Landfill liner installation inspection

October 1, 2007  |  Products

From the GMA Techline Subject: Landfill liner installation inspection— I was hoping that maybe you would have information on training or certification on the inspection of installations of geomembrane liners for landfills. (Daniel, New York) Reply: We have the exact program you are looking for…
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Gas diffusion coefficients

October 1, 2007  |  Products

From the GMA Techline Subject: Gas diffusion coefficients— I am in the process of evaluating the mass flux of a gas moving through a 30-mil PVC geomembrane. I am working with volatile organic compounds in soils. What I need are typical values based on unsaturated soil vapors. I have found info…
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Here’s quite a pair: Geomembranes and butterflies

October 1, 2007  |  Products

New liner system installed in the Smithsonian’s Butterfly House Introduction This immersive exhibit explores the processes and patterns of evolution, and provides visitors with a new kind of experience in the National Museum of Natural History (NMNH)—a walk-through living butterfly house…
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Geotextile for base stability

October 1, 2007  |  Products

From the GMA Techline Subject: Geotextile for base stability— I am a landscape architect and value your Geosynthetics publication in my practice. While reading the June/July issue [and the article on] roads and housing on wet soils, a current project challenge of mine came to light: How to bes…
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New resin for geomembranes

August 1, 2007  |  Products

Dow Chemical Co. has announced the commercial availability of a new HDPE (high-density polyethylene) resin for use in geomembranes, the synthetic materials commonly used as impermeable liners in geotechnical engineering applications for environmental protection, water collection and preservation, an…
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Waterproofing job for Dubai tunnel

August 1, 2007  |  Products

The $3.3 million(U.S.) Jumeirah Vehicular Tunnel waterproofing project was completed in April. The 1,400m tunnel is the only link for vehicles between Jumeirah Palm Island and the crescent areas surrounding it at the spectacular palm island complexin Dubai. The waterproofing system, designed and exe…
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Background and most recent GRI standards

August 1, 2007  |  Products

By Bob Koerner In the 1980s, while supervising graduate research students in their geosynthetics theses topics, the issue of writing generic and standardized procedures arose in this (quite new at the time) geosynthetics field. Rob Swan generated our first formalized test methods with what became GR…
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Geotextile transport layer

June 1, 2007  |  Products

From the GMA Techline Subject: Geotextile transport layer We need some information about the characteristics of the transport layer (special geotextile) used in association with leak-detection sensors and placed between a drainage geocomposite layer (geonet plus geotextile separator) and the HDPE ge…
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Cost estimate data

June 1, 2007  |  Products

From the GMA Techline Subject: Cost estimate data In 2006, we completed a 30-acre pond (depth, approximately 30 ft.), and now we want to estimate the cost for a pond of similar size for a construction start in November 2007. For estimating purposes, are you able to suggest a percentage increase that…
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Geogrid-reinforced soil mat

June 1, 2007  |  Products

From the GMA Techline Subject: Geogrid-reinforced soil mat I am considering a geosynthetic-reinforced soil mat to be placed under a building structure with conventional footings. The purpose of the soil mat would be to limit differential settlement across the building footprint in event of seismical…
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