Severn Trent Services, AdEdge Technologies selected for Phase II of EPA Project

The SORB 33 arsenic removal technology and Bayoxide E33 arsenic removal media have been selected for use in the EPA's National Arsenic Treatment Demonstration Project, Phase II. Severn Trent Services and AdEdge Technologies Inc. will be providing arsenic removal systems for demonstration at eight sites in six states...

FORT WASHINGTON, PA, June 6, 2005 -- The SORB 33® arsenic removal technology and Bayoxide® E33 arsenic removal media have been selected for use at eight demonstration sites in the U.S. Environmental Protection Agency National Arsenic Treatment Demonstration Project, Phase II. Severn Trent Services and AdEdge Technologies, Inc., their exclusive partner for the small water systems market, will be providing arsenic removal systems for demonstration in Alvin, Texas; Taos, N.M.; Springfield, Ohio; Stewart, Minn.; Goffstown, N.H.; Sells, Ariz.; Bruni, Texas; and Wellman, Texas.

The National Arsenic Treatment Demonstration Project evaluates the efficiency and effectiveness of drinking water treatment technologies, process modifications, and engineering approaches at various host sites. The project is designed to demonstrate compliance with the new federal arsenic standard of a maximum contamination level (MCL) of 10 parts per billion in drinking water. The program will validate the reliability of Severn Trent's technologies for small systems; gauge the simplicity of their operation, maintenance and required operator skills; determine their cost-effectiveness; and characterize their treatment residuals.

The EPA estimates that approximately 13 million people in the U.S. routinely drink water containing arsenic at concentrations greater than allowed under recently established government standards. Severn Trent Services developed the SORB 33 process to reduce arsenic contamination across a range of water treatment system sizes, and the technology has been commercially proven to effectively and economically meet the stringent new government standards. Bayoxide E33 is a dry, robust, crystalline granular ferric oxide media designed with a high capacity for arsenic, providing long operating cycles and low operating costs. Bayoxide is a registered trademark of Bayer AG.

Severn Trent Services (, based in Fort Washington, Pa., is a leading supplier of water and wastewater treatment solutions. The company's broad range of products and services is concentrated around disinfection, instrumentation, and filtration technologies, pipeline analysis, rehabilitation and repair services, contract operating services and state-of-the-art residential metering products and services. Our international management services business provides support in all aspects of water and wastewater utility development and transformation. Severn Trent Services is a member of the Severn Trent Plc (London: SVT.L) group of companies. An international environmental services leader, Severn Trent is a FTSE 100 company.

AdEdge Technologies (, based in Atlanta, is an innovative marketing and technical services company supplying specialty adsorbents, integrated systems and other products for the removal of contaminants from process or aqueous streams within drinking water, environmental remediation, chemical, wastewater and pharmaceutical applications.

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