Dedicated to advancing the use of fabricated geomembranes through education, research, and technology transfer.

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Factory fabrication reduces field welding, reduces installation time and costs, allows modular construction and provides consistent seam and liner quality.

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Cutting edge topics presented by industry experts & scholars.

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Geosynthetics in Challenging Regulatory Environments
Recorded on November 6, 2019
Presented by Evan Andrews, PE, PMP of Duke Energy

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Education - Research - Technology Transfer

FGI is committed to these objectives. Click below to learn more about our Mission

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New: Design and Installation Detail Drawings

Details available for constructing a containment facility including pipe boots, concrete attachments, penetrations, and vent details.  Both PDF and DWG available.

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Geomembrane Test Method Videos Now Available

FGI has created FIELD AND FACTORY VIDEOS for the following
Test Methods:

D5641 Vacuum Chamber, ASTM D4437 Air Lance Test,
ASTM D5994 Thickness (Textured), D5119 Procedure B Thickness (Smooth), ASTM D7408 Seam Peel Strength, ASTM D882 Tensile Properties & D7408 Seam Shear Strength, ASTM D1204 Dimensional Stability, ASTM D1790 Brittleness Temperature

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We are a non-profit organization providing education, research, and support for the flexible and fabricated geomembrane industry.

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TECH CORNER

Ask the expert...
Tim Stark, FGI Technical Director

Tim Stark, Ph.D., P.E., D.GE., F.ASCE

FGI TECHNICAL DIRECTOR

Review our FAQs and you still have a question, please CONTACT US & Tim will get back to you as soon as possible...

Geomembrane Guide

An interactive list of geomembrane products for various applications. Read more

The FGI Equipment Guide

An interactive list of welding equipment and products for
fabricated geomembranes. Read more

The FGI Pond Leakage Calculator
Geomembranes v. Compacted Clay Liners

Pond Leakage Calculator - Fabricated Geomembranes
Fresh water is a precious resource with demands rising daily and supply greatly fluctuating. Only two (2) percent of all water on Earth is fresh water with the other 98% being salt water.  This 2% of fresh water is comprised of: 87% ice, 12% groundwater, and 1% rivers and lakes.  Thus, only 13% of the available freshwater is readily accessible.  Therefore, it is imperative that we capture and hold these limited water resources for agriculture, domestic use, and industry and also protect valuable groundwater from surface or subsurface contamination.

The FGI’s Pond Leakage Calculator is a Microsoft EXCEL spreadsheet based on Darcy's Law of Seepage and provides a comparison between leakage rates from a canal, pond, or reservoir constructed with compacted fine-grained soils and a geomembrane liner system. The Leakage Calculator allows the user to input the size of the containment basin (including length, width, depth, side slope angle and freeboard), the anticipated level of hydraulic conductivity of the compacted soil or geomembrane liner, and the relative cost of water in dollars per acre-foot of water.

The Calculator then calculates the volume of the basin in gallons, a comparison of leakage rates between the compacted soil and geomembrane liner systems in gallons, and the cost of the leakage based on the cost of water per acre-foot to replace it. This Calculator is designed to help consultants, engineers, architects, and end users decide how to line their canals, ponds, reservoirs, and basins to capture and/or protect valuable fresh water.  The Calculator does not consider variances in construction quality and operational techniques on the long-term effectiveness of the chosen liner system. The FGI has additional research and publications to help with other aspects of successful water containment applications.

Types of Geomembranes
Four (4) popular types of geomembranes are available for pond liner systems.  These four (4) geomembranes in ALPHABETICAL order are: (1) EPDM, (2) reinforced polyethylene (RPE), (3) Polypropylene (PP), and (4) Polyvinyl Chloride (PVC). EPDM (Ethylene Propylene Diene Monomer) geomembranes are unreinforced and have been used for the construction of ponds of varying kinds. EPDM geomembranes are made from rubber and can be welded together with tape and primer. EPDM can be reinforced or unreinforced.  RPE geomembranes have a high tensile strength and puncture resistance because they are reinforced. RPE geomembranes also can be welded with heat.  PP geomembranes can be unreinforced or reinforced depending on the application. Reinforced PP geomembranes also have a high tensile strength and puncture resistance because they are reinforced. PVC geomembranes are also unreinforced and have been used successfully for decades in water canals, ponds, and reservoirs. PVC geomembranes can be welded with heat and/or solvents.

Please click below to access FGI’s Pond Leakage Calculator.
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Temporary Landfill Covers - Design & Construction

Geosynthetics in Challenging Regulatory Environments
Presentd by Evan Andrews, PE, PMP of Duke Energy
Recorded on November 6th , 2019
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News

FGI SHORT COURSE ADDRESSES COAL COMBUSTION RESIDUALS (CCRs)

CURRENT REGULATIONS & SOLUTIONS

The Fabricated Geomembrane Institute (FGI) presented a short course in Charlotte, North Carolina on 6 November 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).  

The excellent and timely presentations focused on the regulations, placement, and management of CCRs, with an emphasis on using geosynthetics.  The morning portion of the short course focused on regulatory issues, containment applications, CCR static properties,and seismic behavior of CCRs.  For example, a presentation by JR Register of Consumers Energy, focused on the current and emerging CCR regulatory issues, while Evan Andrews of Duke Energy provided insight into using geosynthetics to manage, cover, and contain CCRs.  Gary Zych of American Electric Power (AEP)reviewed containment applications for CCRs for AEP facilities. Vincent Ogunro of UNCC followed with an informative presentation on the static material properties and treatment of CCRs. Lastly, Professor Bill Wolfe of The Ohio State University described the seismic behaviors of CCRs and conducting liquefaction analyses for CCRs to wrap up the morning portion.  

The afternoon presentations focused on the practical applications of geosynthetics for CCR management, closure, and containment. For example, Allen Bullock of Leister and Matthew Roy of DemTech provided a demonstration of geomembrane seaming, patching, and testing.  Timothy D. Stark of the University of Illinois at Urbana-Champaign reviewed the importance of geomembrane wrinkles in leakage rates and leak location surveys. Ken Daly of Wood PLC gave an informative presentation on local practices for managing CCRs. Sam Allen of TRI Environmental provided insight on leak location surveys.  Finally, Joe Troxell of S&ME described the largest fabricated geomembrane project in the world, i.e.,Columbus, Ohio Upground Water Reservoir.

Many attendee questions, comments, and experiences made the course a greatsuccess. The topics andspeakers from the successful shortcourseare shown below:

Current &Emerging CCR Regulatory Issues - J.R. Register (Consumers Energy)

Geosynthetics in Challenging RegulatoryEnvironments - E. Andrews (Duke Energy)

Containment for CCRs- G. Zych (American Electric Power) 

Static Properties andInnovations in CCR - V. Ogunro (UNCC)

Dynamic behavior ofCCRs - B. Wolfe (OSU)

Importance of Geomembrane Wrinkles - T.Stark (U of Illinois)

Local PracticeManaging CCRs - K. Daly (Wood)

Leak Location Surveys - S. Allen (TRI)

Case Study:  Largest Fabricated Geomembrane Project -J. Troxell (S&ME)

FGI Welcomes Chesapeake Containment Systems

The Fabricated Geomembrane Institute (FGI) is pleased to welcome its newest installer member, Chesapeake Containment Systems, Inc. (Chesapeake).  Founded in 2007, Chesapeake is an environmental construction firm specializing in geosynthetic supply and installation services. Since 2007, Chesapeake has installed over 300 million square feet of geosynthetics and has over 100 years of combined experience in the industry. To deliver effectively on all their missions Chesapeake is guided by four principles, people, performance, products and progress. The company headquarters is located in Charlotte, North Carolina and their FGI liaison is Ryan Kamp, President, who can be reached at rkamp@ccsliners.com or ccsliners.com. Please help us welcome Chesapeake Containment Systems to the FGI!!!!

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Resources

Pond Leakage Calculator

Use our Excel calculator to learn what measurements are needed to properly plan for your pond liner project.

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FAQs

Frequently asked questions from members, customers and industry professionals answered.

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Specifications & Guides

FGI, ASTM and IAGI material specifications in one place for your reference and convenience

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Geomembrane Guide

A comprehensive guide to industry and our member material offerings for fabricated geomembranes.

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