The final IFAI Expo and my first Lobby Day

February 1, 2023  |  Editorial

October and November 2022 turned out to be memorable months as I had the chance to experience our final IFAI Expo in Charlotte, N.C., and my first—but our final—Lobby Day in Washington, D.C. You’ll find more about Lobby Day in the Update section and GMA column.
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Landfill Gas Emissions Modeling

February 1, 2023  |  Q&A: GMA Techline

Q: I’m writing to see if you are aware of any research on landfill gas (LFG) emissions modeling through various geomembranes, particularly for temporary covers? 
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Overlap seam specifications for geotextile separators

February 1, 2023  |  Q&A: GMA Techline

Q:What is the typical overlap for a geotextile used as a separator in a highway project?
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Transitioning from 30 MIL PVC geomembrane to 60 MIL HDPE

February 1, 2023  |  Q&A: GMA Techline

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 t…
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Strength Reduction Of Geogrids Used In Reinforced Walls

February 1, 2023  |  Q&A: GMA Techline

Q:At the moment there are two issues that create uncertainty with the use of PET fabrics and geogrids in the Netherlands. First, for many years we built pile-supported geosynthetic reinforced embankments (so-called piled mattresses to reduce settlements under embankments on soft soils). The fill is …
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Geomembranes with better performance

February 1, 2023  |  Q&A: GMA Techline

Q:We are researching liner alternatives for an industrial client that will have lined impoundments subject to high temperature influent (>140 degrees F), low pH (1 SU+/-), and may have organic contaminants. Are there any polyethylene geomembranes that meet these requirements? 
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Fall Lobby Day 2022 and GMA Leader of the Year

February 1, 2023  |  Update

Lobby Day 2022 took place on November 16, 2022, in Washington, D.C. Leading up to this year’s visit the Geosynthetic Materials Association (GMA) continued efforts to maintain its influence with federal and state governments. With the passage of the Bipartisan Infrastructure Law (BIL), conversation…
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Members Only  
Vegetated long-term solution for fly ash landfill capping project

February 1, 2023  |  Features

In 2019, a coal-fired power plant in Illinois was scheduled to be retired. The decision to close the plant was made to address the recently approved revisions to the Multi-Pollutant Standards rule from the Illinois Pollution Control Board.
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Members Only  
Innovative solution for ballast fouling

February 1, 2023  |  Features

Remy Steffer, director of engineering at the Port of Texas City, Texas City Terminal Railway Company, and Houston Belt and Terminal Railway, is very familiar with ballast fouling. Overseeing operations at a port facility south of Houston, Texas, Steffer has dealt with ballast fouling his entire care…
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Premier Product Showcase 2023

February 1, 2023  |  Features

Here is your first look at some of the new products and services that will be available from companies in 2023.
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