Designing to minimize geomembrane leakage

August 1, 2014

By Abigail Beck Introduction Specifying a geomembrane as a barrier system component for a containment facility seems like a straightforward task. Once a geomembrane is specified, the containment facility won’t leak, right? The reality behind geomembrane installations is that the ultimate performance of an installed geomembrane ranges from completely ineffective to highly effective. What creates …

Ohio EPA addresses wrinkles in landfill FML construction

March 14, 2014

Agency issues guidance document Introduction The Ohio Environmental Protection Agency delivered a document via a March 14 news release regarding wrinkles in FMLs used in landfill construction. Rule requirements Flexible membrane liner (FML) is a component of the composite liner system required at municipal, industrial, and residual solid waste landfills. The municipal and industrial solid …

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9090 testing on LLDPE and HDPE

February 1, 2014

From the GMA Techline 9090 testing on LLDPE and HDPE I would like to know if the 9090 testing was done strictly with 40-mil liners or was it done to multiple thickness liners, HDPE or LLDPE? The Pennsylvania Department of Environmental Protection (Pa.DEP) is requiring I produce it with the chemical compatibility chart to get …

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Geomembrane UV protection?

From the GMA Techline RE: Geomembrane UV protection? I have a question regarding geomembranes and I hope you can help. If a geotextile is placed over a geomembrane, is that considered sufficient to provide long-term UV protection for the geomembrane? Any input is greatly appreciated. Thank you, (Walter | Pennsylvania) Reply: It’s good to hear …

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Allowable construction loading on geosynthetics

From the GMA Techline RE: Allowable construction loading on geosynthetics Hello Dr. Koerner, On the question of allowable construction loading on geosynthetics, Daniel and Koerner (2007) state: “If not specifically excluded in the regulations, and if agreed on by the CQA engineer, all-terrain vehicles (ATVs) or equipment with smooth, oversized tires of maximum ground contact …

New installation guidelines from FGI/IAGI

December 5, 2013

For factory-fabricated lightweight geomembranes The Fabricated Geomembrane Institute (FGI) and the International Association of Geosynthetic Installers (IAGI) have collaborated to produce Guidelines for Installation of: Factory Fabricated Lightweight <0.64mm (25 mil) Thickness. The guidelines are arranged in four parts: 1. General: Guideline scope, references, submittals 2. Products: Geomembrane materials, quality control, geomembrane arrival at project …

New product: High-temperature geomembranes from GSE

November 18, 2013

Retains its mechanical and physical properties Prolonged exposure to temperatures above 60 C (140 F) can have a negative effect on standard polyethylene geomembranes. When the temperature exceeds 60 C, the liner’s mechanical properties more rapidly break down, causing acceleration in stress cracking and oxidation. This can lead to potential failure. In a new product …

Firestone announces expanded distribution model

November 5, 2013

Pond Pro to represent pond lining and geomembrane products Indianapolis-based Firestone Building Products Co. LLC announced in a Nov. 5 press release that it has engaged the Pond Pro sales group to sell its pond lining and geomembrane products. “Firestone Building Products is returning to an independent rep-based distribution model, and we are pleased that …

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Coated, fabricated geomembrane modernizes Tempe’s water infrastructure

October 1, 2013

By John Heap Introduction The primary water treatment system in the city of Tempe, Ariz., serves about 160,000 residents and includes two main facilities: the South Tempe Water Treatment Plant (opened in the 1980s) and the Johnny G. Martinez Water Treatment Plant (built in 1967). The Martinez plant is a 50-million gallon per day (MGD) …

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HDPE liner failures

From the GMA Techline RE: HDPE liner failures I am looking for information related to predictions or assessments of liner failures. The lead regulatory agency for an Environmental Impact Statement (EIS) is requesting data on HDPE liner failure assessments associated with geosynthetic covers. Our application is to use HDPE to cover an overburden stockpile with …