GCL used to cap former arsenic processing plant

October 12th, 2023

The New South Wales, Australian government has completed a $3.4 million project to remediate contamination at the former Jennings Processing Plant near Tenterfield, cleaning up a legacy polluted site almost 100 years since it closed. It took years of planning to excavate and contain soil contaminated at the former Jennings Processing Plant. The Crown Lands […]

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COMANCO makes progress on liner and earthwork for Arcadia, Fla. landfill

April 13th, 2023

COMANCO’s superintendents Jeremy Giles and Gerardo Ruiz are making progress on the liner and earthwork for a landfill cell in Arcadia, Fla. The team is currently in the final phase of the north subgrade, using geosynthetic clay liner. They have also begun excavation for the anchor trench and are installing a 60mil liner on the […]

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Transitioning from 30 MIL PVC geomembrane to 60 MIL HDPE

February 1st, 2023

Q:I have a client that operates a Subtitle C landfill that utilizes a double-liner system of 30 mil (0.76mm) PVC geomembrane for the base liner. They are wanting to evaluate the possibility to transition from 30 mil (0.76 mm) PVC to 60 mil (1.52 mm) high-density polyethylene (HDPE) geomembrane for the base liner system. In […]

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Central Coast Council opens $9 million landfill cell at Buttonderry Waste Management Facility

December 6th, 2022

Central Coast Council has completed one of its most significant projects recently undertaken – a new $9 million landfill cell at Buttonderry Waste Management Facility in Wyong, NSW, Australia. With its existing landfill cell, which was constructed in 2013, reaching its end of life, the council has designed and constructed a new modern engineered landfill […]

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Geosynthetic clay liner with aquiclude

August 1st, 2022

Q: We are trying to design and construct an aquiclude with a geosynthetic clay liner (GCL). Do you have any experience with this application where a GCL has been used as the impervious barrier between a flowing stream and the underlain geologic formation? A: I have not heard of a GCL being used alone in […]

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Stacking GCL rolls

June 1st, 2022

Q: I have a question regarding the storage and handling of geosynthetic clay liner (GCL) rolls. The manufacturer allows stacking up to five GCL rolls. Is this okay? A: The answer depends on the subgrade under the stacked GCL rolls and the equipment you are using to handle the rolls. In a manufacturing plant, with […]

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GCL-GM geocomposite: Which end is up?

April 1st, 2022

Q: In a geosynthetic clay liner-geomembrane (GCL-GM) geocomposite, does it make any difference which side of the geocomposite is up: GM or clay? A: This is a very detailed question that is application specific. The following design details all need to be considered: Is the GCL-GM geocomposite used for a liner or a cover, is […]

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Impregnation of GCLs

April 1st, 2022

Q: We are confused with the term “impregnation” as it relates to seaming geosynthetic clay liners (GCLs). There are two types of impregnations: (1) Edge impregnation, and (2) complete nonwoven (cap layer) impregnation of GCLs. How does a manufacturer do this? A: The edge impregnation of GCLs (1) is done in the field by an […]

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Geosynthetics for Alaska landfill closure

February 23rd, 2022

Solmax provides a combination of geosynthetics for Alaska landfill closure project with multiple geotechnical challenges. Installation of geosynthetics at the Homer Solid Waste Facility landfill in Alaska. Photograph courtesy of Solmax Kenai Peninsula Borough in southern Alaska needed to complete phase two of a landfill-closure project at its Homer (Alaska) Solid Waste Facility. This involved […]

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Reinforced levees to induce seepage path around geogrid layers?

February 1st, 2022

FIGURE 1 Reinforced levee expansion over existing dike using geosynthetics The Geosynthetic Institute (GSI) has been asked many times regarding several applications for different styles of geogrids if reinforced levees will induce a seepage path adjacent to and around geosynthetic layers. At this point, GSI has no case histories where it can quantify such behavior […]

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