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Shale gas drilling wastewater
February 1st, 2015
Questions and answers from the GMA Techline Shale gas drilling wastewater Do you know what kind of radioactive isotopes are found in shale gas flowback ponds? (Ed | Texas) Hi Ed, Bromine, radium, and radon are commonly brought to the surface with hydraulic fracturing. These natural radioactive elements are present in low concentrations in the […]
Landfill stats
February 1st, 2015
Questions and answers from the GMA Techline Landfill stats How many landfills are there in the U.S.? How many of those are Subtitle D facilities? Of those, about how many have a cell that is lined each year? (Scott | USA) Scott, There are currently fewer than 2,000 active landfills in the U.S. Some think […]
Part 1: The first double geomembrane liner 40 years later
February 1st, 2015
First constructed in June 1974 and has been in continuous service since then. By J.P. Giroud and J.P. Gourc Introduction The first double liner with two geomembranes was constructed in June 1974 and has been in continuous service since then. The double-lined structure is a water reservoir located in Pont-de-Claix, near Grenoble in southeastern France. […]
Asphalt over geomembrane?
February 1st, 2015
Questions and answers from the GMA Techline Asphalt over geomembrane? We have a project where we want to place asphalt concrete over a 40mil-thick HDPE geomembrane. The asphalt concrete is 3in.-thick and would be the lining for a surface water ditch. On the outside of the ditch, we have a pavement section (asphalt concrete over […]
Geomembrane cushioning with geocomposites
February 1st, 2015
Geomembrane cushioning with geocomposites Geomembrane cushioning with geocomposites Questions and answers from the GMA Techline Geomembrane cushioning with geocomposites We’ve been doing work for some of our clients to try to use sub-angular crushed granite in leachate collection systems instead of rounded river-run gravel. The transportation costs for both materials are high here in Florida […]
Contact details
February 1st, 2015
Questions and answers from the GMA Techline Contact details We are carrying out a landfill capping job for a solid waste site. The slope is 1:1.75 and [is currently] lined with an HDPE liner. The height of the bund is approximately 12.0m. As per clients’ direction, we are supposed to lay a 200-gsm geotextile, followed […]
GCL internal strength
February 1st, 2015
Questions and answers from the GMA Techline GCL internal strength In section 6.3.4 of Designing with Geosynthetics Fifth Edition, the internal shear reinforcement for a GCL is calculated using the geogrid veneer reinforcement method. This results in an internal reinforcement strength using kN/m. Manufacturers of GCLs report their internal shear strengths in kPa. Do you […]
Geosynthetics article wins first-place gold
February 1st, 2015
IFAI titles take top honors at magazine awards ceremony By Ron Bygness A Geosynthetics magazine article featuring the management of the pond and reservoir systems at the Palo Verde Nuclear Generating Station has earned a first-place gold award for Best Technical Article from the Minnesota Magazine & Publishing Association (MMPA). The article, which ran as […]
Report from the North American Geosynthetics Society (NAGS)
February 1st, 2015
By Bob Mackey NAGS election results for 2015–2017 President—John Henderson President-elect—Richard Brachman Treasurer—Corey Bobba Vice Presidents—Dhani Narejo, John McCartney, Stan Boyle Congratulations to all! IGS proceedings library The International Geosynthetics Society (IGS) proceedings library is now online at www.geosyntheticssociety.org and can be accessed immediately to download papers from previous IGS conferences. This treasure trove of […]
Global Geosynthetics Summit
February 1st, 2015
By George Koerner As some of you know, the Geosynthetic Institute (GSI) and the Bombay Textile Research Association (BTRA) have had an association for more than five years. In September 2014, we advanced this relationship during the Global Geosynthetic Summit “Enhancing the Application of Geosynthetics in the Infrastructure Sector.” The summit was held Sept. 5–6 […]