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Case Study: Capping semi-liquid solids with geosynthetic layers

October 1, 2016

Introduction A U.S.-based polyethylene and polyester resin/polymer producer recently closed a manufacturing facility in Wilmington, N.C. (Photo 1). The company hired an engineering firm to manage the demolition and removal of the expansive structures and infrastructure. Part of the environmental responsibilities was to also find a viable solution for closing a 12-acre sludge basin. But …

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‘Subtitle C’ mixed waste embankment cover system

August 1, 2015

Introduction This case history focuses on the construction of a crucial thin rock layer over geosynthetics and the solution encountered during the first construction phase of an RCRA Subtitle C embankment cover system at a hazardous and radioactive disposal site. The top and 5:1 sideslopes of the cover system were constructed with a cap consisting …

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Geosynthetic opportunities in shale gas fracking (revisited)

April 1, 2015

By Robert M. Koerner, George R. Koerner, and Archie Filshill Introduction Energy is clearly the driver of almost every activity that the world and its inhabitants rely on and fully utilize. At issue is “what type of energy?” and the answer (as if there even exists a single answer) is largely geographically dependent. Currently, the …

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Closing the Crazy Horse Landfill

February 1, 2014

First large-scale landfill closure in California to use artificial turf closure system By Christopher M. Richgels 1.0 Introduction The Crazy Horse Landfill (CHLF) is located on a 160-acre parcel west of, and adjacent to, Crazy Horse Canyon Road about nine miles north of the city of Salinas in northern Monterey County, Calif. The landfill, owned …

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Geosynthetics: The solution for managing nuclear power generation water supply in an arid environment

October 1, 2013

By Chris Eichelberger, Gerald Hersh, and Shabbir Pittawala 1.0 Introduction The Palo Verde Nuclear Generating Station is located 55 miles west of downtown Phoenix and is the largest power producer of any kind in the United States. Its three units are capable of generating more than 4,000 megawatts of electricity. The facility provides power to …

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Geosynthetic lining systems for shale gas drilling activities

Usage, regulations, concerns, and challenges By Theresa Andrejack Loux and Archie Filshill 1. Introduction Natural gas has long been used to heat buildings and, more recently, to fuel internal combustion engines and power plants. With natural gas providing an alternative to oil, gasoline, and coal in these applications, it promises a marked decrease in the …

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How tubular drainage geocomposite was used in landfill final cover

June 1, 2013

A first for landfills in the southeastern United States. By Thomas B. Maier, P.E., and Stéphane Fourmont Introduction In landfill final cover systems, geocomposite drainage products are frequently used as a drainage layer above the geomembrane layer and for surficial landfill gas collection, either in strips or as a continuous layer, below the geomembrane. For …

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Evaluations of engineered cover systems for mine waste rock and tailings

Geosynthetics for mining waste rock and tailings. By Mark E. Smith and Christos Athanassopoulos Introduction Waste rock dumps and tailings impoundments are common features at mine sites. Many of these waste disposal facilities contain sulfide-rich minerals that generate acid mine drainage (AMD) when they oxidize in the presence of oxygen and water. Control of AMD …

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Measuring a giant one step at a time

April 1, 2013

Leak location survey at the Columbus Upground Reservoir (CUGR) By Abigail Beck Introduction Once construction is complete later this year, the Columbus Upground Reservoir (CUGR) will be the largest continuously-lined lagoon on the planet, nearly twice as large as the lagoon currently holding that title. The sheer enormity of the project has been compounded with …

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Bituminous geomembrane in a final cover exposed to tidal action

By Tarik Hadj-Hamou and Bertrand Breul Abstract Final closures of old abandoned landfills often pose technical and logistical challenges. A small (5 hectares/12 acres) landfill created by pushing waste into a tidal wetland on the edge of Suisun Bay in Northern California was no exception. The initially proposed final cover design called for 60cm (23in.) …