whether it is manufactured at or near the site. Costs associated with project planning and management; preliminary laboratory studies (if required); cap design; permitting; construction QC; long-term performance and monitoring; and cap maintenance should also be considered.
If you think the AquaBlok composite particle system could be of use in your remediation projects, call us. We will be happy to discuss your project with you, and help determine how the AquaBlok technology could integrate into a cost-effective solution.