The GMA Techline

February 1st, 2021

Moderated by George R. Koerner BIOLOGICAL DEGRADATION OF PE AND PP Q: Can you please enlighten me on the biological degradation of polyolefin polyethylene (PE) and polypropylene (PP)? A: Within the various plant forms of biological life, i.e., bacteria, actinomycetes, fungi and algae, polymer degradation is essentially nonexistent due to high molecular weight of the common […]

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Distinctive uses of geosynthetics

October 1st, 2020

This issue of Geosynthetics takes a look at bridges, drainage/coal combustion residuals and highways/geosynthetic wall systems. It’s a diverse issue showing the breadth of geosynthetics applications. Patricia Guerra-Escobar’s “Reinforced embankments for the causeway for a North Wales bridge project” examines the use of geogrids in the replacement of a 160-year-old bridge in the U.K. “CCR […]

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CCR landfill final cover test pad—Part 2

October 1st, 2020

By Nina J. Balsamo, John Massey-Norton, John R. Klamut, Terry Queen,Charles F. Straley and Mark R. Lehner FIGURE 1 Test pass of loaded 45-ton (40.8-tonne) truck over 3 feet (0.9 m) of cover soil on bench An integrated drainage system (IDS) geomembrane, which provides both a low-permeability membrane and drainage space above the geomembrane, is […]

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CCR landfill final cover test pad—Part 1

August 1st, 2020

By Nina J. Balsamo, John Massey-Norton, John R. Klamut, Terry Queen,Charles F. Straley and Mark R. Lehner An integrated drainage system (IDS) geomembrane, which provides both a low-permeability membrane and drainage space above the geomembrane, is being used in the final cover at a coal combustion residuals (CCR) landfill in West Virginia. Part 1 of […]

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Geosynthetics plays a prominent role

August 1st, 2020

From the Panama Canal to coal ash containment in West Virginia to polyvinyl chloride (PVC) sheet piling in several U.S. states, geosynthetics solve problems. The versatility of the different types of geosynthetics makes them useful in many situations. In “Innovative Geosynthetics Solution Saves 106-Year-Old Panama Canal Structures,” geotextile bags solve an interesting underwater erosion control […]

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EPA finalizes revisions to the coal ash closure regulations, increases public access to information

July 30th, 2020

On July 29, the U.S. Environmental Protection Agency (EPA) finalized several changes to the regulations for coal combustion residuals, known as CCR or coal ash, to implement the court’s vacatur of certain closure requirements as well as adding provisions that enhance the public’s access to information about the management of coal ash at electric utilities. […]

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EPA proposes additional amendments to the regulations for coal combustion residuals

February 20th, 2020

The U.S. Environmental Protection Agency (EPA) announced further proposed revisions and flexibilities to the regulations for the management of coal combustion residuals (CCR), commonly known as coal ash, from electric utilities. “This proposal is the last in a set of four planned actions we are taking under the Trump Administration to stabilize coal ash regulations […]

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FGI CCR short course addresses current regulations and solutions

December 16th, 2019

By Timothy D. Stark and Jennifer Miller The Fabricated Geomembrane Institute (FGI) presented a short course in Charlotte, North Carolina, on Nov. 6, 2019, at the Center City Building to a sold-out crowd. The short course was organized by the FGI and was offered in collaboration with the University of North Carolina at Charlotte (UNCC).   […]

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FGI offers coal combustion residuals short course in North Carolina

October 7th, 2019

The Fabricated Geomembrane Institute (FGI) is offering a one-day short course on Coal Combustion Residuals (CCRs): Current Regulations and Solutions. The short course will take place on Nov. 6 at the Center City Building near the University of North Carolina Charlotte campus. Attendees will gain a broad knowledge of current and emerging CCR regulations, local experience managing […]

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Lessons learned in alternative coal ash pond closure design and construction

October 1st, 2019

By Anna M. Saindon Coal ash pond closures often face unique challenges due to location, available borrow soils and construction constraints. These challenges can lead to alternative methods of closure to comply with Resource Conservation and Recovery Act (RCRA) Subtitle D and coal combustion residuals (CCR) regulations. This article summarizes the construction of the first […]

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