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

July 30, 2020  |  Environmental, News

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 infor…
Savannah River Nuclear Solutions wins award for geosynthetic coal ash project in South Carolina

October 22, 2018  |  Containment, Environmental, Geosynthetic Clay Liners, News

Savannah River Nuclear Solutions (SRNS) received the Project Management Institute (PMI) Award for Project Excellence at the PMI Professional Awards Gala held in Los Angeles, Calif. in October for work completed at the Savannah River Site (SRS) D-Area Ash Basin Project in South Carolina. The prestigi…
Appeals court orders EPA revisions to 2015 coal ash final rule

August 27, 2018  |  Environmental, Geomembranes, News

The U.S. Court of Appeals for the D.C. Circuit issued a decision Aug. 21 holding that the first-ever federal safeguards set by the Obama administration for coal ash dumps do not sufficiently protect communities and the environment from pollution from coal combustion residual (coal ash) waste. The co…
Protecting geomembranes from animal damage

June 1, 2017  |  Case Studies, Environmental, Feature

Resisting animal and insect attacks on geomembranes is an interesting problem. Geomembrane installers and manufacturers have had numerous geomembranes damaged by bears, deer, coyotes, birds, beavers, and ground squirrels (Figures 1 and 2). In most cases, the damage is incidental to something else th…
Geosynthetics: The science that makes green roofs work

June 1, 2016  |  Case Studies, Environmental

Green roofs 101­–From bottom to top Introduction Most green roofs use a variety of geosynthetic materials to support healthy and sustainable installations. Geosynthetics contribute in many ways to the operational success and long-term sustainability of green roof systems. Because they are lightwe…
‘Largest green roof in the world’ proposed for Silicon Valley project

June 1, 2016  |  Case Studies, Environmental, News

Last year, Uruguayan architect Rafael Viñoly unveiled plans to convert an ageing shopping center in California’s Silicon Valley into a vast development featuring the world’s largest green roof. Viñoly, the architect behind London’s controversial Walkie Talkie building and the skinny 432 Park…
Using geosynthetic materials to effectively close a coal ash pond

October 1, 2015  |  Case Studies, Environmental

Introduction Many electric utilities are required by the U.S. Environmetal Protection Agency’s (EPA) recently published Disposal of Coal Combustion Residuals from Electric Utilities Rule to evaluate and address closure options for historical coal ash storage areas. EPA Administrator Gina McCarthy …
‘Subtitle C’ mixed waste embankment cover system

August 1, 2015  |  Case Studies, Containment, Environmental

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 co…
Geofoam SIPs: Thinking outside the (stick-framed) box

October 1, 2014  |  Environmental, Feature

Introduction In this decade of emerging technologies that seek to decrease carbon footprints, structural insulated panels (SIPs) have come of age. More architects and builders are thinking outside the box when designing with SIPs-creating beautiful buildings that approach net zero energy use and off…
Geofoam solution for underground coal mine tunnel

August 1, 2013  |  Environmental, Feature, Reinforcement

By Terry Meier About 30 miles east of Salina, Utah, nestled in the western bituminous region of Sevier County, is Convulsion Canyon (Photo 1). This is home for a productive Southern Utah Fuel Co. (SUFCO) underground coal mine, where a longwall mining system and continuous miner units extract more th…