New Product for Repair and Sealing of Penetrations to a Certified Landfill Cap

Released on: June 11, 2008, 10:15 am

Press Release Author: John A. Collins

Industry: Industrial

Press Release Summary: AquaBlok, Ltd., manufacturers of innovative composite
particle materials, announce the approval of a product formulation that has been
used successfully for the repair and sealing of certified landfill caps in various

Press Release Body: AquaBlok Bentonite Coated Aggregate Material Maintains Low
Permeability While Providing Ease of Installation for Vertical Well Casings and
Structural Support as a Pipe Bedding for Gas Piping

Re-establishment of the low permeability soil barrier is required when a certified
landfill cap is breached, whether as a result of disturbance by a pipe trench,
vertical gas pipe borehole installation configuration or joining FMLs to sheet pile
walls or other unique areas of landfill. The current standard process to replace
disturbed soil barriers in tight areas is very time consuming and cumbersome.

A photo of AquaBlok applied in such a horizontal pipe section is shown above.
AquaBlok material can simply be poured into the trench or annular opening in a
manner similar to gravel or other bulk backfill material.

AquaBlok Sealant Materials Self Compact for Low Permeability and Conform to Complex
Shapes such as Pipe Bedding, Methane Gas Wells and Sheet Pile Walls - without the
Use of Geotextiles or Liner Materials

Current construction practices to re-establish low-permeability conditions, which
are dictated by existing and relevant regulations, commonly involve the following
general procedure: digging trenches of various depths or drilling a boring (up to
three feet in diameter) through each of the surficial protective layer, the
low-permeability cap (including the FML component, if present) and finally down into
the landfill material. In the case of a vertical pipe section with a 6-12-inch
diameter perforated well casing in the boring, screened at the appropriate interval,
the annular space would be backfilled above the screened interval with low
permeability soils in a "step-cut" fashion to provide good bonding which results in
a much larger repair area than the actual perforation.

AquaBlok Landfill Applications:

.General Replacement for Bentonite Sealants
.Trenches / Pipe Bedding - Sealant
.Vertical Risers / Gas Vents and Well Heads
.Sheet Pile Wall / Sealant Transition to Geomembrane Liner

The use of an AquaBlok sealant material for landfill trenching, gas-well
construction or other general purposes eliminates the need to use compacted clay
material or step cut a trench or borehole to accommodate appropriate compaction. A
similar approach is used where AquaBlok is applied as a pipe bedding and sealant for
installation of horizontal pipe, where the landfill soil cap component has been

Use of AquaBlok for cap penetrations and as a pipe sealant has a number of
technical, economic, and regulatory based advantages over current construction
methods, including:

.Formulations of the product are comprised of sodium bentonite clay, and the
low-permeability (10-9 cm/s) and resiliency, or re-sealing ability, of such material
is well known to the environmental and regulatory community.

.The product self-compacts when wetted and hydrated. Consequently, the material can
be placed as a single dry lift, with water added afterwards. The material's
self-compacting ability precludes the need for additional excavation and therefore
use of clay and protective material, as well as compaction-driven backfilling. In
the case of a gas well, it can be constructed exclusively within the confines of the
existing borehole.

.In its dry form, the product handles easily, like aggregate. Thus, it can be
delivered to a site in packages varying from 50-lb sacks to two-ton super sacks and
either poured or shoveled by hand.

.The amount of water needed to initially hydrate the product, once placed into the
annular space, is not critical, thus precluding the need for neutron probe testing
during well construction.

The product's demonstrated abilities to act as a low-permeability, air-tight seal
greatly increases the potential for successful re-certification of the landfill cap
upon re-inspection.

About AquaBlok, Ltd.

AquaBlok, Ltd. is a manufacturer of composite materials utilizing its patented
coating and amendment approach. The company has a long history in the environmental
industry and a range of products utilized in sediment remediation technologies.
AquaBlok utilizes its delivery system in a range of products including, pond and
industrial impoundment sealing, as seep collars on piping, to construct cut-off
walls in porous soil conditions, flood control applications (i.e. levee and dam
protection), and to deliver organoclay-based materials. In addition, AquaBlok is a
licensee of Halliburton's Bariod Division for the BARACLEARŪ algae treatment

Please contact AquaBlok for pricing and/or distributor inquires.

Web Site:

Contact Details: AquaBlok, Ltd.
3401 Glendale Ave, Suite 300
Toledo, OH 43614


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