GSE Environmental Hosts Coal Ash Technical Seminar

HOUSTON — (NOVEMBER 7, 2012) — GSE Holding, Inc., (NYSE:GSE) the leading global manufacturer
and provider of geosynthetic lining products and services, held a Coal Ash Technical Seminar on October 18
in Chantilly, VA. The seminar, led by a panel of seven of the world’s top geosynthetics experts, covered a variety
of topics of concern to the coal ash industry, particularly in regard to coal ash combustion and storage. GSE’s
Dhani Narejo and Boyd Ramsey were among the presenters. State regulators were also in attendance and
participated in discussions about coal ash regulations.

“It was an honor to be among such a distinguished group of geosynthetics experts discussing what is and will
continue to be an incredibly important aspect of the energy industry,” said GSE Chief Engineer Boyd Ramsey.
“As regulations go into effect, companies will be turning to geosynthetics to ensure they’re compliant. So it’s
crucial to stay on top of the technology and give companies the best possible products to address coal ash storage.”

The seminar drew a diverse crowd of attendees from two countries and 17 states. Several topics concerning
the use of geosynthetics for Coal Combustion Residuals were covered, with particular focus on drainage and
filtration alternatives and design considerations for constructing new disposal cells over legacy ponds.
GSE’s CoalDrain product was demonstrated as a superior option for drainage media at CCR facilities.

GSE’s new Coal Ash Barrier System was also unveiled during the seminar. The system addresses increasing
concerns about coal ash containment and the possibility of groundwater contamination.

Downloads of the presentations and event photos here.

About GSE Environmental

GSE Environmental is a leading manufacturer and provider of geosynthetic lining products and services
with a worldwide presence in the following markets: agriculture, aquaculture, canals, civil, golf courses,
mining, power, storm water retention, waste containment, wastewater, and other industrial applications.
Headquartered in Houston, GSE has global manufacturing and sales offices in the United States, Chile,
Germany, Thailand and Egypt. GSE is a publicly traded company on the New York Stock Exchange under
the ticker symbol “GSE.”

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About GSE

GSE is a leading manufacturer and marketer of geosynthetic lining products and services. We've built a reputation of reliability through our dedication to providing consistency of product, price and protection to our global customers.

Our commitment to innovation, our focus on quality and our industry expertise allow us the flexibility to collaborate with our clients to develop a custom, purpose-fit solution.